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Empirical Evaluation Of Inertial Soil Structure Interaction Effects
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Book Synopsis Empirical Evaluation of Inertial Soil-structure Interaction Effects by : Jonathan P. Stewart
Download or read book Empirical Evaluation of Inertial Soil-structure Interaction Effects written by Jonathan P. Stewart and published by . This book was released on 1998 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamic Soil-structure Interaction of Instrumented Buildings and Test Structures by : Michael James Givens
Download or read book Dynamic Soil-structure Interaction of Instrumented Buildings and Test Structures written by Michael James Givens and published by . This book was released on 2013 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of soil-structure interaction (SSI) are investigated through careful interpretation of available data from instrumented buildings and recently performed forced vibration experiments on instrumented buildings and test structures. Conventional engineering practice typically ignores soil-structure interaction (SSI) during evaluation of the seismic demand on buildings based on the perception that consideration of SSI will reduce demands on structures and ignoring SSI effects will cause seismic demands to be conservatively biased. I show that it is not always conservative to ignore SSI effects. Analysis of field performance data is undertaken to provide deeper insights into SSI phenomena ranging from kinematic effects on foundation ground motions to mobilized foundation stiffness and damping across a wide range of frequencies and loading levels. These data are interpreted to evaluate strengths and limitations of engineering analysis procedures for SSI. Foundation damping incorporates the combined effects of energy loss due to waves propagating away from the vibrating foundation in translational and rotational modes (radiation damping), as well as hysteretic action in the soil (material damping). Previous foundation damping models were developed for rigid circular foundations on homogenous halfspace and were often expressed using confusing or incomplete functions. Starting from first principles, we derive fundamental expressions for foundation damping in which foundation impedance components representing radiation damping and the soil hysteretic damping ratio appear as variables, providing maximum flexibility to the analyst. We utilize these general expressions with impedance solutions for rectangular-footprint foundations to: (1) compare predicted foundation damping levels with those from field case histories and (2) develop new foundation damping relationships for application in the building code (NEHRP Provisions). Ground motions at the foundation levels of structures differ from those in the free-field as a result of inertial and kinematic interaction effects. Inertial interaction effects tend to produce narrow-banded ground motion modification near the fundamental period of the soil-structure system, whereas kinematic effects are relatively broad-banded but most significant at high frequencies. Kinematic interaction effects can be predicted using relatively costly finite element analyses with incoherent input or simplified models. The simplified models are semi-empirical in nature and derived from California data. These simplified models are the basis for seismic design guidelines used in the western United States, such as ASCE-41 and NIST (2012). We compile some available data from building and ground instrumentation arrays in Japan for comparison to these two sets of models. We demonstrate that the model predictions for the sites under consideration are very similar to each other for modest foundation sizes (equivalent radii under about 50 m). However, the data show that both approaches overestimate the transfer function ordinates relative to those from a subset of the Japanese buildings having pile foundations. The misfit occurs at frequencies higher than the first-mode resonant frequency and appears to result from pile effects on kinematic interaction that are not accounted for in current models. A complete model of a soil-foundation-structure system for use in response history analysis requires modification of input motions relative to those in the free-field to account for kinematic interaction effects, foundation springs and dashpots to represent foundation-soil impedance, and a structural model. The recently completed NIST (2012) report developed consistent guidelines for evaluation of kinematic interaction effects and foundation impedance for realistic conditions. We implement those procedures in seismic response history analyses for two instrumented buildings in California, one a 13-story concrete-moment frame building with two levels of basement and the other a 10-story concrete shear wall core building without embedment. We develop three-dimensional baseline models (MB) of the building and foundation systems (including SSI components) that are calibrated to reproduce observed responses from recorded earthquakes. SSI components considered in the MB model include horizontal and vertical springs and dashpots that represent the horizontal translation and rotational impedance, kinematic ground motion variations from embedment and base slab averaging, and ground motion variations over the embedment depth of basements. We then remove selected components of the MB models one at a time to evaluate their impact on engineering demand parameters (EDPs) such as inter-story drifts, story shear distributions, and floor accelerations. We find that a "bathtub" model that retains all features of the MB approach except for depth-variable motions provides for generally good above-ground superstructure responses, but biased demand assessments in subterranean levels. Other common approaches using a fixed-based representation can produce poor results. To expand the data inventory of response histories to evaluate SSI, we performed forced vibration testing of a well-instrumented steel and reinforced concrete structure that has removable bracing. The testing was performed at three sites with varying soil conditions. I describe testing at one of the sites located in Garner Valley, California. During testing at this site an adjacent structure and local concrete slab were also instrumented in addition to the test structure. I describe the testing setup, schemes, instrumentation, and data processing techniques. The data are analyzed to evaluate the stiffness and damping associated with the foundation-soil interaction, revealing linear-elastic behavior at low forcing levels characterized by smaller stiffnesses and both lower and higher damping than is predicted by classical models. Nonlinear behavior at stronger shaking levels includes pronounced reductions of stiffness and changes in damping. Interestingly, kinematic interaction effects observed on an adjacent slab excited principally by surface waves were of a similar character to expectations from analytical models for body wave excitation from earthquakes. If verified, these results could lead to site- and foundation-specific test methods for evaluating kinematic interaction effects.
