九江文化中心自由曲面钢屋盖结构设计
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韩重庆1，黄桂新2，陈浩曼2，张翀1（1 东南大学建筑设计研究院有限公司， 南京 210096； 2 东南大学土木工程学院， 南京 210096）［摘要］九江文化中心钢屋盖外形为造型轻盈的自由曲面，根据不同部位的受力特点，采用由双层螺栓球网壳、空间管桁架、树状支撑系统杂交而成的空间网格结构。重点介绍了钢屋盖的结构体系布置、静载分析、动力特性、整体稳定及多维多点地震响应分析。分析结果表明：关键部位的管桁架有效地增强了结构的整体刚度；树状支撑与大跨屋盖共同形成了高效的拱形受力机理；跨越多栋建筑的钢屋盖需进行多维多点地震响应分析；曲面的面外变形可显著地降低温度应力。［关键词］双层网壳； 管桁架； 树状支撑； 杂交结构； 多维多点地震响应分析中图分类号：TU242.4，TU318.2 文献标识码：A 文章编号：1002-848X(2013)05-0029-06Structural design on the free-form steel roof for Jiujiang Cultural CentreHan Chongqing1, Huang Guixin2, Chen Haoman2, Zhang Chong1(1 Architects & Engineers Co., Ltd. of Southeast University, Nanjing 210096, China; 2 College of Civil Engineering, Southeast University, Nanjing 210096, China)Abstract: The shape of steel roof for Jiujiang Cultural Centre is light free-form surface. According to the mechanical characteristics of different parts, the steel roof adopts spatial latticed structure which is consisted of double-layer reticulated shell, space tube truss and dendritic support system. Structural layout, static analysis, dynamic characteristic, overall stability and multi-dimensional and multi-support earthquake excitation analysis were mainly introduced. The results indicate that: the tube truss arrangement in key positions enhances the structural rigidity effectively; the dendritic support together with large-span roof is served as arched stress mechanism; the steel roof which spans multiple buildings needs multi-dimensional and multi-support earthquake excitation analysis; out-of-plane deformation of free-form structure reduces temperature stress significantly.Keywords: double-layer reticulated shell; tube truss; dendritic support; hybrid structure; multi-dimensional and multi-support earthquake excitation analysis作者简介：韩重庆,博士,高级工程师,Email:chq_han@seu.edu.cn。参考文献［1］GB 50011—2010建筑抗震设计规范［S］. 北京:中国建筑工业出版社,2010.［2］GB 50068—2001建筑结构可靠度设计统一标准［S］. 北京:中国建筑工业出版社, 2001.［3］JGJ 7—2010空间网格结构技术规程［S］. 北京:中国建筑工业出版社, 2010.［4］陈浩曼. 九江文化中心不规则空间网壳的抗震关键性能研究［D］.南京:东南大学,2012.
