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Author : Liangcai He
Publisher :
ISBN 13 :
Total Pages : 418 pages
Book Rating : 4.:/5 (318 download)
Download or read book Parallel Finite Element Modeling of Earthquake Liquefaction Response written by Liangcai He and published by . This book was released on 2006 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jinchi Lu
Publisher :
ISBN 13 :
Total Pages : 359 pages
Book Rating : 4.:/5 (76 download)
Download or read book Parallel Finite Element Modeling of Earthquake Ground Response and Liquefaction written by Jinchi Lu and published by . This book was released on 2006 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: Parallel computing is gradually becoming a main stream tool in geotechnical simulations. The need for high fidelity and for modeling of fairly large 3-dimensional (3D) spatial configurations is motivating this direction of research. The main objective of this thesis is to develop a state-of-the-art nonlinear parallel finite element program for earthquake ground/structure response and liquefaction simulation. In the developed parallel code, ParCYCLIC, finite elements are employed within an incremental plasticity, coupled solid-fluid formulation. A constitutive model calibrated by physical tests represents the salient characteristics of sand liquefaction and associated accumulation of shear deformations. Key elements of the computational strategy employed in ParCYCLIC include the development of a parallel sparse direct solver, the deployment of an automatic domain decomposer, and the use of the Multilevel Nested Dissection algorithm for ordering of the finite element nodes. Conducted large-scale geotechnical simulations show that ParCYCLIC is efficiently scalable to a large number of processors. Calibrated FE simulations are increasingly providing a reliable environment for modeling liquefaction-induced ground deformation. Effects on foundations and super-structures may be assessed, and associated remediation techniques may be explored, within a unified framework. Current capabilities of such a FE framework are demonstrated via a series of 3-dimensional (3D) simulations. High-fidelity 3D numerical studies using ParCYCLIC are shown to provide more accurate results. Much time and effort is expended today in building an appropriate finite element mesh and associated data files. User-friendly interfaces can significantly alleviate this problem allowing for high efficiency and much increased confidence. Pre- and post processing interfaces are developed to facilitate use of otherwise computational environments with numerous (often vaguely defined) input parameters. User-friendly interfaces are useful not only for simple model simulations on single-processor computers but also for large-scale modeling on a parallel machine.
Author : Zhaohui Yang
Publisher :
ISBN 13 :
Total Pages : 286 pages
Book Rating : 4.:/5 (318 download)
Download or read book Numerical Modeling of Earthquake Site Response Including Dilation and Liquefaction written by Zhaohui Yang and published by . This book was released on 2000 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rui Wang
Publisher : Springer
ISBN 13 : 3662496631
Total Pages : 131 pages
Book Rating : 4.6/5 (624 download)
Download or read book Single Piles in Liquefiable Ground written by Rui Wang and published by Springer. This book was released on 2016-03-17 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis focuses on the seismic response of piles in liquefiable ground. It describes the design of a three-dimensional, unified plasticity model for large post-liquefaction shear deformation of sand, formulated and implemented for parallel computing. It also presents a three-dimensional, dynamic finite element analysis method for piles in liquefiable ground, developed on the basis of this model,. Employing a combination of case analysis, centrifuge shaking table experiments and numerical simulations using the proposed methods, it demonstrates the seismic response patterns of single piles in liquefiable ground. These include basic force-resistance mode, kinematic and inertial interaction coupling mechanism and major influence factors. It also discusses a beam on the nonlinear Winkler foundation (BNWF) solution and a modified neutral plane solution developed and validated using centrifuge experiments for piles in consolidating and reconsolidating ground. Lastly, it studies axial pile force and settlement during post-earthquake reconsolidation, showing pile axial force to be irrelevant in the reconsolidation process, while settlement is process dependent.
