压型钢板翼缘卷曲分析及设计建议  

Analysis and design suggestion of profiled steel sheet with flange curling

作　　者：钟炜辉[1] 罗彩虹[1,2] 郝际平[1] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]陕西同济土木建筑设计有限公司,西安710002

出　　处：《建筑结构》2017年第15期44-48,共5页Building Structure

基　　金：国家自然科学基金青年科学基金项目(51308442)

摘　　要：受弯构件翼缘常会出现向截面中性轴弯曲的变形趋势,即所谓的翼缘卷曲现象,此现象与通常采用的截面刚周边假定矛盾。我国现行规范对受弯构件截面承载力的计算均未考虑翼缘卷曲的影响,在某些情况下可能偏不安全,尤其是对翼缘宽厚比较大的压型钢板更甚。以压型钢板为研究对象,基于Winter翼缘卷曲分析模型,并在充分借鉴当前国外相关标准的设计方法和准则的基础上,得出无需考虑翼缘卷曲对压型钢板承载能力影响的控制条件,并结合数值模拟分析和算例验证,提出满足工程设计使用的压型钢板构造要求,为《冷弯薄壁型钢结构技术规范》(GB 50018—2002)的修订提供依据。The flange of flexural member often appears to have a deformation tendency to bend to neutral section shaft,which is called flange curling,a phenomenon that is contradicted with the frequently-used assumption of section stiffness.In some cases,it tends to be unsafe that flange curling is not considered in the calculation of bearing capacity of flexural member in the current codes in China,especially for the steel sheet with large ratio of flange width to thickness. For profiled steel sheet,based on the current design methods and principles of the relevant foreign standards,the control condition of the influence of the flange curling on the bearing capacity of profiled steel sheet was figured out from the Winter flange curling analysis model. Then,combining the control conditions with the validation through finite element model analysis and examples,constructional requirements on profiled steel sheet were proposed to meet engineering design and use. And it will provide basis for the revision of Technical code of cold-formed thin-wall steel structures（ GB 50018—2002）.

关 键 词：压型钢板 翼缘卷曲 抗弯承载力 弯曲变形 应力滞后 

分 类 号：TU398.7[建筑科学—结构工程]