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Seismic Design of Cable-Stayed Bridges: Evaluation and Research Needs

by Ahmed M. Abdel-Ghaffar, Univ of Southern California, United States,
Aly S. Nazmy, Univ of Southern California, United States,



Document Type: Proceeding Paper

Part of: Structural Design, Analysis and Testing

Abstract:

Earthquake-response characteristics of cable-stayed bridge are evaluated. 2-D and 3-D models are considered. The cases of multiple-support and uniform excitations are considered; furthermore, effects of the nondispersive travelling seismic waves on the responses are studied. Different procedures to estimate earthquake loads on these bridges are presented. Parameters affecting the seismic response are discussed; among other factors are nonlinearity, ground motion inputs, structural connections and energy-absorption devices and special bearings. In addition to the fact that the study sheds some light on the salient features of the seismic analysis and design of these bridges, the study provides suggestions regarding research needs which should be given further attention and consideration.

Subject Headings: Seismic design | Cable stayed bridges | Bridge design | Seismic tests | Cables | Seismic loads | Dynamic structural analysis

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