大跨度網(wǎng)架與下部支承結(jié)構(gòu)協(xié)同作用分析
趙永全，任玉賀，任源
- 摘 要
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（上海弘城國際建筑設(shè)計(jì)有限公司，上海 200082）［摘要］結(jié)合結(jié)構(gòu)體系為鋼網(wǎng)架-鋼筋混凝土框剪混合結(jié)構(gòu)的實(shí)際工程項(xiàng)目，充分考慮網(wǎng)架與下部支承結(jié)構(gòu)的協(xié)同作用，采用MIDAS/Gen軟件建立鋼網(wǎng)架與下部鋼筋混凝土結(jié)構(gòu)的整體分析模型，進(jìn)行反應(yīng)譜分析與彈性時(shí)程分析，并對(duì)兩次計(jì)算的結(jié)果進(jìn)行對(duì)比及包絡(luò)設(shè)計(jì)，精確提取網(wǎng)架各支座節(jié)點(diǎn)的內(nèi)力與位移。將各節(jié)點(diǎn)力和位移精確地施加在由SATWE軟件建立的鋼筋混凝土結(jié)構(gòu)單體模型和由MIDAS/Gen軟件建立的單獨(dú)網(wǎng)架模型上，對(duì)單體模型和單獨(dú)網(wǎng)架模型進(jìn)行分析計(jì)算。并將整體模型的計(jì)算結(jié)果與單體模型和單獨(dú)網(wǎng)架模型的計(jì)算結(jié)果進(jìn)行對(duì)比。結(jié)果表明，鋼筋混凝土結(jié)構(gòu)可以采用單體模型進(jìn)行分析計(jì)算和設(shè)計(jì)，而網(wǎng)架設(shè)計(jì)需采用整體模型以體現(xiàn)網(wǎng)架與下部支承結(jié)構(gòu)的協(xié)同作用。［關(guān)鍵詞］鋼網(wǎng)架-鋼筋混凝土框剪混合結(jié)構(gòu); 整體模型; 協(xié)同作用; 彈性時(shí)程分析; MIDAS/Gen; SATWE中圖分類號(hào)：TU398 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2014)23-0049-05Analysis on interaction between large-span grid and supporting structure of lower partZhao Yongquan, Ren Yuhe, Ren Yuan(Shanghai Grandcity International Architectural Design Co., Ltd., Shanghai 200082, China)Abstract: Combined with the practical project whose structural system is steel grid-RC frame shear wall mixed structure, considering the interaction between grid and supporting structure of lower part, whole analysis model composed of steel grid and RC structure of lower part was established by the general finite element program MIDAS/Gen to carry out the response spectrum analysis and the elastic time-history analysis. The results of two analyses were compared and envelope design was carried out. The internal force and displacement of each support node of the grid structure were accurately extracted. The extracted node force and displacement were accurately applied in single RC structure model by SATWE program and single grid model by MIDAS/Gen program and two models were calculated separately. The results of the whole model and two single models were compared. The results show that RC structure can be calculated by a single model, and the grid design should use the whole model to consider the interaction between grid and supporting structure of lower part.Keywords: steel grid-RC frame shear wall mixed structure; whole model; interaction; elastic time-history analysis；MIDAS/Gen; SATWE作者簡介:趙永全,碩士,工程師,Email:Trevor_zhao@163.com。參考文獻(xiàn)［1］陳丹, 楊維國, 趙雅, 等. 海原博物館上下部結(jié)構(gòu)協(xié)同工作性能研究［J］. 建筑結(jié)構(gòu), 2011，41(3):50-54.［2］王昌興. MIDAS/Gen應(yīng)用實(shí)例教程及疑難解答［M］. 北京: 中國建筑工業(yè)出版社, 2010.［3］董石麟, 錢若軍. 空間網(wǎng)格結(jié)構(gòu)分析理論與計(jì)算方法［M］. 北京: 中國建筑工業(yè)出版社, 2000.［4］GB 50011—2010 建筑抗震設(shè)計(jì)規(guī)范［M］.北京：中國建筑工業(yè)出版社,2010.
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