湖南大学学报（自然科学版）2024，Vol.51Issue(11)：1-11,11.DOI:10.16339/j.cnki.hdxbzkb.2024102
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
摘要
Abstract
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Key words
hydraulic system/vibration isolation/dynamic testing/hysteresis loop/finite element method分类
建筑与水利引用本文复制引用
鲁亮,汪磊,夏婉秋,李远清..液压蓄能式竖向隔震装置性能试验及隔震参数分析[J].湖南大学学报（自然科学版）,2024,51(11):1-11,11.基金项目
国家自然科学基金资助项目(51678453),National Natural Science Foundation of China(51678453) （51678453）
