Topographic effects on seismic response of long-span rigid-frame bridge under SV seismic wave

• 来源期刊: 地震学报（英文版）
• 学科: 地球科学
• 年，卷（期）: 2008,（3）
• 页码范围: 311-318
• 页数: 8页
• 分类号: P315.9|TU442.56
• 语种: 英文

摘要

Seismic ground motions of two neighboring mountains and the free surface between them are calculated under the SV seismic waves with three different incident angles. The results are then taken as the inputs of multi-point seismic excitations for the foundation of a long-span bridge built over the valley in the analysis considering the inte-grated influence of traveling wave and topography. On the basis of a dynamic analytical method, a finite element model is created for the seismic responses of a four-span rigid-frame bridge of 440 m. The pier-top displacement and the pier-bottom internal force of the bridge are calculated. Then the results are compared with those considering traveling-wave effect only. The conclusions can serve as a seismic design reference for the structures located on the complex mountain topography.