CURRICULUM VITAE : David MUIR WOOD
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Mackays to Peka Peka Expressway ■ Tauroa Subdivision
NZ NZ GEOMECHA JUNE 2014 issue 87 N ICS NEWS ICS E N WS NZBulletin of the GEOMECHA New Zealand Geotechnical Society Inc. NICSISSN 0111–6851 ■ Ground Improvement Ground Mackays to ■ Tauroa Subdivision Tauroa Peka Peka Expressway ■ Mackays to Peka Expressway issue 87 JUNE 2014 NZ GEOMECHANICS NEWS EWS N 6851 ICSISSN 0111– GEOMECHA N NZBulletin of the New Zealand Geotechnical Society Inc. ■ Ground Improvement Mackays to ■ Tauroa Subdivision ■ Peka Peka NZGS Life Member and IPENZ Awards Expressway ■ Mackays to Peka Peka Expressway ■ NZGS Life Member and IPENZ Awards SEARCH NZGS at yOUR tauroa subdivision ground improvement App nzgs life member and ipenz awards JUNE STORE 2014 Back issues now free online check out www.nzgs.org issue 87 30/05/14 12:04 pm NZGS TAUROANZGS_june14cv4.indd 1 SUBDIVISION june GROUND IMPROVEMENT 2014 issue 87 NZGS LIFE MEMBER AND IPENZ AWARDS NZGS Back issues now free online check out www.nzgs.org Our multidisciplinary operation specialises We’re proud to be the sole distributor in the fields of ground anchoring, soil in New Zealand for SAMWOO Anchor nailing, drilling, post-tensioning and Technology, BluGeo GRP Powerthread K60 RETAINING YOUR BUSINESS grouting. The combination of capability Bar, Tighter (Kite) Earth Anchors and Grout and depth of technical expertise makes Grippa Grout Sock (Australasia). us a market leader and supports our IS OUR BUSINESS. reputation for providing value engineered solutions to our customers. Over more than 40 years, Grouting Services has delivered We’re experts in: some of New Zealand’s most significant Ground Anchoring, Soil Nailing, Micro-Piling and Post-Tensioning contracts. -
Towards a Geo-Hydro-Mechanical Characterization of Landslide Classes: Preliminary Results
applied sciences Article Towards A Geo-Hydro-Mechanical Characterization of Landslide Classes: Preliminary Results Federica Cotecchia 1 , Francesca Santaloia 2 and Vito Tagarelli 1,* 1 DICATECH, Polytechnic University of Bari, 4, 70126 Bari, Italy; [email protected] 2 IRPI, National Research Council, 4, 70126 Bari, Italy; [email protected] * Correspondence: [email protected]; Tel.: +39-3928654797 Received: 21 September 2020; Accepted: 4 November 2020; Published: 10 November 2020 Abstract: Nowadays, landslides still cause both deaths and heavy economic losses around the world, despite the development of risk mitigation measures, which are often not effective; this is mainly due to the lack of proper analyses of landslide mechanisms. As such, in order to achieve a decisive advancement for sustainable landslide risk management, our knowledge of the processes that generate landslide phenomena has to be broadened. This is possible only through a multidisciplinary analysis that covers the complexity of landslide mechanisms that is a fundamental part of the design of the mitigation measure. As such, this contribution applies the “stage-wise” methodology, which allows for geo-hydro-mechanical (GHM) interpretations of landslide processes, highlighting the importance of the synergy between geological-geomorphological analysis and hydro-mechanical modeling of the slope processes for successful interpretations of slope instability, the identification of the causes and the prediction of the evolution of the process over time. Two case studies are reported, showing how to apply GHM analyses of landslide mechanisms. After presenting the background methodology, this contribution proposes a research project aimed at the GHM characterization of landslides, soliciting the support of engineers in the selection of the most sustainable and effective mitigation strategies for different classes of landslides. -
Crustal Stress State and Seismic Hazard Along Southwest Segment of the Longmenshan Thrust Belt After Wenchuan Earthquake
