THE HONG KONG JOINT STRUCTURAL DIVISION ANNUAL REPORT 2010-2011 INSTITUTION OF ENGINEERS JOINT STRUCTURAL DIVISION
ANNUAL REPORT 2010-2011
1 JOINTJOINT STRUCTURAL STRUCTURAL DIVISION DIVISION ANNUALANNUAL REPORT REPORT 2010-2011 2010-2011
TABLE OF CONTENTS 1 Committee Members 2 List of Technical Meetings, Seminars & Visits 3 - 4 Chairman Report 2010/2011 5 - 9 Events Highlights • Annual Dinner 2010 • Annual Seminar 2010 • Technical Meetings • Technical Visits • IStructE Presidental Address 2010 10 - 18 Structural Excellence Award 2011 19 Awards 20 Annual Visit 2011 21 List of JSD Chairmen
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COMMITTEE MEMBERS
Joint Structural Division Committee Members
Ir Dr KOON Chi-ming Ir Thomas WONG Chairman Committee Member
Ir LAU Chi-kin Ir George CHAN Immediate Past Chairman Committee Member
Ir Dr Eddie LAM Siu-shu Ir Prof Moe CHEUNG Mo-shing Deputy Chairman Committee Member
Ir Ken NG Kin-shing Ir SIU Yin-wai Hon Secretary Committee Member
Ir Aldows TANG Hung-chun Mr Paul YU Wai-keung (July 2010 to January 2011) Hon Treasurer Ex-officio Member (AMC) Representative
Ir Prof CHAN Siu-lai Mr. Keith CHUNG Sai-kit (February 2011 - June 2011) Programme Executive Ex-officio Member (AMC) Representative
Ir Dr Ray SU Kai-leung Mr Ryan CHAK Programme Advisor Ex-officio Member (YMC Representative)
Ir Ben TSE Wai-keung Ir Prof Andrew LEUNG Programme Organiser Co-opted Member
Ir LAM Sze-chuen Ir Edward CHAN Sai-cheong Committee Member Co-opted Member
Ir Paul LEE Kai-hung Ir LAM King-kong Committee Member Co-opted Member
Ir Paul TSANG Sau-chung Committee Member
Ir Prof. Albert KWAN Kwok-hung Committee Member
Ir Gabriel YU Lin-keung Committee Member
IStructE Council Members
Ir Paul PANG Tat-choi Ir LAU Chi-kin Chairman of IStructE matters in HK Sub-committee Council Member (IStructE) (2010)
Ir CHAN Siu-tack Ir Paul TSANG Sau-chung Council Member (IStructE) Council Member (IStructE)
Ir Prof CHOY Kin-kuen Council Member (IStructE) (end in 2010)
Ir Dr KOON Chi-ming Council Member (IStructE) (2011)
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LIST OF TECHNICAL MEETINGS, SEMINARS & VISITS
TECHNICAL MEETINGS DATE DETAILS 23 Aug 2010 Technical meeting on “Design and Construction of iSquare Mall” Ir Adam CHOY Meinhardt (C&S) Ltd.
24 Sep 2010 Technical meeting on “Redevelopment of Upper Ngau Tau Kok Estate” Ir Martin CHOI Housing Department 20 Oct 2010 Technical meeting on “Nano Science and Engineering in Modern Society” Prof Ken P CHONG National Science Foundation, USA 22 Nov 2010 Technical meeting on “Stonecutters Bridge” Mr Naeem HUSSAIN Ove Arup & Partners Hong Kong Ltd. 20 Dec 2010 Technical meeting on “Design and Construction of 1881 Heritage” Ir Edward CHAN Mr Nelson KWOK AECOM Asia Company Ltd. Konwall Construction and Engineering Co. Ltd. 18 Jan 2011 Technical meeting on “URA K11” Mr Chris CHEUNG Ove Arup & Partners Hong Kong Ltd. 22 Feb 2011 Seminar on “Ductility of Reinforced Concrete Beams according to the Code of Practice for Structural Use of Concrete 2004” Ir C W LAW Housing Department 18 Mar 2011 “Micro Crack Detection at Anchorage Systems by Highly Sophisticated Electronic Speckle Pattern Interferometry (ESPI)” Dr Andreas UNTERWEGER University of Tokyo 24 Mar 2011 “New Measures on New and Revised PNAPs/JPNs regarding Building Design to Foster a Quality and Sustainable Built Environment” Ir C M WONG Ir Gabriel YU C M Wong & Associates Ltd. T K Tsui & Associates Ltd. 29 Mar 2011 “Seismic Performance of Non-seismically Designed RC Beam-column Joints and the Related Design Issues” Dr Simon H F WONG Ir Prof J S KUANG The Hong Kong University of Science and Technology 13 Apr 2011 “Latest Development in Concrete Code” Ir M L CHENG Buildings Department 23 May 2011 “Strain Gradient Effects on Flexural Strength Design of Reinforced Concrete Beams and Columns” Ir Dr Johnny HO The University of Hong Kong SEMINARS DATE DETAILS 27 Aug 2010 PSDAS one-day seminar on “Contemporary Seismic Engineering 2010” by various national and international earthquake engineering experts. 9 Sep 2010 中日建築技結構技術交流會 21- 23 Oct 2010 2-day workshop + 1-day technical visit “Use of Steel Hollows in Design and Construction of Buildings – 2010” 18-19 Nov 2010 2-day symposium on steel and composite structures “6th Symposium on Mainland-Hong Kong- Taiwan Symposium on Steel and Composite Structures (SCS-2010)” 14 Dec 2010 Seminar on “Design of Steel Structures According to Eurocode 3” 15-17 Dec 2010 The 13th International Symposium on Tubular Structures 21 Mar 2011 2nd Contemporary Seismic Engineering 2011 1 Apr 2011 Seminar on “Design of Steel Structures – Structural Hollow Sections” Prof Kenji ABE and Prof Ichiro AKAMARU Prof Suwen CHEN Nippon Steel & Sumikin Metal Products Co. Ltd. (Japan) Tongji University (China) Prof Sing-Ping CHIEW Prof Ben YOUNG Nanyang Technological University (Singapore) The University of Hong Kong (Hong Kong) 10 – 11 Jun 2011 IStructE Asia-Pacific Forum on “Sustainability & Excellence in Structural Engineering” 14 Jun 2011 Annual Seminar on “Meeting the Challenge of Low Carbon Emission” 30 Jun 2011 The 3rd International Symposium on “Innovative Design of Steel Structures”
VISITS DATE DETAILS 21 Aug 2010 Technical visit to Vanke Architecture Research Center, No.63 Meilin Rd., Futian District, Shenzhen, China 4 – 8 Sep 2010 HKIE- Joint Structural, Building and Material Divisions – Shanghai Expo Visit 2010 5 Mar 2011 Site Visit to Kennedy Town Swimming Pool 7 – 11 Apr 2011 Annual Visit to Qingdao 11 Jun 2011 Lower Ngau Tau Kok Ph2 Site (Demolition)
