CFRP约束钢管混凝土核心柱承载力简化分析

Simplified Analysis of Bearing Capacity of Concrete Filled Steel Tubular Core Columns with CFRP Composite Materials

为了推导CFRP环向约束钢管混凝土轴压短柱承载力计算公式,对该类构件的受力机理和破坏特征进行了理论分析。基于极限平衡原理和极限分析的基本假设,得到CFRP环向约束构件的承载力计算公式。为了验证理论公式的有效性,利用试验数据进行对比,结果表明:计算结果与试验结果吻合较好;极限承载力主要取决于由CFRP和钢管产生的约束效应。研究结论可为CFRP约束钢管混凝土结构的实践应用提供参考。

To derived the calculation formula of bearing capacity of concrete filled steel tubular core columns with CFRP composite materials,the mechanical mechanism and failure characteristics are investigated theoretically.Based on the basic assumptions of limit analysis,the calculation formula of bearing capacity of concrete filled steel tubular core columns with CFRP composite materials is given by limit equilibrium theory. In order to validate the formula,the calculated results of the proposed method agree with the experimental ones reported in other paper.And the bearing capacity of specimen depend on the effect of restraint from CFRP and steel tube. The conclusion can provide references for the practical application of concrete filled steel tubular structure with CFRP composite materials.