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（天津大學(xué)建筑工程學(xué)院, 天津 300072）
［摘要］結(jié)合某體育館鋼結(jié)構(gòu)屋蓋工程，采用了由中部雙層網(wǎng)殼和外圍單層網(wǎng)殼形成的支承于周邊立柱的組合網(wǎng)殼結(jié)構(gòu)。通過(guò)整體結(jié)構(gòu)的有限元分析，證明在外荷載作用下，結(jié)構(gòu)整體剛度較好，邊界約束方式對(duì)其無(wú)顯著影響，結(jié)構(gòu)的力流方向以沿短跨方向傳遞為主。雙層網(wǎng)殼、單層網(wǎng)殼和外圍立柱組合形成協(xié)同工作狀態(tài)。剛度較大的雙層網(wǎng)殼對(duì)整體結(jié)構(gòu)剛度無(wú)明顯提高作用，整體結(jié)構(gòu)的剛度取決于雙層網(wǎng)殼的下部支承結(jié)構(gòu)。
［關(guān)鍵詞］組合網(wǎng)殼；單層網(wǎng)殼；雙層網(wǎng)殼；變截面箱形；承力機(jī)制；協(xié)同工作；空間剛度
Integral structural analysis on the roof of composite reticulated shell
Rong Bin, Chen Zhihua(School of Civil Engineering, Tianjin University, Tianjin 300072, China)
Abstract:Based on characteristics of a stadium project, the roof of composite reticulated steel shell including external single-layer shell component and central double-layer shell component is designed. The whole roof is supported by tapered steel columns. Based on the finite element analysis of the whole roof, it is proved that the whole roof has a better stiffness under the structural loads and the border bound manners have no significant effect on the stiffness of the roof. The bearing mechanism is mainly dependent on the short span of the whole roof. Single-layer shell component, double-layer shell component and tapered columns are in collaborative work status. The stiffness of the roof is mainly dependent on single-layer shell component and tapered columns.
Keywords:composite reticulated shell; single-layer shell; double-layer shell; tapered section; bearing mechanism; collaborative work; spatial stiffness
*國(guó)家自然科學(xué)基金項(xiàng)目（50778122）；新世紀(jì)優(yōu)秀人才支持計(jì)劃（2006）。
作者簡(jiǎn)介：榮彬，博士研究生，Email:tjerobin@126.com。
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