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CHAIRMAN REPORT 2010/2011 It is my great honour and pleasure to take up the Chairmanship of the Joint Structural Division (JSD) for Session TECHNICAL MEETINGS 2010/2011. As of April 2011, the JSD had grown its membership to 5,897, of which 246 were Fellows and DATE DETAILS 2,318 were also members of the IStructE. 23 Aug 2010 Technical meeting on “Design and Construction of iSquare Mall” Ir Adam CHOY Meinhardt (C&S) Ltd. Committee Activities 24 Sep 2010 Technical meeting on “Redevelopment of Upper Ngau Tau Kok Estate” The JSD organized a series of activities throughout the year, which included: Ir Martin CHOI • Monthly Committee Meetings Housing Department • Technical Meetings and Site Visits 20 Oct 2010 Technical meeting on “Nano Science and Engineering in Modern Society” Prof Ken P CHONG • Annual Dinner 2010 National Science Foundation, USA • Structural Excellence Award 2011 22 Nov 2010 Technical meeting on “Stonecutters Bridge” Mr Naeem HUSSAIN • Annual Visit 2011 Ove Arup & Partners Hong Kong Ltd. • Annual General Meeting 2010 / 2011 20 Dec 2010 Technical meeting on “Design and Construction of 1881 Heritage” • Annual Seminar 2011 Ir Edward CHAN Mr Nelson KWOK AECOM Asia Company Ltd. Konwall Construction and Engineering Co. Ltd. 18 Jan 2011 Technical meeting on “URA K11” Major Events Mr Chris CHEUNG The Annual Dinner 2010 at the Holiday Inn Golden Mile set a record of about 450 attendees. More significantly, we had a record of 44 table Ove Arup & Partners Hong Kong Ltd. sponsors. I would like to thank all sponsoring companies and organizations for their generous support as well as members of the Organizing 22 Feb 2011 Seminar on “Ductility of Reinforced Concrete Beams according to the Code of Practice for Structural Use of Concrete 2004” Ir C W LAW Committee for their great efforts in putting together such a successful event. Our gratitude must also go to the evening’s Guest of Honour, Ir Housing Department WAI Chi-sing, JP, Permanent Secretary for Development (Works), Development Bureau of the HKSAR Government, who shared his good wishes 18 Mar 2011 “Micro Crack Detection at Anchorage Systems by Highly Sophisticated Electronic Speckle Pattern Interferometry (ESPI)” and thoughtful insights with us at the event. Dr Andreas UNTERWEGER University of Tokyo 24 Mar 2011 “New Measures on New and Revised PNAPs/JPNs regarding Building Design to Foster a Quality and Sustainable Built Environment” As part of JSD’s mission to provide continuous professional development to members, we among others organized a seminar on the Second Ir C M WONG Ir Gabriel YU C M Wong & Associates Ltd. T K Tsui & Associates Ltd. Contemporary Seismic Engineering on 21 March 2011. While local building design codes do not currently require seismic-resistant design, the 29 Mar 2011 “Seismic Performance of Non-seismically Designed RC Beam-column Joints and the Related Design Issues” 512 earthquake in Sichuan, China and the more recent 9.0-magnitude quake in the northeast of Japan on 11 March, 2011, ten days before Dr Simon H F WONG Ir Prof J S KUANG the seminar, raised the issue of whether Hong Kong should consider seismicity resistance in the design of new buildings and the retrofitting The Hong Kong University of Science and Technology of some important existing buildings. In addition to raising awareness, the knowledge shared at the seminar benefitted Hong Kong structural 13 Apr 2011 “Latest Development in Concrete Code” Ir M L CHENG engineers about design requirements and technical developments in seismicity. Buildings Department 23 May 2011 “Strain Gradient Effects on Flexural Strength Design of Reinforced Concrete Beams and Columns” The Structural Excellence Award aims to promote excellence in structural engineering and achievement by structural engineers. To better reflect Ir Dr Johnny HO The University of Hong Kong the nature of the projects and to show appreciation for structural engineers’ hard work, we presented grand awards to local and Mainland/ SEMINARS Overseas projects. Winners of the Structural Excellence Award 2011 were chosen after the Judging Panel made site visits and attended formal DATE DETAILS presentations by the finalists on 16 April, 2011. The results of the Awards will be announced at this year’s Annual General Meeting on 12 May, 2011 by the Chairman of the Judging Panel, Ir Prof Paul PANG. 27 Aug 2010 PSDAS one-day seminar on “Contemporary Seismic Engineering 2010” by various national and international earthquake engineering experts. 9 Sep 2010 中日建築技結構技術交流會 Our Annual Visit this year brought us to the Mainland China. Led by senior members of the JSD, we visited Qingdao from 7 to 11 April, 2011 21- 23 Oct 2010 2-day workshop + 1-day technical visit “Use of Steel Hollows in Design and Construction of Buildings – 2010” to foster knowledge-exchange and experience-sharing in structural engineering. Besides building networks with our Qingdao counterparts, 18-19 Nov 2010 2-day symposium on steel and composite structures “6th Symposium on Mainland-Hong Kong- Taiwan Symposium on Steel and Composite Structures (SCS-2010)” committee members also got a chance to interact with each other outside of a formal corporate environment, allowing ideas to be discussed 14 Dec 2010 Seminar on “Design of Steel Structures According to Eurocode 3” and friendships to be formed in a more casual setting. We concluded our trip with a visit to the Qingdao Urban Planning & Design Research 15-17 Dec 2010 The 13th International Symposium on Tubular Structures Institute. 