斜交梁系鋼屋蓋結(jié)構(gòu)溫度效應研究
鄭毅敏，朱偉平
- 摘 要
-
鄭毅敏，朱偉平（同濟大學建筑設計研究院(集團)有限公司， 上海 200092）［摘要］以東營會展中心超長鋼屋蓋為背景，研究斜交梁體系屋蓋結(jié)構(gòu)的溫度效應特點。闡述了樓屋蓋結(jié)構(gòu)平面內(nèi)剛度對溫度效應的影響；推導了正、斜交網(wǎng)格平面內(nèi)剛度的計算公式，通過分析比較，得到斜交網(wǎng)格平面內(nèi)剛度較小的結(jié)論，有利于減小結(jié)構(gòu)的溫度效應。利用ANSYS軟件建立正、斜交梁體系超長屋蓋結(jié)構(gòu)模型，并進行季節(jié)溫差作用下的分析，結(jié)果表明斜交梁體系溫度效應受屋蓋平面內(nèi)剛度影響大，剛度較大側(cè)的溫度效應顯著，同時亦驗證了理論分析的結(jié)論。討論了若干因素對斜交梁體系屋蓋結(jié)構(gòu)溫度效應特點的影響作用。并結(jié)合工程實際，提出若干設計要點。［關鍵詞］斜交梁體系；超長結(jié)構(gòu)；溫度效應；有限元分析；整體彎曲效應中圖分類號：TU391文獻標識碼：A文章編號：1002-848X(2012)09-0107-07Research on the temperature effect of diagonal-crossing beam steel roof structureZheng Yimin, Zhu Weiping(The Architectural Design & Research Institute of Tongji University(Group) Co., Ltd., Shanghai 200092, China)Abstract: Based on the overlong steel roof of Dongying Meeting and Exhibition Center, the feature of temperature effect of diagonal-crossing beam roof structure was studied. The influence of plane structure on temperature effect was described in detail. The formula of the plane stiffness of orthogonal and diagonal grid was given. The conclusion that the plane stiffness of diagonal-crossing beam roof structure is smaller was found through theoretical compassion and calculation, so the feature of diagonal-crossing grid structure was good for reducing the temperature effect. The rectangular orthogonal and diagonal-crossing beam roof FEM models were established and the temperature effect of the structures with the season temperature change load was analyzed. The results indicate that diagonal-crossing beam roof structure is affected by the plane stiffness, and the temperature effect is more evident on the side of bigger stiffness, and the theoretical analysis results are proved. Several factors that influence the feature of temperature effect of diagonal-crossing beam roof structure are discussed. According to the engineering project, the design ideas of the engineering were put forward.Keywords: diagonal-crossing beam structure; super-long structure; temperature effect; finite element analysis; whole bending effect作者簡介：鄭毅敏，碩士，教授級高級工程師，Email：22zym@tjadri.com。參考文獻［1］GB 50017—2003 鋼結(jié)構(gòu)設計規(guī)范［S］.北京：中國計劃出版社，2003.［2］王鐵夢.工程結(jié)構(gòu)裂縫控制［M］.北京：中國建筑工業(yè)出版社，1997.［3］崔帥，蘇旭霖.彎曲超長混凝土框架結(jié)構(gòu)的溫度應力研究［J］.結(jié)構(gòu)工程師，2006，22(5)：20-24.［4］盧宇航.環(huán)形超長混凝土結(jié)構(gòu)溫度應力及控制研究［D］.上海：同濟大學，2008.［5］鄭曉芬，程雄濤，鄭毅敏.環(huán)形超長混凝土結(jié)構(gòu)溫度問題研究［J］.結(jié)構(gòu)工程師，2006，22(6)：20-23.［6］吳京.超長混凝土框架中溫度應力的研究［J］.工業(yè)建筑，2006，36(5)：20-22.［7］馮健，呂志濤，吳志彬，等.超長混凝土結(jié)構(gòu)的研究與應用［J］.建筑結(jié)構(gòu)學報，2001， 22(6)：14-19.［8］張欣，劉爾烈.超靜定剛架計算中軸向變形的影響［J］.天津大學學報，1997，30（5）：636-641.［9］《鋼結(jié)構(gòu)設計手冊》編輯委員會.鋼結(jié)構(gòu)設計手冊［M］.3版.北京：中國建筑工業(yè)出版社，2004.［10］鄭毅敏，朱偉平，阮永輝，等.超長斜交網(wǎng)格鋼屋蓋溫度效應分析［J］.結(jié)構(gòu)工程師，2010，26(5)：32-36.
