基于OpenSees桥梁多点激励子结构拟动力试验方法研究

Research on OpenSees based substructure pseudo-dynamic test method for bridge considering multi-point excitation effect

当进行考虑桩土相互作用和多点激励影响的桥梁子结构拟动力试验时,需要耗费大量时间编写结构地震响应模拟程序。因此,在解读通用有限元软件OpenSees功能的基础上,结合子结构拟动力试验的基本特征,研究基于OpenSees考虑桩土相互作用的桥梁子结构拟动力试验方法和程序。采用数值模拟方法进行虚拟子结构拟动力试验,通过和采用OpenSees的整体结构时程分析结果对比,验证了本文子结构拟动力试验方法和程序的可靠性。此外,将该程序进一步扩展用于多点激励下的桥梁子结构拟动力试验,并通过虚拟子结构拟动力试验方法进行可靠性验证。

A lot of programing work for seismic performance simulation should be done to conduct substructure pseudo-dynamic tests of bridge when considering pile-soil interaction and multi-point excitation.For this reason,based on the widely used finite element software OpenSees and basic characteristics of substructure pseudo-dynamic test,an OpenSees based substructure pseudo-dynamic test program for bridge was developed,in which the pile-soil interaction effect was considered.Using numerical simulation based virtual substructure pseudo-dynamic test,the reliability of the proposed method and program was verified by comparing the results of test and time-history analysis with OpenSees.Furthermore,the program was enhanced for substructure pseudodynamic tests of bridge considering multi-point excitation effect and its reliability was verified using virtual substructure pseudo-dynamic test.