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Validating Numerical Simulation Of Soil Structure Interaction For Building On Liquefiable Deposits Using Centrifuge Experiments
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Book Synopsis Validating Numerical Simulation of Soil- Structure Interaction for Building on Liquefiable Deposits Using Centrifuge Experiments by : Ananth Balachandra
Download or read book Validating Numerical Simulation of Soil- Structure Interaction for Building on Liquefiable Deposits Using Centrifuge Experiments written by Ananth Balachandra and published by . This book was released on 2019 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing shift towards performance-based geotechnical earthquake engineering design requires an improved understanding of soil-structure interaction (SSI) for buildings on liquefiable deposits. While a number of authors have used centrifuge tests and numerical modelling to study this phenomena, a limited number of studies have been undertaken where numerical models have been validated against well-instrumented centrifuge tests. The focus of this research is to validate numerical simulations of ‘free-field’ conditions and numerical simulations of soil-structure interaction response of isolated buildings on liquefiable deposits against measurements from a centrifuge experiment. The 1D simulations for this study have been developed using the PM4Sand constitutive soil model as implemented in FLAC and the PDMY02 constitutive soil model as implemented in OpenSEES. The consideration of two soil models is one of the distinctive features of this study, as one of the objectives of this research is to compare the relative performance of the two constitutive soil models. The 2D numerical simulations to assess the soil-structure interaction response of isolated structures were developed using the PM4Sand constitutive soil model as implemented in FLAC. The 1D validation that was undertaken in this study show relatively good agreement between the simulated and measured accelerations and excess pore pressures using PM4Sand and PDMY02 for up to moderate levels of earthquake shaking. At high levels of earthquake shaking, good results were obtained using PM4Sand but a poor match with measured values was obtained using the PDMY02 model. The centrifuge experiment results appeared to show that the ground motion properties such as duration and the presence of ‘pulse-like’ qualities have an influence on the measured acceleration and excess pore pressure response even if the intensity of shaking is relatively similar. However, this distinction was generally not captured by the two constitutive soil models considered in this study. Additionally, both of the constitutive soil models significantly underestimated volumetric settlements in the ‘free-field’. The 2D validation undertaken in this study showed that, while the numerical simulations were not able to capture volumetric settlements well, the simulations using PM4Sand generally provided good estimates of total settlement of the structure. The numerical simulations also provided relatively comparable acceleration response in the soil beneath the structures and the ii acceleration response at the base and top of the structure. However, more variability between the measured and simulated excess pore pressure response in the liquefiable soils was noted. The research undertaken in this study shows that numerical simulations are generally able to capture important mechanisms due to liquefaction. In this study, a better response was obtained using the PM4Sand constitutive soil model when simulating ‘free-field’ conditions. However, it should be noted that this observation is based on comparisons against one centrifuge experiment and for the soil parameters adopted in this study.
Book Synopsis Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading by : Mourad Zeghal
Download or read book Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading written by Mourad Zeghal and published by . This book was released on 2020-10-09 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book presents work collected through the Liquefaction Experiments and Analysis Projects (LEAP) in 2017. It addresses the repeatability, variability, and sensitivity of lateral spreading observed in twenty-four centrifuge model tests on mildly sloping liquefiable sand. The centrifuge tests were conducted at nine different centrifuge facilities around the world. For the first time, a sufficient number of experiments were conducted to enable assessment of variability of centrifuge test results. The experimental data provided a unique basis for assessing the capabilities of twelve different simulation platforms for numerical simulation of soil liquefaction. The results of the experiments and the numerical simulations are presented and discussed in papers submitted by the project participants. The work presented in this book was followed by LEAP-Asia that included assessment of a generalized scaling law and culminated in a workshop in Osaka, Japan in March 2019. LEAP-2020, ongoing at the time of printing, is addressing the validation of soil-structure interaction analyses of retaining walls involving a liquefiable soil. A workshop is planned at RPI, USA in 2020. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.