21 Mar 2011 2nd Contemporary Seismic Engineering 2011 1 Apr 2011 Seminar on “Design of Steel Structures – Structural Hollow Sections” The Annual Seminar is always one of the key events on JSD’s calendar. This year the Seminar, entitled “Meeting the Challenge of Low Prof Kenji ABE and Prof Ichiro AKAMARU Prof Suwen CHEN Carbon Emission”, will be held on 14 June, 2011. Renowned local and overseas professional and academic speakers will share insights Nippon Steel & Sumikin Metal Products Co. Ltd. (Japan) Tongji University (China) and experiences on using innovative and integrative approaches to the design, construction, and revitalization of structures while giving due Prof Sing-Ping CHIEW Prof Ben YOUNG consideration to carbon dioxide emission and energy consumption. As the Seminar takes an interdisciplinary approach covering the natural Nanyang Technological University (Singapore) The University of Hong Kong (Hong Kong) environment, building construction, and economy, it will appeal and benefit a wide audience, including practicing engineers, construction 10 – 11 Jun 2011 IStructE Asia-Pacific Forum on “Sustainability & Excellence in Structural Engineering” professionals, and university students. 14 Jun 2011 Annual Seminar on “Meeting the Challenge of Low Carbon Emission” 30 Jun 2011 The 3rd International Symposium on “Innovative Design of Steel Structures” The JSD has always been actively involved in the Quality Building Award (QBA), a biennial award established in 2002 to give public recognition to buildings of outstanding quality and teams that have demonstrated excellent teamwork in constructing these buildings. This year, the JSD VISITS has taken up the chairmanship of the upcoming QBA2012 and has already formed an Organizing Committee and Sub-committees to actively DATE DETAILS plan, organize, and promote the event. The QBA was founded by seven professional/construction/property-related organizations and the QBA 21 Aug 2010 Technical visit to Vanke Architecture Research Center, No.63 Meilin Rd., Futian District, Shenzhen, China 2012 has grown to 11 organizing institutions/disciplines. 4 – 8 Sep 2010 HKIE- Joint Structural, Building and Material Divisions – Shanghai Expo Visit 2010 Professional Recognition and Training 5 Mar 2011 Site Visit to Kennedy Town Swimming Pool The JSD continues to support the HKIE Structural Examination. Consisting of two parts, a six-hour written examination and a one-hour 7 – 11 Apr 2011 Annual Visit to Qingdao professional interview, the Examination ensures standards and professionalism of corporate membership. The written examination was held 11 Jun 2011 Lower Ngau Tau Kok Ph2 Site (Demolition) on 3 December, 2010 and professional interview will be conducted in June/July 2011.
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CHAIRMAN REPORT 2010/2011 Structural Engineers in the Society The JSD is actively involved in serving the community. We have members sitting on various government committees and task forces providing professional advice to the government in formulating and executing policy matters. Members actively perform the following tasks: • Promote the interests of professional engineers and the community at large; • Act as experts in the accreditation of university programmes and the HKIE Structural Discipline Training Scheme; and • Assess the application for registration of Registered Professional Engineers under the Engineers Registration Board.
IStructE Matters In addition to Ir Prof Paul PANG assuming the role of Chairman of IStructE matters in Hong Kong Sub-committee, Ir S T CHAN, Ir P S TSANG, and I are serving the Council of IStructE to strengthen the link between the IStructE Headquarters and Hong Kong.
Mr. Norman TRAIN, President, and Mr. Martin POWELL, Chief Executive, of the IStructE visited Hong Kong between 6 and 9 December, 2010, during which members of the IStructE in Hong Kong were able to meet them in person. Members had a chance to exchange views and hear about the latest developments of IStructE from the Chief Executive while the President was able to learn about the latest matters in Hong Kong.
The JSD also made arrangements for the IStructE Chartered Membership Part 3 Examination held in Hong Kong on 28 April, 2011. A total of 266 candidates took the examination. To help candidates prepare for the examination, the JSD also organized a technical seminar on examination techniques for the IStructE Chartered Membership Part 3 Examination on 2 April, 2011.
Appreciation This year has passed as quickly as the changing landscape of our city. I would like to take this opportunity to thank all committee members for their hard work and devotion in organizing various activities of the JSD. Special thanks must go to senior members and office bearers for their distinguished efforts and unwavering support. To the incoming Chairman, office bearers and committee members, I wish you every success in growing the JSD not only in size and reach but also in reputation and number of milestones achieved. For my part, I will continue to devote time to participate in JSD activities and to provide advice as needed.
Ir Dr KOON Chi-ming Division Chairman JSD Chairman
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ANNUAL DINNER 2010
Annual Dinner, 29 October 2010
Guest of Honour – Ir WAI Chi-sing, JP Division Chairman, OC Chairman with Guest of Honour & VIPs
Division Chairman - Ir Dr KOON Chi-ming Organizing Committee Chairman - Ir LAM Sze-chuen
The Annual Dinner 2010 was successfully held on 29 October 2010 at the Holiday Inn Golden Mile Hong Kong, drawing a record-breaking attendance of near 450 members and guests. JSD is privileged to have Ir WAI Chi-sing, JP, Permanent Secretary for Development (Works) attended as our Guest of Honour, also amongst our distinguished guests are Mrs Marigold LAU, JP, Director of Architectural Services Department; Mr AU Choi-kai, JP, Director of Buildings Department; Ms Ada FUNG, JP,Deputy Director of Housing Department (Development & Construction); Ir Dr The Hon Raymond HO Chung-tai, SBS S.B.St.J. JP, Member of the Legislative Council (Engineering Functional Constituency); Ir Prof Reuben CHU, JP, President of the HKIE.
