| 五河口斜拉桥索塔环向预应力筋张拉试验研究 |
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| 引用本文： | 刘世同.五河口斜拉桥索塔环向预应力筋张拉试验研究[J].公路,2006(5):7-10. |
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| 作者姓名： | 刘世同 |
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| 作者单位： | 江苏省高速公路建设指挥部,南京市,210004 |
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| 摘 要： | 宿淮高速公路五河口斜拉桥工程,进行了索塔足尺模型试验。针对环向预应力筋张拉伸长值比理论伸长值偏大这一现象,对环向预应力筋的张拉控制进行了研究,测试了6束预应力筋的摩阻系数。同时,还对初始张拉控制应力进行了试验分析,提出了相应的张拉控制程序。最后,对索塔锚固区共290束环向预应力筋实测张拉伸长值结果进行了概率统计分析,证实了理论伸长值修正算法中各项修正的必要性。
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| 关 键 词： | 斜拉桥 环向预应力筋 伸长值 摩阻系数 |
| 文章编号： | 0451-0712（2006）05-0007-04 |
| 收稿时间： | 2006-03-10 |
| 修稿时间： | 2006-03-10 |
Test and Study on Tension Control of Ring Tendons in Wuhekou Cable-stayed Bridge Tower |
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| LIU Shi-tong.Test and Study on Tension Control of Ring Tendons in Wuhekou Cable-stayed Bridge Tower[J].Highway,2006(5):7-10. |
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| Authors: | LIU Shi-tong |
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| Institution: | Headquarter of Expressway Construction of Jiangsu Province, Nanjing 210004, China |
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| Abstract: | Aimed at the phenomenon of the deviation of measured elongation and calculated one,the test and study on tension control of ring tendons with small curvature are carried out in this paper combined with Wuhekou Cable-stayed Bridge.The friction coefficients of six tendons are tested.At the same time,the test of the initial stress for tension control is analyzed and the corresponding procedure for tension control is presented.Finally,the statistic analysis of 290 measured elongations is constructed,which confirms the necessity of several modified items in the calculation method of elongation for small curvature tendons. |
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| Keywords: | cable-stayed bridge ring tendons elongation friction coefficient |
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