墩高对简支梁桥抗震性能的影响分析

摘要

以位于高烈度地区的某高墩桥梁为例，建立了计算模型，对不同高度桥墩进行反应谱分析和非线性时程分析，研究了高墩简支桥梁在高烈度地震作用下不同墩型对墩底弯矩的影响，分析表明高墩简支梁桥整体呈现出柔性结构特点，在高烈度地震作用下墩底产生较大弯矩，随着墩高的增加，实心墩整体弯矩相对薄壁空心墩增加较快。%The PaPer is located in a highly seismic region high bridge Pier examPle for analysis. And builds bridge calculation model to study the high Pier simPle bridge in highly seismic action when different tyPes of Piers Produce imPact to Pier bottom moment and use resPonse sPectrum analysis and nonlinear time history analysis to study different height Piers,the analysis shows a simPly suPPorted beam bridge with high Piers over-all showing flexible structural features,the Pier at the end of a high intensity earthquake has a greater moment. With the increase of high Pier, solid Pier overall moment relatively thin-walled hollow Pier increased raPidly.