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楊學(xué)林¹，周平槐¹，趙陽(yáng)²

（1 浙江省建筑設(shè)計(jì)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游泳館屋蓋東西對(duì)稱，屋蓋曲面依建筑造型確定。采用變截面箱型鋼梁結(jié)構(gòu)體系，最大跨度為56.8m，兩側(cè)懸挑最大跨度為28.7m，入口處最大懸挑跨度為21.0m。選擇其中跨度最大的一榀鋼曲梁，比較梁?jiǎn)卧Ｐ秃桶鍐卧Ｐ徒Ｓ?jì)算的異同，然后用梁?jiǎn)卧⒄w分析模型，分析比較了屋面鋼結(jié)構(gòu)單體模型和上下部分總裝模型計(jì)算結(jié)果的不同。結(jié)果表明，因建筑效果而設(shè)置的中間兩榀縱向鋼梁，由于跨度過(guò)大而無(wú)法作為橫向鋼梁的支承點(diǎn)；設(shè)置加勁板可有效提高翼緣或者腹板抵抗局部屈曲的能力；因?yàn)閱误w模型中已包含鋼柱，且屋蓋與下部混凝土僅通過(guò)16根立柱相連，所以鋼結(jié)構(gòu)單體模型和上下總裝模型的結(jié)果相近。

［關(guān)鍵詞］變截面；箱形鋼梁；梁?jiǎn)卧?；殼單元；單體模型；總裝模型；局部屈曲

中圖分類號(hào)：TU 393.3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2012)08-0015-04

 

Yang Xuelin¹, Zhou Pinghuai¹, Zhao Yang²

(1 Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China;2 Space Structures Research Center, Zhejiang University, Hangzhou 310058, China)

 

Abstract: The steel roof of the natatorium in Nantai Lake Olympic Wetland Park is on west-east symmetry, which is determined by the architectural modeling. The roof is composed by variable cross-section steel beam with box shape system, and the maximum span is 56.8m long, with the 28.7m cantilever span in the both sides and 21.0m in the entrance. The beam element and the shell element model of the longest-span beam are created respectively and the results are compared. In addition, both the roof structure by the beam element and the whole structure including the below concrete structure are modeled. Because of the long span, the two middle longitudinal beams set according to the architectural shape can not support the transverse beams. The capacity of flanges and webs to resist local buckling is improved significantly by the stiffened plates. For roof structure including the 16 columns, the results of two structural models are quite close.

Keywords: variable cross-section; steel box beam; beam; shell; roof structure; whole structure; local buckling

作者簡(jiǎn)介：楊學(xué)林，工學(xué)博士，教授級(jí)高級(jí)工程師，院總工程師，Email: yangxuelin@ziad.cn。

 

［1］浙江大學(xué)建筑工程學(xué)院.湖州南太湖濕地奧體公園游泳館風(fēng)壓風(fēng)洞試驗(yàn)報(bào)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游泳館風(fēng)振計(jì)算報(bào)告［R］.2011.

［3］GB 50017—2003鋼結(jié)構(gòu)設(shè)計(jì)規(guī)范 ［S］.北京:中國(guó)計(jì)劃出版社,2003.

［4］傅學(xué)怡,高穎,楊想兵.總裝分析對(duì)大跨空間結(jié)構(gòu)設(shè)計(jì)的重要性［J］.空間結(jié)構(gòu),2009，15(1)：3-10.