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Author: Erik Jon Malvick
Publisher:
ISBN:
Category :
Languages : en
Pages : 566
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Author: Erik Jon Malvick
Publisher:
ISBN:
Category :
Languages : en
Pages : 566
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Book Description
Author: Ronnie Kamai
Publisher:
ISBN: 9781267238955
Category :
Languages : en
Pages :
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Book Description
Void redistribution in layered soil profiles can significantly affect the residual strength of a liquefied soil and the resulting deformations. Liquefaction-induced seepage may get trapped under lower-permeability layers, leading to a localized increase in void ratio, strength loss and enhanced deformations. Since the transient changes in void ratio cannot be measured in the field or in large physical models, its effects can be inferred from shear strain localizations at permeability interfaces and from delayed failure, based on the theoretical understanding and empirical experience. The mechanisms affecting void redistribution, shear-strain localization, and their inter-relationships are examined in this study. The effects of void redistribution are typically not directly accounted for in practice, and at best can be explicitly accounted for by using the empirical case-history based relationships for residual strengths. However, physical models have shown that the effects of void redistribution depend on many parameters, such as the layer thickness, slope angle, permeability contrast between the layers, shaking intensity, duration and history, and hence cannot be directly correlated with the pre-earthquake soil properties, as implied from the case-history based relationships. The purpose of the study presented in this dissertation is two-fold: (1) to continue the characterization and advance the understanding of the void-redistribution strength-loss mechanism and related effects, and (2) to evaluate the ability of the currently available numerical tools to directly account for void-redistribution strength-loss mechanism. First, an analytical study of void redistribution is presented, based on back-analysis of two dense instrumentation arrays from the centrifuge test SSK01, which experienced lateral spreading and shear strain localization. Shear stress and strain are calculated from accelerometer recordings and volumetric strains are calculated from pore-pressure transducers. The analysis provides insight on the flow patterns and their relation to the observed displacements in the test. Second, the material model PM4Sand is presented and its response to partially-drained conditions is explored through single-element FLAC simulations under different patterns of loading. The PM4Sand model is then used to simulate two boundary-value problems in which void redistribution and shear strain localization were important mechanisms in the overall model response - the centrifuge tests SSK01 and EJM02. The simulations are performed to evaluate the ability of the currently available numerical tools to capture the full observed mechanism, including shear strain localization and delayed failure. Simulation results are compared to the centrifuge tests measurements and observations, as well as with the back analyses on the instrumentation arrays. Parametric studies on cyclic strength, permeability and other uncertain factors are presented. For the simulations of the centrifuge test EJM02, two constitutive models are compared (PM4Sand and UBCSand), both capturing some aspects of the observed response but not all. Finally, the limitations in predicting the effects of void redistribution and shear strain localization are discussed.
Author:
Publisher:
ISBN:
Category : Engineering geology
Languages : en
Pages : 716
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Book Description
Author: P. Guo
Publisher: Taylor & Francis
ISBN: 1351424610
Category : Technology & Engineering
Languages : en
Pages : 1046
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Book Description
Papers cover topics including: physical modelling facilities; experimental advances; seismic experimental advances; education; soil behaviour; offshore systems; cold regions; geo-environment; dynamics; earthquake effects; and strategies for disaster reduction.
Author: Francesco Silvestri
Publisher: CRC Press
ISBN: 0429633505
Category : Technology & Engineering
Languages : en
Pages : 5946
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Book Description
Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions contains invited, keynote and theme lectures and regular papers presented at the 7th International Conference on Earthquake Geotechnical Engineering (Rome, Italy, 17-20 June 2019. The contributions deal with recent developments and advancements as well as case histories, field monitoring, experimental characterization, physical and analytical modelling, and applications related to the variety of environmental phenomena induced by earthquakes in soils and their effects on engineered systems interacting with them. The book is divided in the sections below: Invited papers Keynote papers Theme lectures Special Session on Large Scale Testing Special Session on Liquefact Projects Special Session on Lessons learned from recent earthquakes Special Session on the Central Italy earthquake Regular papers Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions provides a significant up-to-date collection of recent experiences and developments, and aims at engineers, geologists and seismologists, consultants, public and private contractors, local national and international authorities, and to all those involved in research and practice related to Earthquake Geotechnical Engineering.
