【摘要】 将结构前两阶振型各自等效为单自由度,采用模态pushover分析确定各等效单自由度的屈服强度系数和延性系数,然后由反应谱计算各阶振型耗散能量需求,利用各振型能量分布曲线,求得各层耗散能量需求,叠加得到各层地震总能量需求,据此确定耗能装置的类型及设计参数。运用该方法对9层钢框架进行了设计,并通过非线性动力分析进行了验证,结果表明该方法精确度符合实际工程需求。更多还原

【Abstract】 Equivalent single-degree-of-freedom(ESDOF) systems for the first two modes are converted.Modal yield strength and ductility coefficients of the ESDOF system are determined and the distribution of hysteretic energy in each story is got by modal pushover analysis.The energy contribution of each mode is determined using energy spectra and the required amount of energy dissipation is estimated and used to design appropriate energy dissipation system.The application of the method is illustrated by an example of a nine-story steel frame with passive energy dissipation system design.The results from the proposed method agree with the results from the non-linear time-history analysis.更多还原