横肋波纹钢板-方钢管混凝土组合柱双向偏压力学性能研究及承载力计算  

BEHAVIOUR AND BEARING CAPACITY OF CONCRETE-FILLED HORIZONTAL CORRUGATED STEEL PLATE-TUBULAR COMPOSITE COLUMNS UNDER BI-AXIAL ECCENTRIC COMPRESSION

作　　者：张世钧 邹昀[1] 王城泉[1] 吴艺超 陈明 ZHANG Shi-jun;ZOU Yun;WANG Cheng-quan;WU Yi-chao;CHEN Ming(School of Environmental and Civil Engineering,Jiangnan University,Wuxi,Jiangsu 214122,China;Shanghai Open steel Structure Co.,Ltd.,Shanghai 200127,China)

机构地区：[1]江南大学环境与土木工程学院,江苏无锡214122 [2]上海欧本钢结构有限公司,上海200127

出　　处：《工程力学》2021年第6期81-90,共10页Engineering Mechanics

基　　金：2018年江苏省科技厅社会发展面上项目(BE2018625);江苏省自然科学基金资助项目(BK20180623);国家自然科学基金项目(51378240)。

摘　　要：为研究横肋波纹钢板-方钢管混凝土组合柱的双向偏压力学性能,对两根横肋波纹钢板-方钢管混凝土组合柱试件展开了双向偏压加载试验,探究了不同偏心距对试件在双向偏压荷载下的荷载-变形曲线、破坏模态和截面应变发展状况的影响,分析了波纹板与钢管、混凝土之间的相互作用机理。在试验基础上运用有限元模拟,分析了偏心距、加载角度、钢管厚度、波纹板厚度等多种参数对横肋波纹钢板-方钢管混凝土组合柱双向偏压荷载下承载力、延性、刚度等力学性能的影响规律,得出钢管厚度增大柱的极限承载力显著提高,加载角度对极限承载力影响不大等主要结论。最后,参考欧洲《EC4》规范钢混组合柱承载力的计算方法,提出了横肋波纹钢板-方钢管混凝土组合柱双向偏压承载力实用计算公式,以期为工程实践提供参考。In order to investigate the mechanical performance of concrete-filled horizontal corrugated steel plate-tubular composite columns under bi-axial eccentric compression,two specimens were prepared for bi-axial eccentric loading test.Load versus deformation curves,failure mode and longitudinal strain were analyzed.A reasonable explanation of interaction between corrugated plate and steel tubes and concrete were proposed.Furthermore,a finite element analysis model was established.The influence of loading,the ductility and stiffness under different eccentricities,loading angles,thickness of the steel tubes and thickness of the corrugated plates were also analyzed.It is found that with the increase of the thickness of steel tubes,the bearing capacity of columns are improved evidently.And loading angles have barely influence on the bearing capacity.Finally,based on the bearing capacity calculation formula of steel-concrete composite columns in Eurocode 4,a calculation formula of the bearing capacity under bi-axial eccentric loading is proposed,which agrees well with the finite element results and is practical in actual engineering.

关 键 词：波纹钢板 双向偏心受压 应变分析 承载力计算 有限元分析 

分 类 号：TU398[建筑科学—结构工程]