Organizing Committee of Annual Dinner Chairman Ir LAM Sze-chuen
Members Ir Dr KOON Chi-ming Ir LAU Chi-kin Ir Aldows TANG Hung-chun Ir LAM King-kong Ir Dr Eddie LAM Siu-shu Ir Paul LEE Kai-hung Ir Ken NG Kin-shing Ir Prof CHAN Siu-lai
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ANNUAL SEMINAR 2010
Annual Seminar, 15th June 2010 The Annual Seminar 2010 on “Structural Engineering for Sustainable Development” was successfully held on 15th June 2010 at the Jockey Club Auditorium, The Hong Kong Polytechnic University, Hung Hom, Kowloon.
By sustainable development, we strive to meet the needs of the present without depriving the ability of future generations to meet their own needs. In light of this, structural engineers are now actively involved in minimizing the potentially damaging environmental impacts stemming from construction and operation of building structures. The seminar delineated how sustainable development is addressed and how structural engineers can apply their expertise to take part in this global tendency. Through various local and overseas projects, the incorporation of sustainable objectives into design, planning, construction and operational criteria are demonstrated. The seminar provided an understanding of interdisciplinary actions required to sustain and optimize the natural, built and socio-economic environment.
We believe the shared insights and experience of renowned local and overseas speakers from prominent professionals and academia were valuable to all practicing engineers, construction professionals and college students.
Organizing Committee of Annual Seminar Chairman Ir Dr KOON Chi-ming
Members Ir LAM Sze-chuen Ir Dr Eddie LAM Siu-shu Ir Ken NG Kin-shing Ir Aldows TANG Hung-chun Ir Ben TSE Wai-keung Ir Paul TANG Sau-chung
Editors Ir Dr Eddie LAM Siu-shu Ir Aldows TANG Hung-chun
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TECHNICAL MEETINGS
Technical Meetings
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TECHNICAL VISITS
Technical Visit to Vanke Architecture Research Centre (VARC) and Precast Factory in Dongguan
The technical visit was conducted on 21 August 2010. VARC was visited in the morning and then the precast factory in Dongguan after lunch. Presentation on the day-to-day operations of precast factory was made by the representatives of precast factory during the greeting lunch.
Technical Visit to Vanke Architecture Research Centre (VARC) VARC is a research organization owned by one of the leading developers in the Mainland China. Recent research focuses on innovative and environmentally friendly construction methodology, such as precast concrete construction.
The research centre is comprised of administration building, workshops, laboratory, covered casting yard, lecture rooms, exhibition area and an extensive “experimental” construction site of precast concrete construction works.
By visiting the sample buildings, a general understanding and appreciation on the advantages of precast concrete construction was familiarized. It was noted that renovation works, building services installation and structural elements could be well coordinated in precast concrete construction.
Technical Visit to Precast Factory in Dongguan Precast concrete elements have been widely adopted in the local construction industry. Precast concrete structural elements include facades, slabs, stairs, beams, etc whilst non-structural elements include concrete blocks, lightweight partitions, road kerbs, drain pipes, planter boxes, etc.
Through visiting the precast factory at Huizhou City of Dongguan, the daily operations on the production of precast elements were further understood. The factory covers an area of about 45,000 sq. m. with a covered casting yard of 10,000 sq. m. Its annual output is up to about 60,000 tons of precast products. Production facilities include covered casting area, lifting cranes, concrete batching plant, covered storage area for aggregates, laboratory and equipments for testing concrete, storage area, fabrication yard for steel formworks, loading and unloading areas. Furthermore, the precast factory has obtained certificate of product conformity, quality assurance, environmental management system and occupational health and safe management system.
During the visit, the following key production operations were attended: • Preparation of steel formworks • Fixing of steel reinforcing bars • Fixing of aluminium windows • Concreting and subsequent surface treatment • Lifting of precast products • Fixing of tile finishes • Exposure of coarse aggregate for construction joint
Prior to delivery of the precast products to construction sites, the following key steps for ensuring quality assurance have to be conducted: • Verification of the concrete cover by using covermeter • Dimension checking • Checking of starter bars • Inspection on tiling finishes against defective plastering • Leveling inspection • Water leakage test for aluminium windows • Protection of window glazing panels • Clear marking of precast products
The precast factory is about 120 km away from Hong Kong and it takes about 2.5 hours to deliver the precast products to Hong Kong. The representatives of the factory advised that the delivery cost is about 25% of the total costs and thus the delivery cost is one of the major cost elements in preparation of tenders.
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IStructE PRESIDENTIAL ADDRESS 2010
IStructE Presidential Address 2010
As always, the 2010 Presidential Visit was an uplifting event of the Joint Structural Division. It was JSD’s honour to receive Mr Norman Train, the 90th President, and Mr Martin Powell, Chief Executive of the IStructE. The Presidential Visit lasted between 6th and 9th December 2010 had provided us a forum for members of the IStructE in Hong Kong to meet the President in person, to learn the latest development of the IStructE from the Chief Executive, to exchange views and let the President to better understand the matters in Hong Kong.
The President began his visit by first meeting students and academics of The Hong Kong University of Science and Technology and The University of Hong Kong on 6th December 2010. On 7th December 2010, the President and the Chief Executive made their official visit to the HKIE headquarters. In the same evening, he delivered his Presidential Address on “Exploring the New Frontiers of Structural Engineering” which was well received by rounds of applause. The Chief Executive also updated us on institutional matters and topical issues of IStructE. This was followed by the highlight of the evening, the Certificate Presentation Ceremony. With sharing of pride and happiness by new members together with their families and senior members, the President presented a total of 31 membership certificates to the newly elected corporate members, all were captured with numerous flashes by cameras. On the last day of his visit, the President met the government officials of the Highways Department and the Presidential Visit was concluded by a site visit to the Stonecutters Bridge, the winning project of the IStructE 2010 Supreme Award and the Grand Award of the Structural Excellence Award 2010 for Structural Engineering Excellence displaying the finest example of structural engineering design.
