Random Vibration of Nonlinear Building-Foundation Systems

Chu, C-T.; Wen, Y.K.; Ang, A.H-S.

Permalink

https://hdl.handle.net/2142/14135 Copy

Description

Title

Random Vibration of Nonlinear Building-Foundation Systems

Author(s)

• Chu, C-T.
• Wen, Y.K.
• Ang, A.H-S.

Issue Date

1985-02

Keyword(s)

• Earthquake engineering
• Dynamic response
• earthquake motions
• hysteresis

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.

Publisher

University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.

Series/Report Name or Number

Civil Engineering Studies SRS-517

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/14135

Sponsor(s)/Grant Number(s)

National Science Foundation Grants CEE 80-02584 and CEE 82-13729

Owning Collections