利用Matlab编写了一套Newmark时程分析法与刚度退化二线型恢复力模型相结合求解多层砌体结构体系弹塑性地震响应的程序.以一个具体的4层砌体结构为分析对象,输入荷载用实测及人工模拟爆破地震波作用的形式,并按某原则变换输入爆破地震波的特性参数,根据所求出的结构各弹塑性地震响应幅值结果,分别讨论了爆破地震波幅值、主频和持续时间对多层砌体结构弹塑性地震响应幅值的具体影响,为建立多参数爆破震动安全判据和爆区建筑物的爆破地震效应评估提供了理论和数值实验基础.%A set of programs for solving elastic-plastic seismic response of multistory masonry buildings was written by Matlab, which combined Newmark time-history method with two-linear model of stiffness degradation. A four-story masonry building was taken as the analyzed object, and the actual and artificial-simulated blasting seismic waves were used as the input loads, whose characteristic parameters were transformed based on a certain principle. According to calculated results of amplitude for all structural elastic-plastic seismic response, effects of amplitude, dominant frequency and duration of blasting seismic waves on elastic-plastic seismic response of multistory masonry buildings were discussed respectively. The present study will provide theoretical and numerical experiment foundation for establishing multi-parameter safety criterion of blasting vibration and assessing blasting seismic effects of buildings in blasting zone.
展开▼
