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Rocking Response Analysis of Self-Centering Walls under Ground Excitations

机译：地面激励下自定心墙的摇摆响应分析

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摘要

This paper presents a numerical procedure to simulate the rocking response of self-centering walls under ground excitations. To this aim, the equations of motion that govern the dynamic response of self-centering walls are first formulated and then solved numerically, in which three different self-centering wall structural systems are considered, that is, (i) including the self-weight of the wall only, (ii) including posttensioned tendon, and (iii) including both posttensioned tendon and dampers. Following the development of the numerical procedure, parametric studies are then carried out to investigate the influence of a variety of factors on the dynamic response of the self-centering wall under seismic excitations. The investigation results show that within the cases studied in this paper the installation of posttensioned tendon is capable of significantly enhancing the self-centering ability of the self-centering wall. In addition, increasing either the initial force or the elastic stiffness of the posttensioned tendon can reduce the dynamic response of the self-centering wall in terms of the rotation angle and angular velocity, whereas the former approach is found to be more effective than the latter one. It is also revealed that the addition of the dampers is able to improve the energy dissipation capacity of the self-centering wall. Furthermore, for the cases studied in this paper the yield strength of the dampers appears to have a more significant effect on the dynamic response of the self-centering wall than the elastic stiffness of the dampers.
机译：本文提出了一种数值程序来模拟在地面激励下自定心墙的摇摆响应。为此，首先制定了控制自定心墙动态响应的运动方程，然后进行数值求解，其中考虑了三种不同的自定心墙结构系统，即（i）包括自重（ii）包括后张筋，以及（iii）包括后张筋和阻尼器。随着数值程序的发展，然后进行了参数研究，以研究各种因素对地震激励下自定心墙动力响应的影响。研究结果表明，在本文研究的案例中，后张筋的安装能够显着增强自定心墙的自定心能力。此外，增加后张筋的初始力或弹性刚度可以降低自定心壁在旋转角度和角速度方面的动态响应，而发现前一种方法比后者更有效。一。还显示出，增加阻尼器能够提高自定心壁的能量消散能力。此外，对于本文研究的案例，阻尼器的屈服强度似乎比阻尼器的弹性刚度对自定心壁的动力响应具有更大的影响。

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  • 来源
    《Mathematical Problems in Engineering》 |2018年第3期|4371585.1-4371585.12|共12页
  • 作者

    Hu Xiaobin; Lu Qinwang; Yang Yang;

  • 作者单位

    Wuhan Univ, Sch Civil Engn, Wuhan 430072, Peoples R China;

    Wuhan Univ, Sch Civil Engn, Wuhan 430072, Peoples R China;

    Wuhan Univ, Sch Civil Engn, Wuhan 430072, Peoples R China;

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