A group photo taken at the Presidential Address
The President visiting the Stonecutters Bridge
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STRUCTURAL EXCELLENCE AWARD 2011
The Structural Excellence Award (formerly Structural Awards) aims to promote excellence in structural engineering demonstrated through the design and construction of buildings and structures completed in the last two years. The first award was held in 1998/1999 and this year is the thirteenth event. On 19 March 2011, the Judging Panel short-listed eight finalists. Following site visits and project presentations on 16 April 2011, awards were decided with emphasis on engineering approach, innovation/unusual features, integration with other disciplines, buildability, sustainability, energy efficiency/environmental consideration, aesthetics, etc.
There are two categories of entries, namely Hong Kong Projects and Mainland/Overseas Projects. Grand Award of Hong Kong Project goes to the International Commerce Centre and Grand Award of Mainland/Overseas Project goes to the Canton Tower.
Hong Kong Projects
Grand Award International Commerce Centre
Commendation Merit Choi Wai Road Development, Site 2 Ph. 1 (Domestic Block) and Site 2 Ph. 2 (Retail/Carpark Block) Hong Kong Design Institute The One
Finalist Hotel ICON
Mainland / Overseas Projects
Grand Award The Canton Tower, Guangzhou
Commendation Merit Resorts World Sentosa, Singapore
Finalist Shangri-la Villingili Resort and Spa, Addu Atoll, Maldives
Members of the Judging Panel Organizing Committee Chairman Chairman Ir Prof Paul PANG Ir Dr Eddie LAM Siu-shu
Members Members Ir Prof Moe CHEUNG Mo-shing Ir Prof CHAN Siu-lai Ir Dr the Honourable Raymond Ho Chung-tai, SBS, MBE, SBStJ, JP Ir LAU Chi-kin Ir Dr KOON Chi-ming Ir Ken NG Kin-shing Ir Dr LAU Ching-kwong Ir Aldows TANG Hung-chun Prof LI Guo-qiang Ir Prof TENG Jin-guang
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STRUCTURAL EXCELLENCE AWARD 2011
Organizing Committee
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STRUCTURAL EXCELLENCE AWARD 2011 Use of realistic wind profile HONG KONG PROJECTS A realistic wind profile was studied and adopted for the first time in Hong Kong to design a tall building. Together with the consideration of the site topographic effects and the wind directional effects, the GRAND AWARD wind profile with a mean hourly gradient design wind speed of 59.5 INTERNATIONAL COMMERCE CENTRE m/sec and a gradient height of 500m helped to make the structural stability system design more cost-effective.
Structural Engineer: High modulus concrete Ove Arup & Partners Hong Kong Ltd. To control the deflection due to wind, a high-modulus, self-compacting concrete was used for the core wall and mega-columns. The grade Project Manager: 90 concrete with the elasticity value at 39GPa helped to reduce the Harbour Vantage Management Ltd. corewall and column sizes resulting in less self-weight and enhance (A wholly-owned subsidiary of Sun Hung Kai Properties) cost saving. Its fluid-like and self-compacting characteristics are also useful for the RC structures with congested reinforcing bars. Lead Consultant & Project Architect: Wong & Ouyang (HK) Ltd. Superstructure Arup adopted a building configuration of four levels of outriggers Design Architect: together with eight numbers of mega-columns, a robust central core Kohn Pedersen Fox Associates and composite floors. The lowest level of outriggers was designed in prestressed concrete, which helped to save cost under the uncertain Contractor: market in 2003. The other three levels of outriggers in structural Sanfield Building Contractors Ltd steel were designed to anchor in the core wall using the interaction between steel and concrete, an approach that facilitated rebar fixing in congested zones and left core wall openings available for building International Commerce Centre (ICC) is located above the MTR services installation. During the analyses and design, Arup adopted Kowloon Station. The 118-storey skyscraper, at a height of 490m different computing tools for the structural optimization studies on and topped out in 2010, comprises 250,000 sq. m of Grade-A office the material cost and the usable floor area. space, a 100,000 sq. m shopping mall, a luxury hotel at the top floors and the highest observation floor in Hong Kong giving commanding views of the city’s skyline.
It has signified the advanced development of Hong Kong as an international city with the following merits: • The tallest building in Hong Kong and currently the fourth tallest in the world • Taking tall building design in Hong Kong to a new level with innovative designs and engineering.
Unconventional foundations The tower is located above cliff-like bedrock profile varying from 60m to 130m in depth, posing uncertainties to the use of traditional pile types. Arup adopted shaft-grouted barrettes as the foundations, which consists of 241 rectangular barrettes with an average depth of 70m. Grout was injected into the barrette/soil interface to increase the friction capacity of the barrette. A 76m-diameter and 1.5m-thick circular diaphragm wall provided a strut-free lateral support system, facilitating the excavation and basement construction. 12 JOINT STRUCTURAL DIVISION ANNUAL REPORT 2010-2011
STRUCTURAL EXCELLENCE AWARD 2011 HONG KONG PROJECTS
COMMENDATION MERIT CHOI WAI ROAD DEVELOPMENT, SITE 2 PH. 1 (DOMESTIC BLOCK) AND SITE 2 PH. 2 (RETAIL/CARPARK BLOCK)
Deep piling system would be a conventional foundation solution for building structures in close proximity to MTR structure in order to avoid excess stress acted on the MTR line tunnels and to maximize site development potential. The selection of the foundation solution was a challenge in terms of safety, cost and time for this project taking into account the need to complete the target flat construction works within a tight time frame. Project Team made use of the “Residual Stress” left from the Site Formation Works, when over 40m deep of top soil and rock material were removed from the platform of Site. The combined stress analysis was complicated but crucial for the decision making on the foundation solution. Considerations included not only the stress requirements imposed by the PNAPs issued by the Buildings Department, but also the effect due to a local fault line close to the tunnel. As a result, shallow foundations in the Structural Engineer / Architect / Building Services Engineer / form of rafts could be employed for the domestic blocks and the Geotechnical Engineer: Retail/Capark Block. Development and Construction Division Hong Kong Housing Department
Client: Hong Kong Housing Authority
Contractor: China State Construction Engineering Corporation (HK) Ltd.
