不规则结构隔震设计与研究

目的对比L型不规则隔震结构不同布置方案，确定最优方案并对最优方案进行结构减震分析．方法从建筑功能和减震效果两个方面评价3种不同方案，对最优方案进行抗风计算和地震作用下的非线性时程分析．结果不同方案会引起建筑功能和减震效果的不同，需要综合评价；L型隔震结构可以通过隔震层支座有效布置，使得结构质心和刚心尽量重合，减小了结构的扭转效应；最优方案在地震作用下的非线性时程分析结果显示结构减震效果良好，各项指标均满足规范要求．结论L型隔震结构可选用将隔震层以上结构完全连接的布置方案，既保持了良好的建筑功能，又获得了良好的减震效果，亦可以采用两个结构完全分开的布置方案．

Design and Research of Irregular Isolation Structure

This article makes a comparison among the different layout plans for L-type irregular isolation structure, finally confirms the optimal one and carries out of structural damping analysis on it. It evaluates three different plans in aspects of building function and damping effect, then conducts wind resistance calcu- lation and nonlinear time-history analysis under earthquake action on the optimal plan. As different plans will produce different building functions and damping effects, therefore, it is necessary to make comprehensive e- valuation. The conclusion indicates that through effective layout of isolation layer support, L-type isolation structure could enable structural centroid and stiffness center to coincide as far as possible, so as to reduce structural torsional effect;the result of nonlinear time-history analysis of optimal plan under earthquake ac- tions indicates a good structural damping effect with all indexes meeting with the specified requirements;and the L-type isolation structure may choose the layout plan of complete connection inside the structures above the isolation layer, which not only keeps good building function but also acquires excellent damping effect.However the layout plan with two structures wholly separated can be applied as well.