大宽厚比矩形钢管混凝土柱纵向加劲肋构造研究现状  

Research on the Longitudinal Stiffener of Rectangle Concrete Filled Steel Columns with Large Width to Thickness Ratio

作　　者：刘源[1] 罗金辉[1] 李元齐[1] 傅学怡[1,2] LIU Yuan;LUO Jinhui;LI Yuanqi;FU Xueyi(College of Civil Engineering, Tongji University, Shanghai 200092, China;CCDI International （Shenzhen） Design Consultants, Co., Ltd., Shenzhen 518048, China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]悉地国际设计顾问(深圳)有限公司,广东深圳518048

出　　处：《建筑钢结构进展》2018年第3期1-10,共10页Progress in Steel Building Structures

基　　金：国家自然科学基金(51208375)

摘　　要：超大截面矩形钢管混凝土柱具有较高的极限承载力。现行相关规范对管壁宽厚比的要求在保证管壁局部屈曲性能的同时,限制了对构件含钢率的进一步优化。在钢管壁内侧设置纵向加劲肋,可有效提高其局部屈曲性能,降低构件的用钢量,充分发挥高强钢的性能。对国内外有关管壁局部屈曲的产生机理和宽厚比限值等方面的研究成果进行了归纳总结,对国内外有关纵向加劲肋对大宽厚比钢管混凝土柱静力承载性能和抗震性能影响、加劲肋和子板件构造要求等方面的试验和理论研究进行了比较分析。基于上述工作,提出了以控制管壁局部屈曲为目标的纵向加劲肋构造设置原则及其作用机理,以及设加劲肋的大宽厚比钢管混凝土柱承载力计算等需要深入研究的方向。Large scale rectangle concrete-filled steel columns have high load capacity. The limitation on the ratio of width to thickness of panels is applied to prevent local bulking in many design standards. Adding longitudinal stiffeners to the inner face of panels has been proven a useful method to enhance the local bulking performance of components, so the high strength steel can be fully utilized. In this paper, theoretical study is firstly conducted on the local buckling for panels. The limitations on ratio specified in design standards are compared, and the impacts are emphasized about the stiffener on critical local buckling stress. Then current experimental and theoretical studies are summarized about the effect of longitudinal stiffeners on the static load, seismic beha,/ior and requirements of sub panels. Based on the above studies,the paper proposes a new load capacity calculation method and a new design principle of stiffener section or multi-longitudinal stiffeners for postponing local buckling of panels. In the end, a recommendation is provided on the interactive mechanism between stiffeners, panels and concrete.

关 键 词：钢管混凝土柱 局部屈曲 纵向加劲肋 大宽厚比 抗弯刚度 

分 类 号：TU398[建筑科学—结构工程]