Download or read book Lateral Pile soil Interaction in Liquefiable Soils written by Suresh R. Dash and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design of Pile Foundations in Liquefiable Soils written by Gopal Madabhushi and published by Imperial College Press. This book was released on 2010 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pile foundations are the most common form of deep foundations that are used both onshore and offshore to transfer large superstructural loads into competent soil strata. This book provides many case histories of failure of pile foundations due to earthquake loading and soil liquefaction. Based on the observed case histories, the possible mechanisms of failure of the pile foundations are postulated. The book also deals with the additional loading attracted by piles in liquefiable soils due to lateral spreading of sloping ground. Recent research at Cambridge forms the backbone of this book with the design methodologies being developed directly based on quantified centrifuge test results and numerical analysis. The book provides designers and practicing civil engineers with a sound knowledge of pile behaviour in liquefiable soils and easy-to-use methods to design pile foundations in seismic regions. For graduate students and researchers, it brings together the latest research findings on pile foundations in a way that is relevant to geotechnical practice. Sample Chapter(s). Foreword (85 KB). Chapter 1: Performance of Pile Foundations (4,832 KB). Contents: Performance of Pile Foundations; Inertial and Kinematic Loading; Accounting for Axial Loading in Level Ground; Lateral Spreading of Sloping Ground; Axial Loading on Piles in Laterally Spreading Ground; Design Examples. Readership: Researchers, academics, designers and graduate students in earthquake engineering, civil engineering and ocean/coastal engineering.

Download or read book Lateral Response of Piles in Saturated Cohesionless Soils written by Peter James Algie and published by . This book was released on 2012 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the lateral response of single piles embedded in saturated cohesionless soils on flat ground, with no crust layer. OpenSeesPL, a numerical modelling software programme, was used as the principal means of this investigation. Several 'rules of thumb' that could be used in pseudo-static methods were developed. Soil-pile interaction in saturated cohesionless soils is a changing and multi-variable problem, and therefore is not well understood. This is because the soil is prone to liquefaction when subject to dynamic loads. These variables include changing soil stiffness and damping, changing soil-pile-structure resonant frequency and changing loads. The response of piles subject to lateral static pushover loads was considered. OpenSeesPL and an elastic continuum pile analysis method proposed by Budhu and Davies (1987) can predict lateral pile response reasonably accurately. Initial soil stiffness equal to approximately 1/3 to 1/4 of the small strain moduli should be used. The friction angle in both analysis methods has to account for strain softening beyond peak resistance in dense sands. Pile response subject to lateral dynamic loads at the pile head was analysed. It was found that piles dynamically loaded at the pile head can lead to the adjacent soil liquefying, which reduces the soil stiffness and increases the strain dependent material damping. Nonlinear OpenSeesPL models and an inertial pseudo-static method along with the Budhu and Davies method for elastic soils with appropriate reductions in soil stiffness can be used to reasonably predict the response of piles dynamically excited at the pile head. The lateral response of piles subject to dynamic excitation of the underlying bedrock was investigated. Maximum ground surface accelerations and pile response in liquefiable soils was found to occur during an initial transient phase before the onset of full liquefaction. During this phase, the soil has a linear stiffness distribution with depth and the soil stiffness near the ground surface (i.e. at one pile diameter) is equal to approximately 20% of the initial stiffness at that depth. An elastic equivalent pseudo- static method for determining lateral pile response subject to kinematic and inertial interaction was developed.

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.

Download or read book Design of Pile Foundations in Liquefiable Soils written by Gopal Madabhushi and published by World Scientific. This book was released on 2010 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pile foundations are the most common form of deep foundations that are used both onshore and offshore to transfer large superstructural loads into competent soil strata. This book provides many case histories of failure of pile foundations due to earthquake loading and soil liquefaction. Based on the observed case histories, the possible mechanisms of failure of the pile foundations are postulated. The book also deals with the additional loading attracted by piles in liquefiable soils due to lateral spreading of sloping ground. Recent research at Cambridge forms the backbone of this book with the design methodologies being developed directly based on quantified centrifuge test results and numerical analysis.The book provides designers and practicing civil engineers with a sound knowledge of pile behaviour in liquefiable soils and easy-to-use methods to design pile foundations in seismic regions. For graduate students and researchers, it brings together the latest research findings on pile foundations in a way that is relevant to geotechnical practice.