Structural Excellence atop Rock Quarry The sites of the Choi Wan Road (CWR) Development were formed by the Civil Engineering & Development Department from an abandoned Project Team could therefore use a fast track shallow foundation Rock Quarry. Although Site 2 was the largest site among all the sites scheme for the high-rise domestic blocks without the costly and of the CWR Development, it was located on a platform where the time consuming deep foundation with a saving amount to HK$50M. Kwun Tong MTR Line tunnels ran in the middle of the site at about Without the construction of deep foundation, the construction 20m underneath. The tunnels virtually divided the site into two parts programme was also advanced for about one year to satisfy the and most of the site areas were within the MTR Protection Zone. public housing demand in 2010-2011.
By means of Engineering Solution, the success to place the Retail /Carpark Block on top of the MTR line tunnels made possible an optimum master layout for Site 2. Apart from solving the need to accommodate large flat production and associated facilities within a congested site, the Retail /Carpark Block also served as a noise buffer to screen off part of the traffic noise from Kwun Tong Road to the domestic blocks behind to meet the traffic noise compliance rate.
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STRUCTURAL EXCELLENCE AWARD 2011 structural solution that remained loyal to this creative architectural design and within the limited approved budget. The project was HONG KONG PROJECTS tendered in late 2007 where structural steel price increased by about 40%. To remain within approved budget, a unique, innovative and elegant composite truss has been developed using post-tensioned COMMENDATION MERIT concrete top chord; steel CHS diagonal; and reinforced concrete HONG KONG DESIGN INSTITUTE bottom chord. This creative structural system not only fulfills the functional and aesthetical requirements but also reduced the construction cost. As compared with the original structural scheme, approximately HK$20M has been saved.
The use of the said composite system is not without its own difficulties. One of them is that connection design and detailing became a challenge. Direct load paths between the pre-stress concrete elements, structural steel elements and reinforced concrete elements are especially difficult in a 3D structural form. Finite element model has been used to verify some of the connections.
The Floating Platform is assessable directly from ground by a visually Structural, Geotechnical and Civil Engineers: arresting escalator spanning from ground level. The escalator is Ove Arup & Partners Hong Kong Ltd. supported by a 60m long three-dimensional structural steel truss. P-Δ and non-linear buckling analysis have been carried out. In Client: additional to the basic strength and deflection, dynamic analysis has Hong Kong Design Institute / VTC been conducted to ensure vibrations induced by escalator machines will not cause discomfort to the users. Concept Architect: Coldefy & Associés Architectes Urbanistes
Project Architect: P&T Architects and Engineers Ltd.
Building Services Engineers: Parsons Brinckerhoff (Asia) Ltd.
Main Contractor and Construction Advisor: Penta-Ocean – CRCC Joint Venture
Foundation Contractor: Kin Wing Engineering Co., Ltd.
Starting from a white sheet, which represents a unique symbol for the campus of Hong Kong Design Institute (HKDI); it expresses the virgin space where creativity transforms an idea into a visible expression. (from Coldefy)
The HKDI is accentuated by a 2-storey tall, 108m by 108m Floating Platform elevated at 32m clear above the ground level, supported by four vertical steel diagrid towers. This creative architectural design has been stunningly realized by an innovative and spectacular building structure.
The gross floor area for HKDI is approximately 38,000m². The structure is composed of three main elements: (1) the reinforced concrete podium for recreational/academic activities; (2) four diagrid towers for teaching facilities; and (3) the Floating Platform for learning resource centre and design studios.
One of the challenges in the structural engineering is to deliver a
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STRUCTURAL EXCELLENCE AWARD 2011 comfort. The maximum corner acceleration is 17.3 mg, which is within the criterion of 25 mg. HONG KONG PROJECTS To enhance rigidity of the structure for controlling the lateral movement of building, outrigger walls were introduced into the COMMENDATION MERIT structure at E&M floors (L14 and L15) and roof floor. THE ONE This project locates at city centre with numbers of existing buildings in close vicinity. It is only 5m away from the existing MTR tunnels and the busy pedestrian and traffic roads, which imposes severe site constraints at both design and construction stage. Extra care and precautionary measures had been implemented during construction. With the close collaboration of design teams and the contractor, the project was completed within the fast-track construction time-frame and zero industrial accidents was recorded.
