A substructure shaking table test for reproduction of earthquake responses of high‐rise buildings
A substructure shaking table test for reproduction of earthquake responses of high‐rise buildings
复制标题
DOI：
10.1002/eqe.907
复制
发表时间：
2009-10
影响因子：
4.5
通讯作者：
X. Ji;K. Kajiwara;T. Nagae;R. Enokida;M. Nakashima
中科院分区：
文献类型：
--
作者：
X. Ji;K. Kajiwara;T. Nagae;R. Enokida;M. Nakashima
当受到长周期地震动时，高层建筑的高层会产生较大的响应。在此类事件中，家具和非结构部件很容易受到严重损坏。本文提出了一种全尺寸下部结构振动台试验，以重现高层建筑的大地板响应。将虚拟 30 层建筑模型顶层对合成长周期地震动的响应作为目标波进行再现。由于各种容量限制，振动台难以直接再现如此大的响应，因此提出了橡胶和质量系统来放大振动台运动。为了实现地板响应的准确再现，使用一种称为模拟开环逆动态补偿（IDCS）算法的控制算法来为振动台生成特殊的输入波。为了实现IDCS算法，采用模型匹配法和H∞法构建控制器。给出了一个数值示例来说明开环 IDCS 算法并比较不同控制器设计方法的性能。 E-Defense 进行了一系列全尺寸下部结构振动台试验，以验证所提出方法的有效性并检查家具的抗震性能。测试结果表明，橡胶和质量系统能够将最大速度和位移放大约3.5倍的平台运动，并且下部结构振动台测试可以在几分钟内重现大地板响应。版权所有 © 2009 约翰·威利父子有限公司
When subjected to long‐period ground motions, high‐rise buildings' upper floors undergo large responses. Furniture and nonstructural components are susceptible to significant damage in such events. This paper proposes a full‐scale substructure shaking table test to reproduce large floor responses of high‐rise buildings. The response at the top floor of a virtual 30‐story building model subjected to a synthesized long‐period ground motion is taken as a target wave for reproduction. Since a shaking table has difficulties in directly reproducing such large responses due to various capacity limitations, a rubber‐and‐mass system is proposed to amplify the table motion. To achieve an accurate reproduction of the floor responses, a control algorithm called the open‐loop inverse dynamics compensation via simulation (IDCS) algorithm is used to generate a special input wave for the shaking table. To implement the IDCS algorithm, the model matching method and the H∞ method are adopted to construct the controller. A numerical example is presented to illustrate the open‐loop IDCS algorithm and compare the performance of different methods of controller design. A series of full‐scale substructure shaking table tests are conducted in E‐Defense to verify the effectiveness of the proposed method and examine the seismic behavior of furniture. The test results demonstrate that the rubber‐and‐mass system is capable of amplifying the table motion by a factor of about 3.5 for the maximum velocity and displacement, and the substructure shaking table test can reproduce the large floor responses for a few minutes. Copyright © 2009 John Wiley & Sons, Ltd.