矩形脉冲激励下自复位墙动力摇摆倾覆分析

Rocking response of a self-centering wall with overturning analysis under rectangular pulse

针对自复位墙在矩形脉冲作用下的动力摇摆响应,在考虑预应力筋断裂基础上,采用数值方法求解墙体动力方程,对比普通摇摆墙和自复位墙的倾覆谱,并针对影响自复位墙特性的参数进行倾覆谱计算分析。结果表明减小墙体高宽比和增加预应力筋初张力使墙体在预应力筋断裂后倾覆概率增加,预应力筋刚度对于墙体倾覆影响有限。自复位墙倾覆谱附加安全区域SN的位置和面积与墙体高宽比、预应力筋初张力和刚度均有关。

To investigate the rocking response of a self-centering wall under rectangular pulse,the numerical methods were used to solve the dynamic equations which considering the fracture of post-tensioned tendons( PT tendons). Then,the overturning spectrums of rocking wall and self-centering wall were compared. In the last,a parameter analysis was conducted to analyze the influence to self-centering wall. The result shows the decrease of height-width ratio and the increase of initial force in PT tendons result in the increasing possibility to overturn the wall,and the stiffness coefficient of PT tendons has limited effect on the overturning of the wall. But,the area and the position of extra safety area SN in overturning spectrum are all influenced by these three parameters.