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（1 中南建筑設(shè)計(jì)院股份有限公司， 武漢 430070； 2 武漢大學(xué)土木建筑工程學(xué)院， 武漢 430072; 3 中建鋼構(gòu)有限公司， 武漢 430100)

［摘要］為考察武漢天河機(jī)場(chǎng)T3航站樓網(wǎng)架結(jié)構(gòu)中鑄鋼節(jié)點(diǎn)在最不利設(shè)計(jì)工況下的受力性能，對(duì)典型鑄鋼節(jié)點(diǎn)FLQ-35A進(jìn)行了足尺試驗(yàn)研究和有限元分析。試驗(yàn)結(jié)果表明：在1-3倍設(shè)計(jì)荷載作用下，節(jié)點(diǎn)處于彈性狀態(tài)，卸載后沒(méi)有明顯殘余變形。結(jié)果表明：有限元結(jié)果與試驗(yàn)結(jié)果吻合良好，節(jié)點(diǎn)失效破壞將從主管G1變截面處的局部塑性發(fā)展開(kāi)始；鑄鋼節(jié)點(diǎn)的極限承載力滿足《鑄鋼節(jié)點(diǎn)應(yīng)用技術(shù)規(guī)程》(CECS 235∶2008)中的相關(guān)要求，該鑄鋼節(jié)點(diǎn)具有較高的安全儲(chǔ)備。

［關(guān)鍵詞］鑄鋼節(jié)點(diǎn)； 試驗(yàn)研究； 有限元分析； 極限承載力

中圖分類號(hào)：TU393-3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

作者簡(jiǎn)介：袁理明，學(xué)士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:175848388@qq.com。