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COMPUTATION AND ANALYSIS OF MULTI‐EXCITATION RANDOM SEISMIC RESPONSES

LIN JIAHAO (Research Institute of Engineering Mechanics, Dalian University of Technology, Dalian 116023, China)
F.W. WILLIAMS (Division of Structural Engineering, University of Wales College of Cardiff, PO Box 917, Cardiff CF2 1XH, UK)

Engineering Computations

ISSN: 0264-4401

Article publication date: 1 May 1992

Abstract

Because of the extensive use of long‐span structures in modern engineering, much attention has been given to the extent to which ground motion phase‐lags affect the internal forces of such structures. In this paper, this problem is studied from the aspect of random seismic analysis, i.e. the random seismic responses of long‐span structures are explored with the phase‐lags of the ground joints of the structures taken into account. The earthquake is regarded as a stationary random process. Formulae for calculating the random responses of the structural displacements and internal forces are derived. Numerical examples are presented which illustrate some basic features of such random response, and also show that the ground motion phase‐lags have considerable effects on structural safety analysis.

Keywords

Citation

JIAHAO, L. and WILLIAMS, F.W. (1992), "COMPUTATION AND ANALYSIS OF MULTI‐EXCITATION RANDOM SEISMIC RESPONSES", Engineering Computations, Vol. 9 No. 5, pp. 561-574. https://doi.org/10.1108/eb023884

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MCB UP Ltd

Copyright © 1992, MCB UP Limited