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工程力学  2013 

弯曲型支撑-框架的假想荷载法

DOI: 10.6052/j.issn.1000-4750.2012.06.0402, PP. 110-119

Keywords: 支撑框架,假想荷载,二阶弹性分析,计算长度,有限元

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Abstract:

为避免在钢结构设计中逐一去确定框架柱的计算长度,该文提出了一种应用于弯曲型支撑框架的假想荷载法。将假想荷载作用于框架楼层,配合二阶弹性分析,考虑材料非线性、残余应力和初始几何缺陷,研究了多种几何和荷载条件下的弯曲型支撑框架模型,分析了一系列模型的极限承载力,提出了统一的假想荷载系数以及假想荷载的近似公式,无论是有水平荷载或无水平荷载,无论是等截面还是变截面,其结果与有限元结果都符合较好。

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