Seismic Bridge Response to Differential Ground Motion and Comparison with Algerian Seismic Design Rule

Abstract eng:
Seismic response of extended structures, such as bridges, must take into account spatial variability of earthquake ground motion (SVGM). Models that describe SVGM have been developed during last decades and structural analyses have been performed on numerous structures. Based on these studies, simplified approaches have been developed. The new Algerian bridge seismic regulation code proposes a simplified approach that takes into account SVGM. This paper aims at performing preliminarily studies on the accuracy of this method. This is performed through comparison with more refined approaches. Bridges, with different overall lengths and seating on different types of site conditions, are considered. The results show that this simplified method overestimates the response of the analyzed bridges.

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