南太湖濕地奧體公園體育場屋蓋鋼結(jié)構(gòu)設(shè)計
楊學(xué)林1，趙陽2，周平槐1，王震2
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楊學(xué)林1，趙陽2，周平槐1，王震2（1 浙江省建筑設(shè)計研究院，杭州 310006；2 浙江大學(xué)空間結(jié)構(gòu)研究中心，杭州 310058）［摘要］南太湖濕地奧體公園體育場外形如同百合花，采用疊合開口雙層網(wǎng)殼結(jié)構(gòu)體系，由高低兩個屋面疊合而成。屋蓋鋼結(jié)構(gòu)與下部鋼筋混凝土看臺部分完全脫開，全都支承在標(biāo)高6.500m的觀眾室外平臺上。在屋蓋懸挑端設(shè)置觀光走廊。由于屋蓋鋼結(jié)構(gòu)中間開橢圓形洞口，周邊六個入口部分同樣對屋蓋有削弱作用，所以高低屋面各自單獨受力時無法滿足承載要求，必須通過高低屋面之間的腹桿將之連接成一個整體受力。分別介紹了內(nèi)力分析、特征值屈曲分析、幾何非線性分析、幾何材料雙重非線性分析、以及典型相貫節(jié)點有限元分析的結(jié)果，考慮了半跨活荷載的不利影響。分析表明，該屋蓋鋼結(jié)構(gòu)具有較好的整體穩(wěn)定性；對于初始缺陷不敏感；當(dāng)網(wǎng)殼的最大豎向位移超過1m后，較多桿件進入屈服狀態(tài)，需要通過雙重非線性分析才能獲得接近實際的穩(wěn)定承載力。［關(guān)鍵詞］雙層網(wǎng)殼；結(jié)構(gòu)體系；高低屋面；懸挑端；環(huán)向觀光走廊；典型相貫節(jié)點；雙重非線性中圖分類號：TU 391.4文獻標(biāo)識碼：A文章編號：1002-848X(2012)08-0001-07Structural design on steel roof of the stadium in Nantai Lake Olympic Wetland ParkYang Xuelin1, Zhao Yang2, Zhou Pinghuai1, Wang Zhen2(1 Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China;2 Space Structures Research Center, Zhejiang University, Hangzhou 310058, China)Abstract: The stadium in Nantai Lake Olympic Wetland Park which looks like a lily, adopts the structure system of two-layer shell with openings that composed by the high and low roof. The whole steel roof separates from the lower reinforced concrete stand part, and supports on the outside audience platform with the elevation 6.500m. Especially there is a ring tourist corridor on the cantilever end of the roof. The structural behavior of this system is analyzed. It is hard to satisfy the bearing capacity for the only high or low steel roof, just because the elliptical openings is set in the center and six entrances. Therefore the web members between the high and low roof are very important to form an overall structure. From the results of inner-force analysis, eigenvalue buckling analysis, geometric or material nonlinear analysis, considering the adverse effects of-a half-cross live load, it shows that the stability behavior is very good for the steel roof which is not sensitive to the initial imperfections. The typical welded joints were analyzed by the finite element method. After the maximum vertical displacement exceeds 1m, many members yield, so the geometric and material nonlinear analysis must be adopted to approach that of real stability state and capacity of the structure.Keywords: two-layer shell; opening structural system; high and low roof; cantilever end; ring tourist corridor; typical welded joint; double nonlinear analysis參考文獻［1］浙江大學(xué)建筑工程學(xué)院.湖州南太湖濕地奧體公園體育場風(fēng)壓風(fēng)洞試驗報告［R］.2011.［2］浙江大學(xué)建筑工程學(xué)院.湖州南太湖濕地奧體公園體育場風(fēng)振計算報告［R］.2011.［3］GB 50011—2001建筑抗震設(shè)計規(guī)范［S］.2008年版.北京:中國建筑工業(yè)出版社,2008.［4］GB 50223—2008建筑工程抗震設(shè)防分類標(biāo)準(zhǔn)［S］.北京:中國建筑工業(yè)出版社,2008.［5］GB 50017—2003鋼結(jié)構(gòu)設(shè)計規(guī)范 ［S］.北京:中國計劃出版社,2003.［6］JGJ 7—2010空間網(wǎng)格結(jié)構(gòu)技術(shù)規(guī)程［S］.北京:中國建筑工業(yè)出版社,2010.［7］沈世釗,陳昕.網(wǎng)殼結(jié)構(gòu)穩(wěn)定性［M］.北京:科學(xué)出版社,1999.