Book Synopsis Proceedings of the 4th International Conference on Performance Based Design in Earthquake Geotechnical Engineering (Beijing 2022) by : Lanmin Wang
Download or read book Proceedings of the 4th International Conference on Performance Based Design in Earthquake Geotechnical Engineering (Beijing 2022) written by Lanmin Wang and published by Springer Nature. This book was released on 2022-09-19 with total page 2417 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 4th International Conference on Performance-based Design in Earthquake Geotechnical Engineering (PBD-IV) is held in Beijing, China. The PBD-IV Conference is organized under the auspices of the International Society of Soil Mechanics and Geotechnical Engineering - Technical Committee TC203 on Earthquake Geotechnical Engineering and Associated Problems (ISSMGE-TC203). The PBD-I, PBD-II, and PBD-III events in Japan (2009), Italy (2012), and Canada (2017) respectively, were highly successful events for the international earthquake geotechnical engineering community. The PBD events have been excellent companions to the International Conference on Earthquake Geotechnical Engineering (ICEGE) series that TC203 has held in Japan (1995), Portugal (1999), USA (2004), Greece (2007), Chile (2011), New Zealand (2015), and Italy (2019). The goal of PBD-IV is to provide an open forum for delegates to interact with their international colleagues and advance performance-based design research and practices for earthquake geotechnical engineering.
Book Synopsis Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading II by : Tetsuo Tobita
Download or read book Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading II written by Tetsuo Tobita and published by Springer Nature. This book was released on with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Soil-Foundation-Structure Interaction by : Rolando P. Orense
Download or read book Soil-Foundation-Structure Interaction written by Rolando P. Orense and published by CRC Press. This book was released on 2010-07-20 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil-Foundation-Structure Interaction contains selected papers presented at the International Workshop on Soil-Foundation-Structure Interaction held in Auckland, New Zealand from 26-27 November 2009. The workshop was the venue for an international exchange of ideas, disseminating information about experiments, numerical models and practical en
Book Synopsis Verification and Validation of Fully-coupled Modeling of Soil Liquefaction by : Panagiota Tasiopoulou
Download or read book Verification and Validation of Fully-coupled Modeling of Soil Liquefaction written by Panagiota Tasiopoulou and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil liquefaction and the transient response of the fully coupled soil skeleton -- pore fluid systems in general, have been a major area of interest and research for the geotechnical earthquake community. Numerical simulation and analysis of such problems have mainly been based on formulations assuming incompressibility of the pore fluid while neglecting its acceleration. This approach leads to the need of artificial damping (Rayleigh damping) and furthermore, it commonly faces issues like volumetric locking. Herein, a different generalized formulation, called u - p - U, has been numerically implemented intending to overcome the aforementioned weaknesses by approaching the physics of the porous media related problems in a more consistent way. This formulation takes into account the relative displacement of the fluid to the solid skeleton. The current study focuses on the verification and validation of this formulation, in order to obtain a deeper insight to the performance and versatility of its numerical implementation. Verification has been achieved through comparison with analytical solutions for elastic porous media existing in literature. Validation was conducted through the numerical simulation of a centrifuge test performed in the framework of VELACS project. Thus, the contribution of the present thesis is to provide to the geotechnical community with a powerful numerical tool for simulating liquefaction related phenomena. This numerical tool includes an advanced formulation and a rigorous sophisticated constitutive model in the framework of critical state theory. A major advantage of this u - p - U formulation, which has rarely been implemented before, is the fact that the damping is obtained through solid skeleton - fluid interaction. Thus, no Rayleigh damping is needed, in contrast to the widely so far used formulations. In addition, u - p - U formulation resolves the issue of volumetric locking, which is usually encountered in fully -- coupled numerical analyses. Furthermore, the material model used can capture efficiently the mechanisms of softening/hardening as well as dilating/contracting response of both loose and dense states of sands. The present study has verified and validated the aforementioned numerical code. Thus, the numerical code can be used for further research in the field of solid skeleton - fluid interaction, so that a better understanding and accurate prediction can be acquired for soil response due to liquefaction.
