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本文在文献[1]的基础上,建议采用类似的有限单元法,计算双向压弯箱形截面构件的弹塑性稳定承载力;同时进行了9根箱形截面试件的试验,并以所建议的方法在考虑了构件的初挠曲和截面内的残余应力的情况下,对试件进行计算,经与实测值比较,证实所建议的分析方法具有极好的精度,可以作为进一步研究这类构件受力的理论依据。 在上述工作的基础上,对在常用长细比范围的构件进行了系列计算,提出实用计算公式供设计者参考。
On the basis of [1], this paper proposes to use a similar finite element method to calculate the elasto-plastically stable load-bearing capacity of a box-section member with bi-directional bending and bending. At the same time, tests of 9 box-section specimens were carried out and suggested. The method calculates the specimen under consideration of the initial deflection of the component and the residual stress in the section. After comparing with the measured value, it confirms that the proposed analysis method has excellent accuracy and can be used as a further study of this type. The theoretical basis for the force of the component. On the basis of the above work, a series of calculations are performed on the components of the common slenderness ratio range, and a practical calculation formula is proposed for designers’ reference.