CTBUH Journal

Total Page:16

File Type:pdf, Size:1020Kb

CTBUH Journal About the Council The Council on Tall Buildings and Urban Habitat is the world’s leading resource for professionals CTBUH Journal focused on the inception, design, construction, and International Journal on Tall Buildings and Urban Habitat operation of tall buildings and future cities. A not-for-profi t organization, founded in 1969 and based at the Illinois Institute of Technology, Chicago, CTBUH has an Asia offi ce at Tongji University, Shanghai, and a research offi ce at Iuav Tall buildings: design, construction, and operation | 2015 Issue II University, Venice, Italy. CTBUH facilitates the exchange of the latest knowledge available on tall buildings around the world through publications, Special Issue: Focus on Japan research, events, working groups, web resources, and its extensive network of international representatives. The Council’s research department Case Study: Abenos Harukas, Osaka is spearheading the investigation of the next generation of tall buildings by aiding original Advanced Structural Technologies research on sustainability and key development For High-Rise Buildings In Japan issues. The free database on tall buildings, The Skyscraper Center, is updated daily with detailed Next Tokyo 2045: A Mile-High Tower information, images, data, and news. The CTBUH Rooted In Intersecting Ecologies also developed the international standards for measuring tall building height and is recognized as Application of Seismic Isolation Systems the arbiter for bestowing such designations as “The World’s Tallest Building.” In Japanese High-Rise Buildings Innovative Façade Systems of Japan Fire-Resistant Design of Tokyo Sky Tree Talking Tall: Hiroo Mori Council on Tall Buildings and Urban Habitat S. R. Crown Hall Illinois Institute of Technology 3360 South State Street Chicago, IL 60616 Phone: +1 (312) 567 3487 Fax: +1 (312) 567 3820 Email: [email protected] www.ctbuh.org www.skyscrapercenter.com CTBUH Asia Headquarters College of Architecture and Urban Planning (CAUP) Tongji University 1239 Si Ping Road, Yangpu District Shanghai 200092, China Phone: +86 21 65982972 Email: [email protected] CTBUH Research Offi ce Iuav University of Venice Dorsoduro 2006 30123 Venice, Italy Phone: +39 041 257 1276 Email: [email protected] ISSN: 1946 - 1186 For complete membership listing go to: This Issue InsideCTBUH Organizational Members http://membership.ctbuh.org Editor The publication of this safety in The Fire-Resistant Design of Tokyo Sky DONORS Alinea Consulting M Moser Associates Daniel Safarik, CTBUH AdrianNews Smith and + Gordon Events Gill Architecture FeaturesAllford Hall Monaghan Morris22 Structural Engineering Maeda Corporation issue marks an Tree (page 48), which explains how substantial Advanced Structural Technologies Introduction of Advanced Seismic Design laminated rubber bearings in seismic- [email protected] Altitude Facade Access Consulting Mori Building Company isolation structures. This design produces ALT Limited For High-Rise Buildings in Japan Entering the 1970s, most high-rise buildings mainly elastic behavior during an were constructed using a seismic design earthquake, so that the seismic energy is This paper reviews the development and current status of seismic design for method that relied on the plastic rotation absorbed by the energy-absorbing members important moment in prudence in fi re engineering nevertheless gave 02 This Issue 52 Tall BuildingsAlvine Engineeringin Numbers high-rise buildings in earthquake-proneNabih Japan. Additionally, Youssef it briefly & Associatescapacity of steel-frame beam ends to incorporated in the framing of each floor. In describes two important areas of wind-resistant design for high-rise buildings provide energy absorption. However, several Japan, many kinds of passive damping American Institute of Steel Construction structural designers believed such designs devices, such as hysteretic dampers using in typhoon-prone areas of Japan. Third, through the example of three recently would leave these buildings with residual standard steel or low-yield-strength steel, oil completed high-rise buildings, Japan’s advanced structural technologies are Associate Editors AMSYSCO National Fire Protectiondeformations in frames subjected Association to large dampers, viscous wall