【摘要】 基于等效线性方法,分析地震作用下结构进入弹塑性阶段后的不同自振周期简化计算方法,并建立结构刚度与周期的关系.在Ghobarah整体损伤评价模型的基础上,推导新的结构整体损伤指数计算式,并采用4根破坏性试验柱和两榀框架的数据,对表达式进行验证分析.结果表明:该表达式是合理、正确的,可应用于地震作用下结构的整体损伤评价.更多还原

【Abstract】 Based on the method of equivalent linearization,the simplified methods to calculate the natural period of structure in elastic-plastic state under earthquake were discussed.The relationship between the structure stiffness and period was also built.Combining the evaluation of the global damage model by Ghobarah,a new expression was derived to calculate the global damage index of the structure,and was validated by the data of destructive tests of four columns and two frames.The results show the new expression is reasonable and corrective,which could be applied in the evaluation of global structure seismic damage.更多还原