Author: Alborz Ghofrani Publisher: ISBN: Category : Languages : en Pages : 367
Book Description
Problems in geotechnical earthquake engineering often involve complex geometries and boundary conditions prohibiting the use of simple models. Although very useful, empirical models are sometimes not applicable to the problem at hand and performing experimental tests is costly and difficult. Improvements in computer technology have made advanced numerical modeling an essential tool for analysis and design of systems in the field of geotechnical earthquake engineering. In this context, there is a need for a robust numerical framework capable of handling different aspects of the engineering problems in this field. In this study, several of these aspects for 3D dynamic finite element analysis of such engineering problems are addressed. Particularly, constitutive modeling of granular soil to capture liquefaction, and soil-pile interaction are considered and tools are developed and implemented in OpenSees to address the problem of bridge foundations subjected to liquefaction induced lateral spreading loads. Several 3D static, quasi-static and dynamic examples are included for verification and validation of the tools implemented as part of this research.
Author: Francesco Silvestri Publisher: CRC Press ISBN: 0429633505 Category : Technology & Engineering Languages : en Pages : 5946
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: Dipanjan Basu Publisher: Purdue University Press ISBN: 9781622601264 Category : Transportation Languages : en Pages : 152
Book Description
This report focuses on the development of a new method of analysis of laterally loaded piles embedded in a multi-layered soil deposit treated as a three-dimensional continuum. Assuming that soil behaves as a linear elastic material, the governing differential equations for the deflection of laterally loaded piles were obtained using energy principles and calculus of variations. The differential equations were solved using both the method of initial parameters and numerical techniques. Soil resistance, pile deflection, slope of the deflected pile, bending moment and shear force can be easily obtained at any depth along the entire pile length. The results of the analysis were in very good agreement with three-dimensional finite element analysis results. The analysis was further extended to account for soil nonlinearity. A few simple constitutive relationships that allow for modulus degradation with increasing strain were incorporated into the analysis. The interaction of piles in groups was also studied.
Author: Publisher: ISBN: Category : Languages : en Pages : 283
Book Description
A review of liquefaction-induced lateral spreading and its effects on pile foundations has been presented. A review of currently available methods of analysis for prediction of bending moments and deflections of a single pile subjected to lateral spreading has also been conducted. The methods included in this study are: (a) Deformation method, (b) Japanese Road Association (JRA) method, (c) Limit Equilibrium method, (d) Hybrid force-deformation imposed method, and (e) Finite element method. Numerical analyses were conducted on single piles subjected to lateral spreading, using ABAQUS, based on the first four methods indicated above. The numerical analyses involved three different soil-pile configurations: (a) a two-layer soil profile without a non-liquefiable soil crust, (b) a three-layer soil profile with a non-liquefiable soil crust underlain by liquefiable soil over a dense sand, and (c) a three-layer soil profile like that of case (b) with a lateral deformation constraint at the pile head. The results were compared with a limited number of centrifuge data on single piles. The purpose was to calibrate these methods and assess their ability to capture the measured moment and deflection responses of single piles. The limit equilibrium method and the deformation-imposed method predicted the centrifuge data very well. The JRA method overpredicted both moments and pile deflections by as much as four times. Based on deformation imposed method, parametric analyses were also conducted to study the influence of: (i) the crust thickness, (ii) the liquefied layer thickness, (iii) the non-liquefied bottom layer thickness, (iv) the pile diameter, and (v) the lateral pile head deflection constraint, on pile response subjected to lateral displacements induced by soil liquefaction. The effects of these parameters on single pile response are presented.
Author: Shanzhi Shu Publisher: Springer ISBN: 3319957740 Category : Science Languages : en Pages : 280
Book Description
This book contains research papers focusing on recent advances throughout the world in theories and technologies of geotechnical engineering and the relevant disciplines. Topics includes: numerical modeling, earthquake engineering, geomaterial application in soil improvement and geo-environmental engineering, foundation engineering, and geo-environmental engineering.. Papers were selected from the 5th GeoChina International Conference 2018 – Civil Infrastructures Confronting Severe Weathers and Climate Changes: From Failure to Sustainability, held on July 23 to 25, 2018 in HangZhou, China.
Author: Toyoaki Nogami Publisher: American Society of Civil Engineers ISBN: Category : Technology & Engineering Languages : en Pages : 160
Book Description
In recent years, major progress has been made in the understanding of dynamic soil-structure interaction, which often influences the behavior of civil engineering structures in or on the ground. These papers examine the physical and numerical modeling in dealing with dynamic soil-structure interaction in light of recent developments. Experimental studies that offer an opportunity to directly observe complex phenomena are examined in addition to analytical studies that offer a logistical consideration on the physical insight into behavior and rational analysis methods.
Author: Amir M. Kaynia Publisher: CRC Press ISBN: 1000398560 Category : Technology & Engineering Languages : en Pages : 366
Book Description
This book presents computational tools and design principles for piles used in a wide range of applications and for different loading conditions. The chapters provide a mixture of basic engineering solutions and latest research findings in a balanced manner. The chapters are written by world-renowned experts in the field. The materials are presented in a unified manner based on both simplified and rigorous numerical methods. The first four chapters present the basic elements and steps in analysis of piles under static and cyclic loading together with clear references to the appropriate design regulations in Eurocode 7 when relevant. The analysis techniques cover conventional code-based methods, solutions based on pile-soil interaction springs, and advanced 3D finite element methods. The applications range from conventional piles to large circular steel piles used as anchors or monopiles in offshore applications. Chapters 5 to 10 are devoted to dynamic and earthquake analyses and design. These chapters cover a range of solutions from dynamic pile-soil springs to elasto-dynamic solutions of large pile groups. Both linear and nonlinear soil behaviours are considered along with response due to dynamic loads and earthquake shaking including possible liquefaction. The book is unique in its unified treatment of the solutions used for static and dynamic analysis of piles with practical examples of application. The book is considered a valuable tool for practicing engineers, graduate students and researchers.
Author: Alborz Ghofrani
Author: Francesco Silvestri
Author: Wolfgang Daniel Meyersohn
Author: Dipanjan Basu
Author: 
Author: Liangcai He
Author: Shanzhi Shu
Author: Christopher R. McGann
Author: Toyoaki Nogami
Author: Amir M. Kaynia