内置横向插板加强空间相贯圆钢管节点受力性能研究  

Study on the Mechanical Behavior of Multi-planar Steel Tubular Joints Strengthened by Horizontal Inner Plates

作　　者：郭杰 杜新喜[1] 袁焕鑫[1] 程晓燕[1] 尹鹏飞 袁理明[2] GUO Jie;DU Xinxi;YUAN Huanxin;CHENG Xiaoyan;YIN Pengfei;YUAN Liming(School of Civil Engineering,Wuhan University,Wuhan 430072,China;Central-South Architectural Design Institute Co.,Ltd.,Wuhan 430070,China)

机构地区：[1]武汉大学土木建筑工程学院,武汉430072 [2]中南建筑设计院股份有限公司,武汉430070

出　　处：《建筑钢结构进展》2020年第4期50-56,109,共8页Progress in Steel Building Structures

基　　金：湖北省自然科学基金(2018CFB441);中央高校基本科研业务费专项资金项目(2042017gf0047)。

摘　　要：对武汉天河机场T3航站楼屋盖结构中2个典型内置横向插板加强空间相贯节点的受力性能进行了足尺破坏试验和有限元模拟研究,分析了两节点的破坏模式和应力变形发展过程,试验和有限元结果表明:2个试验节点均具有较高的安全储备,其破坏模式均为受压支管根部局部屈曲破坏。有限元软件可以较好地模拟节点的加载过程,两节点中插板的存在可提高其极限承载力,但对各自主管应力状态的影响不同,JD2试件中插板可有效改善其主管的应力集中现象,JD1试件中插板对其主管应力状态的影响较小。The mechanical behavior of multi-planar steel tubular joints strengthened by horizontal inner plate adopted in the roof structure of T3Terminal in Wuhan Tianhe International Airport is investigated by full-scale test and finite element analysis.The failure modes,the development of deformation and stress of the tested joints are obtained.Based on the obtained test and finite element analysis results,higher strength reserve is achieved by the tested tubular joints,and the failure mode is related to local buckling of the end part of compressive brace tube.The test process can be closely simulated by finite element modeling,and it is further revealed that the presence of horizontal inner plate in both joints can increase the load-carrying capacity.However,different influences on the stress in the chord of two joints are obtained.Specifically,the horizontal inner plate of JD2specimen improves the stress concentration of the chord considerably,while the horizontal inner plate in JD1specimen has negligible effect on the stress in the chord.

关 键 词：空间相贯节点 内置横向插板 足尺试验 极限承载力 有限元分析 

分 类 号：TU352.1[建筑科学—结构工程] TU392.1