低周反复荷载下钢筋混凝土异型节点的损伤分析

Damage analysis of SRC abnormal joints under low-cycle loads

基于钢筋混凝土异型节点的受力特点和破坏模式,提出了一种将其视为子结构进行损伤分析的方法,并建立了适用于低周反复荷载下钢筋混凝土异型节点的损伤模型.通过与试验结果相对比,证明,钢筋混凝土异型节点的损伤分析不仅丰富了伪静力条件下的实验内容,而且为该类节点受力机理和破坏过程的研究提供了一种行之有效的手段.研究表明,在伪静力条件下钢筋混凝土异型节点的总体损伤是由其内部各主要控制因素的损伤共同贡献而成,在加载之初受混凝土损伤影响较大,而在加载中后期则主要由节点核心区纵筋及箍筋的损伤起控制作用.

Based on the mechanical character and failure model of SRC abnormal joints, a damage analysis method with sub-structure and a damage model applying to SRC abnormal joints are put forward. Compared with the results of the test, a conclusion is achived,that is,SRC abnormal joints make the contents of pseudo static test more comprehensive providing an available means for the research of abnormal joints.In the condition of pseudo static,the general damage of SRC abnormal joints are formed through the damage of enery mainly inner controlling factors.The general damage is formed mainly through the damage of concrete in the beginning of loading and controlled mainly by the damage of the longitudinal steel bars and stirrup in the middle and later periods.