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(1 同濟(jì)大學(xué)土木工程學(xué)院  上海 200092；2 華東建筑設(shè)計研究院  上海 200092)
【提要】  東方藝術(shù)中心玻璃幕墻單層網(wǎng)格鋼結(jié)構(gòu)支撐體系由形似花瓣的5個獨立的橢球形單層網(wǎng)格桿系(立柱、橫桿、支撐及索網(wǎng))結(jié)構(gòu)組成，此網(wǎng)格結(jié)構(gòu)作為墻體垂直放置，比較特殊。對該結(jié)構(gòu)進(jìn)行線性穩(wěn)定、無初始缺陷結(jié)構(gòu)非線性穩(wěn)定和有初始缺陷結(jié)構(gòu)非線性穩(wěn)定分析。豎向放置的網(wǎng)格鋼結(jié)構(gòu)的失穩(wěn)模態(tài)為結(jié)構(gòu)中下部壓潰失，風(fēng)向?qū)Ψ€(wěn)定極限荷載有影響。宜采用彈塑性極限荷載來評價結(jié)構(gòu)，同時考慮初始缺陷的影響。
【關(guān)鍵詞】  單層網(wǎng)格結(jié)構(gòu)  非線性穩(wěn)定  幕墻  初始缺陷
Stability Behavior of a Large Scale Singlelayer Reticulated Curtainwall Structure/Tang Rongwei1,Shen Zuyan 1,Luo Yongfeng1,Su Ci1,Zhang Weiyu2,Wang Dasui2
(1 Department of Civil Engineering,Tongji University,Shanghai 200092,China；2 East China Architectural Design & Research Institute Co.,Ltd.,Shanghai 200092,China)
Abstract:The stability behavior of a large scale singlelayer reticulated curtainwall structure used in east art center of Shanghai is analysed.The curtainwall structure is composed of five vertical ellipsoid grid shells.ANSYS is used to analyse the the stability behavior.The linear buckling,geometrical nonlinear buckling of the perfect and imperfect structure and elastoplastic buckling are analysed and compared.The compression bucking in the centre portion and below it is the bucking mode of the vertical reticulated curtainwall structure.The wind angle has influence on limit load.The elastoplastic limit load should be chosen to evaluate the structure and the initial flaw should be taken into account.
Keywords:singlelayer reticulated structure;nonlinear stability;curtainwall;imperfection