【摘要】 为了研究地震作用下框架结构的倒塌破坏过程,改进了原有的双参数损伤指数模型。采用非线性动力有限元法计算了结构在地震作用下的弹塑性位移时程反应,以改进的基于变形和耗能的双参数构件损伤模型计算了构件的损伤指数,并且采用加权法计算了结构的整体损伤指数。采用基于"三水准"损伤指数的抗震设防目标,对结构倒塌破坏过程进行了定量的评估,分析结果表明,改进后的损伤指数模型能定量化、连续化地描述结构的倒塌破坏过程。更多还原

【Abstract】 To research on the collapse process of frame structure under earthquake,this paper improves the original two-parameter damage index model.Use the nonlinear dynamic finite-element method to calculate the elasto-plastic displacement-time response,calculate the damage index of the component with the improved deformation and energy dissipation-based biparametric component damage model,and calculate the integral structure damage index according to weighed average method.Use the three-level damage index-based earthquake-resistance fortified goal to evaluate the collapse process of reinforce concrete frame quantitatively,and the result shows that the improved damage index can describe the collapse process of structure quantitatively and consecutively.更多还原