Author : Nozomu Yoshida
Publisher : Springer
ISBN 13 : 940179460X
Total Pages : 370 pages
Book Rating : 4.4/5 (17 download)
Download or read book Seismic Ground Response Analysis written by Nozomu Yoshida and published by Springer. This book was released on 2014-11-17 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents state-of-the-art information on seismic ground response analysis, and is not only very valuable and useful for practitioners but also for researchers. The topics covered are related to the stages of analysis: 1. Input parameter selection, by reviewing the in-situ and laboratory tests used to determine dynamic soil properties as well as the methods to compile and model the dynamic soil properties from literature;2. Input ground motion; 3. Theoretical background on the equations of motion and methods for solving them; 4. The mechanism of damping and how this is modeled in the equations of motions; 5. Detailed analysis and discussion of results of selected case studies which provide valuable information on the problem of seismic ground response analysis from both a theoretical and practical point of view.
Author : Nima Tafazzoli
Publisher :
ISBN 13 : 9781267663160
Total Pages : pages
Book Rating : 4.6/5 (631 download)
Download or read book Methods, Computational Platform, Verification, and Application of Earthquake-soil-structure-interaction Modeling and Simulation written by Nima Tafazzoli and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Seismic response of soil-structure systems has attracted significant attention for a long time. This is quite understandable with the size and the complexity of soil-structure systems. The focus of three important aspects of ESSI modeling could be on consistent following of input seismic energy and a number of energy dissipation mechanisms within the system, numerical techniquesused to simulate dynamics of ESSI, and influence of uncertainty of ESSI simulations. This dissertation is a contribution to development of one such tool called ESSI Simulator. The work is being done on extensive verified and validated suite for EESI Simulator. Verification and validation are important for high fidelity numerical predictions of behavior of complex systems. This simulator uses finite element method as a numerical tool to obtain solutions for large class of engineering problems such as liquefaction, earthquake-soil-structure-interaction, site effect, piles, pile group, probabilistic plasticity, stochastic elastic-plastic FEM, and detailed large scale parallel models. Response of full three-dimensional soil-structure-interaction simulation of complex structures is evaluated under the 3D wave propagation. Domain-Reduction-Method is used for applying the forces as a two-step procedure for dynamic analysis with the goal of reducing the large size computational domain. The issue of damping of the waves at the boundary of the finite element models is studied using different damping patterns. This is used at the layer of elements outside of the Domain-Reduction-Method zone in order to absorb the residual waves coming out of the boundary layer due to structural excitation. Extensive parametric study is done on dynamic soil-structure-interaction of a complex system and results of different cases in terms of soil strength and foundation embedment are compared. High efficiency set of constitutive models in terms of computational time are developed and implemented in ESSI Simulator. Efficiency is done based on simplifying the elastic-plastic stiffness tensor of the constitutive models. Almost in all the soil-structure systems, there are interface zones in contact with each other. These zones can get detached during the loading or can slip on each other. In this dissertation the frictional contact element is implemented in ESSI Simulator. Extended verification has been done on the implemented element. The interest here is the effect of slipping and gap opening at the interface of soil and concrete foundation on the soil-structure system behavior. In fact transferring the loads to structure is defined based on the contact areas which will affect the response of the system. The effect of gap openings and sliding at the interfaces are shown through application examples. In addition, dissipation of the seismic energy due to frictional sliding of the interface zones are studied. Application Programming Interface (API) and Domain Specific Language (DSL) are being developed to increase developer's and user's modeling and simulation capabilities. API describes software services developed by developers that are used by users. A domain-specific language (DSL) is a small language which usually focuses on a particular problem domain in software. In general DSL programs are translated to a common function or library which can be viewed as a tool to hide the details of the programming, and make it easier for the user to deal with the commands.
