Q420大规格双角钢十字组合截面构件受力性能  

Mechanical Performance of Q420 Large-size Double-angle Steel Cross Sectional Members

作　　者：祝凯 郭耀杰[1] 孙云 邱钧钧 熊川 ZHU Kai;GUO Yao-jie;SUN Yun;QIU Jun-jun;XIONG Chuan(School of Civil Engineering of Wuhan University, Wuhan 430072, China;China Railway Siyuan Survey and Design Group Co. Ltd., Wuhan 430063, China)

机构地区：[1]武汉大学土木建筑工程学院,武汉430072 [2]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《科学技术与工程》2021年第30期13016-13023,共8页Science Technology and Engineering

基　　金：国家自然科学基金(51378401)。

摘　　要：大规格双拼组合角钢构件相对于普通规格多角钢组合截面构件,以承载力高、施工简便和耗能少等优点,逐步在工程实践中的得到了推广。以Q420大规格双角钢十字组合截面构件为对象,构建了大规格双角钢十字组合截面构件的有限元模型,采用控制变量法,探讨了填板厚度、角钢壁厚、长细比、填板间距对大规格双拼组合角钢构件承载能力的影响规律;基于不同参数的计算结果,拟合了含有填板间距和长细比的填板设计公式,进而计算了大规格双角钢十字组合截面构件的承载力稳定系数,并将计算结果与中外现行规范中的双拼角钢组合截面的柱子曲线进行了对比。结果表明:现行规范对Q420大规格双角钢十字组合截面构件承载能力的计算偏保守。Compared with ordinary multi-angle steel composite cross-section members,large-size double-split combined angle steel members have been gradually promoted in engineering practice due to their advantages of high bearing capacity,simple construction and low energy consumption.In order to discuss the influence of the thickness of the slab,the width-to-thickness ratio,the slenderness ratio,and the spacing of the slab on the load-bearing capacity of large-size double-assembled angle steel members,a Q420 large-size double-angle steel cross-section component was used as the object,and a finite element model of the large-size double-angle steel cross-section component was constructed.By using the controlled variable method and basing on the calculation results of different parameters,the design formula of the filling plate containing the spacing and slenderness ratio of the filling plate was fitted,and then the bearing capacity stability coefficient of the large-size double-angle steel cross composite section member was calculated.The calculation results were compared with the column curves of the double-piece angle steel composite section in the current domestic and foreign codes.The research results show that the current code is conservative in the calculation of the load-bearing capacity of Q420 large-size double-angle steel cross-section members.

关 键 词：高强度角钢 大规格角钢 十字组合截面 承载力 填板 稳定系数 

分 类 号：TU391[建筑科学—结构工程]