dampers, friction Daniel Safarik, Japan: A History of Tall explored, focusing mainly on structural frameworks, high-strength materials plastic deformation, thereby making dampers, visco-elastic dampers, and so on, the history of the rise to an audacious glass-bottomed observa- Aon Fire Protection Engineering Masayoshi Nakai and response-control damping systems. post-quake restoration difficult. In response have been developed over four decades. to this, the concept of damage-controlled With respect to most recent high-rise Steven Henry, CTBUH Author Progression of Seismic Design Tanabashi’s confidence in this formulation was design began to grow (see Figure 3). buildings in Japan, several types of damping ArcelorMittal Masayoshi Nakai, General Manager National Institute of Standards and Technology In Japan’s High-Rises underscored when, in March of the same year, devices are combined and arranged in Takenaka Corporation CTBUH Editor Innovation 1-1-1, Shinsuna, Koto-ku he suggested that research should be started In Japan, following the implementation of highly integrated ways within their structural ARCADIS (US) Tokyo 136-0075, Japan In 1924, one year after the Great Kanto on the construction in Japan of high-rise the New Seismic Design Codes in June 1981, frameworks, in order to optimally control and Figure 2. Kasumigaseki Building, Tokyo. © Joe Jones. Council. For the past tion deck in the world’s second-highest t: +81 3 6810 5197 [email protected] f: +81 3 6660 6168 Earthquake that devastated Tokyo, Professor buildings like those seen in New York. extensive research has been conducted on reduce the building vibration due to seismic Source: Wikipedia architectsAlliance e: [email protected] Nikken Sekkei Toshikata Sano (1880–1956) added to the seismic-isolation structures. or wind load. It can be said that this a www.takenaka.co.jp Urban Building Law a new requirement: the In an article published in April 1963, Tanabashi uniquely Japanese innovation and and strength, made possible by the use of Arquitectonica International static horizontal seismic factor should be set insisted that high-rise buildings should be The Northridge Earthquake of January 1994, represents an advanced approach for the concrete-filled tubular (CFT) steel columns. Masayoshi Nakai After completing the master course at Graduate as 0.1 or more. Ten years later, Professor Ryo possible in Japan in light of the following Los Angeles, and the Great Hanshin structural design of high-rise buildings. Architectural Design & Research InstituteSchool of Engineering, of Kyoto University, Nakai joined Norman Disney & Young several year the CTBUH man-made structure. The nation’s history of tall Tanabashi (1907–1974) published an article examples. Earthquake of January 1995, Kobe, caused In addition, remarkable progress in Takenaka Corporation in 1984 and has been in Antony Wood, CTBUH/IIT/Tongji University charge of advanced structures such as large space in July 1934 stating that the seismic fracture phenomena in many steel-structure computer-aided structural analysis Arup structures, base isolation and vibration control. resistance of a structure cannot be Given that seismic motion works on small and beam-ends, resulting in considerable Enhanced Seismic Resistance technology has made it possible to use a Notable works include the Fukuoka Dome, Odate 04 CTBUH Latest 54 Talking Tall: Hiroo Mori Jukai Dome, Sapporo Dome and Kaohsiung Stadium adequately assessed simply by providing large structures with identical amplitudes, a concern about the feasibility of restoring dynamic response analysis that can Tsinghua University (Taiwan). In 2004, Nakai received three major ample strength against a static horizontalOMA flower vase might fall over in an earthquake, damaged buildings. In addition to the seismic designs mentioned accurately predict the dynamic behavior of Japanese awards for the structural design of an iconic [email protected] has been reporting on achievements since the early 1960s is base-isolated building, Prada Aoyama. Nakai leads force. Tanabashi contended that the seismic but a large high-rise building would not, above, the seismic safety of high-rise steel columns, beams, shear walls, and various Takenaka’s Advanced Structural Engineering division impact should be expressed using the Tanabashi argued, even if