（1 中南建筑设计院股份有限公司， 武汉 430070； 2 武汉大学土木建筑工程学院， 武汉 430072; 3 中建钢构有限公司， 武汉 430100)

［摘要］为考察武汉天河机场T3航站楼网架结构中铸钢节点在最不利设计工况下的受力性能，对典型铸钢节点FLQ-35A进行了足尺试验研究和有限元分析。试验结果表明：在1-3倍设计荷载作用下，节点处于弹性状态，卸载后没有明显残余变形。结果表明：有限元结果与试验结果吻合良好，节点失效破坏将从主管G1变截面处的局部塑性发展开始；铸钢节点的极限承载力满足《铸钢节点应用技术规程》(CECS 235∶2008)中的相关要求，该铸钢节点具有较高的安全储备。

［关键词］铸钢节点； 试验研究； 有限元分析； 极限承载力

中图分类号：TU393-3文献标识码：A文章编号：1002-848X(2018)19-0050-05

Experimental study on mechanical behavior of cast steel joints in T3 terminal of Wuhan Tianhe International Airport

Yuan Liming1, Yin Pengfei1, 2, Du Xinxi2, Yang Hao1,2, Yuan Huanxin2, Wang Cong3

(1 Central-South Architectural Design Institute Co.,  Ltd.,  Wuhan 430070, China; 2 School of Civil Engineering, Wuhan University, Wuhan 430072, China; 3 China Construction Steel Structure Co.,  Ltd.,  Wuhan 430100, China)

Abstract:In order to study the mechanical behavior under the most unfavorable design conditions of the cast steel joints in the grid structure in T3 terminal of Wuhan Tianhe International Airport, full-scale loading test and finite element analysis were conducted on the typical cast steel joint FLQ-35A. Based on the test results, it can be found that the cast steel joint exhibits elastic behavior under 130% design load condition. There was no obvious residual deformation after unloading. It shows that the results of experiment and finite element analysis agree well with each other. The local plastic development at the variable cross-section of G1 pipe resulted in the failure of the joint. The  ultimate bearing capacity of the cast steel joint meets the relevant requirements in the Technical specification for application of connections of structural steel casting (CECS 235∶2008). The designed cast steel joint has a relatively high strength reserve.

Keywords:cast steel joint; experimental study; finite element analysis; ultimate bearing capacity

作者简介：袁理明，学士，高级工程师，一级注册结构工程师，Email:175848388@qq.com。