7A04铝合金圆管构件轴压稳定性研究  

Stability of 7A04 Aluminum Alloy Circular Tubes Under Axial Compression

作　　者：李振宇[1,2] 王衬心 李进军[3] 丁永军 荣彬[1,2] Li Zhenyu;Wang Chenxin;Li Jinjun;Ding Yongjun;Rong Bin(Key Laboratory of Coast Civil Structure and Safety of Ministry of Education(Tianjin University),Tianjin 300072,China;School of Civil Engineering,Tianjin University,Tianjin 300072,China;Tianjin University Research Institute of Architectural Design,Tianjin 300073,China)

机构地区：[1]滨海土木工程结构与安全教育部重点实验室(天津大学),天津300072 [2]天津大学建筑工程学院,天津300072 [3]天津大学建筑设计研究院,天津300073

出　　处：《天津大学学报（自然科学与工程技术版）》2020年第10期1036-1044,共9页Journal of Tianjin University：Science and Technology

摘　　要：为研究7A04铝合金圆管构件的轴压稳定性,进行了12个试件的轴压稳定性试验,并建立了与之对应的有限元模型,通过试验验证该模型后进行了参数化分析,最后将整体轴压稳定系数的试验值、参数化分析值与根据各国规范计算的结果进行了对比.研究结果表明:12个试件均为整体弯曲失稳破坏;根据各国规范计算的整体轴压稳定系数值均低于其试验值与参数化分析值,其中我国的《钢结构设计标准》最接近,美国的新版规范最保守;根据试验及参数化分析数据提出了7A04铝合金圆管构件轴压稳定系数的建议计算公式.To assess the stability of 7A04 aluminum alloy circular tubes under axial compression,12 specimens were tested and the corresponding finite element model was established.The finite element model was verified by performing several tests.Then,parametric analysis was conducted.Finally,the experimental and parametric analysis values of the overall stability coefficient were compared with those calculated by several current design codes.Results showed that all of the specimens failed because of overall flexural buckling.Moreover,the values of the overall stability coefficient calculated by current design codes were lower than the experimental and parametric analysis values of the overall stability coefficient,among which the design codes for steel structures in China were the closest,whereas the new design codes in the United States were the most conservative.On the basis of the experimental and parametric analysis data,the formula for calculating the axial compression stability coefficient of 7A04 aluminum alloy circular tubes was proposed.

关 键 词：7A04铝合金 圆管构件 轴压稳定性试验 有限元模型 计算公式 

分 类 号：TU395[建筑科学—结构工程]