框架结构爆破震动响应的时程预测

Time-history predicting for vibration responses of a frame structure to blasting

对岩石爆破地震动作用下框架结构进行了动力分析,建立了爆破地震波作用下框架结构的空间非线性时程分析方法。利用选用二组实测典型爆破地震波,对一栋七层钢筋混凝土框架结构进行了实例分析,通过与天然地震波作用下结构的动力反应的对比,为框架结构在爆破地震波作用下的安全评估及推广应用提供了有效途径。从位移反应来衡量,爆破持时对框架结构有比较大的影响,持时达到一定时间后(约为1/4倍结构自振周期),持时对最大位移基本没影响。

A nonlinear dynamic analysis of a frame structure under blasting seismic wave was presented.The time-history analysis method of frame structures under blasting seismic wave was set up.Then,by adopting two kinds of blasting seismic waves,the response of a seven-floor frame structure was analyzed.At last,a security evaluation was made by contrasting with the results of its dynamic responses under earthquake waves.Meanwhile,the influences of the blast duration on the response of the 7-floor frame structure under the blasting seismic wave based on space cooperation theory were put forward by inputing the same frequency and vibration peak,but different duration of blasting seismic waves.Efficient path to assess the security of the response of the frame structure to blasting induced ground motions was submitted