钢-混组合长柱偏心受压数值模拟分析及程序

考虑两端铰接的任意截面钢-混组合长柱在偏心荷载作用下的附加弯矩影响（二阶效应）,提出一套可对长柱从加载到最终破坏全过程分析的数值模拟程序。该方法采用了一种新的纤维元理论来计算长柱的二阶效应和受力变形特性。根据该算法编制出相应的计算机程序,应用计算机程序对一配有工字型钢的矩形截面长柱进行计算分析,验证该方法的正确性和有效性。

Numerical Simulation Analysis and the Program for Steel-Concret Composite Long Column in Eccentricaly-loaded

A numerical simulation procedure is developed for the determination of complete analysis for arbitrarily shaped slender steel-concrete composite columns with two ends hinged under biaxial load. In the procedure, a new fiber element method is proposed to evaluate the second-order effect as well as the load-carrying and deformation behaviors. In order to implement the proposed numerical procedure, a computer program is developed. As numerical examples, a slender composite column of rectangular cross section with embedded H-shape structural steel is first considered. The complete load-deflection curve is obtained and compared with the corresponding experimental results. The comparison demonstrates the validity and accuracy of the proposed method.