斜交梁系钢屋盖结构温度效应研究
- 摘 要
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郑毅敏,朱伟平(同济大学建筑设计研究院(集团)有限公司, 上海 200092)[摘要]以东营会展中心超长钢屋盖为背景,研究斜交梁体系屋盖结构的温度效应特点。阐述了楼屋盖结构平面内刚度对温度效应的影响;推导了正、斜交网格平面内刚度的计算公式,通过分析比较,得到斜交网格平面内刚度较小的结论,有利于减小结构的温度效应。利用ANSYS软件建立正、斜交梁体系超长屋盖结构模型,并进行季节温差作用下的分析,结果表明斜交梁体系温度效应受屋盖平面内刚度影响大,刚度较大侧的温度效应显著,同时亦验证了理论分析的结论。讨论了若干因素对斜交梁体系屋盖结构温度效应特点的影响作用。并结合工程实际,提出若干设计要点。[关键词]斜交梁体系;超长结构;温度效应;有限元分析;整体弯曲效应中图分类号:TU391文献标识码:A文章编号: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作者简介:郑毅敏,硕士,教授级高级工程师,Email:22zym@tjadri.com。参考文献[1]GB 50017—2003 钢结构设计规范[S].北京:中国计划出版社,2003.[2]王铁梦.工程结构裂缝控制[M].北京:中国建筑工业出版社,1997.[3]崔帅,苏旭霖.弯曲超长混凝土框架结构的温度应力研究[J].结构工程师,2006,22(5):20-24.[4]卢宇航.环形超长混凝土结构温度应力及控制研究[D].上海:同济大学,2008.[5]郑晓芬,程雄涛,郑毅敏.环形超长混凝土结构温度问题研究[J].结构工程师,2006,22(6):20-23.[6]吴京.超长混凝土框架中温度应力的研究[J].工业建筑,2006,36(5):20-22.[7]冯健,吕志涛,吴志彬,等.超长混凝土结构的研究与应用[J].建筑结构学报,2001, 22(6):14-19.[8]张欣,刘尔烈.超静定刚架计算中轴向变形的影响[J].天津大学学报,1997,30(5):636-641.[9]《钢结构设计手册》编辑委员会.钢结构设计手册[M].3版.北京:中国建筑工业出版社,2004.[10]郑毅敏,朱伟平,阮永辉,等.超长斜交网格钢屋盖温度效应分析[J].结构工程师,2010,26(5):32-36.