Author : M. Hori
Publisher : CRC Press
ISBN 13 : 1000615774
Total Pages : 192 pages
Book Rating : 4.0/5 (6 download)
Download or read book Integrated Earthquake Simulation written by M. Hori and published by CRC Press. This book was released on 2022-09-26 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrated earthquake simulation (IES) is a new method for evaluating earthquake hazards and disasters induced in cities and urban areas. It utilises a sequence of numerical simulations of such aspects as earthquake wave propagation, ground motion amplification, structural seismic response, and mass evacuation. This book covers the basics of numerical analysis methods of solving wave equations, analyzing structural responses, and developing agent models for mass evaluation, which are implemented in IES. IES makes use of Monte-Carlo simulation, which takes account of the effects of uncertainties related to earthquake scenarios and the modeling of structures both above and below ground, and facilitates a better estimate of overall earthquake and disaster hazard. It also presents the recent achievement of enhancing IES with high-performance computing capability that can make use of automated models which employ various numerical analysis methods. Detailed examples of IES for the Tokyo Metropolis Earthquake and the Nankai Trough Earthquake are given, which use large scale analysis models of actual cities and urban areas.
Author : A. H. Barbat
Publisher :
ISBN 13 :
Total Pages : 622 pages
Book Rating : 4.3/5 (91 download)
Download or read book Structural Response Computations in Earthquake Engineering written by A. H. Barbat and published by . This book was released on 1989 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Madhavi Latha Gali
Publisher : Springer Nature
ISBN 13 : 9811562334
Total Pages : 763 pages
Book Rating : 4.8/5 (115 download)
Download or read book Geohazards written by Madhavi Latha Gali and published by Springer Nature. This book was released on 2020-08-13 with total page 763 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume comprises select papers presented during the Indian Geotechnical Conference 2018. This volume discusses concepts of soil dynamics and studies related to earthquake geotechnical engineering, slope stability, and landslides. The papers presented in this volume analyze failures connected to geotechnical and geological origins to improve professional practice, codes of analysis and design. This volume will prove useful to researchers and practitioners alike.
Author : Giovanni B. Barla
Publisher :
ISBN 13 : 9788855528122
Total Pages : 754 pages
Book Rating : 4.5/5 (281 download)
Download or read book Prediction, Analysis and Design in Geomechanical Applications written by Giovanni B. Barla and published by . This book was released on 2005 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hong Hao
Publisher : CRC Press
ISBN 13 : 1351850202
Total Pages : 1935 pages
Book Rating : 4.3/5 (518 download)
Download or read book Mechanics of Structures and Materials XXIV written by Hong Hao and published by CRC Press. This book was released on 2019-08-08 with total page 1935 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanics of Structures and Materials: Advancements and Challenges is a collection of peer-reviewed papers presented at the 24th Australasian Conference on the Mechanics of Structures and Materials (ACMSM24, Curtin University, Perth, Western Australia, 6-9 December 2016). The contributions from academics, researchers and practising engineers from Australasian, Asia-pacific region and around the world, cover a wide range of topics, including: • Structural mechanics • Computational mechanics • Reinforced and prestressed concrete structures • Steel structures • Composite structures • Civil engineering materials • Fire engineering • Coastal and offshore structures • Dynamic analysis of structures • Structural health monitoring and damage identification • Structural reliability analysis and design • Structural optimization • Fracture and damage mechanics • Soil mechanics and foundation engineering • Pavement materials and technology • Shock and impact loading • Earthquake loading • Traffic and other man-made loadings • Wave and wind loading • Thermal effects • Design codes Mechanics of Structures and Materials: Advancements and Challenges will be of interest to academics and professionals involved in Structural Engineering and Materials Science.
