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（1 華東建筑設(shè)計(jì)研究院有限公司，上海 200002； 2 同濟(jì)大學(xué)，上海 200092)
［摘要］浦東國(guó)際機(jī)場(chǎng)T2航站樓主樓鋼結(jié)構(gòu)屋蓋采用的Y形柱的穩(wěn)定性能對(duì)整體結(jié)構(gòu)的安全至關(guān)重要。通過對(duì)整體結(jié)構(gòu)進(jìn)行彈塑性大位移穩(wěn)定性分析，針對(duì)Y形柱在不同荷載作用組合下的不同受力特點(diǎn)，采用考慮雙折線材料模型、大位移幾何非線性和初始幾何缺陷的非線性計(jì)算方法，全面分析了豎向靜力荷載下，X向和Y向水平地震作用下Y形柱的整體穩(wěn)定性能。分析結(jié)果表明鋼屋蓋的Y形柱具有良好的穩(wěn)定性能，是安全可靠的。
［關(guān)鍵詞］鋼屋蓋結(jié)構(gòu)；Y形柱；穩(wěn)定性分析；極限承載力
Research on stability of the Y-shape column in roof structure of Shanghai Pudong International Airport T2
Zhang Yaokang1, Shi Zhishen1, Zhou Jian1, Luo Yongfeng2 (1 East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China; 2 Tongji University, Shanghai 200092, China)
Abstract:The stability of the Y-shape column is vital to the safety of the whole roof structure of Shanghai Pudong International Airport T2. Elasto-plastic large displacement stability analysis of the whole structure is carried out. According to different force feature of the Y-shape column under different load combinations, specific calculation methods are adopted to generally analyze the stability performance of the Y-shape column under vertical static load, X and Y direction earthquake. It is shown that the stability performance of the Y-shape column is well and the structure is safe and reliable.
Keywords:steel roof structure; Y-shape column; stability analysis; ultimate bearing capacity
作者簡(jiǎn)介：張耀康，副主任工程師，Email:yaokang_zhang@ecadi.com。
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