横梁荷载作用下单层无侧移刚架的稳定承载力

发布时间：2018-02-26 21:20

本文关键词： 单层刚架无侧移刚架弹性屈曲计算长度压弯构件　出处：《建筑结构学报》2016年07期 　论文类型：期刊论文

【摘要】：分析刚架稳定性能时,常把横梁上的荷载集中于柱顶,这对单层无侧移刚架可能产生较大误差。为推导出合乎刚架实际性能的实用设计方法,首先进行刚架的弹性稳定分析,明确失稳是渐近极值型的。由于失稳时变形过大,不应用其临界荷载来确定柱的计算长度。其次对刚架水平推力是否需要二阶分析进行探讨,结论是否定的。再次,对弱梁刚架和弱柱刚架两种典型情况进行分析,明确设计规范采用的传统设计方法可以用于这类刚架设计,只是必须考虑水平推力的影响。文中强调了把无侧移刚架分为弱梁刚架和弱柱刚架的必要性,给出刚架类型的判别式和弱梁刚架的易位计算法。
[Abstract]:When analyzing the stability of rigid frame, the load on the beam is usually concentrated on the top of the column, which may cause great error to the single-layer frame without lateral displacement. In order to deduce the practical design method which accords with the actual performance of the rigid frame, the elastic stability analysis of the frame is carried out first. It is clear that the instability is asymptotically extreme. Due to the excessive deformation during the instability, the calculated length of the column is not determined by its critical load. Secondly, the second order analysis of the horizontal thrust of the rigid frame is discussed, and the conclusion is negative. Two typical cases of weak beam rigid frame and weak column rigid frame are analyzed. It is clear that the traditional design method used in the design code can be used in the design of this kind of rigid frame. In this paper, the necessity of dividing the rigid frame without lateral shift into weak beam frame and weak column rigid frame is emphasized, and the discriminant of rigid frame type and the translocation calculation method of weak beam rigid frame are given.
【作者单位】：西安建筑科技大学结构工程与抗震教育部重点实验室;
【基金】：“十二五”国家科技支撑计划(2013BAJ10B03-0)
【分类号】：TU328

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