Author : Yu Huang
Publisher : Springer
ISBN 13 : 9811043795
Total Pages : 180 pages
Book Rating : 4.8/5 (11 download)
Download or read book Hazard Analysis of Seismic Soil Liquefaction written by Yu Huang and published by Springer. This book was released on 2017-04-11 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents comprehensive hazard analysis methods for seismic soil liquefaction, providing an update on soil liquefaction by systematically reviewing the phenomenon’s occurrence since the beginning of this century. It also puts forward a range of advanced research methods including in-situ tests, laboratory studies, physical model tests, numerical simulation, and performance-based assessment. Recent seismic liquefaction-related damage to soils and foundations demonstrate the increasing need for the comprehensive hazard analysis of seismic soil liquefaction in order to mitigate this damage and protect human lives. As such the book addresses the comprehensive hazard analysis of seismic soil liquefaction, including factors such as macroscopic characteristics, evaluating the liquefaction potential, dynamic characteristics and deformation processes, providing reliable evaluation results for liquefaction potential and deformation in the context of risk assessment. “p>
Author : Long Chen
Publisher :
ISBN 13 :
Total Pages : 457 pages
Book Rating : 4.:/5 (126 download)
Download or read book Implementation, Verification, Validation, and Application of Two Constitutive Models for Earthquake Engineering Applications written by Long Chen and published by . This book was released on 2020 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: Human and economic losses caused by earthquake-induced soil liquefaction underscore the importance of assessing liquefaction hazards, both by determining whether a soil is likely to liquefy and by estimating consequences that these events may cause. Numerical simulations have proven to be useful for these purposes. Reliable numerical analysis requires constitutive models to represent the in-situ soil behavior as well as general loading and drainage conditions. In this context, the main objective of this research is to implement, verify, and validate two newly developed constitutive models, PM4Sand and PM4Silt (Boulanger and Ziotopoulou, 2017, 2018), in the finite element platform OpenSees (OpenSees, 2007). These models are developed for earthquake engineering applications and can achieve reasonable approximations of desired behavior including pore pressure generation and dissipation, limiting strains, and cyclic mobility with straightforward calibration process. The verification study compares the response of the same model implemented in three different frameworks, OpenSees, FLAC, and PLAXIS, using stress point, element model, and 1D analyses. The validation study demonstrates the models0́9 capability in capturing realistic soil behavior under different scenarios including case-histories and a large-scale shake table test. For further validation of PM4Sand, the second part of this dissertation concentrates on the contribution of the UW numerical simulation team to three recent LEAP workshops that have focused on validating constitutive models using high quality laboratory and centrifuge experiments. The simulated models include a constant slope subject to lateral spreading and a sheet pile retaining structure supporting liquefiable soils. Lastly, this dissertation addresses two case studies using PM4Sand and PM4Silt to shed light on their application for analyzing lateral spreading induced by liquefaction. The first case focuses on a typical highway bridge embankment and investigates the efficiency of different intensity measures for estimating lateral displacement. The second case focuses on a real case study that showed zero-displacement lateral spreading during a recent earthquake event due, possibly, to interbedded sand, silt, and clay deposits.
Author : Rolando P. Orense
Publisher : CRC Press
ISBN 13 : 1138026433
Total Pages : 282 pages
Book Rating : 4.1/5 (38 download)
Download or read book Soil Liquefaction during Recent Large-Scale Earthquakes written by Rolando P. Orense and published by CRC Press. This book was released on 2014-04-15 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil Liquefaction during Recent Large-Scale Earthquakes contains selected papers presented at the New Zealand – Japan Workshop on Soil Liquefaction during Recent Large-Scale Earthquakes (Auckland, New Zealand, 2-3 December 2013). The 2010-2011 Canterbury earthquakes in New Zealand and the 2011 off the Pacific Coast of Tohoku Earthquake in Japan have caused significant damage to many residential houses due to varying degrees of soil liquefaction over a very wide extent of urban areas unseen in past destructive earthquakes. While soil liquefaction occurred in naturally-sedimented soil formations in Christchurch, most of the areas which liquefied in Tokyo Bay area were reclaimed soil and artificial fill deposits, thus providing researchers with a wide range of soil deposits to characterize soil and site response to large-scale earthquake shaking. Although these earthquakes in New Zealand and Japan caused extensive damage to life and property, they also serve as an opportunity to understand better the response of soil and building foundations to such large-scale earthquake shaking. With the wealth of information obtained in the aftermath of both earthquakes, information-sharing and knowledge-exchange are vital in arriving at liquefaction-proof urban areas in both countries. Data regarding the observed damage to residential houses as well as the lessons learnt are essential for the rebuilding efforts in the coming years and in mitigating buildings located in regions with high liquefaction potential. As part of the MBIE-JSPS collaborative research programme, the Geomechanics Group of the University of Auckland and the Geotechnical Engineering Laboratory of the University of Tokyo co-hosted the workshop to bring together researchers to review the findings and observations from recent large-scale earthquakes related to soil liquefaction and discuss possible measures to mitigate future damage. Soil Liquefaction during Recent Large-Scale Earthquakes will be of great interest to researchers, academics, industry practitioners and other professionals involved in Earthquake Geotechnical Engineering, Foundation Engineering, Earthquake Engineering and Structural Dynamics.
