CFRP钢管混凝土轴压短柱的力学性能计算

The Calculation of Mechanical Properties of Concrete Filled CFRP-steel Tubes under Axial Compression

目的用合成法得到CFRP(碳纤维增强塑料)钢管混凝土构件的荷载-应变关系全过程曲线并研究该新型构件的力学性能.方法以合成法为基础,分别选定CFRP、钢材及核心混凝土的本构关系模型,运用平衡条件和变形协调条件将三者的应力-应变关系合成构件的组合关系,对构件的受力行为进行全过程分析.结果通过研究CFRP、钢材及混凝土这三种材料的本构关系模型,得到组合材料的本构关系模型.结论试验验证,用合成法得到的该种构件荷载-应变关系全过程曲线与试验得到的构件荷载-应变关系全过程曲线相吻合,证明了该理论的正确性.

The whole process analysis is carried on of the loading capacities of the axially compressed concrete filled CFRP-steel tube and the stress-strain relationships of CFRP. Steel and concrete core are selected to integrate the three stress-strain relationships into combination relationship under balance condition and accord of distortion. The load-strain relationship is certain to involve tighten effect because the stress-strain relationship of concrete core involves tighten effect by steel and CFRP. The curve of concrete filled CFRP-steel tube computed with combination method accords well with the experimental results.