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(中鐵第四勘察設(shè)計(jì)院集團(tuán)有限公司， 武漢 430063)

摘要: 江門站站房是由上部空間鋼結(jié)構(gòu)和下部鋼筋混凝土結(jié)構(gòu)組成的混合結(jié)構(gòu)體系。 空間鋼結(jié)構(gòu)包含頂部大懸挑鋼網(wǎng)架屋蓋和鋼筒殼支承屋蓋結(jié)構(gòu)，鋼筒殼支承屋蓋結(jié)構(gòu)空間尺寸大，桿件受力復(fù)雜，結(jié)構(gòu)冗余約束度不高。 為了得到整體空間鋼結(jié)構(gòu)的穩(wěn)定性能水平和抗連續(xù)倒塌能力，對(duì)整體空間鋼結(jié)構(gòu)進(jìn)行了屈曲特征值分析、非線性屈曲分析及抗連續(xù)性倒塌分析。 結(jié)果表明，鋼筒殼桿件面外計(jì)算長度系數(shù)小于 1. 6，整體空間鋼結(jié)構(gòu)具有較高的整體穩(wěn)定性和剛度，對(duì)初始缺陷不敏感；單根關(guān)鍵桿件失效后，結(jié)構(gòu)仍具有一定的抗連續(xù)倒塌能力，結(jié)構(gòu)安全可靠。

關(guān)鍵詞: 編織狀鋼筒殼；特征值分析；初始缺陷；非線性屈曲分析；拆除構(gòu)件法；抗連續(xù)性倒塌分析

中圖分類號(hào):TU398. 7 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002￣848X(2022)01￣0017￣07

DOI:10. 19701 / j. jzjg. 20200350

Stability analysis and anti￣continuous collapse analysis on complex supporting roof structure ofJiangmen Railway Station

SONG Huaijin， LIU Qiao

(China Railway Siyuan Survey and Design Group Co.， Ltd.， Wuhan 430063， China)

Abstract: The Jiangmen Railway Station is a mixed structure system composed of upper spatial steel structure and lowerreinforced concrete structure. The spatial steel structure consists of a large cantilever steel truss roof and a steelcylinder￣shell supporting roof structure， steel cylinder￣shell supporting roof structure has the characteristics of large spacesize， complex state of members under load and low degree of structural redundancy. In order to obtain the stabilityperformance level and anti￣continuous collapse of the whole spatial steel structure， buckling eigenvalue analysis， nonlinearbuckling analysis and anti￣continuous collapse analysis were carried out for the whole spatial steel structure. The resultsshow that the out￣of￣plane calculated length factor of steel cylinder￣shell members is less than 1. 6. The whole spatial steelstructure has higher integral stability and stiffness， and is not sensitive to initial defects. After a single key member fails，the structure still has a certain ability of anti￣continuous collapse， and the structure is safe and reliable.

Keywords: braided steel cylinder￣shell；eigenvalue analysis；initial defect；nonlinear buckling analysis；method ofdismantling component；anti￣continuous collapse analysis

第一作者:宋懷金，博士，教授級(jí)高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，主要從事高層復(fù)雜結(jié)構(gòu)、空間大跨結(jié)構(gòu)、減隔震技術(shù)等研究，Email: 78275081@ qq. com。

[引用本文] 宋懷金，劉橋. 江門站復(fù)雜支承屋蓋結(jié)構(gòu)穩(wěn)定及抗連續(xù)性倒塌分析[ J]. 建筑結(jié)構(gòu)，2022，52( 1):17￣23. SONG Huaijin， LIU Qiao. Stability analysis and anti￣continuous collapse analysis on complex supporting roofstructure of Jiangmen Railway Station [J]. Building Structure，2022，52(1):17￣23.