Book Synopsis Evaluation of Soil-structure Interaction Effects from Field Performance Data by : Salih Tileylioglu
Download or read book Evaluation of Soil-structure Interaction Effects from Field Performance Data written by Salih Tileylioglu and published by . This book was released on 2008 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Techniques for the Evaluation of Soil-structure Interaction Effects in the Time Domain by : Eduardo Bayo
Download or read book Numerical Techniques for the Evaluation of Soil-structure Interaction Effects in the Time Domain written by Eduardo Bayo and published by . This book was released on 1983 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coupled Site and Soil-Structure Interaction Effects with Application to Seismic Risk Mitigation by : Tom Schanz
Download or read book Coupled Site and Soil-Structure Interaction Effects with Application to Seismic Risk Mitigation written by Tom Schanz and published by Springer Science & Business Media. This book was released on 2009-06-18 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Research Workshop on Coupled Site and Soil-Structure Interaction Effects with Application to Seismic Risk Mitigation Borovets, Bulgaria 30 August - 3 September 2008
Book Synopsis Developments in Dynamic Soil-Structure Interaction by : Polat Gülkan
Download or read book Developments in Dynamic Soil-Structure Interaction written by Polat Gülkan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the last couple of decades it has been recognized that the foundation material on which a structure is constructed may interact dynamically with the structure during its response to dynamic excitation to the extent that the stresses and deflections in the system are modified from the values that would have been developed if it had been on a rigid foundation. This phenomenon is examined in detail in the book. The basic solutions are examined in time and frequency domains and finite element and boundary element solutions compared. Experimental investigations aimed at correlation and verification with theory are described in detail. A wide variety of SSI problems may be formulated and solved approximately using simplified models in lieu of rigorous procedures; the book gives a good overview of these methods. A feature which often lacks in other texts on the subject is the way in which dynamic behavior of soil can be modeled. Two contributors have addressed this problem from the computational and physical characterization viewpoints. The book illustrates practical areas with the analysis of tunnel linings and stiffness and damping of pile groups. Finally, design code provisions and derivation of design input motions complete this thorough overview of SSI in conventional engineering practice. Taken in its entirety the book, authored by fifteen well known experts, gives an in-depth review of soil-structure interaction across a broad spectrum of aspects usually not covered in a single volume. It should be a readily useable reference for the research worker as well as the advance level practitioner. (abstract) This book treats the dynamic soil-structure interaction phenomenon across a broad spectrum of aspects ranging from basic theory, simplified and rigorous solution techniques and their comparisons as well as successes in predicting experimentally recorded measurements. Dynamic soil behavior and practical problems are given thorough coverage. It is intended to serve both as a readily understandable reference work for the researcher and the advanced-level practitioner.
