翼缘变厚度截面的自由扭转刚度和翘曲刚度  

FREE AND WARPING TORSION RIGIDITIES OF HOT-ROLLED SECTIONS WITH TAPERED FLANGE THICKNESS

作　　者：陈威文 童根树[2] 张磊[2] 

机构地区：[1]华汇工程设计集团股份有限公司,浙江绍兴312000 [2]浙江大学高性能材料与结构研究所,杭州310058

出　　处：《工业建筑》2013年第4期19-21,27,共4页Industrial Construction

基　　金：国家十二五支撑计划项目(2012BAJ13B00)

摘　　要：对翼缘变厚度的热轧工字形截面和热轧槽钢截面的翘曲刚度进行推导,得到计算公式,参照型钢表列出计算表格。结果表明,相对于按照等厚度翼缘计算的翘曲惯性矩,考虑变截面影响的翘曲惯性矩有较大幅度下降,其中热轧槽钢的翘曲惯性矩下降13%～18%;热轧工字钢的翘曲惯性矩下降16%～22%。同时列出了所有系列的热轧槽钢和热轧工字钢截面的翘曲惯性矩,也给出考虑翼缘厚度变化的截面的自由扭转常数的计算公式。It was derived the warping and free torsional rigidities of hot-rolled steel cross-sections with flanges of tapered thickness. Tables were provided to find these properties of all hot-rolled sections available in China. It was found that the warping inertia moments of hot-rolled channels are 13% - 18% smaller than channels with assumed uniform thickness, and those of hot-rolled I sections were 16% - 22% smaller than I-sections with uniform thickness. The warping inertia moments of all the series of hot-rolled channels and I sections were listed, and the formulas for calculating the free torsional constants of the sections considering the change in flange thickness were also given.

关 键 词：翘曲惯性矩 自由扭转常数 薄壁杆件 

分 类 号：TU391[建筑科学—结构工程]