液压蓄能式竖向隔震装置性能试验及隔震参数分析  

Performance Experimental Study and Vibration Isolation Parameter Analysis on Vertical Seismic Isolation Device with Hydraulic Jack and Accumulator

作　　者：鲁亮[1] 汪磊 夏婉秋 李远清 LU Liang;WANG Lei;XIA Wanqiu;LI Yuanqing(College of Civil Engineering,Tongji University,Shanghai 200092,China;Guangdong Architectural Design and Research Institute Co.,Ltd.,Guangzhou 510010,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]广东省建筑设计研究院有限公司,广东广州510010

出　　处：《湖南大学学报（自然科学版）》2024年第11期1-11,共11页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51678453)。

摘　　要：提出一种由液压油缸和蓄能器组成的新型竖向隔震装置,用于建筑结构竖向隔震.首先,介绍液压蓄能式竖向隔震装置的工作原理,并建立了非线性刚度模型和阻尼耗能模型.其次,开展了频率相关性、位移幅值相关性的反复加载试验,测得液压蓄能式竖向隔震装置的竖向刚度和阻尼耗能性能参数.试验结果表明,隔震装置的竖向刚度呈现非线性变化,理论值和实测试验值误差在±3%以内;隔震装置的滞回曲线饱满,具有较强的耗能性能,阻尼特性为速度相关型,试验结果与理论计算值吻合.最后,利用有限元方法建立不同竖向刚度和阻尼系数的竖向隔震结构数值分析模型,研究了在竖向地震作用下,隔震装置参数对结构隔震效果的影响.结果表明,隔震结构竖向刚度降低会导致竖向位移响应增大,而竖向加速度响应减小;通过调节阻尼调节阀可有效控制隔震结构在地震作用下的竖向位移,从而实现良好的隔震效果.A new type of vertical seismic isolation device,consisting of hydraulic jack and accumulator(VSI-HJA),is proposed for vertical vibration isolation of building structures.Firstly,the working principle of VSI-HJA is introduced,and the non-linear stiffness model and the energy dissipation model of the isolation system are established.Secondly,cyclic loading tests were conducted to assess the frequency dependence and displacement amplitude dependence,and the equivalent stiffness and energy dissipating parameters of VSI-HJA were measured.The test results indicate that the vertical stiffness of the device varies nonlinearly with an error within±3%between the theoretical and experimental values,the seismic isolation device develops a full hysteresis loop,shows strong energy dissipation capacity,has velocity-dependent damping property.The test results are in good agreement with the calculated results.Finally,the effectiveness of the proposed VSI-HJA is further investigated by simulating the seismic isolation effect of structures with different device parameters using the finite element method.The research results reveal that the displacement response of the isolated structure increases correspondingly with the weakening of their vertical stiffness,while the acceleration response decreases.The isolated structure demonstrates excellent seismic isolation performance,and the vertical displacement of the isolated structure under the earthquake can be effectively controlled by the damping adjustment.

关 键 词：液压系统 隔震 动力试验 滞回曲线 有限元方法 

分 类 号：TU352.1[建筑科学—结构工程]