both objects were In 1995 a seismic-isolation structure was put structures is steadily being enhanced due to dampers. This, in turn, has resulted in the Aurecon and is responsible for structural scheme design, expert support for design/construction teams and energy squared by the maximum ground proportionally identical. Put another way, into practical use that adopted energy- following factors: higher strength and construction of high-rise buildings with Antony Wood, The VerticalArchitectus Garden City R&D activities relevant to special structures including velocity, and that the resisting capacityOmrania of a contrary to small boats, large ships& are Associatesabsorption members such as steel and lead sufficient ductility of steel materials, the complex framing. supertall buildings. In 2013, he received a PhD in engineering from Kyoto University. structure should be assessed by using the resistant to capsizing in rough seas. dampers,
Recommended publications
  • Annual Report 2013 1
    Otemachi Building, 6-1, Otemachi 1-chome, Chiyoda-ku, Tokyo 100-8133, Japan http://www.mec.co.jp/index_e.html ANNUAL REPORT2013 Approx. 296m Approx. 240m Approx. Approx. 205m 180m Approx. 36m Approx. 20m Yokohama Landmark Tower Sunshine 60 McGraw-Hill Building Marunouchi Building Paternoster Square Mitsubishi Ichigokan ANNUAL REPORT This report is printed using paper that con- This report has been prepared using tains raw materials certified by the Forest 100% vegetable ink. Every effort is Stewardship Council (FSC)®. FSC ® certifi cation made to contain the incidence of vol- Fiscal Year ended ensures that materials have been harvested atile organic compounds (VOCs) and from properly managed forests. to preserve petroleum resources. Printed in Japan March 31, 2013 2013 113mec_ar表紙英文0815_初戻P.indd3mec_ar表紙英文0815_初戻P.indd 11-2-2 113/09/063/09/06 116:376:37 MITSUBISHI ESTATE CO., LTD. ANNUAL REPORT 2013 1 A Love for People A Love for the City Forever Taking on New Challenges–The Mitsubishi Estate Group Our wish is to provide people who live in, work in and visit the city with enriching and fulfi lling lives, full of stimulating opportunities to meet. The Mitsubishi Estate Group has always pursued the genuine value sought by people in the environments and services it provides. With an eye to the future, we carefully listen to each and every customer, and create the true value they seek. We wish to share with our customers the inspiration and passion we derive from our work. We will constantly take on new challenges to achieve this vision, and through it, we will continuously evolve.
    [Show full text]
  • JAKO201834663385082.Pdf
    International Journal of High-Rise Buildings International Journal of September 2018, Vol 7, No 3, 197-214 High-Rise Buildings https://doi.org/10.21022/IJHRB.2018.7.3.197 www.ctbuh-korea.org/ijhrb/index.php Developments of Structural Systems Toward Mile-High Towers Kyoung Sun Moon† Yale University School of Architecture, 180 York Street, New Haven, CT 06511, USA Abstract Tall buildings which began from about 40 m tall office towers in the late 19th century have evolved into mixed-use megatall towers over 800 m. It is expected that even mile-high towers will soon no longer be a dream. Structural systems have always been one of the most fundamental technologies for the dramatic developments of tall buildings. This paper presents structural systems employed for the world’s tallest buildings of different periods since the emergence of supertall buildings in the early 1930s. Further, structural systems used for today’s extremely tall buildings over 500 m, such as core-outrigger, braced mega- tube, mixed, and buttressed core systems, are reviewed and their performances are studied. Finally, this paper investigates the potential of superframed conjoined towers as a viable structural and architectural solution for mile-high and even taller towers in the future. Keywords: Tall buildings, Tallest buildings, Core-outrigger systems, Braced megatubes, Mixed systems, Buttressed core systems, Superframed conjoined towers, Mile-high towers 1. Introduction and the height race was culminated with the 381 m tall 102-story Empire State Building of 1931 also in New York. Tall buildings emerged in the late 19th century in New Due to the Great Depression and Second World War, dev- York and Chicago.