Journal of Earth Science, Vol. 25, No. 4, p. 676–688, August 2014 ISSN 1674-487X Printed in China DOI: 10.1007/s12583-014-0457-z Crustal Stress State and Seismic Hazard along Southwest Segment of the Longmenshan Thrust Belt after Wenchuan Earthquake Xianghui Qin*, Chengxuan Tan, Qunce Chen, Manlu Wu, Chengjun Feng Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China; Key Laboratory of Neotectonic Movement & Geohazard, Ministry of Land and Resources, Beijing 100081, China ABSTRACT: The crustal stress and seismic hazard estimation along the southwest segment of the Longmenshan thrust belt after the Wenchuan Earthquake was conducted by hydraulic fracturing for in-situ stress measurements in four boreholes at the Ridi, Wasigou, Dahegou, and Baoxing sites in 2003, 2008, and 2010. The data reveals relatively high crustal stresses in the Kangding region (Ridi, Wasigou, and Dahegou sites) before and after the Wenchuan Earthquake, while the stresses were relatively low in the short time after the earthquake. The crustal stress in the southwest of the Longmenshan thrust belt, especially in the Kangding region, may not have been totally released during the earthquake, and has since increased. Furthermore, the Coulomb failure criterion and Byerlee’s law are adopted to analyzed in-situ stress data and its implications for fault activity along the southwest segment. The magnitudes of in-situ stresses are still close to or exceed the expected lower bound for fault activity, revealing that the studied region is likely to be active in the future. From the conclusions drawn from our and other methods, the southwest segment of the Longmenshan thrust belt, especially the Baoxing region, may present a future seismic hazard. -
Geotechnical Stability Analysis
Sloan, S. W. (2013). Ge´otechnique 63, No. 7, 531–572 [http://dx.doi.org/10.1680/geot.12.RL.001] Geotechnical stability analysis S. W. SLOANÃ This paper describes recent advances in stability analysis that combine the limit theorems of classical plasticity with finite elements to give rigorous upper and lower bounds on the failure load. These methods, known as finite-element limit analysis, do not require assumptions to be made about the mode of failure, and use only simple strength parameters that are familiar to geotechnical engineers. The bounding properties of the solutions are invaluable in practice, and enable accurate limit loads to be obtained through the use of an exact error estimate and automatic adaptive meshing procedures. The methods are very general, and can deal with heterogeneous soil profiles, anisotropic strength characteristics, fissured soils, discontinuities, complicated boundary conditions, and complex loading in both two and three dimensions. A new development, which incorporates pore water pressures in finite-element limit analysis, is also described. Following a brief outline of the new techniques, stability solutions are given for several practical problems, including foundations, anchors, slopes, excavations and tunnels. KEYWORDS: anchors; bearing capacity; excavation; numerical modelling; plasticity; slopes; tunnels STABILITY ANALYSIS Limit equilibrium In geotechnical engineering, stability analysis is used to Limit equilibrium is the oldest method for performing predict the maximum load that can be supported by a stability analysis, and was first applied in a geotechnical geostructure without inducing failure. This ultimate load, setting by Coulomb (1773). In its most basic form, this which is also known as the limit or collapse load, can be approach presupposes a failure mechanism, and implicitly used to determine the allowable working load by dividing it assumes that the stresses on the failure planes are limited by by a predetermined factor of safety. -
Downloaded from the Online Library of the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE)
INTERNATIONAL SOCIETY FOR SOIL MECHANICS AND GEOTECHNICAL ENGINEERING This paper was downloaded from the Online Library of the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE). The library is available here: https://www.issmge.org/publications/online-library This is an open-access database that archives thousands of papers published under the Auspices of the ISSMGE and maintained by the Innovation and Development Committee of ISSMGE. Modelling and testing Modélisation et expérimentation David Muir Wood School of Science, Engineering, University of Dundee, United Kingdom, [email protected] ABSTRACT: All soil testing is performed in the context of an implicitly or explicitly assumed (constitutive) model for the soil. The interface between modelling and testing is challenged by deficiencies of the testing and by deficiencies of the model. Many testing