Book Synopsis Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions by : Francesco Silvestri
Download or read book Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions written by Francesco Silvestri and published by CRC Press. This book was released on 2019-07-19 with total page 8083 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Modeling of the Soil-structure Interaction: by : Todor Zhelyazov
Download or read book Modeling of the Soil-structure Interaction: written by Todor Zhelyazov and published by . This book was released on 2020 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited book provides discussion and presents results related to some "hot topics," all dealing with the soil-structure interaction. The book can be of interest to both scientists involved in academic studies of the problems addressed and for practitioners engaged in high-level design.Chapter I reports the investigation of non-stationary wave propagation in continuously inhomogeneous cylindrical elements (such as pipelines). New results obtained by numerical analysis of non-stationary wave propagation are presented. The cases studied comprise simulations of the propagations of both one-dimensional and two-dimensional non-stationary waves. Waves of the first type are supposed to propagate in continuously inhomogeneous, linearly viscoelastic cylinders, whereas waves of the second type propagate in continuously inhomogeneous elastic cylinders. The authors of this chapter apply an original research method consisting of the implementation of solutions to dynamic problems in the study of elastic and linearly viscoelastic piecewise homogeneous bodies.Chapter II outlines an analytical study of the propagation of different types of waves (plane, cylindrical, spherical) as well as of the waves' interaction with an element of Vibro-isolation (specifically, a three-layer plate). The author also presents the numerical results of the study of the distribution of the vibration accelerations in soil.Chapter III presents details on the analytical modeling of a bearing device for passive seismic isolation (friction-pendulum system). The behavior of the slider is identical to a motion of a particle constrained to slide on a spherical surface. The analytical model includes equations of motion, derived using the Lagrange formalism and constitutive equations of the sliding interface. The author presents the results of the numerical simulation of the response of the bearing device to a seismic event, assuming a constant value of the friction coefficient.Chapter IV proposes a discussion on the assessment of the load-carrying capacity of a metal-resin anchor and the determination of dependencies between parameters of supporting systems that include anchors. The solution to the problems addressed in this study involves an accurate analysis of the load transfer mechanisms between different system components. The proposed strategy requires the implementation of an algorithm aimed at the reconstruction of the analytical form of a function, provided its tabular form is available. The authors also formulate a theorem that postulates the existence of such representation applicable in a more general context.The research object in Chapter V is the formulation of the boundary value problems for circular and annular three-layer plates subjected to axisymmetric loading. The considered plates consist of three layers: two thin bearing layers and one filler layer, with a perfect bond, assumed for all interfaces. The definition of the stress-strain state in the plates presumes that the Kirchhoff's hypotheses regarding the bearing layers and the Timoshenko's hypothesis (i.e., linear distribution of the tangential displacements over the thickness) concerning the filler layer hold. The performed analyses take into account the characteristics of the elastic (Winkler) foundation. The authors provide the obtained analytical solutions to the formulated boundary value problems. Results obtained by numerical analysis of the stress and the strain distributions for plates supported by hinges on the contour are also presented.
Book Synopsis Centrifugal and Numerical Modeling of Buried Structures. Volume 1. Executive Summary by : Hon-Yim Ko
Download or read book Centrifugal and Numerical Modeling of Buried Structures. Volume 1. Executive Summary written by Hon-Yim Ko and published by . This book was released on 1987 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is an executive summary of the research project on centrifugal and numerical modeling of buried structures subjected to static and dynamic loadings on the ground surface. Techniques were developed for testing model buried pipes in a geotechnical centrifuge. An impact generator was developed for applying an airblast loading on the centrifuge model. A dynamic stress gage was developed for measuring the stresses generated in the soil and acting on the buried pipe during the airblast loading. Finite element analyses were performed on the buried pipe experiments. Comparison between centrifuge test data and analytical results is used to validate the numerical analysis procedure. Keywords: Soil-structure interaction; Centrifuge model testing; Static loading.
Book Synopsis Validation of Soil-structure Interaction Analysis Methods by : JiinSong Tsai
Download or read book Validation of Soil-structure Interaction Analysis Methods written by JiinSong Tsai and published by . This book was released on 1990 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamic Soil-structure Interaction by : John P. Wolf
Download or read book Dynamic Soil-structure Interaction written by John P. Wolf and published by Prentice Hall. This book was released on 1985 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Soil Dynamics and Earthquake Geotechnical Engineering by : Boominathan Adimoolam
Download or read book Soil Dynamics and Earthquake Geotechnical Engineering written by Boominathan Adimoolam and published by Springer. This book was released on 2018-06-09 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers selected proceedings of the annual conference of the Indian Geotechnical Society, and covers various aspects of soil dynamics and earthquake geotechnical engineering. The book includes a wide range of studies on seismic response of dams, foundation-soil systems, natural and man-made slopes, reinforced-earth walls, base isolation systems and so on, especially focusing on the soil dynamics and case studies from the Indian subcontinent. The book also includes chapters addressing related issues such as landslide risk assessments, liquefaction mitigation, dynamic analysis of mechanized tunneling, and advanced seismic soil-structure-interaction analysis. Given its breadth of coverage, the book offers a useful guide for researchers and practicing civil engineers alike.
