【摘要】 基于结构能量输入历程的简化描述,建立结构变形能耗散历程的简化模型。该简化模型以最大瞬时变形能、总滞回耗能和能量增长持时作为控制参数。根据该简化模型能够获得结构变形能增量历程,从而实现基于变形能增量历程的结构往复推覆分析。该往复推覆分析方法能够较为准确的估计钢筋混凝土框架结构在地震作用下的出铰模式、最大层间位移、累积滞回耗能及滞回耗能的分布。通过对无损结构与已损结构(往复推覆后的结构)分别进行单向推覆分析,根据单向推覆过程中塑性铰滞回耗能能力的变化与结构层耗储变形能能力的变化来获得对结构局部损伤与整体损伤的描述。更多还原

【Abstract】 By established the relationship between the time varying characteristic of momentary input energy and strain energy dissipation history of linear single degree of freedom system,a simplified procedure to simulate strain energy dissipation history is proposed.Based on the strain energy dissipation history,a modified cyclic pushover method which can simulate the maximum deformation,total hysteretic energy and characteristics of energy dissipation history is elaborated to evaluate the seismic damage index of reinforced concrete frames.The damage index keeps clear rules for combining local damage indices into global damage indices.更多还原