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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。
The article studies the engineering characteristics of near-fault impulsive ground motion. With the choice of forward directivity, slide-slip effect and far-field three kinds of earthquakes, a nonlinear four-story RC frame is analyzed. When the seismic response of the structure enters the stage of elasto-plasticity, the response of the structure increases greatly compared with the response of the far-field ground motions under the action of the forward directivity and the sliding-slip effect. The destructive effect of the lower part of the more significant.