两侧加劲钢板深梁弹性屈曲分析

发布时间：2018-05-07 08:52

本文选题：两侧加劲 + 钢板深梁　；参考：《建筑钢结构进展》2016年06期

【摘要】：钢板深梁填充钢框架体系是一种新型的抗侧力结构体系,钢板深梁通过改变跨高比等参数不仅可以实现结构初始刚度能够在一定范围内调幅,而且使抗侧构件更容易安装或拆卸。以两侧加劲钢板深梁为研究对象,对其弹性屈曲性能进行了有限元分析,讨论不同加劲刚度对不同跨高比钢板深梁的加劲效果,并提出不同跨高比钢板深梁在加劲约束作用下的等效屈曲系数和嵌固系数。结果表明,跨高比越大,等效屈曲系数越小,实现屈曲模态转变所需加劲刚度越大,加劲效果越好。求得在屈曲模态转变点时,不同跨高比两侧加劲钢板深梁的加劲抗弯刚度比。提出对于跨高比在区间[0.5,1.0]的两侧加劲钢板深梁,嵌固系数可取1.23;对于跨高比在区间[1.0,2.0]时,嵌固系数取为1.0。分析结果为此类结构的抗侧设计提供了理论基础。
[Abstract]:The steel frame system filled with deep beam of steel plate is a new type of lateral force resisting structure system. By changing the ratio of span to height, the steel plate deep beam can not only realize the initial stiffness of the structure to adjust amplitude in a certain range. It also makes side-resistant components easier to install or disassemble. Based on the finite element analysis of elastic buckling behavior of stiffened steel plate deep beams on both sides, the stiffening effect of different stiffening stiffness on steel plate deep beams with different span-height ratio is discussed. The equivalent buckling coefficient and the embedding coefficient of steel plate deep beams with different ratio of span to height under stiffening constraint are presented. The results show that the greater the ratio of span to height, the smaller the equivalent buckling coefficient is, and the greater the stiffening stiffness is, the better the stiffening effect is. The ratio of stiffening bending stiffness to bending stiffness of stiffened steel plate deep beams with different ratio of span to height is obtained at the transition point of buckling mode. It is proposed that the embedded coefficient can be 1.23 for the stiffened steel plate deep beams with the span height ratio in the interval [0.5 ~ 1.0], and 1.0 for the span height ratio in the interval [1.0 ~ 2.0]. The results provide a theoretical basis for the lateral design of this kind of structures.
【作者单位】：长安大学建筑工程学院;东南大学土木工程学院;
【基金】：国家自然科学基金(50678025)
【分类号】：TU392.4

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