无对称轴冷弯薄壁型钢梁稳定承载力的设计方法研究  

Study on design method of cold-formed steel beam with no axis of symmetry section

作　　者：林冰[1] 郭朋岗 齐虎[1] 张庆昱 Lin Bing;Guo Penggang;Qi Hu;Zhang Qingyu(China State Construction Engineering Corporation Limited Technical Center,Beijing 101300,China;China Construction Modular Housing Co.Ltd,Beijing 100097,China)

机构地区：[1]中国建筑股份有限公司技术中心,北京101300 [2]中建集成房屋有限公司,北京100097

出　　处：《建筑科学》2020年第5期96-102,共7页Building Science

基　　金：国家重点研发计划“施工现场模块化设施标准化、定型化、产业化研究与示范”(2016Y FC0702102)。

摘　　要：对两种开口无对称轴冷弯薄壁型钢梁的稳定承载力进行研究,通过9组不同厚度试件的弯扭试验共计18个试件的试验,研究了该类构件的承载力及破坏模式。通过现有理论,推导出无对称轴冷弯薄壁型钢梁在横向荷载作用下的临界弯矩,给出方便设计使用的无对称轴冷弯薄壁型钢整体稳定系数的计算公式。通过计算结果与试验结果的比较,证明了推导公式的有效性。This paper mainly describes the detailed study resulted on bending carrying capacity of two kinds of cold-formed steel beam with abroach and asymmetric section. The test of 9 groups tests of torsion bending,and totally 18 specimens are carried out. Based on the current theory,the critical moment of asymmetric section under lateral loading is deduced,the formula of coefficient of integral stability is provided,and compared with tests results,the simplified formula for engineering design is determined.

关 键 词：冷弯薄壁型钢 开口非对称截面 稳定承载力 试验研究 整体稳定系数 

分 类 号：TU391[建筑科学—结构工程]