非对称结构调频液柱阻尼器空间位置优化研究

Optimal Spatial Placement of TLCD for Plan-asymmetric Structure

调频液柱阻尼器(tuned liquid column damper,TLCD)是减振被动控制中一种十分有效的结构减震装置。耗能减震结构设计的关键之一,在于合理选取阻尼器的数目和位置。偏心放置的U/V型调频液柱阻尼器能有效地减小地震作用下非对称结构以平移为主的扭转耦联反应。本文对该阻尼器在非对称结构楼面空间的优化设置进行了系统的研究,并提出了以模态速度瞬心和GADS遗传算法与直接搜索工具箱来进行优化的方法。以单层和4层非对称结构为例进行数值分析,证明了这两种方法的有效性与可靠性。

The tuned liquid column damper（ TLCD） is an effective passive control device to reduced vibration of tall buildings and slender bridges under seismic or wind loads. The important point of energy absorbing structure design is the suitable selection of the number and location of absorbers. The eccentrically located U- or V-shaped TLCD is suitable to mitigate the dominating translational vibration. The TLCD＇s optimal spatial placement of the asymmetric structure is systemically investigated,and the modal center of velocity and GADS toolbox in MATLAB to optimize the placement of TLCD are carried out. Single-storey and four-storey asymmetric structure as numerical examples,it is shown that the two methods are effective and convenient to optimize the TLCD ＇s spatial placement of asymmetric structure reducing the coupled translational-torsional vibration under earthquake motion.