哑铃型钢管混凝土柱的面内弹塑性分析

The Elasto-plastic In-plane Ultimate Load Analysis for CFST Structures

采用非线性有限元方法,基于梁理论的纤维单元模型,考虑钢管混凝土的几何非线性和材料非线性因素,建立弹塑性分析方法.应用该方法对哑铃型截面钢管混凝土柱进行极限承载力分析,结果表明本文分析结果与试验数据吻合很好,验证了本文提出的分析方法和程序的可靠性和准确性.并通过对哑铃型截面钢管混凝土柱的参数对比分析,得出了长细比与极限承载力的关系曲线.

In the paper, according to the principle of the non-linear FEM, based on the fiber model of beam structure and the geometric and material non-linearily of the CFST structures, an approach is presented for the ultimate load capacity analysis of CFST structures with dumbbell sections. Then the limit loads of CFST columns with dumbbell section are computed, and the results verify the validity and accuracy of the proposed method. With the comparison of the limit loads of CFST columns under various influential parameters, slender proportion-limit load curves are obtained.