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Seismic response of tall building considering soil-pile-structure interaction

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Earthquake Engineering and Engineering Vibration 2002年第1期1卷 57-64页

作者： Han Yingcai Fluor Canada Ltd.,Calgary,AB,Canada Ph.D.,Principal Engineering Specialist Fluor Canada Ltd. Calgary Canada

The seismic behavior of tall buildings can he greatly affected by non-linear soil-pile interaction during strong *** this study a 20-storey building is examined as a typical structure supported on a pile foundation for different conditions:(1) rigid base,*** deformation in the foundation:(2) linear soil-pile system;and (3) nonlinear soil-pile system. The effects of pile foundation displacements on the behavior of tall building are investigated,and compared with the behavior of buildings supported on shallow *** a model of non-reflective boundary between the near field and far field, Novak's method of soil-pile interaction is *** computation method for vibration of pile foundations and DYNAN computer program are introduced comprehensively.A series of dynamic experiments have been done on full-scale piles, including single pile and group,linear vibration and nonlinear vibration,to verify the validity of boundary zone model.

关键词： dynamic soil-pile-structure interaction soil dynamics structural dynamics nonlinear vibration seismic response of tall building

ELASTOPLASTIC MODEL DESCRIBING CYCLIC CREEPING BEHAVIOUR OF SOFT CLAYS

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Acta Mechanica Sinica 1993年第1期9卷 80-85页

作者：王建华贾有权 Tianjin University Tianjin China 300072

The elastoplastic model in the deviatoric stress space is constructed to describe the cyclic undrained creeping behaviour of soft clays under cyclic stress by using Mises yield criterion and the concept of a field of hardening moduli. Furthermore, the effect of model parameters on the deformation is studied, and a method is given to determine quantitatively model parameters from results of cyclic triaxial tests of the saturated soft clay.

关键词： constitutive model plasticity soil dynamics

Pseudo-Static Elasto-Plastic Cyclic Creep Model and Cyclic Stability of Offshore Soft Foundation

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China Ocean Engineering 1999年第3期14卷 247-256页

作者：王建华刘振纹秦崇仁 Hydraulic Engineering Department Civil School Tianjin University Tianjin 300072 China

The accumulative shear deformation of soft clays under cyclic loads is considered as pseudo-static creep. A pseudo-static elasto-plastic cyclic creep model is developed based on the visco-elasto-plastic theory. The parameters in the model are determined by cyclic triaxial soil tests. A method for analyzing the stability of offshore soft foundation under wave loads is given by combining the model with pseudo-static creep analysis. An example is analyzed by the method. The results show that the horizontal and vertical stability of foundations under wave loads can be analyzed by it and the analytical results are qualitatively consistent with the observed failure modes of shallow foundations.

关键词： cyclic stability of soft foundation soft constitutive cyclic constitutive relation of soft soils offshore engineering soil dynamics

Identification and imaging of soil and soil-pile deformation in the presence of liquefaction

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Earthquake Engineering and Engineering Vibration 2006年第2期5卷 171-182页

作者： M. Zeghal P. V. Kallou C. Oskay T. Abdoun M. K. Sharp Dept. of Civ.and Env. Engrg. Rensselar Polytechnic Institute Troy NY l2l80 USA Mueser Rutledge Consulting Engineers 225 W 34th Street New York NY 10122 USA Engineer Dept. of Civ. and Env. Engrg. Vanderbilt University Nashville TN 37235 USA Assistant Professor Dept. of Civ.and Env. Engrg. Rensselar Polytechnic Institute Troy NY l2l80 USA Associate Professor Centrifuge Research & Development Center Vicksburg MS 39180 USA Director

A simple identification technique is developed to visualize the dynamic deformation mechanisms of centrifuge models of saturated soil and soil-pile systems using the measurements provided by sparsely distributed sensors. Crosscorrelation analyses are employed first to assess the variation of shear wave velocity profile with time as soil experiences stiffness reduction and degradation during dynamic excitations. The corresponding time-dependent modal configurations are determined using the finite-element technique. These configurations are used along with recorded motions to evaluate optimal time histories of displacement and strain fields based on a spectral motion reconstruction. Visualizations of the response of infinite slope and soil-pile centrifuge models revealed salient and complex multi-dimensional deformation patterns, especially at high pore pressure ratios. The developed technique provides an effective tool to visualize and analyze the dynamic response of centrifuge, shake-table and field soil systems.

