不同加劲的方钢管混凝土短柱轴压性能试验研究  

Experimental study on the axial compressive performance of CFST short columns with different stiffeners

作　　者：徐兵[1] 吴发红[1] 徐桂中[1] 孔海陵[1] 顾国庆[1] 于小娟[1] XU Bing;WU Fahong;XU Guizhong;KONG Hailing;GU Guoqing;YU Xiaojuan(College of Civil Engineering, Yancheng Institute of Technology, Yancheng 224055 ,China)

机构地区：[1]盐城工学院土木工程学院,江苏盐城224055

出　　处：《四川建筑科学研究》2018年第6期43-46,共4页Sichuan Building Science

基　　金：国家自然科学基金(BK20160433);住房和城乡建设部项目(2016-K8-009);江苏省自然科学基金(11502229);江苏省高校自然科学基金(18KJD560006);江苏省交通运输厅公路局项目(2017-28)

摘　　要：为改善方钢管混凝土短柱的脱空现象,提高钢管和混凝土的组合作用,本文提出了利用开孔肋加劲方钢管混凝土短柱。通过对空钢管混凝土、直肋和开孔肋加劲的钢管混凝土进行轴压试验,研究了加劲后的方钢管混凝土短柱的轴压性能和承压机理,并分析了各类试件的破坏特征、极限承载力和位移。研究结果表明:加劲后构件的钢管鼓曲形态变为双波型鼓曲;钢管和加劲件为核心混凝土提供了更可靠的约束;混凝土受压破坏部位范围更大;短柱的极限承载力均得到了有效的提高,直肋对承载力的影响程度更大,开孔肋则对构件的变形影响更大。In order to limit the void of square concrete filled steel tube short columns,strengthen the combined action of steel tube and concrete,a reinforcing method of stiffening rib with holes was put forward in this paper.Study the axial compression performance and mechanism,and analyzed the failure characteristics,the ultimate bearing capacity and the displacement ductility by the axial loading test.The result of stiffening members shows that the buckling model change into double-wave,steel tube and stiffener provide more reliable constraints for core concrete,the area of concrete damage is larger,the ultimate bearing capacity has been improved effectively.The direct rib has more influence on the bearing capacity,and the ribs with holes have more influence on the deformation of the tube.

关 键 词：钢管混凝土短柱 加劲肋 轴压承载力 

分 类 号：TU398.1[建筑科学—结构工程]