【摘要】 基于Bouc-Wen模型的Barber捏缩及强度退化修正,通过模块化编程,将地震动峰值加速度和峰值速度之比(PGA/PGV)作为指定场地条件下的地面运动特征参数;分析该参数对于增量动力分析(IDA)曲线的影响;比较Bouc-Wen模型修正前后的IDA曲线受PGA/PGV的影响差异。计算结果表明:Bouc-Wen修正模型能够模拟较典型的非线性特征,Bouc-Wen修正及非修正模型的IDA曲线随PGA/PGV增加均有显著变化趋势,且受结构特征影响,两种模型的曲线变化趋势亦有明显差异。更多还原

【Abstract】 Programming modules are presented for the pinching and degrading modification of Bouc-Wen oscillator. An analysis is performed to investigate the significance of peak ground acceleration to velocity ration on the IDA curves,which are based on modified and un-modified Bouc-Wen oscillators. The peculiarities of IDA curves variation trend with the increasing of PGA / PGV for the two kinds of oscillators are compared. The results presented indicate that the modified Bouc-Wen oscillator is fit for the structural nonlinear dynamic simulation,PGA / PGV is significant to the shape of IDA curves,and with the PGA / PGV increasing,there is significant difference in the IDA curves variation trend between the two kinds of Bouc-Wen models.更多还原