Author: Andrew McNamara
Publisher: CRC Press
ISBN: 0429797613
Category : Technology & Engineering
Languages : en
Pages : 1240
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Book Description
Physical Modelling in Geotechnics collects more than 1500 pages of peer-reviewed papers written by researchers from over 30 countries, and presented at the 9th International Conference on Physical Modelling in Geotechnics 2018 (City, University of London, UK 17-20 July 2018). The ICPMG series has grown such that two volumes of proceedings were required to publish all contributions. The books represent a substantial body of work in four years. Physical Modelling in Geotechnics contains 230 papers, including eight keynote and themed lectures representing the state-of-the-art in physical modelling research in aspects as diverse as fundamental modelling including sensors, imaging, modelling techniques and scaling, onshore and offshore foundations, dams and embankments, retaining walls and deep excavations, ground improvement and environmental engineering, tunnels and geohazards including significant contributions in the area of seismic engineering. ISSMGE TC104 have identified areas for special attention including education in physical modelling and the promotion of physical modelling to industry. With this in mind there is a special themed paper on education, focusing on both undergraduate and postgraduate teaching as well as practicing geotechnical engineers. Physical modelling has entered a new era with the advent of exciting work on real time interfaces between physical and numerical modelling and the growth of facilities and expertise that enable development of so called ‘megafuges’ of 1000gtonne capacity or more; capable of modelling the largest and most complex of geotechnical challenges. Physical Modelling in Geotechnics will be of interest to professionals, engineers and academics interested or involved in geotechnics, geotechnical engineering and related areas. The 9th International Conference on Physical Modelling in Geotechnics was organised by the Multi Scale Geotechnical Engineering Research Centre at City, University of London under the auspices of Technical Committee 104 of the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE). City, University of London, are pleased to host the prestigious international conference for the first time having initiated and hosted the first regional conference, Eurofuge, ten years ago in 2008. Quadrennial regional conferences in both Europe and Asia are now well established events giving doctoral researchers, in particular, the opportunity to attend an international conference in this rapidly evolving specialist area. This is volume 2 of a 2-volume set.
Author: Kyriazis D. Pitilakis
Publisher: Springer Science & Business Media
ISBN: 1402058934
Category : Technology & Engineering
Languages : en
Pages : 497
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Book Description
This book contains the full papers on which the invited lectures of the 4th International Conference on Geotechnical Earthquake Engineering (4ICEGE) were based. The conference was held in Thessaloniki, Greece, from 25 to 28 June, 2007. The papers offer a comprehensive overview of the progress achieved in soil dynamics and geotechnical earthquake engineering, examine ongoing and unresolved issues, and discuss ideas for the future.
Author: Yoon-Moon Chun
Publisher: CRC Press
ISBN: 0415415861
Category : Technology & Engineering
Languages : en
Pages : 1756
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Book Description
The construction materials industry is a major user of the world’s resources. While enormous progress has been made towards sustainability, the scope and opportunities for improvements are significant. To further the effort for sustainable development, a conference on Sustainable Construction Materials and Technologies was held at Coventry University, Coventry, U.K., from June 11th - 13th, 2007, to highlight case studies and research on new and innovative ways of achieving sustainability of construction materials and technologies. This book presents selected, important contributions made at the conference. Over 190 papers from over 45 countries were accepted for presentation at the conference, of which approximately 100 selected papers are published in this book. The rest of the papers are published in two supplementary books. Topics covered in this book include: sustainable alternatives to natural sand, stone, and Portland cement in concrete; sustainable use of recyclable resources such as fly ash, ground municipal waste slag, pozzolan, rice-husk ash, silica fume, gypsum plasterboard (drywall), and lime in construction; sustainable mortar, concrete, bricks, blocks, and backfill; the economics and environmental impact of sustainable materials and structures; use of construction and demolition wastes, and organic materials (straw bale, hemp, etc.) in construction; sustainable use of soil, timber, and wood products; and related sustainable construction and rehabilitation technologies.
Author: Bradley Dodd
Publisher: Elsevier
ISBN: 008098200X
Category : Technology & Engineering
Languages : en
Pages : 469
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Book Description
Adiabatic shear localization is a mode of failure that occurs in dynamic loading. It is characterized by thermal softening occurring over a very narrow region of a material and is usually a precursor to ductile fracture and catastrophic failure. This reference source is the revised and updated version of the first detailed study of the mechanics and modes of adiabatic shear localization in solids. Building on the success of the first edition, the book provides a systematic description of a number of aspects of adiabatic shear banding. The concepts and techniques described in this work can usefully be applied to solve a multitude of problems encountered by those investigating fracture and damage in materials, impact dynamics, metal working and other areas. Specific chapters focus on energetic materials, polymers, bulk metal glasses, and the mathematics of shear banding as well as the numerical modeling of them. With its detailed coverage of the subject, this book is of great interest to academics and researchers into materials performance as well as professionals. - Up-to-date coverage of the subject and research that has occurred over the past 20 years - Each chapter is written on a different sub-field of adiabatic shear by an acknowledged expert in the field - Detailed and clear discussions of each aspect
Author: American Society of Civil Engineers
Publisher:
ISBN:
Category : Civil engineering
Languages : en
Pages : 1264
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Book Description
Vols. 29-30 contain papers of the International Engineering Congress, Chicago, 1893; v. 54, pts. A-F, papers of the International Engineering Congress, St. Louis, 1904.