    [Show full text]
  • The Architecture of Metabolism. Inventing a Culture of Resilience
    Arts 2014, 3, 279-297; doi:10.3390/arts3020279 OPEN ACCESS arts ISSN 2076-0752 www.mdpi.com/journal/arts Article The Architecture of Metabolism. Inventing a Culture of Resilience Meike Schalk Meike Schalk, Assistant Professor, KTH Royal Institute of Technology, School of Architecture and the Built Environment, Östermalmsgatan 26, 100 44 Stockholm, Sweden; E-Mail: [email protected]; Tel.: +46-73-6000906 Received: 10 May 2014; in revised form: 6 June 2014 / Accepted: 10 June 2014 / Published: 13 June 2014 Abstract: The Metabolist movement, with its radical and visionary urban and architectural schemes, drew the attention of an international architecture community to Japan in the 1960s and 1970s. Seen from a contemporary perspective, the movement’s foremost concern was cultural resilience as a notion of national identity. Metabolism responded to the human and environmental catastrophe that followed the atomic bombing of Japan and vulnerability to natural disasters such as earthquakes, with architecture envisioning the complete transformation of Japan as a system of political, social, and physical structures into resilient spatial and organizational patterns adaptable to change. Projecting a utopia of resilience, Metabolism employed biological metaphors and recalled technoscientific images which, together with the vernacular, evoked the notion of a genetic architecture able to be recreated again and again. A specific concern was to mediate between an urbanism of large, technical and institutional infrastructures and the freedom of the individual. My aim is to critically examine the notion of sustainable architecture by rereading Metabolist theories and products, such as terms, models, projects, and buildings. For a better understanding of the present discourse, this text searches for a possible history of sustainable architecture, a subject mostly presented ahistorically.
    [Show full text]
  • Structural Developments in Tall Buildings: Current Trends and Future Prospects
    © 2007 University of Sydney. All rights reserved. Architectural Science Review www.arch.usyd.edu.au/asr Volume 50.3, pp 205-223 Invited Review Paper Structural Developments in Tall Buildings: Current Trends and Future Prospects Mir M. Ali† and Kyoung Sun Moon Structures Division, School of Architecture, University of Illinois at Urbana-Champaign, Champaign, IL 61820, USA †Corresponding Author: Tel: + 1 217 333 1330; Fax: +1 217 244 2900; E-mail: [email protected] Received 8 May; accepted 13 June 2007 Abstract: Tall building developments have been rapidly increasing worldwide. This paper reviews the evolution of tall building’s structural systems and the technological driving force behind tall building developments. For the primary structural systems, a new classification – interior structures and exterior structures – is presented. While most representative structural systems for tall buildings are discussed, the emphasis in this review paper is on current trends such as outrigger systems and diagrid structures. Auxiliary damping systems controlling building motion are also discussed. Further, contemporary “out-of-the-box” architectural design trends, such as aerodynamic and twisted forms, which directly or indirectly affect the structural performance of tall buildings, are reviewed. Finally, the future of structural developments in tall buildings is envisioned briefly. Keywords: Aerodynamics, Building forms, Damping systems, Diagrid structures, Exterior structures, Interior structures, Outrigger systems, Structural performance, Structural systems, Tall buildings Introduction Tall buildings emerged in the late nineteenth century in revolution – the steel skeletal structure – as well as consequent the United States of America. They constituted a so-called glass curtain wall systems, which occurred in Chicago, has led to “American Building Type,” meaning that most important tall the present state-of-the-art skyscraper.
    [Show full text]
  • N.A. Konovalova COMPACTION of SPACE in CONTEMPORARY
    FRINGE BELTS, DEVELOPMENT WITHIN THE NEWEST DEMANDS UDC 721 N.A. Konovalova Scientific Research Institute of the Theory and History of Architecture and Urban Planning, branch of the Federal State Budget Institution “Central Scientific-Research and Project Institute of the Ministry of Construction of the Russian Federation”, 9 Dushinskaya, Moscow, Russia e-mail: [email protected] 1 COMPACTION OF SPACE IN CONTEMPORARY JAPANESE MEGALOPOLISES Abstract: Japan is one of these countries where the problem of urban overconsolidation and, correspondingly, the lack of vacant space, has been present and acute for a long time. If it is impossible to eliminate the population density and the construction boom of large cities, Japan has developed a compensatory mechanism capable of making the negative sides of high density less evident. Reduction of space manifests itself in many elements of urban development: miniature residential buildings have proliferated, capsule-type hotels, gardens and tea houses have shrunk to extremely small sizes. Keywords: high density of Japanese megacities, micro-houses, capsule hotels, modern types of tea houses. Since ancient times, the Japanese have learned to accept things that cannot be changed, and find forms of the most comfortable and productive coexistence with this or that inevitable factor. The problem of high density was not an exception. Reduction of space manifests itself in many elements of urban development: miniature residential buildings have proliferated, capsule-type hotels, gardens and tea houses have shrunk to extremely small sizes. Miniature residential buildings Housing construction in big cities of modern Japan continues to follow the path of increasing density. The individual dwelling house has firmly taken its place in the space of Japanese cities.
