方钢管混凝土框架加固后的非线性有限元分析——受低周反复荷载作用  

Nonlinear finite element analysis of repaired concrete-filled rectangular tubular frame under low-cyclic reversed loading

作　　者：辛立民[1] 王铁成[1] 张凌[1] 

机构地区：[1]天津大学建工学院,天津300072

出　　处：《自然灾害学报》2007年第4期115-120,共6页Journal of Natural Disasters

基　　金："863"国家高新技术研究发展计划项目(2004AA33G050)

摘　　要：建立了加固后损伤方钢管混凝土框架的三维非线性有限元分析模型,用以研究该框架在低周反复荷载作用下的抗震性能。该模型考虑了钢与混凝土的黏滑作用。通过与损伤方钢管混凝土框架加固后的结构在低周反复荷载作用下滞回曲线和刚度退化曲线的对比表明,计算结果较为精确,该模型可以应用于方钢管混凝土框架的结构分析中。同时由试验和有限元分析计算的结果可知,损伤方钢管混凝土框架结构加固后,具有较好的抗震性能。A 3-D nonlinear finite element model for repaired concrete-filled rectangular steel tubular frame （CRSTRF） is proposed in this paper to research the seismic behavior of this type of structure under low-cyclic re- versed loading. The bond-slip action between steel and concrete has been taken into account in the model. Compared with the experimental hysteresis curve and stiffness degradation curve, the computational results are found to be accurate, which shows that the model proposed in the paper can be applied to structure analysis of repaired con- crete-filled rectangular steel tubular frames. From the analysis of test results and theoretical calculation ones, it can be concluded that the repaired concrete-filled rectangular steel tubular frame has a better seismic performance.

关 键 词：损伤 加固修复 抗震性能 方钢管混凝土框架 滞回性能 非线性有限元分析 

分 类 号：TU398.9[建筑科学—结构工程]