带肋圆端形钢管混凝土短柱轴压性能研究  

Research on Axial Compressive Performance of Ribbed Round-ended Rectangular Concrete-filled Steel Tubulare Short Columns

作　　者：任志刚[1] 张领 李旗 REN Zhi-gang;ZHANG Ling;LI Qi(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070

出　　处：《武汉理工大学学报》2022年第11期45-52,共8页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(51778512).

摘　　要：为探究不同加肋措施对构件轴压力学性能的影响,设计并制作了4根圆端形钢管混凝土(RRCFST)短柱,并开展轴压试验研究。运用ABAQUS对带肋RRCFST轴压短柱进行有限元模拟,并用试验数据进行了验证。在可靠的有限元模型基础上,通过参数化分析,研究不同加肋措施对构件承载力提高程度的影响,以及平直段钢管宽厚比、截面高宽比和隔板宽厚比对带隔板构件承载力提高程度的影响。结果表明:直肋、T形肋和隔板3种不同加肋措施中,加隔板对RRCFST短柱轴压承载力提高最大;当钢管平直段宽厚比分别为40、60和80时,加隔板对承载力提高程度没有影响;截面高宽比分别为2、2.5和3时,构件加隔板后构件轴压承载力分别提高11%、12%和16%;隔板宽厚比越小,构件承载力提高程度越大。In order to explore the influence of different ribbing measures on the axial compression performance of the members,four RRCFST short columns were designed and fabricated,and the axial compression test was carried out.The finite element simulation of the ribbed RRCFST short column under axial compression was carried out by ABAQUS,and the experimental data was used to verify it.The finite element model was used to study the effects of different ribbing measures,the width-thickness ratio of the straight section,the aspect ratio of the section and the width-thickness ratio of the diaphragm on the improvement of the bearing capacity of the member with the diaphragm.The results show that,among the three different ribbing measures of straight rib,T-shaped rib and clapboard,the axial compressive bearing capacity of the RRCFST short column with clapboard increases the most.When the width to thickness ratios of the straight section of the steel pipe are 40,60and 80,respectively,the addition of separators has no effect on the improvement of the bearing capacity.When the cross-section height to width ratios are 2,2.5and 3,respectively,the axial compressive bearing capacity of the member with clapboard is increased by 11%,12%and 16%respectively.The smaller the width-tothickness ratio of the partition is,the greater the improvement of the bearing capacity of the member is.

关 键 词：加劲肋 圆端形钢管混凝土 轴压承载力 

分 类 号：TU398.9[建筑科学—结构工程]