    [Show full text]
  • Tokyo Office June 2017 Marketbeat
    TOKYO OFFICE JUNE 2017 MARKETBEAT 1.47% 3.73 % 1.77 msf RENT GROWTH VACANCY RATE NEW COMPLETIONS (YOY) (Q2 2017) (YTD Rentable) Macroeconomic Indicators One Year Q4 16 Q1 17 HIGHLIGHTS Forecast Real GDP Growth 1.4% 1.0% Positive Signs from Corporate Japan Inflation The Japanese economy has posted positive economic growth for the fifth quarter in a 0.3% 0.2% row. Meanwhile corporate profits have shown improvement across three quarters, Unemployment 3.1% 2.8% rising 26% year on year in the first quarter, after a dip in late 2015 and early 2016. Source: Cabinet Office, Statistics Bureau Top Heavy in the Central 5 Wards Central 5 Wards Grade A Rent vs. Vacancy Average asking rents ticked upwards softly after remaining essentially flat for four C&W Forecast 40,000 10 consecutive quarters. Leasing activity has been lively but some landlords, looking to 8 35,000 6 Tsubo 2018 and beyond, are softening their formerly hardline stances on rent and incentives. % 30,000 4 While this is particularly true for larger spaces, for smaller spaces in buildings with JPY/ 2 25,000 0 higher occupancy, rent is still increasing. In general, the upwards pressure on asking rents has eased compared to last year and we are nearing an inflection point. Asking Rent (LHS) Vacancy Rate (RHS) Source: Cushman & Wakefield A Cushman & Wakefield “I know; It’s been comin’ for some time” Central 5 Wards New Supply C&W Forecast Research Publication As we enter into the second half of 2017, the looming supply influx coming in the next 250,000 200,000 few years will weigh heavier on negotiations and relocation decisions, and the market 150,000 DATA 100,000 will start to turn further in favor of tenants.
    [Show full text]
  • Toranomon Hills Mori Tower: Additional Acquisition)
    February 19, 2021 For Translation Purposes Only Real Estate Investment Fund Issuer: Mori Hills REIT Investment Corporation (Securities Code: 3234) 1-12-32 Akasaka, Minato-ku, Tokyo Hideyuki Isobe, Executive Director Asset Manager: Mori Building Investment Management Co., Ltd. Hideyuki Isobe, President & CEO Inquiries: Akira Nemoto General Manager of Financial Department TEL: +81-3-6234-3234 MHR Announces Acquisition of Trust Beneficiary Interest in Domestic Real Estate (Toranomon Hills Mori Tower: Additional Acquisition) Mori Hills REIT Investment Corporation (hereinafter “MHR”) announces that Mori Building Investment Management Co., Ltd. (hereinafter the “Asset Manager”), the asset management company for MHR, has today determined to undertake the asset acquisition described below. 1. Overview of Acquisition and Lease Property name Toranomon Hills Mori Tower Asset to be acquired Trust beneficiary interest (Note 1) Anticipated acquisition price 7,870 million yen (Note 2) Appraisal value 9,856 million yen Sales agreement date February 19, 2021 Acquisition date August 2, 2021 (anticipated) Seller Mori Building Co., Ltd. Acquisition financing Borrowings and cash on hand (anticipated) Lessee Mori Building Co., Ltd. (Note 3) (Note 1) MHR plans to acquire trust beneficiary interest in 87.95% co-ownership interest in compartmentalized ownership of the 28th-35th floors and co-ownership interest in the land use rights. MHR plans to acquire an additional 11% quasi co-ownership interest of the trust beneficiary interest and will hold 78% together with the 67% already acquired. The remaining 22% of the quasi co-ownership interest in the trust beneficiary interest is to be held by Mori Building Co., Ltd. (Note 2) The indicated anticipated acquisition price does not include acquisition-related costs, consumption taxes and other expenses.