configurations lead to inadvertent or inevitable inhomogeneity, so that a soil samples behaves as a system and not a single element. But models are appropriate simplifications of reality and are inevitably deficient. The more severe the deficiency the harder it becomes to calibrate the model against experimental data. Even for more elaborate models, the conjectures on which they are based are rarely subjected to testing regimes which deliberately set out to refute those conjectures. No matter how extensive our testing of a model against laboratory data, a subsequent application will certainly take it into an unknown region in which it is to be hoped that no unintended instabilities will appear. RÉSUMÉ : Tous les essais de mécanique de sols sont effectués dans un contexte d’existence d'un modèle du sol implicitement ou explicitement supposé. -
PLASTICITY and GEOTECHNICS Advances in Mechanics and Mathematics
PLASTICITY AND GEOTECHNICS Advances in Mechanics and Mathematics VOLUME 13 Series Editors: David Y. Gao Virginia Polytechnic Institute and State University, U.S.A. Ray W. Ogden University of Glasgow, U.K. Advisory Editors: I. Ekeland University of British Columbia, Canada S. Liao Shanghai Jiao Tung University, P.R. China K.R. Rajagopal Texas A&M University, U.S.A. T. Ratiu Ecole Polytechnique, Switzerland David J. Steigmann University of California, Berkeley, U.S.A. W. Yang Tsinghua University, P.R. China PLASTICITY AND GEOTECHNICS By HAI-SUI YU University of Nottingham, UK Sprin ger Library of Congress Control Number: 2006928849 ISBN-10: 0-387-33597-8 e-ISBN: 0-387-33599-4 ISBN-13: 978-0-387-33597-1 Printed on acid-free paper. AMS Subject Classifications: 74-xx, 65-xx, 70-xx © 2006 Springer Science-fBusiness Media, LLC All rights reserved. This work may not be translated or copied in whole or in part without the written permission of the publisher (Springer Science-HBusiness Media, LLC, 233 Spring Street, New York, NY 10013, USA), except for brief excerpts in connection with reviews or scholarly analysis. Use in connection with any form of information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks, and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights. Printed in the United States of America. -
Geotechnical and Environmental Research Group Forms Part
Department of Engineering Earthquake Engineering Geoenvironmental Engineering Geotechnical and Ground Improvement Environmental Waste and Sustainable Products Research Group Soil Mechanics Slopes and Landslides Year Book 2006 Foundations and Pipelines Underground Construction generation 2D actuator capable of conducting The Geotechnical and complex construction and testing sequences in flight. We are indebted to the Department’s Senior Design Environmental Engineer, Neil Houghton, for designing and interfacing these new facilities, to Stuart Haigh for overall Research Group project management and commissioning, and to Steve Chandler and his team of technicians – John Chandler, Chris McGinnie, Kristian Pether, Tom The Geotechnical and Environmental Research Johnston and Frank Sixsmith – for carrying out the Group is home to eight academic staff, a senior work on site. technical officer, a computer officer, seven technicians, three administrative staff, five post In parallel with our small-scale modelling, we are graduate researchers and 41 graduate students. The exploring new areas of research to improve interests of the group are wide, encompassing techniques of field monitoring. We are collaborating construction processes; infrastructure; environmental with contractors and infrastructure owners to engineering; earthquakes; and the fundamental develop new field measurement technologies. These mechanics of soils. Since its formation more than 50 aim to provide better control and monitoring of years ago the Group has produced over 180 PhDs. urban construction. Field monitoring with new BOTDR optical fibre technology has been undertaken The Group has extensive facilities for laboratory on a number of piling projects, on major tunnelling testing, centrifuge modelling, and numerical analysis. projects in London and Singapore, and for slope We operate both on the main Engineering stability and soil anchors. -
Numerical Methods in Geomechanics
