【摘要】 首先从竖向承载力角度,给出建筑结构地震倒塌破坏定义,并由此提出基于构件损伤指数的楼层损伤指数计算公式。然后在有关钢管混凝土构件低周疲劳试验基础上,对单步能量阈值与总滞回耗能线性组合的钢筋混凝土构件损伤准则进行修改,使之能够同时适用于钢筋混凝土构件与钢管混凝土构件地震损伤计算。算例表明,所建立的建筑结构地震损伤准则可靠、准确,可用于建筑结构地震作用下倒塌机理分析。更多还原

【Abstract】 Based on the axial residual strength of a reinforced concrete column,a seismic damage calculation formula for the floor,which is expressed by a seismic damage criterion of reinforced concrete elements,is proposed on the basis of the definition of structure seismic collapse.In order to suit the damage calculation of reinforced concrete elements and concrete filled steel tube elements at the same time,the damage criterion of reinforced concrete element which is a linear combination of one-step energy threshold and the total hysteretic energy,is modified by means of low cycle fatigue test on concrete filled steel tube elements.The results indicate that the proposed damage criterion of structures is reliable and accurate,which is able to be used to analyze the failure mechanism of structures under seismic excitations.更多还原