【作者】 刘界鹏； 张素梅；

【Author】 LIU Jie-peng ZHANG Su-mei (School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)

【机构】 哈尔滨工业大学土木工程学院；

【摘要】 提出了一种适于计算钢管混凝土压弯构件动力性能的钢材滞回模型,模型中考虑了钢材的环向拉力作用;建立了双向受力压弯构件截面弯矩-曲率关系的纤维模型计算方法,并应用本文提出的钢材模型和已有的混凝土模型编制了纤维模型数值计算程序,计算结果与典型试验结果进行了对比;分析了宽厚比、混凝土强度和钢材屈服强度对方钢管混凝土压弯构件截面弯矩-曲率滞回性能和抗弯承载力的影响.更多还原

【Abstract】 A cyclic model of the steel suitable for concrete-filled steel tube (CFT) analysis was presented in this paper.Hoop stress from steel to infilled concrete in CFT beam-columns were considered in the cyclic models.Moreover a fiber-based numerical program for CFT beam-columns subjected to unaxial and biaxial bending was developed and the results from the fiber model.analysis were comared with experimental results. The inversigation results indicate that the width-to-thickness ratio has a significant influence on the moment capacity and ducility of the CFT cross section.The compressive strength of concrete has little effect on the mo- ment capacity of the CFT cross section,while the ductility of the C FT cross section decreases as the concrete strength increases.更多还原