大比例浅水矩形水箱振动台试验研究及TLD等效线性化分析  

AN EXPERIMENTAL STUDY ON RECTANGULAR SHALLOW WATER TANK AND TLD EQUIVALENT LINEARIZATION ANALYSIS

作　　者：肖从真 巫振弘 陈凯 唐意 严亚林 XIAO Cong-zhen;WU Zhen-hong;CHEN Kai;TANG Yi;YAN Ya-lin(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：《工程力学》2025年第1期143-151,共9页Engineering Mechanics

基　　金：北京市自然科学基金项目(8212019);中国建筑科学研究院有限公司科研基金项目(20220118330730013)。

摘　　要：调谐液体阻尼器(TLD)是高层建筑减振的有效措施。该文进行了大比例浅水矩形水箱振动台试验研究,分析了将调谐液体阻尼器按等效线性化等效为单自由度系统的可行性。采用振动台试验得到目标水箱在0.6倍~1.4倍水体自振频率简谐激励荷载下,水体稳态振动时的水箱反力和频响函数;测量不同振动幅度下,水体的自振频率偏差;由水体自由振动衰减,测得5种不同网栅条件下的附加阻尼比;将风和地震荷载下某249m高楼顶加速度作为水箱激励进行振动台混合试验,实测水箱反力和滞回曲线,并与等效线性化模型计算结果进行对比。结果表明,以最大变形割线刚度作为等效刚度、按等能量方法确定阻尼比的等效线性化模型基本可行,在简谐波和风荷载作用下较符合试验结果,在地震荷载下存在一定偏差。试验结果可为类似调谐液体阻尼器设计提供依据。Tuned liquid dampers(TLDs)are effective measures for vibration reduction of high-rise buildings.In this paper,shaking table test study on a large scale shallow water rectangular tank was conducted and the equivalent linearization accuracy of the tuned liquid damper was analyzed.The tank reaction force and frequency response function of the target tank were obtained under 0.6~1.4 times of the fundamental frequency simple harmonic excitation load in steady state vibration.The water's sloshing frequency deviation under different vibration amplitudes was measured.The additional damping ratio of the tank under free vibration decays with five different damping device conditions.The equivalent linearization of TLD was discussed.The tank reaction force and hysteresis curve calculated by the equivalent linearized model were compared with the test results.The roof acceleration of a 249 m high building under wind and earthquake loads were used as test excitation.The results show that the equivalent linearized model with the maximum deformation cut-line stiffness as the equivalent stiffness and the damping ratio determined by the equal energy method is basically feasible.The result under simple harmonic and wind loads is more accurate,while more deviations are observed under seismic loads.The experimental results may provide a basis for the design of similar tuned liquid dampers.

关 键 词：高层结构 调谐液体阻尼器 振动台试验 附加阻尼比 浅水水箱 等效线性化 

分 类 号：TU317.1[建筑科学—结构工程]