Download or read book Soil pile Interaction During Liquefaction induced Lateral Spread written by Siang Huat Goh and published by . This book was released on 2001 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pile Response to Liquefaction induced Lateral Spread written by Wolfgang Daniel Meyersohn and published by . This book was released on 1994 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Liquefaction and Lateral Soil Movement Effects on Piles written by Debanik Chaudhuri and published by . This book was released on 1998 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soil structure Interaction in Laterally Loaded Piles written by Mohamed Nabeel Abdel-Salam and published by . This book was released on 1979 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influence of Soil Permeability on Liquefaction induced Lateral Pile Response written by Jose Manuel Ramirez and published by . This book was released on 2010 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pile foundations have been significantly damaged by liquefaction-induced lateral spreading during earthquakes. There are large uncertainties regarding the effects of various soil properties on this pattern of soil-structure interaction. The main concern of this study is to numerically investigate the role of soil permeability in such lateral spreading scenarios. Through extensive calibration, finite element analysis models were developed in which the response reasonably matched experimental data from shake-table testing and centrifuge testing. The overall impact of permeability on the soil stratum and the pile response was similar for both situations. In most cases, soil displacement increased with increasing permeability, while pile load decreased.

Download or read book Numerical Study on the Seismic Behavior of Inclined Piles in Liquefiable Soils written by Yu Wang and published by . This book was released on 2021 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamic Pile Soil Interaction in Laterally Spreading Slopes written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The collapse of buildings and infrastructure is an unfortunate consequence of major earthquakes (e.g., the 1964 Alaskan earthquake, the 1995 Kobe earthquake in Japan and the 2007 Pisco earthquake in Peru). Liquefaction-induced lateral spreading is known to be one cause of severe damage to deep foundation systems. However, the dynamic soil-structure interaction between liquefied soil and piles is extremely complex and further work is required to define the appropriate design pressures and to understand the mechanisms at work. This thesis presents the findings of an experimental program carried out using the large geotechnical centrifuge at C-CORE in St John's Newfoundland, to investigate the mechanism of lateral spreading and its implications for dynamic soil-pile interaction. Soil and pile responses were measured using accelerometers, pore pressure transducers, and digital imaging using a high speed camera. Using these images, transient profiles of slope deformation were quantitatively measured using Particle Image Velocimetry (PIV). These tests illustrate the potential for earthquake shaking to excite the natural frequency of the liquefied soil column, which can lead to increased transient lateral pressures on piles in liquefiable ground. This study recommends that this potential for "auto tuning" should be anticipated in design and proposes a new limiting pseudo-static backbone p-y curve for use in the design of piles subjected to lateral spreading ground deformation.

Download or read book Seismic Performance and Simulation of Pile Foundations in Liquefied and Laterally Spreading Ground written by Ross W. Boulanger and published by . This book was released on 2006 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a workshop on Seismic Performance and Simulation of Pile Foundations in Liquefied and Laterally Spreading Ground, held in Davis, California, March 16-18, 2005. Sponsored by the Pacific Earthquake Engineering Research Center; University of California at Berkeley; Center for Urban Earthquake Engineering; Tokyo Institute of Technology; Geo-Institute of ASCE. This collection contains 25 papers that discuss physical measurements and observations from earthquake case histories, field tests in blast-liquefied ground, dynamic centrifuge model studies, and large-scale shaking table studies. Papers contain recent findings on fundamental soil-pile interaction mechanisms, numerical analysis methods, and reviews and evaluations of existing and emerging design methodologies. This proceeding provides comprehensive coverage of a major issue in earthquake engineering practice and hazard mitigation efforts.

