薄壁异形铝合金轴压构件畸变屈曲性能试验研究  

Experimental Study on the Distortional Buckling Behavior of Thin-Walled Irregular-Shaped Aluminum Alloy Members Under Axial Compression

作　　者：高庆水 常熤存 胡树青 田河 张楚 孙强 胡险峰 GAO Qingshui;CHANG Yicun;HU Shuqing;TIAN He;ZHANG Chu;SUN Qiang;HU Xianfeng(Electric Power Research Institute,Guangdong Power Grid Corporation,Guangzhou 510080,China;Zhongtong Steel Structure Co.,Ltd.,Liaocheng 250002,China;Qingdao Urban Construction Group Co.,Ltd.,Qingdao 266031,China)

机构地区：[1]广东电网有限责任公司电力科学研究院,广州510080 [2]中通钢构股份有限公司,山东聊城250002 [3]青岛城建集团有限公司,山东青岛266031

出　　处：《建筑钢结构进展》2019年第6期97-106,113,共11页Progress in Steel Building Structures

基　　金：广东电力科学研究院资助项目(GDKJQQ20153008)

摘　　要：进行了6个薄壁异形截面铝合金短柱轴压作用下畸变屈曲性能的试验研究。采用LVDT测量了试件的局部几何初始缺陷,得到了该类构件局部几何初始缺陷的形状和幅值。进行了4组铝合金试样的拉伸试验,得到了6063-T5铝合金的本构关系。在薄壁异形截面铝合金短柱的轴压试验中,记录了各构件的轴向位移、板件平面外位移、应变和荷载等数据,分析了畸变屈曲对试件极限承载力、变形和应变发展等的影响。建立了薄壁异形截面铝合金轴压构件的有限元模型,并将有限元模拟得到的构件承载力、破坏模态、应变发展以及变形情况等结果与试验结果进行了对比,验证了该有限元模型的准确性。Six irregular-shaped aluminum alloy short columns were tested under axial compression to study their distortional buckling behavior.Initial local geometric imperfection was measured by LVDT to obtain its shape and amplitude.Four groups of tensile couple tests were performed to obtain the stress-strain curves of 6063-T5 aluminum alloy.Axial displacement,out-of-plane displacement,strain and load of each test specimen were measured during the axial compression test,in order to investigate the influence of distortional buckling on ultimate strength,deformation,and strain development of the test specimens.A finite element model for axially-loaded aluminum alloy column was established and subsequently verified by the test result.Ultimate strength,failure mode,strain development and deformation of the test specimens obtained from test and finite element analysis were compared to validate the finite element model.

关 键 词：铝合金轴压构件 薄壁异形截面 畸变屈曲 试验研究 有限元模拟 

分 类 号：TU395[建筑科学—结构工程]