花瓣形钢管混凝土柱轴压受力机理和承载力研究  

The Axial Compression Mechanism and Load Capacity of Petal-Shaped Concrete-Filled Steel Tubular Columns

作　　者：张涛 甘丹[1] 李扬 黄辉辉 黄尚斌 ZHANG Tao;GAN Dan;LI Yang;HUANG Huihui;HUANG Shangbin(School of Civil Engineering,Chongqing University,Chongqing 400045,China;Sichuan Provincial Architectural Design and Research Institute Co.,Ltd.,Chengdu 610095,China;Guangdong Architectural Design and Research Institute Co.,Ltd.,Guangzhou 510010,China;Topchain Link Operation Management Co.,Ltd.,Guangzhou 510315,China)

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]四川省建筑设计研究院有限公司,成都610095 [3]广东省建筑设计研究院有限公司,广州510010 [4]同创汇运营管理有限公司,广州510315

出　　处：《建筑钢结构进展》2024年第3期70-79,共10页Progress in Steel Building Structures

基　　金：国家自然科学基金(52378133);重庆市自然科学基金(CSTB2023NSCQ-MSX0758)。

摘　　要：花瓣形钢管混凝土柱具有造型美观的优点,为具体研究其受力机理和承载力,定义了其截面组成,提出了截面偏移比和截面对称系数以反映花瓣形截面性质,提出在花瓣柱中设置十字形加劲肋以增强其组合效应。基于某工程中墩柱和有限元模型,研究了花瓣形钢管混凝土短柱在轴压荷载作用下的受力机理,分析了加劲肋厚度、混凝土强度、钢材强度、加劲肋开孔直径和间距等参数对轴压性能的影响,研究了加劲肋厚度与钢管壁厚的匹配关系。根据理论分析和大量有限元参数分析结果,建议了加劲肋厚度与钢管壁厚之比和钢管名义径厚比的取值范围,提出了花瓣形钢管混凝土短柱的轴压承载力计算式。Petal-shaped concrete-filled steel tubular(CFST)columns are aesthetically appealing.The cross-sectional composition of petal-shaped CFST columns was defined.The section offset ratio and section symmetry coefficient were proposed to identify the cross-section properties of the petal shape.Cross stiffeners were proposed to improve the composite effect.Based on pier columns in an engineering project and a verified finite element model,the loadresisting mechanisms of petal-shaped CFST stub columns under axial compression was studied.The influence of the stiffener thickness,concrete strength,steel strength,opening diameter and spacing of the stiffener were investigated.The matching relationship between the thickness of the stiffener and steel tube was studied.Based on the theoretical analysis and extensive finite element analysis results,the stiffener thickness to steel tube wall thickness ratio and the nominal tube diameter to thickness ratio were quantitatively suggested.The calculation formulas of axial load-carrying capacity of petal-shaped CFSTs were proposed.

关 键 词：花瓣形钢管混凝土柱 组合效应 多腔钢管混凝土 加劲肋 有限元分析 

分 类 号：TU398.9[建筑科学—结构工程]