Dynamically equivalent rocking structures
Dynamically equivalent rocking structures
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DOI：
10.1002/eqe.2410
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发表时间：
2014-08
影响因子：
4.5
通讯作者：
M. DeJong;E. Dimitrakopoulos
中科院分区：
文献类型：
--
作者：
M. DeJong;E. Dimitrakopoulos
预测结构对地面运动的摇摆响应对于评估可能易受抬升和倾覆影响的现有结构以及采用摇摆作为隔震手段的设计都很重要。然而，大多数研究使用单个摇摆块来表征摇摆运动。在本文中，提出了一种方法来推导之间的等效的单个摇块和各种摇摆机构，产生一组基本摇摆参数。具体的结构，具有确切的动态等效与一个单一的摇摆块，首先进行审查。随后，通过对相关运动方程进行局部线性化，实现了单块机构和多块机构之间的近似等效。与线性化相关的近似误差量化的三个基本机制，提供了一个衡量的信心，所提出的方法可以应用。版权所有© 2014约翰威利父子有限公司.
Predicting the rocking response of structures to ground motion is important for assessment of existing structures, which may be vulnerable to uplift and overturning, as well as for designs which employ rocking as a means of seismic isolation. However, the majority of studies utilize a single rocking block to characterize rocking motion. In this paper, a methodology is proposed to derive equivalence between the single rocking block and various rocking mechanisms, yielding a set of fundamental rocking parameters. Specific structures that have exact dynamic equivalence with a single rocking block, are first reviewed. Subsequently, approximate equivalence between single and multiple block mechanisms is achieved through local linearization of the relevant equations of motion. The approximation error associated with linearization is quantified for three essential mechanisms, providing a measure of the confidence with which the proposed methodology can be applied. Copyright © 2014 John Wiley & Sons, Ltd.