Response of Two-Span Beam to Spatially Varying Earthquake Excitation

by Ronald S. Harichandran, Michigan State Univ, United States,
Weijun Wang, Michigan State Univ, United States,

Document Type: Proceeding Paper

Part of: Probabilistic Methods in Civil Engineering


The effect of the spatial variation of strong ground motion should be considered in the analysis and design of large structures such as bridges, lifelines, dams, etc. The stochastic response of a simple model of an indeterminate bridge, a two-span beam, due to correlated support excitations resulting from spatially varying seismic ground motions is analyzed herein. The ground motion model is based on the analysis of recordings made by the SMART-1 seismograph array. Different types of support motion correlations are considered. The beam is modeled by finite elements and the displacement and curvature responses are computed.

Subject Headings: Beams | Ground motion | Earthquakes | Excitation (physics) | Finite element method | Span bridges | Dynamic structural analysis | Bridge components

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