Author : Michele Barbato
Publisher :
ISBN 13 :
Total Pages : 590 pages
Book Rating : 4.:/5 (182 download)
Download or read book Finite Element Response Sensitivity, Probabilistic Response and Reliability Analyses of Structural Systems with Applications to Earthquake Engineering written by Michele Barbato and published by . This book was released on 2007 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: The geometric, mechanical, material and loading parameters used to define the mechanics-based finite element (FE) models of structural systems as well as their seismic input are characterized by significant uncertainties. The rational treatment of uncertainties in computational mechanics has been the object of increasing attention in recent years. Modern design codes indirectly account for parameter and model uncertainties in order to ensure satisfactory designs. Thus, in addition to accurate deterministic models, methods are needed to propagate uncertainties from the parameters defining the FE model of a structure to the engineering demand parameters. FE response sensitivities (RSs) to both model and loading parameters represent an essential ingredient in studying this complex uncertainty propagation. New RS algorithms based on the Direct Differentiation Method (DDM) are derived and implemented in general-purpose nonlinear structural analysis frameworks. The use of the DDM is extended to (1) force-based frame elements, (2) steel-concrete composite structures, and (3) three-field mixed FEs. In addition, the effects on RS continuity of using smooth versus non-smooth material constitutive models are thoroughly examined. An efficient simulation technique for an existing fully non-stationary stochastic earthquake ground motion model is developed. The definition of non-geometric spectral characteristics is extended to general complex-valued non-stationary stochastic processes. Closed-form approximate solutions of the first-passage problem are developed for single- and multi-degree-of-freedom linear elastic systems. First-order second-moment approximations of the first- and second-order statistics of the response of linear/nonlinear structural systems with random/uncertain parameters and subjected to quasi-static and/or dynamic load(s) are computed efficiently using DDM-based FE RSs. The probability of a structural response quantity exceeding a specified threshold level is obtained by using the First-Order Reliability Method in conjunction with the DDM-based FE RSs in the search for the Design Point(s) (DP). A new method, referred to as Multidimensional Visualization in the Principal Planes, is developed to explore the geometry of limit-state surfaces near the DP(s) in reduced-spaces defined by planes of major principal curvatures at the DP. A new hybrid reliability analysis method (DP search - Response Surface - Importance Sampling) is developed and tested. Based on pushover and time history analyses, examples of both time-invariant and time-variant reliability analysis of structural systems are presented to illustrate the probabilistic methods developed.
Author : Jean-François Semblat
Publisher : Iuss Press
ISBN 13 :
Total Pages : 510 pages
Book Rating : 4.F/5 ( download)
Download or read book Waves and Vibrations in Soils written by Jean-François Semblat and published by Iuss Press. This book was released on 2009 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Muneo Hori
Publisher : World Scientific
ISBN 13 : 1848163991
Total Pages : 438 pages
Book Rating : 4.8/5 (481 download)
Download or read book Introduction to Computational Earthquake Engineering written by Muneo Hori and published by World Scientific. This book was released on 2011 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Computational Earthquake Engineering covers solid continuum mechanics, finite element method and stochastic modeling comprehensively, with the second and third chapters explaining the numerical simulation of strong ground motion and faulting, respectively. Stochastic modeling is used for uncertain underground structures, and advanced analytical methods for linear and non-linear stochastic models are presented. The verification of these methods by comparing the simulation results with observed data is then presented, and examples of numerical simulations which apply these methods to practical problems are generously provided. Furthermore three advanced topics of computational earthquake engineering are covered, detailing examples of applying computational science technology to earthquake engineering problems.