Download or read book Geotechnical Centrifuge Technology written by R.N. Taylor and published by CRC Press. This book was released on 2003-09-02 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a thorough review of this powerful and sophisticated technique for modelling soil structure interactions. It has been written by an international team of authors.

Download or read book Nonlinear Behavior and Modeling of Piles in Partially Liquefied and Layered Soil Conditions written by Barbara Jean Chang and published by . This book was released on 2011 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: Saturated soils, particularly cohesionless soils, may liquefy when subjected to earthquake excitation, resulting in reductions in strength and stiffness of the soil. The consequences have shown to be devastating to foundations in past earthquakes. For pile foundations, a reduction of vertical or lateral soil resistance may cause failure of the super structure. To study this issue, two unique 1-g soil-pile tests were conducted. The models were constructed in a laminar soil box which was subsequently placed on a uniaxial shake table. One experiment focused on characterizing the soil resistance of partially liquefied soil, while the other on multi-layered soil and the effect of its movement and load demands on the nonlinear behavior of piles. These two different experimental configurations illustrate scenarios commonly observed in the field, where the behavior of the soil and the pile merit further investigation. While evidence in the literature indicates that the lateral soil ("p-y") resistance of piles in liquefiable soils is significantly reduced, the shape and amplitude of the reduced p-y curve during pore pressure build-up is not well understood. To investigate this, a single steel pile embedded in homogeneous saturated Nevada sand was subjected to sequential dynamic shaking and lateral inertial equivalent loading. A key goal in the test program was to develop a data set capable of rendering insight into the characteristics of p-y resistance under developing and partial liquefied soil conditions. Test data were used to back-calculate p-y resistance curves for partially liquefied soils. These curves are subsequently adopted in a numerical study of the behavior of piles in partially liquefied soils considering different layering conditions. In contrast, in a multi-layered soil profile, if a loose layer liquefies, large localized plastic demands may be generated in the piles. In the case of concrete piles, these demands manifest flexural cracks in the concrete, which weakens the pile and exposes it to subsequent environmental degradation. During the experiments conducted herein to study this issue, plastic demands in the pile were characterized using curvature profiles coupled with back-calculation of the plastic hinge length and post-test physical observations. Numerical modeling studies demonstrate the applicability of current design-oriented tools to capture these key response parameters needed for design.

Download or read book Analysis of Pile Foundations Subject to Static and Dynamic Loading written by Amir M. Kaynia and published by CRC Press. This book was released on 2021-08-30 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book State of the Art and Practice in the Assessment of Earthquake Induced Soil Liquefaction and Its Consequences written by National Academies of Sciences, Engineering, and Medicine and published by . This book was released on 2019-01-30 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthquake-induced soil liquefaction (liquefaction) is a leading cause of earthquake damage worldwide. Liquefaction is often described in the literature as the phenomena of seismic generation of excess porewater pressures and consequent softening of granular soils. Many regions in the United States have been witness to liquefaction and its consequences, not just those in the west that people associate with earthquake hazards. Past damage and destruction caused by liquefaction underline the importance of accurate assessments of where liquefaction is likely and of what the consequences of liquefaction may be. Such assessments are needed to protect life and safety and to mitigate economic, environmental, and societal impacts of liquefaction in a cost-effective manner. Assessment methods exist, but methods to assess the potential for liquefaction triggering are more mature than are those to predict liquefaction consequences, and the earthquake engineering community wrestles with the differences among the various assessment methods for both liquefaction triggering and consequences. State of the Art and Practice in the Assessment of Earthquake-Induced Soil Liquefaction and Its Consequences evaluates these various methods, focusing on those developed within the past 20 years, and recommends strategies to minimize uncertainties in the short term and to develop improved methods to assess liquefaction and its consequences in the long term. This report represents a first attempt within the geotechnical earthquake engineering community to consider, in such a manner, the various methods to assess liquefaction consequences.