To minimize the settlement and unexpected collapse of existing ground, pre-grouting works were carried out to fill up the void before commencement of pipe pile works. Preloaded circular hollow section was adopted as strut members for better buckling resistance and minimized ground settlement. Closely liaison with MTRCL and 24- hour comprehensive monitoring was provided to ensure the works Structural Engineer: did not cause any adverse effect to the MTR’s operation. AECOM Asia Company Ltd. To provide a spacious column-free event hall between UG2/F and 3/F, Developer: hanger composite-column is adopted to support 10-storey of floor Chinese Estates (The One) Ltd. loading from L5 to L14 above the atrium. The great tension force from hanger column is transferred to deep wall beam at E&M floor above Architect: by series of shear connectors. This structural scheme makes use of LWK & Partners Architects unusable spaces at E&M floors and avoids adopting a deep beam above atrium at UG2/F. Contractor: Gammon Construction Ltd. The advertisement signboard at roof is mounted on a steel space- truss which in turn supported by outrigger beams. Bolt and nut connection was used to facilitate the site manoeuvring and fabrication The One, the Former Tung Ying Building, locates at one of the busiest for structural steel at level 163m above ground. street in Nathan Road, Kowloon. This redevelopment project displaces the original Tung Ying Building to a 29-storey retail complex, which is This redevelopment project provides a new hot spot for tourists and the tallest among retail buildings in Hong Kong. the youth and serves as one of the best consumer attraction in Hong Kong. The building consists of 5 levels basement of depth over 30m below existing ground level and 24 levels of tower. The total building height above ground is 163m and typical floor height is 6m approximately. The basement is mainly utilized as car parking and retails. Retails, restaurants and cinema are located at the tower. Sky garden, with 12m floor-to-floor, locates at level 16, which provides a green environment at the urban area. Nice scenery can be viewed at the sky garden. A 56m width and 12.9m high advertisement signboard locates at the roof of the building, which sparkles the night sky of Tsim Sha Tsui.
Building height is about 193m from basement level with structural breadth of 21m in the least dimension. The aspect ratio (height / breadth) of the building is about 9.2, the building is therefore a very slender structure. The 56m x 12.9m high advertisement signboard is placed at the top of the building which significantly increases the wind load to the building. To accurately assess the effect of wind load, wind tunnel test had been carried out at early design stage and also determined the building acceleration to control the occupant’s 15 JOINT STRUCTURAL DIVISION ANNUAL REPORT 2010-2011
STRUCTURAL EXCELLENCE AWARD 2011 54m x 40.5m. The form of the Tower is generated by the rotation of the two ellipses, forms a “waist” at about 280m above ground level. MAINLAND / OVERSEAS PROJECTS There are 24 inclined columns that their setting out are based on “equal sector area” method. GRAND AWARD THE CANTON TOWER, GUANGZHOU
The Principal Ellipses Column Setting Out
The Tower structural system consists of inner concrete core of elliptical shape measuring 17m x 14m at its base, and external steel braced frame tube. The main load carrying elements are the tapering concrete-filled steel columns, horizontal rings with diagonals integrate the entire framework’s structural integrity.
Structural and Geotechnical Engineering Consultant: ARUP
Owner: Guangzhou New TV Tower Construction Co., Ltd Outer Frame = Column + Rings + Diagonals Architect: External Braced Frame Information Based Architecture (Amsterdam) The Tower is an example of full integration of architecture and Local Design Institute: structural engineering, which structure and mathematics formed the Guangzhou Design Institute backbone of the integration. Parametric modeling techniques were performed for the outer frame to study the structural behavior during Main Contractor: the process of geometry optimization. Shanghai Construction Group – Guangzhou Municipal Construction Group JV The Tower’s unique structural form is not covered in any international building codes between building zones are open. Arup teamed up with the creative Architect, Information Based Architecture (Amsterdam) won the international design competition Determining the accurate wind load and the the accuracies of of the 600m Guangzhou New TV and sightseeing tower (now lateral drift deflection limit are important for the structural design. A known as the Canton Tower) in 2004. The Project was completed deflection limit of H/250 with control of building acceleration limited in 2010 which the grand opening was officiated by the Mayor on 29 to 30mg at 10 year wind return period were agreed. September 2010. Arup led wind tunnel laboratories to perform a series of wind tunnel Standing at a height of 600m, the Canton Tower is a stunning new topography test and large sectional wind model test (1:150 scale) urban landmark of Guangzhou sitting on the water’s edge of the and used numerical method for integration of wind forces. Pearl River. An open-air superstructure that pirouettes against the dynamic skyline. The Canton Tower is now the tallest Tower in the Computational fluid dynamic modeling was used to assess solar world, surpassed the 553m CN Tower in Canada. The slender tower temperature variation of the tower and thus designed for the is a structural engineering triumph and challenge. temperature stress.
The Tower is composed of five zones, described as mini-buildings. To enhance the structure comfort under wind-induced vibration, a There are 37 floors in total with a gross floor area of about 44,000 damping system at the top of the Tower and in the antenna mast was sq. m. The mini-buildings are subdivided into programmatic zones developed to reduce the wind induced vibrations. including observatory decks, technical floors of TV and radio transmission, exhibition area, conference rooms, 4D cinema and Detailed buildability consideration including the module erection restaurant floors etc. There is a skywalk open staircase of 180m long of tower external frame was studied in detail. The well thought between the third and fourth building zones. The main roof level is at Engineer’s concept on erection proved to have high value in the 454m above ground with an antenna mast of 146m built at the top construction planning. of the roof. The Canton Tower in its own form is environmentally friendly which The Tower form is generated by two principal ellipses at the tower base and top. The base ellipse is 80m x 60m and the top ellipse is now becomes a new landmark in Guangzhou and its citizens. 16 JOINT STRUCTURAL DIVISION ANNUAL REPORT 2010-2011
STRUCTURAL EXCELLENCE AWARD 2011 • Underpinning and strengthening works to the existing Sentosa Express Monorail. MAINLAND / OVERSEAS PROJECTS • 74m span mega trusses providing a column-free ballroom inside the Hard Rock Hotel with a floor area of about 5,000 sq. m. • 58 meter span mega trusses providing a column-free showroom COMMENDATION MERIT inside the Festive Hotel with a floor area of about 5,000 sq. m. RESORTS WORLD SENTOSA SINGAPORE • Superstructures for six hotels adopting a mixture of reinforced concrete and precast concrete construction together with a Structural Engineers: number of 20m span transfer beams and slabs to support the AECOM Asia Co. Ltd. superstructures. • Over 80 types of steel roofs and canopies. Client: • Part of the theme park of USS sits on the e-deck of the basement Resorts World Sentosa Singapore supporting an eco lagoon. • Most of the indoor rides are housed within a long span steel Architects: structure with precast claddings and green roofs. Michael Graves & Associates • Large span ETFE canopies providing weather shield to the park DP Architects Pte Ltd, Singapore users.
