高层建筑中调谐液体阻尼器频率偏差成因及高鲁棒性控制措施分析  

Study on the frequency deviation and high robust control measures of TLD in high-rise buildings

作　　者：巫振弘 陈凯 肖从真 唐意 严亚林 Wu Zhenhong;Chen Kai;Xiao Congzhen;Tang Yi;Yan Yalin(China Academy of Building Research,Beijing 100013,China;National Engineering Research Center of Building Technology,Beijing 100013,China)

机构地区：[1]中国建筑科学研究院有限公司,北京100013 [2]国家建筑工程技术研究中心,北京100013

出　　处：《建筑科学》2022年第11期146-154,共9页Building Science

基　　金：北京市自然科学基金(No.8212019);中国建筑科学研究院有限公司科研基金(20220118330730013)。

摘　　要：本文分析了浅水水箱调谐液体阻尼器(TLD)系统非线性晃动致刚度硬化和水深控制偏差两种导致TLD系统自振频率偏差的因素。以某250m高层建筑为研究对象,分析了这两种频率偏差因素导致的TLD系统减振率下降幅度。给出提高TLD系统阻尼比和双水箱联合控制两种提高TLD系统减振率鲁棒性的措施。结果表明,提高TLD系统阻尼比和合理设计的双水箱联合控制均可以有效提高TLD系统减振鲁棒性。当双水箱TLD系统两个水箱水深符合独立正态分布时,为达到相同的最低减振率保证率目标,设置两个水箱水深期望值0.8和1.2,比两个水箱水深期望值均为1.0,前者所需控制的水深偏差更小,水深控制难度更小。The two factors that lead to the deviation of the fundamental frequency of the TLD is investigated, due to stiffness hardening by nonlinear shaking of the shallow water tank and the deviation of the water depth control. Taking a 250 m high-rise building as the research object, the TLD damping rate decrease caused by these two factors is analyzed. Two measures to improve the robustness of TLD damping rate are given, which are improving the damping ratio of TLD and using double water tanks. The results show that both the damping ratio and the double water tanks control can effectively improve the tank damping robustness. For double tank control research, the water depth of the two tanks is considered as independent normal distribution. Setting two tank water level expectation values as 0.8 and 1.2, rather than setting as both 1.0, the required control of water depth deviation is smaller, and the damping robustness is better.

关 键 词：调谐液体阻尼器 频率偏差 附加阻尼比 减振效率分析 

分 类 号：TU971[建筑科学—建筑理论]