Bending tests and finite element analysis of lipped channels with complex edge stiffeners and web stiffeners  

作　　者：王春刚 张壮南 贾连光 于欣永 

机构地区：[1]School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China

出　　处：《Journal of Central South University》2017年第9期2145-2153,共9页中南大学学报（英文版）

基　　金：Project(51008200)supported by the National Natural Science Foundation of China;Project(2015020575)supported by Natural Science Foundation of Liaoning Province,China;Project(F16-205-1-14)supported by Science and Technology Program of Shenyang City,China

摘　　要：In order to study the bearing capacity and stability behavior of cold-formed steel flexural members with complicated sections,a total of 12 specimens divided into 6 groups were tested,including 3 groups of pure bending tests and non-pure bending tests each.There were three types of sections considered in this investigation,including channels with complex edge stiffeners(called B1-section),Σsection with complex edge stiffeners(called B2-section),and channels with complex edge stiffeners and V-type web stiffeners(called B3-section).Local buckling,distortional buckling and interaction buckling between them were observed in tests.The experimental results indicate that the bending strengths of B2-section specimens were the largest of these three types of specimens under the same conditions.It is found that the bending strength of B2-section specimens was increased by 6.47%for pure bending state and 8.12%for non-pure bending state,compared with that of B1-section specimens.Bending strength of B3-section specimens was almost the same with that of B1-section specimens under pure bending,but a little smaller than that of B1-section under non-pure bending state.It is also shown that B2-section specimens have better plastic deformation behavior than the other two sections.In addition,a non-linear finite element model was presented and verified against tests.The finite element analysis results agree well with experimental bending strength and failure modes.In order to study the bearing capacity and stability behavior of cold-formed steel flexural members with complicated sections,a total of 12 specimens divided into 6 groups were tested,including 3 groups of pure bending tests and non-pure bending tests each.There were three types of sections considered in this investigation,including channels with complex edge stiffeners（called B1-section）,Σsection with complex edge stiffeners（called B2-section）,and channels with complex edge stiffeners and V-type web stiffeners（called B3-section）.Local buckling,distortional buckling and interaction buckling between them were observed in tests.The experimental results indicate that the bending strengths of B2-section specimens were the largest of these three types of specimens under the same conditions.It is found that the bending strength of B2-section specimens was increased by 6.47%for pure bending state and 8.12%for non-pure bending state,compared with that of B1-section specimens.Bending strength of B3-section specimens was almost the same with that of B1-section specimens under pure bending,but a little smaller than that of B1-section under non-pure bending state.It is also shown that B2-section specimens have better plastic deformation behavior than the other two sections.In addition,a non-linear finite element model was presented and verified against tests.The finite element analysis results agree well with experimental bending strength and failure modes.

关 键 词：cold-formed steel channels with complex edge stiffeners web stiffeners bending strength BUCKLING 

分 类 号：TU392.1[建筑科学—结构工程]