近场地震动对RC框架地震反应的影响

Influence of Near-field Ground Motion on RC Seismic Frame Response

文章研究了近断层脉冲地震动的工程特性。选择具有前方向性效应、滑冲效应和远场地三类地震动作为输入,对一座四层钢筋混凝土框架进行非线性时程分析。当结构的地震反应进入弹塑性阶段后,与远场地震动下的反应相比,在具有前方向性效应和滑冲效应地震动作用下,结构的反应有较大幅度的增大,对结构中下部的破坏作用的影响比较显著。

This paper examines the engineering characteristics of the near-fault pulse seismic. The nonlinear time history analy：sis of a four-story RC frame structure is implemented based on selecting directivity effect, ：slip effect and far-field ground motion as inputs The structural responses are increased when the structural seismic responses step into the elastic-plastic stage, compared with far-field ground motion, and the influence of damaging on the mid-lower structure is significantly greater.