Antonio Bobet NUMERICAL METHODS IN GEOMECHANICS Antonio Bobet School of Civil Engineering, Purdue University, West Lafayette, IN, USA اﻟﺨﻼﺻـﺔ: ﺗﻘﺪم هﺬﻩ اﻟﻮرﻗﺔ وﺻﻔ ﺎً ﻟﻠﻄﺮق اﻟﻌﺪدﻳﺔ اﻷآﺜﺮ اﺳﺘﺨﺪاﻣﺎ ﻓﻲ اﻟﻤﻴﻜﺎﻧﻴﻜﺎ اﻟﺠﻴﻮﻟﻮﺟﻴﺔ. وهﻲ أرﺑﻌﺔ ﻃﺮق : (1) ﻃﺮﻳﻘﺔ اﻟﻌﻨﺼﺮ اﻟﻤﻤﻴﺰ (2) ﻃﺮﻳﻘﺔ ﺗﺤﻠﻴﻞ اﻟﻨﺸﻮة اﻟﻤﺘﻘﻄﻊ (3) ﻃﺮﻳﻘﺔ اﻟﺘﺤﺎم اﻟﺠﺴﻴﻤﺎت (4) ﻃﺮﻳﻘﺔ اﻟﺸﺒﻜﺔ اﻟﻌﺼﺒﻴﺔ اﻟﺼﻨﺎﻋﻴﺔ. وﺗﻀﻤﻨﺖ اﻟﻮرﻗﺔ أ ﻳ ﻀ ﺎً وﺻﻔ ﺎً ﻣﻮﺟﺰ اً ﻟﺘﻄﺒﻴﻖ اﻟﻤﺒﺎدئ اﻟﺨﻮارزﻣﻴﺔ ﻟﻜﻞ ﻃﺮﻳﻘﺔ إﺿﺎﻓﺔ إﻟﻰ ﺣﺎﻟﺔ ﺑﺴﻴﻄﺔ ﻟﺘﻮﺿﻴﺢ اﺳﺘﺨﺪاﻣﻬﺎ. ______________________ *Corresponding Author: E-mail: [email protected] Paper Received November 7, 2009; Paper Revised January 17, 2009; Paper Accepted February 3, 2010 April 2010 The Arabian Journal for Science and Engineering, Volume 35, Number 1B 27 Antonio Bobet ABSTRACT The paper presents a description of the numerical methods most used in geomechanics. The following methods are included: (1) The Distinct Element Method; (2) The Discontinuous Deformation Analysis Method; (3) The Bonded Particle Method; and (4) The Artificial Neural Network Method. A brief description of the fundamental algorithms that apply to each method is included, as well as a simple case to illustrate their use. Key words: numerical methods, geomechanics, continuum, discontinuum, finite difference, finite element, discrete element, discontinuous deformation analysis, bonded particle, artificial neural network 28 The Arabian Journal for Science and Engineering, Volume 35, Number 1B April 2010 Antonio Bobet NUMERICAL METHODS IN GEOMECHANICS 1. INTRODUCTION Analytical methods are very useful in geomechanics because they provide results with very limited effort and highlight the most important variables that determine the solution of a problem. Analytical solutions, however, have often a limited application since they must be used within the range of assumptions made for their development. -
RAE Annual Review
Bankers National Westminster Bank plc Charing Cross, London Branch PO Box 113 Cavell House 2a Charing Cross Road London WC2H OPD Solicitors Bristows 100 Victoria Embankment London EC4Y 0DH Auditors PKF (UK) LLP Farringdon Place 20 Farringdon Road, London EC1M 3AP Investment Advisers OLIM Limited Pollen House Annual Review 10-12 Cork Street The Royal Academy of Engineering promotes The Royal Academy of Engineering London W1X 1PD excellence in the science, art and practice of 3 Carlton House Terrace, London SW1Y 5DG engineering. Tel: 020 7766 0600 Fax: 020 7930 1549 Registered charity number 293074 www.raeng.org.uk 2011/2012 Engineering Strategic Priorities the Future Competing in the global economy For the engineering leaders of tomorrow A series of debates Two lectures by Lord Browne of Madingley President, The Royal Academy of Engineering 2006-2011 As the UK’s national academy for engineering, we bring together the most successful and talented engineers from across the engineering sectors for a shared purpose: to advance and promote excellence in engineering. We provide analysis and policy support to promote the UK’s role as a great place from which to do business. We take a lead on engineering education and we invest in the UK’s world class A selection of Academy and research base to underpin innovation. We work to improve public awareness and understanding Engineering the Future publications of engineering. We are a national academy with a global outlook and use our international partnerships to ensure that the UK benefi ts from international networks, expertise and investment. 2011/2012 Nuclear Construction Lessons LearnedLessons Learned The Academy’s work programmes are driven by four strategic challenges, each of which provides a key Guidance on bestBest practice:Practice: weldingWelding contribution to a strong and vibrant engineering sector and to the health and wealth of society. -
The Development of Rock Engineering
