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Title:Random Vibration of Nonlinear Building-Foundation Systems
Author(s):Chu, C-T.; Wen, Y.K.; Ang, A.H-S.
Subject(s):Earthquake engineering
Dynamic response
earthquake motions
Abstract:A method is presented for evaluating the effect of soil-structure interaction on the dynamic response of nonlinear building-foundation syste~s subjected to random seismic excitations. Uncertainties in the building-foundation system and loading are summarized and included in the evaluation of the overall structural reliability. The subsystem approach is adopted to model a soil-structure system. The superstructure is modeled as a shear-beam; the substructure is considered as a surface foundation on a half space. The nonlinear behavior in the coupled system is associated with the material nonlinearity in the structure and soil deposit, as well as the geometric nonlinearity caused by foundation uplifting. A smooth hysteretic model is used to represent the nonlinear behavior in the substructure as well as in the superstructure. For a structure with a large number of degrees of freedom, a DOF-reduction technique can be used to simplify the analysis. For structural reliability evaluation, the uncertainties in the dynamic modeling, the parameters of the coupled system, and the ground motion are also included. Using the available seismic hazard model, the lifetime safety of a building-foundation system can be evaluated.
Issue Date:1985-02
Publisher:University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report:Civil Engineering Studies SRS-517
Genre:Technical Report
Sponsor:National Science Foundation Grants CEE 80-02584 and CEE 82-13729
Date Available in IDEALS:2009-10-30
Identifier in Online Catalog:949024

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