Seismic responses of bridge pier considering the effect of hydrodynamic pressure

Abstract

The bridge pier structure in deep water on the group piles is taken as the research object, the ABAQUS software is used as the computation platform, based on the Morison equation, using the added mass of water to consider the effect of water on bridge pier, establishing the mechanical model of water-soil-piles- pier structure multi-medium coupled, researching responses of the acceleration, relative displacement and inner force of the pier under the condition water-free and water-full, analyzing the effect of hydrodynamic pressure on the seismic responses of acceleration and relative displacement on the top of pier and the inner force under the bottom. The result indicates that, considering hydrodynamic pressure, the peak-acceleration, relative displacement, inner force are all increased, the increased amplitude is related to the strength and the spectrum character of the earthquake motion input. © 2008 Science Press Beijing and Springer-Verlag GmbH Berlin Heidelberg Geotechnical Engineering for Disaster Mitigation and Rehabilitation.