（1 北京市建筑工程研究院有限责任公司, 北京 100039； 2 中国建筑西南设计研究院有限公司, 成都 610042）

［摘要］徐州市奥体中心体育场工程屋盖采用了新型杂交空间结构——环向悬臂索承网格结构，结构构造为开口形式，与弦支穹顶相似，径向钢梁变为悬臂构件，与周围结构通过销轴连接，这释放了悬臂构件端部弯矩，使钢拉索构件成为主要的受力构件，减小了悬挑梁的截面从而大大地减少用钢量。对本工程与预应力优化设计相关的关键技术进行了研究，包括钢拉索失效分析、预应力索夹节点的深化设计和抗滑移试验，并采用正搭法和倒拆法对预应力施工进行仿真分析等。结果表明，环向悬臂索承网格结构适用于超大型的体育场及其他公共建筑。

［关键词］环向悬臂; 索承网格结构; 索夹节点; 深化设计; 抗滑移试验; 预应力施工; 仿真分析

中图分类号：TU398+.9      文献标识码：A      文章编号：1002-848X(2014)15-0036-05

Research and application of critical technology for the prestressed design of ring cantilever cable supported latticed structures

Si Bo1, Wang Feng1, Xiang Xin’an2, Bao Min1, Wang Zeqiang1

 (1 Beijing Building Construction Research Institute Co., Ltd., Beijing 100039, China; 2 China Southwest Architectural Design and Research Institute Corp., Ltd., Chengdu 610042, China)

Abstract: The new hybrid spatial structure of ring cantilever cable supported latticed structures is adopted in the roof of Xuzhou Olympic Sports Center Stadium project. The structural form is similar to suspendome and is constructed as a form of opening. The radial steel beams become cantilever members, which are connected with the surrounding structures by pin shafts to release out the moment produced at the end components of cantilever members. Steel cable components have become the main bearing members. The sections of cantilever beams can be reduced and the amount of steel is greatly reduced. The critical technologies of the project about prestressed optimization design were studied, including the failure analysis of steel cable, deep design and anti-slip test of cable clamp joints. Assembled method and the backward method were adopted to carry out simulation analysis of prestressed construction. Results show that the ring cantilever cable supported latticed structures is suitable for super large stadiums and other public buildings.

Keywords: ring cantilever; cable supported latticed structure; cable clamp joint; deep design; anti-slip test; prestressed construction; simulation analysis

作者简介：司波，硕士，高级工程师，一级注册建造师，Email:sibo_2003@163.com。

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