The development of rock engineering Introduction We tend to think of rock engineering as a modern discipline and yet, as early as 1773, Coulomb included results of tests on rocks from Bordeaux in a paper read before the French Academy in Paris (Coulomb, 1776, Heyman, 1972). French engineers started construction of the Panama Canal in 1884 and this task was taken over by the US Army Corps of Engineers in 1908. In the half century between 1910 and 1964, 60 slides were recorded in cuts along the canal and, although these slides were not analysed in rock mechanics terms, recent work by the US Corps of Engineers (Lutton et al, 1979) shows that these slides were predominantly controlled by structural discontinuities and that modern rock mechanics concepts are fully applicable to the analysis of these failures. In discussing the Panama Canal slides in his Presidential Address to the first international conference on Soil Mechanics and Foundation Engineering in 1936, Karl Terzaghi (Terzaghi, 1936, Terzaghi and Voight, 1979) said ‘The catastrophic descent of the slopes of the deepest cut of the Panama Canal issued a warning that we were overstepping the limits of our ability to predict the consequences of our actions ....’. In 1920 Josef Stini started teaching ‘Technical Geology’ at the Vienna Technical University and before he died in 1958 he had published 333 papers and books (Müller, 1979). He founded the journal Geologie und Bauwesen, the forerunner of today’s journal Rock Mechanics, and was probably the first to emphasise the importance of structural discontinuities on the engineering behaviour of rock masses. -
Guideline for Landslide Susceptibility, Hazard and Risk Zoning for Land Use Planning” Ref: AGS (2007A)
Extract from Australian Geomechanics Journal and News of the Australian Geomechanics Society Volume 42 No 1 March 2007 Extract containing: “Guideline for Landslide Susceptibility, Hazard and Risk Zoning for Land Use Planning” Ref: AGS (2007a) Landslide Risk Management ISSN 0818-9110 GUIDELINE FOR LANDSLIDE SUSCEPTIBILITY, HAZARD AND RISK ZONING FOR LAND USE PLANNING Australian Geomechanics Society Landslide Zoning Working Group TABLE OF CONTENTS 1 INTRODUCTION................................................................................................................................................. 13 2 DEFINITIONS AND TERMINOLOGY............................................................................................................. 14 3 LANDSLIDE RISK MANAGEMENT FRAMEWORK ................................................................................... 15 4 DESCRIPTION OF LANDSLIDE SUSCEPTIBILITY, HAZARD AND RISK ZONING FOR LAND USE PLANNING ........................................................................................................................................................... 16 5 GUIDANCE ON WHERE LANDSLIDE ZONING IS USEFUL FOR LAND USE PLANNING................. 17 6 SELECTION OF THE TYPE AND LEVEL OF LANDSLIDE ZONING ...................................................... 19 7 LANDSLIDE ZONING MAP SCALES AND DESCRIPTORS FOR SUSCEPTIBILITY, HAZARD AND RISK ZONING..................................................................................................................................................... -
General Kofi A. Annan the United Nations United Nations Plaza
MASSACHUSETTS INSTITUTE OF TECHNOLOGY DEPARTMENT OF PHYSICS CAMBRIDGE, MASSACHUSETTS O2 1 39 October 10, 1997 HENRY W. KENDALL ROOM 2.4-51 4 (617) 253-7584 JULIUS A. STRATTON PROFESSOR OF PHYSICS Secretary- General Kofi A. Annan The United Nations United Nations Plaza . ..\ U New York City NY Dear Mr. Secretary-General: I have received your letter of October 1 , which you sent to me and my fellow Nobel laureates, inquiring whetHeTrwould, from time to time, provide advice and ideas so as to aid your organization in becoming more effective and responsive in its global tasks. I am grateful to be asked to support you and the United Nations for the contributions you can make to resolving the problems that now face the world are great ones. I would be pleased to help in whatever ways that I can. ~~ I have been involved in many of the issues that you deal with for many years, both as Chairman of the Union of Concerne., Scientists and, more recently, as an advisor to the World Bank. On several occasions I have participated in or initiated activities that brought together numbers of Nobel laureates to lend their voices in support of important international changes. -* . I include several examples of such activities: copies of documents, stemming from the . r work, that set out our views. I initiated the World Bank and the Union of Concerned Scientists' examples but responded to President Clinton's Round Table initiative. Again, my appreciation for your request;' I look forward to opportunities to contribute usefully. Sincerely yours ; Henry; W.