(中国建筑西南设计研究院有限公司，成都 610081)

［摘要］   介绍了镇江体育会展馆屋盖结构体系的方案比选，屋面体系的布置，节点连接形式及支座形式的选择；建立了屋盖结构、围护钢桁架结构和下部钢筋混凝土框架结构的分离模型和整体模型，并对两种模型中各结构在竖向作用和水平作用下的内力与变形特性进行了分析比较，结果表明在竖向作用下两种模型受力特性相差不大，在水平作用下则存在差别。根据预应力设计原则，确定了拉索截面和张拉控制力；同时介绍了屋盖结构中关键节点的设计。
［关键词］   镇江体育会展馆；   屋盖结构；   张弦桁架；   预应力；   节点设计

Structure design on roof of the exhibition gymnasium of Zhenjiang Sports and Exhibition Center
Chen Tianyi, Lei Yun, Chen Wenming, Feng Yuan, Fu Kanlin, Liao Xiaoxiong
(China Southwest Architectural Design and Research Institute Co., Ltd., Chengdu 610081, China)
Abstract:The structural system，roof system and support style of roof of the exhibition gymnasium of Zhenjiang were introduced. Separated model and integrated model of the roof structure，the enclosure structure and the reinforced concrete frame structure were developed. The internal force and deformation of each structure under horizontal and vertical load in two kinds of models were compared. The results indicate that the internal force and deformation in two kinds of models are similar under vertical actions，while different under horizontal actions. According to the principles of prestressing, the sections and tension control stress of prestressed cables were determined. Design of key joints in the roof structure was also introduced.
Keywords:exhibition gymnasium of Zhenjiang; roof structure; truss string structure; prestress; joint design
作者简介：陈天宜，高级工程师，一级注册结构工程师，Email：chentianyi001@126.com。

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