    [Show full text]
  • Earthquake-Resistant Design for Architects Revised Edition to Whom This Report May Interest
    Earthquake-resistant Design for Architects Revised edition To whom this report may interest, There are many earth quake prone countries in this world, not only Japan Therefore, at various occasions we were requested to explain our efforts and initiatives for reducing the risk of future earth quakes. After the Great Hanshin Earthquake, we had studied various methods to reduce the damages to ensure inhabitants lives, through collaborations of architects, structural engineers, building mechanical engineers and various specialists. Those considerations were realized in the book “Taishinkyohon” by the Japan Institute of Architects. The book was also revised after the Great East Japan Earthquake experiences. Owing to the language barriers, we are not able to explain easily our initiatives to outsiders. Therefore, we had tried to publish it in an English edition. Nevertheless through economic diculties, English editions had not been translated until now. In 2014, NPO called Japan Aseismic Safety Organization (JASO), decided to donate for the English translation, and furthermore their members donated for editing in English to form this report as well. A free report with internet download http://www.jaso.jp/ Since original Japanese book was published by publisher Shokokusha in Tokyo who still has the right to publish this book, we finally agreed that we would not sell commercially, but disperse only as a delivered free booklet with internet downloads. Therefore, anyone who likes to study is able to download from the HP of JASO who is holding their
    [Show full text]
  • Real Estate Sector 4 August 2015 Japan
    Deutsche Bank Group Markets Research Industry Date Real estate sector 4 August 2015 Japan Real Estate Yoji Otani, CMA Akiko Komine, CMA Research Analyst Research Analyst (+81) 3 5156-6756 (+81) 3 5156-6765 [email protected] [email protected] F.I.T.T. for investors Last dance Bubbles always come in different forms With the big cliff of April 2017 in sight, enjoy the last party like a driver careening to the cliff's brink. Japan is now painted in a completely optimistic light, with the pessimism which permeated Japan after the Great East Japan Earthquake in 2011 forgotten and expectations for the 2020 Tokyo Olympics riding high. The bank lending balance to the real estate sector is at a record high, and we expect bubble-like conditions in the real estate market to heighten due to increased investment in real estate to save on inheritance taxes. History repeats itself, but always in a slightly different form. We have no choice but to dance while the dance music continues to play. ________________________________________________________________________________________________________________ Deutsche Securities Inc. Deutsche Bank does and seeks to do business with companies covered in its research reports. Thus, investors should be aware that the firm may have a conflict of interest that could affect the objectivity of this report. Investors should consider this report as only a single factor in making their investment decision. DISCLOSURES AND ANALYST CERTIFICATIONS ARE LOCATED IN APPENDIX 1. MCI (P) 124/04/2015. Deutsche Bank Group Markets Research Japan Industry Date 4 August 2015 Real Estate Real estate sector FITT Research Yoji Otani, CMA Akiko Komine, CMA Research Analyst Research Analyst Last dance (+81) 3 5156-6756 (+81) 3 5156-6765 [email protected] [email protected] Bubbles always come in different forms Top picks With the big cliff of April 2017 in sight, enjoy the last party like a driver Mitsui Fudosan (8801.T),¥3,464 Buy careening to the cliff's brink.
