Research on the traveling wave effect of a rigid-continuous girder bridge with high piers based on multi-support excitation

摘要

This paper, aiming at rigid-continuous girder bridge with high piers, uses the large mass method (LMM) to analyze the seismic response of such special structure under a series of different phase differences by considering both rigid foundation and elastic foundation models. In addition, this paper discusses the influence rules for extreme response of different parts of structure due to traveling wave effect. The result shows that traveling wave effect greatly affects the rigid-continuous girder bridge with high piers. When considering the traveling wave effect, the internal force of bridge piers presents increasing trend, and the displacement of pier top reduces with increasing phase differences. The internal force and extreme displacement response of bridge structure present cyclical variations with phase differences, and that cycle is consistent with the characteristic period of bridge.