Abstract：Here, to quickly and accurately predict the upper limit value of isolated layer response of a base isolated structure, the seismic energy balance equation was established for the base isolated structure with hysteretic dampers set in its isolated layer.According to the empirical formula for the lower limit value of equivalent reciprocating hysteretic number, a seismic response prediction method considering reduction of equivalent reciprocating hysteretic number was proposed.The derivation process of the prediction formula was presented, and the phenomenon of equivalent reciprocating hysteretic number decreasing during larger damping was analyzed.The correctness of the prediction method was verified through nonlinear time history analysis.The shear reduction effect on the optimal total shear coefficient design was analyzed.The linear combination of the total shear reduction rate and the displacement reduction rate was used to construct the objective function of optimization design, and an optimization design method considering different requirements of shear and displacement was proposed.Through the optimization design and time history analysis for a 6-story steel frame base isolated structure, the feasibility and high efficiency of the proposed optimization design method were verified.
张云浩，李波，严国虔，郑光益，鲍银鹏. 基于能量平衡的基础隔震结构地震响应预测及优化设计法研究[J]. 振动与冲击, 2021, 40(17): 32-40.
ZHANG Yunhao, LI Bo, YAN Guoqian, ZHENG Guangyi, BAO Yinpeng. Seismic response prediction and optimization design method for base isolated structure based on energy balance. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(17): 32-40.
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