关键词： soil dynamics liquefaction visualization centrifuge model

Estimation of Undrained Bearing Capacity for Offshore Soft Foundations with Cyclic Load

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China Ocean Engineering 1998年第2期13卷 213-222页

作者： Wang, JH Liu, YF Xing, Y Di, HM Tianjin Univ Civil Sch Geotech Engn Inst Tianjin 300072 Peoples R China Offshore Oil Engn Design Corp China Beijing Peoples R China

The degradation strength of soils under cyclic loading is studied and a method for determining the cyclic degradation strength with cyclic triaxial tests is given in the paper. Furthermore, a dum my static method for estimating the undrained bearing capacity for offshore soft foundation under wave loads is developed. It can consider the effect of the difference of cyclic stress for different parts of the foundation on both the degradation strength of the foundation soil and the bearing capacity so that the estimated result can better reflect the real condition of foundation under cyclic loading. The method can be applied to plane and space problem.

关键词： offshore engineering soft foundation soil dynamics bearing capacity cyclic load

PROPAGATION OF ELASTIC WAVES IN WATER-SATURATED soilS

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Acta Mechanica Sinica 1987年第1期3卷 92-100页

作者： Chen Longzhu Wu Shiming Zeng Guoxi (Zhejiang University) Zhejiang University China

A brief review of the literatures on the titled subject is given.A set of wave equations,taking the inertial coupling effect between soil skeleton and pore water into account,are established forsaturated *** preliminary analysis shows that the nature of wave propagation is mainly influencedby permeability coefficient,*** are three types of waves,two (P-and S-wave) propagating throughsoil skeleton and one(P-wave) through pore *** a soil with large value of k,compression wavevelocity through pore water will be greater than that through single-phased water,and as k→∞,theformer could be 31/2times as great as the *** a soil with extremely low permeability,thecompression wave velocity could be either less or greater than that through single-phased water,depend-ing on the rigidity of the soil passing *** phenomena observed from tests presented in theliterature may be reasonably explained by the proposed theory herein,and thus more reliable parametersof soil could be obtained from wave velocity *** studies on this subject are stillneeded.

关键词： soil dynamics elastic wave equations water-saturated softs inertial coupling effect wave velocity

Frequency Analysis of Heavy Tamping Vibration

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Journal of China University of Geosciences 2001年第2期12卷 150-154页

作者： Sun Jinzhong College of Engineering and Technology, China University of Geosciences, Beijing 100083 Tan Hanhua Guizhou Institute of Communication Design, Guiyang 550001 Qi Shengwen Institute of Geology, Chinese Academy of Sciences, Beijing 10002 College of Engineering and Technology China University of Geosciences Guizhou Institute of Communication Design Institute of Geology Chinese Academy of Sciences

Heavy tamping is one of the important methods for ground treatment. But the vibration is often a problem that restricts the application during heavy tamping. On the other hand, as an instant impact load with controllable energy, heavy tamping is a good test in situ for the study of soil dynamics. With the analysis in the field of frequency, deductive method for medium effecting function and excitation function of heavy tamping is put forward in this paper.

关键词： heavy tamping vibration soil dynamics medium effecting function excitation function of heavy tamping.

Numerical analysis of the interaction of soil-structure under earthquake loading

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Acta Seismologica Sinica(English Edition) 1997年第4期10卷 63-69页

作者：章根德宁书成

In this paper, the dynamical response of soil structure coupled system was studied by the continuum theory of soild fluid mixtures, the building foundation system subjected to rapid earthquake excitation were calculated by using finite element *** the results, the deformation patterns and corresponding contour diagrams of pore pressure at various time levels are given, time variations of displacement in a certain node and shear stress in a certain element are also presented. The results of this study have provided an improved understanding of coupled behaviour of porous media. The procedure developed in this paper can be effectively used under a wide range of loading conditions from very slow quasi static to very rapid earthquake excitations.

关键词： soil dynamics soil structure interaction earthquake response