加载途径对钢压弯构件稳定极限承载力的影响

Influence of Loading-Path on Ultimate Carrying Capacity of Beam-Columns

本文说明了影响系数矩阵本质上即为牛顿-拉夫逊(Newton-Raphson)迭代法中的切线刚度矩阵。在文献[2][3]的基础上,研究了非比例加载条件下压弯构件的极限承载力以考察加载途径的影响。最后,还讨论了加载途径对钢结构规范(GBJ 17-88)中压弯构件稳定设计公式的影响。

The Influence Coefficient Matrix Method proposed in the references [1], [2], [3] is explained as being consistent with the tangential stiffness matrix in the Newton-Raphson Iterative Method in this paper. Based on the references [2] and [3],the influences of loading-path on the ultimate carrying capacity of nonproportionally loaded beam-columns have been studied. At last, the influence of loading-path on the interaction formulas for stability design of beam-columns in GBJ 17-88 has also been discussed.