Book Synopsis Soil-structure Interaction Modeling Using Equivalent Linear Soil Behavior in the Substructure Method by : Dimitris Pitilakis
Download or read book Soil-structure Interaction Modeling Using Equivalent Linear Soil Behavior in the Substructure Method written by Dimitris Pitilakis and published by . This book was released on 2006 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical procedure, coded into a numerical code (MISS3D-EqL), is developed to accommodate for the effects of the nonlinear soil behavior on the soil-structure interaction (SSI) using an equivalent linear approach. Equivalent linear behavior is assumed for the soil, while the response of the structure to the ground shaking and its effects on the soil are properly taken into account using the substructure method. The proposed procedure is validated against other numerical software and experimental means, such as shaking table and centrifuge tests. The effects of the equivalent linear soil behavior on the soil-structure system response are clearly demonstrated by analyses of representative case studies. A recursive analysis of typical soil profiles and infrastructures is performed to reveal the further softening of the system and the increased energy dissipation, compared to the linear case, due to the equivalent linear soil behavior. Special emphasis is given to the estimation of the foundation dynamic impedance functions. Dynamic stiffness and radiation dashpot coefficients are estimated for typical footings resting on typical soil profiles with equivalent linear behavior. The effects of the nonlinear soil behavior on the dynamic coefficient are shown compared to the linear elastic case. The dynamic stiffness coefficient decreases with increasing input acceleration amplitude, with decreasing soil shear wave velocity and with decreasing soil shear modulus, while it depends on the frequency content of the earthquake. The radiation dashpot coefficient is unaffected by the nonlinear soil behavior for most practical applications.
Book Synopsis Modeling in Geotechnical Engineering by : Pijush Samui
Download or read book Modeling in Geotechnical Engineering written by Pijush Samui and published by Academic Press. This book was released on 2020-12-01 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modeling in Geotechnical Engineering is a one stop reference for a range of computational models, the theory explaining how they work, and case studies describing how to apply them. Drawing on the expertise of contributors from a range of disciplines including geomechanics, optimization, and computational engineering, this book provides an interdisciplinary guide to this subject which is suitable for readers from a range of backgrounds. Before tackling the computational approaches, a theoretical understanding of the physical systems is provided that helps readers to fully grasp the significance of the numerical methods. The various models are presented in detail, and advice is provided on how to select the correct model for your application. Provides detailed descriptions of different computational modelling methods for geotechnical applications, including the finite element method, the finite difference method, and the boundary element method Gives readers the latest advice on the use of big data analytics and artificial intelligence in geotechnical engineering Includes case studies to help readers apply the methods described in their own work
Book Synopsis Improved Numerical Procedures for Soil-structure Interaction Including Simulation of Construction Sequences by : John Gwin Lightner
Download or read book Improved Numerical Procedures for Soil-structure Interaction Including Simulation of Construction Sequences written by John Gwin Lightner and published by . This book was released on 1979 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Soil Structure Interaction by : John W. Bull
Download or read book Soil Structure Interaction written by John W. Bull and published by Elsevier Science & Technology. This book was released on 1994 with total page 727 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Society of Civil Engineers Publisher :Amer Society of Civil Engineers ISBN 13 :9780872625822 Total Pages :91 pages Book Rating :4.6/5 (258 download)
Book Synopsis Seismic Analysis of Safety-related Nuclear Structures, and Commentary on Standard for Seismic Analysis of Safety Related Nuclear Structures by : American Society of Civil Engineers
Download or read book Seismic Analysis of Safety-related Nuclear Structures, and Commentary on Standard for Seismic Analysis of Safety Related Nuclear Structures written by American Society of Civil Engineers and published by Amer Society of Civil Engineers. This book was released on 1987-01-01 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
