单自由度体系在多次地震作用下的响应分析

Response analysis of single degree of freedom system under multiple earthquakes

基于opensees软件,通过数值模拟与国外学者的试验数据的比对,验证有限元模型的可靠性。对3个不同周期的模型进行多次地震分析和单一地震分析。结果显示,结构在多次地震作用下存在残余变形和振幅增大等现象。由于多次损伤的积累,多次地震分析下结构的抗震性能出现不同程度的变化,且与结构周期和地震波存在一定的关联性。

Based on opensees software,the reliability of the finite element model is verified by comparing the numerical simulation with the experimental data of foreign scholars. Multiple seismic analysis and single seismic analysis were carried out for three models with different periods. The residual deformation and amplitude increase of the structure under multiple earthquakes. Due to the accumulation of damage,the seismic behavior of the structure changes in different degrees under multiple seismic analysis,and it is related to the period of the structure and the seismic wave.