    [Show full text]
  • Fact Book 2007 (Pdf)
    FACT BOOK 2006–2007 FACT BOOK GENERAL INSURANCE IN JAPAN THE GENERAL INSURANCE ASSOCIATION OF JAPAN CONTENTS Part I Business Results Page I. Key Figures of the General Insurance Business for Fiscal 2006 1. The Number of General Insurance Companies ........................................................................................... 2 2. The Number of Agencies and Sales Staff of Agencies ............................................................................... 2 3. Premiums ........................................................................................................................................................ 3 4. The Amount of Claims Paid .......................................................................................................................... 3 5. Assets and Investment ................................................................................................................................... 4 6. Ordinary Profits and Net Profits for the Current Year ................................................................................ 4 7. Loss Ratio and Operating Expenses Ratio .................................................................................................... 5 8. Ownership of General Insurance Policies ..................................................................................................... 5 II. Major Events ............................................................................................................................................... 6 III. Statistics
    [Show full text]
  • The 9Th International Symposium on Automation and Robotics in Construction June 3-5,1992 Tokyo, Japan
    The 9th International Symposium on Automation and Robotics in Construction June 3-5,1992 Tokyo, Japan Direction-Controlled Lifting System Masahiro Nishimura Construction Technology Development Department Taisei Corporation 3-25-1 Hyakunin-cho, Shinjuku-ku, Tokyo, Japan Shigeyuki Yamashita Engineering Department TOKIMEC Engineering Inc 2-16-46 Minami-Kamata, Ota-ku Tokyo Japan Norimitsu Yoshihama Yokohama Landmark Tower Building Project Site Office, Yokohama Branch, Taisei Corporation 3-2-1 Minatomirai, Nishi-ku, Yokohama, Japan ABSTRACT In the construction of a high-rise building, structural members can be turned by the wind during lifting, making installation work more difficult and reducing productivity. This paper describes a system for the control of rotation around the vertical axis during the lifting of members. The system consists of three major units; a sensing unit, an operation unit, and an actuating unit. The operation unit incorporates a rate gyro, which keeps track of the lifted members in initial direction. It controls the actuating unit, which consists of a pair of blowers that stabilize orientation during lifting. Although this system contributes greatly to safety and work efficiency when used alone, it will also be an extremely useful sub-system in the future total automation of construction. 1. INTRODUCTION In the construction of a super-high-rise building, it is generally the case that the more stories to be constructed, the greater the number of working days lost due to inclement weather. The major causes of this loss are rainfall and strong winds. While some days on which work must be halted occur even in the construction of lower stories regardless of the height, days lost to strong winds occur more frequently as the working height increases.
    [Show full text]
  • Foto Di Tokyo
    FOTO DI TOKYO "Shinjuku": il quartiere perla... Il quartiere più moderno e appariscente della megalopoli giapponese, adagiato nella parte occidentale della città, che trasuda vita e dinamicità da tutti i suoi cementosi pori, ricchissimo di grattacieli, luci a non finire, negozi, sale giochi e chi più ne ha, più ne metta... Shinjuku ovest (Nishi-Shinjuku) è dominato dall'imperioso "Tange Kenzo Tokyo Metropolitan Government Building" con le sue due robuste torri gemelle incorporate nel medesimo edificio. In Shinjuku ovest spiccano numerosi grattacieli, fra essi i più importanti (oltre a quello appena citato) sono: il "Dai-Ichi Seimei Building", il "Sumitomo Building", il "Mitsui Building", l'"Island Tower", il "Shinjuku Center Building", il "Sompo Japan Building" e il "Nomura Building". Shinjuku est invece è più densamente popolato, con insegne al neon, shopping, vita notturna e frenesia metropolitana. Nelle prime foto si vedono (da sinistra verso destra) il "Mitsui" e il "Sumitomo"; nelle altre tre foto si vede il "Tange Kenzo" da diversi punti di inquadratura (tutte foto riferite a Shinjuku ovest). Shinjuku ovest. "Shinjuku Chuo Park" e visuale dei grattacieli attorno (nella seconda e terza foto). Nella quarta foto, partendo rispettivamente da sinistra verso destra, si vedono i seguenti grattacieli: il "Sumitomo Building", il "Mitsui Building", il "Nomura Building" (un po' nascosto sul fondo) e il "Shinjuku Center Building". Shinjuku ovest. "Shinjuku Chuo Park" / "Nomura Building" / "Mitsui Building" / "Tange Kenzo Tokyo Metropolitan Government Building". Shinjuku ovest. Nelle prime due foto si vedono il "Sumitomo Building" ed il "Shinjuku Center Building"; nelle ultime due foto sono ritratte due angolazioni diverse del "Tange Kenzo".
    [Show full text]