Book Synopsis Numerical Technique for the Evaluation of Soil Structure Interaction Effects in the Time Domain by : Eduardo Bayo
Download or read book Numerical Technique for the Evaluation of Soil Structure Interaction Effects in the Time Domain written by Eduardo Bayo and published by . This book was released on 1983 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Empirical Assessment of Soil-structure Interaction Effects on the Seismic Response of Structures by : Jonathan P. Stewart
Download or read book An Empirical Assessment of Soil-structure Interaction Effects on the Seismic Response of Structures written by Jonathan P. Stewart and published by . This book was released on 1996 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis and Computation of Seismic Soil Structure Interaction Effects by : Cassandra Lynn Batchelor
Download or read book Analysis and Computation of Seismic Soil Structure Interaction Effects written by Cassandra Lynn Batchelor and published by . This book was released on 1995 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Stanford University. Department of Civil Engineering. Blume Earthquake Engineering Center Publisher : ISBN 13 : Total Pages :104 pages Book Rating :4.F/5 ( download)
Book Synopsis Methodology for Nonlinear Soil-structure Interaction Effects Using Time-domain Analysis Techniques by : Stanford University. Department of Civil Engineering. Blume Earthquake Engineering Center
Download or read book Methodology for Nonlinear Soil-structure Interaction Effects Using Time-domain Analysis Techniques written by Stanford University. Department of Civil Engineering. Blume Earthquake Engineering Center and published by . This book was released on 1991 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report written by and published by . This book was released on 2004 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Soil-structure Interaction Effects for Laterally Excited Liquid-tank System by :
Download or read book Soil-structure Interaction Effects for Laterally Excited Liquid-tank System written by and published by . This book was released on 1992 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following a brief review of the mechanical model for liquid-storage tanks which permits consideration of the effects of tank and ground flexibility, and lateral and rocking base excitations, the effects of both kinematic and inertia interaction effects on the response of the tank-liquid system are examined and elucidated. The free-field motion is defined by a power spectral density function and an incoherence function, which characterizes the spatial variability of the ground motion due to the vertically incident incoherence waves. The quantities examined are the ensemble means of the peak values of the response. The results are compared with those obtained for no soil-structure interaction and for kinematic interaction to elucidate the nature and relative importance of the two interactions. Only the impulsive actions are examined, the convective actions are for all practical purposes unaffected by both kinematic and inertia interactions. It is shown that the major reduction of the response is attributed to inertia interaction. 20 refs.
Book Synopsis Advancements in Geotechnical Engineering by : Meng-Chia Weng
Download or read book Advancements in Geotechnical Engineering written by Meng-Chia Weng and published by Springer Nature. This book was released on 2021-07-10 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: With increasing urbanization and development of society, advancement in geotechnical technologies is essential to the construction of infrastructures. Geotechnical Investigation is the first step of applying scientific methods and engineering principles to obtain solutions to civil engineering problems. The studies presented in this volume deal with the attempts made by scholars and engineers to address the latest development in geotechnical engineering such as characterization of geomaterials, slope stability, tunneling, mitigation of geohazards, and some other geotechnical issues that are quite relevant in today's world. This volume is based on contributions to the the GeoChina International Conference on Civil & Transportation Infrastructures: From Engineering to Smart & Green Life Cycle Solutions -- Nanchang, China, 2021.
Book Synopsis Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures by : George Deodatis
Download or read book Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures written by George Deodatis and published by CRC Press. This book was released on 2014-02-10 with total page 1112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures contains the plenary lectures and papers presented at the 11th International Conference on STRUCTURAL SAFETY AND RELIABILITY (ICOSSAR2013, New York, NY, USA, 16-20 June 2013), and covers major aspects of safety, reliability, risk and life-cycle performance of str
Book Synopsis Dynamic Soil-structure Interaction by : Chuhan Zhang
Download or read book Dynamic Soil-structure Interaction written by Chuhan Zhang and published by Elsevier Science Limited. This book was released on 1998 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hardbound. Dynamic Soil-structure interaction is one of the major topics in earthquake engineering and soil dynamics since it is closely related to the safety evaluation of many important engineering projects, such as nuclear power plants, to resist earthquakes. In dealing with the analysis of dynamic soil-structure interactions, one of the most difficult tasks is the modeling of unbounded media. To solve this problem, many numerical methods and techniques have been developed. This book summarizes the most recent developments and applications in the field of dynamic soil-structure interaction, both in China and Switzerland.An excellent book for scientists and engineers in civil engineering, structural engineering, geotechnical engineering and earthquake engineering.
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 Smart Structures by : Franklin Y. Cheng
Download or read book Smart Structures written by Franklin Y. Cheng and published by CRC Press. This book was released on 2008-02-25 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: An innovative concept, smart structural systems have proven to be extremely effective in absorbing damaging energy and/or counteracting potentially devastating force, thus limiting structural collapse and subsequent injury. As this technology rapidly evolves, there is an ever-increasing need for an authoritative reference that will allow those in t