Contractors: As well as providing expert design engineering consultancy for Sembawang Engineers and Contractors Pte Ltd. civil and structural works, AECOM also recommended the method (Site Formation, Basement, Raft & Underpinning Works) of construction to help the client and project managers to derive an efficient works sequence and contract interface, such that the China Jingye Engineering Corporation Ltd. (Singapore Branch) design and construction could be processed concurrently during (USS, Maritime Xperiential Museum & Steel Roof Works) the early stages of the project. The first phase of the development was completed within three years with effective utilization of precast Kajima – TiongSeng JV concrete and steel construction for the key building structures (Festive Hotel, Crockfords Tower & Hotel Michael Works) whereas to adopt in-situ construction for the remaining to ensure works completed within a tight design and construction program. Low KengHuat (Singapore) Ltd. Moreover, with the implementation of quality assurance management (Hard Rock Hotel Works) systems, the entire fabrication, transportation and erection process of the heavy mega steel trusses that were fabricated with Chinese structural steel was a huge success. The Sentosa Integrated Resort Development is located at the north- east of the Sentosa Island, Singapore with approximately a 650m long waterfront fronting the Cruise Bay, and the total site area is approximately 49 hectares. It comprises a collection of thematic hotel resorts, family leisure theme parks, a museum, a casino, retail and entertainment facilities. It involves the construction of a two levels basement substructure, six hotels with a total of 1800 rooms, namely, i) Hard Rock Hotel, ii) Festive Hotel, iii) Crockfords Hotel, iv) Hotel Michael, v) Equarius Hotel, and vi) ESPA Villas. Other attractions include the Universal Studio Singapore (USS) Theme Park with 22 show and ride attractions. The two levels basement substructure measures approximately 375 x 818m at Level B1, and 353 x 395m at Level B2.
The construction site was handed over to the client in December 2006 while the project was planned for completion by early 2010. With the vast amount of construction works, and a tight design and construction program, the client had specified fast-track construction for all the structures and buildings.
The key features of the development in the civil and structural design included: • Land reclamation works on two sites. • A 2 levels basement substructure on a raft foundation with drainage blankets. • Open cut excavation retaining systems with soil nails.
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JOINT STRUCTURAL DIVISION ANNUAL REPORT 2010-2011
ANNUAL VISIT 2011 On 7-11 April 2011, the JSD Committee Members and senior members of the division visited Qingdao, which is cited as China’s “capital of sailing” and Asia’s Best nautical city. The Annual Visit started by fruitful introduction of the Qingdao Bay Bridge by Shandong Hi-Speed Group Co., Ltd, followed by a site visit to the world’s longest over-water bridge with an overall length of 42.58 km linking the city of Qingdao in Eastern China’s Shandong province with the suburban Huangdao District across the water of the northern part of Jiaozhou Bay. It is designed to withstand severe earthquakes, typhoons, and collision by ships.
Then, a visit to the Qingdao Metro Corporation Headquarters was arranged with a presentation of the detailed planning of the transport network. The construction of the first line of Qingdao Metro, Line M3, was started on 30 November 2009 and is expected to be completed in 2014 with a total of 22 stations. According to the plan, eight lines totaling 231.5 km will be constructed in seven districts in Qingdao. The M1, M2, M3, M4 and M5 lines will be built in urban districts, the M6 and M7 in Huangdao District (situated on the west bank of Jiaozhou Bay), and the M8 will be constructed in Hongdao District.
The Annual Visit was concluded by a interaction with the Qingdao Urban Planning and Design Institute. The Institute was established in 1985 under the Qingdao Municipal Planning Bureau, undertaking project feasibility studies and urban planning consulting services in Qingdao.
20 JOINT STRUCTURAL DIVISION ANNUAL REPORT 2010-2011
JOINT STRUCTURAL DIVISION LIST OF CHAIRMEN SESSION NAME OF CHAIRMAN 1st 79/80 Ir TSUI Tack-kong 2nd 80/81 Ir Prof Fred NG Sai-ho 3rd 81/82 Ir Dr Raymond HO Chung-tai 4th 82/83 Ir Andrew NGAI Bick-yau 5th 83/84 Ir David George HOLMES 6th 84/85 Ir Brian POON Hon-yin 7th 85/86 Ir David CHAN Wing-keung 8th 86/87 Ir Barry John STUBBINGS 9th 87/88 Ir Dr LAW Kwok-sang 10th 88/89 Ir Patrick YIM Chun-nam 11th 89/90 Ir Dr Joseph CHOW Ming-kuen 12th 90/91 Ir Bruce Malcolm FOX 13th 91/92 Ir TSE Pak-kin 14th 92/93 Ir Ricky SO Yau-chi 15th 93/94 Ir Hugh WU Sai-him 16th 94/95 Ir Ignatuis LAU Yik-sum 17th 95/96 Ir WONG Chi-ming 18th 96/97 Ir CHEUNG Kwok-ming 19th 97/98 Ir Prof KO Jan-ming 20th 98/99 Ir Prof James LAU Chi-wang 21st 99/00 Ir Kenneth LAU Kwong-hon 22nd 00/01 Ir Prof Reuben CHU Pui-kwan 23rd 01/02 Ir Prof Paul PANG Tat-choi 24th 02/03 Ir Johnny FAN Siu-kay 25th 03/04 Ir Helen KWAN Po-jen 26th 04/05 Ir Joseph MAK Yiu-wing 27th 05/06 Ir Prof CHOY Kin-kuen 28th 06/07 Ir CHENG Yan-kee 29th 07/08 Ir KWAN Kin-kei 30th 08/09 Ir CHAN Siu-tack 31st 09/10 Ir LAU Chi-kin 32nd 10/11 Ir Dr KOON Chi-ming
21 THE HONG KONG INSTITUTION OF ENGINEERS JOINT STRUCTURAL DIVISION
ANNUAL REPORT 2010-2011