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常州体育馆索承单层网壳屋盖低摩阻可滑动铸钢索夹试验研究
王永泉1, 冯 远2, 郭正兴3, 王立维2, 罗 斌3, 夏 循2
摘 要

(1 河海大学水利水电学院,南京 210098; 2 中国建筑西南设计研究院有限公司,成都 610081;
3 东南大学土木工程学院,南京 210096)

[摘要]   以常州体育会展中心体育馆钢屋盖为工程背景,研究了采用环索张拉方法时,大跨度椭球形索承单层网壳铸钢索夹节点处的预应力损失及其承载能力。选取该结构中最外环环索转角最大处的铸钢索夹,对其同步进行了摩擦损失和承载能力研究的足尺模型试验。试验结果表明,采用四氟乙烯板加不锈钢垫层的措施可有效降低铸钢索夹节点处的摩擦损失,能够保证主动张拉环索索段和被动张拉环索索段之间索力的有效传递;在整个预应力施加过程中,铸钢索夹均处于弹性工作状态。因此,对大跨度椭球形索承单层网壳结构,采用科学张拉方法及低摩阻可滑动铸钢索夹可实现结构预应力的有效建立。
[关键词]   常州体育馆;   索承单层网壳;   可滑动索夹;   低摩阻;   摩擦损失;   承载能力

Experimental research on low friction slippery cable clips in the cable-supported
 dome of Changzhou Gymnasium
Wang Yongquan1, Feng Yuan2, Guo Zhengxing3, Wang Liwei2, Luo Bin3, Xia Xun2
(1 College of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, China;
2 China Southwest Architectural Design and Research Institute Co., Ltd., Chengdu 610081, China;
3 College of Civil Engineering, Southeast University, Nanjing 210096, China)
Abstract:Taking the steel roof of the gymnasium of Changzhou Sports and Exhibition Center as the engineering background, the loss of prestress and carrying capacity of the cast-steel cable clips were researched when tensioning loop cables were applied on a long-span ellipsoidal cable supported dome. The cast-steel cable clip at the maximum curvature point of the outermost loop cable was selected, and a full-scale model test of the friction loss and carrying capacity was carried out simultaneously. The results indicate that using teflon plate and stainless steel cushion in the cast-steel cable clip can effectively reduce friction loss, which guarantees cable forces of active and passive cable segment, and the cast-steel cable clip is in elastic state under tensioning. The conclusion is that with reasonable design of low friction, slippery cable clips, tensioning loop cables can effectively establish the prestess in a long-span ellipsoidal cable supported dome.
Keywords:Changzhou Gymnasium; cable-supported dome; slippery cable clips; low friction; friction loss; carrying capacity
作者简介:王永泉,博士,讲师,一级注册结构工程师,Email:wyqseu@126.com

参考文献
[1]   冯远, 夏循, 王立维,等.常州体育馆会展中心结构设计[J].建筑结构,2010,40(9):35-40.
[2]   王永泉,郭正兴,罗斌,等.常州体育馆大跨度椭球形弦支穹顶预应力拉索施工[J].施工技术,2008,37(3):33-36.
[3]   张志宏,董石麟.张拉结构中连续索滑移问题的研究[J].空间结构,2001,7(3):26-32.
[4]   崔晓强,郭彦林,叶可明.滑动环索连接节点在弦支穹顶结构中的应用[J].同济大学学报:自然科学版,2004,32(10):1300-1303.
[5]   张国发,董石麟,卓新,等.弦支穹顶结构施工滑移索研究[J].浙江大学学报:工学版,2008,42(6):1051-1057.
[6]   王永泉,郭正兴,罗斌.大跨度椭球形索承单层网壳环索张拉仿真分析[J].施工技术,2007,36(6):58-60.
[7]   周明华.土木工程结构试验与检测[M].南京:东南大学出版社,2002.

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