| 空间多曲线型预应力钢索的预应力摩擦损失研究 |
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| 引用本文： | 宋玉普,车轶,马德有,赵国藩.空间多曲线型预应力钢索的预应力摩擦损失研究[J].土木工程学报,2002,35(6):105-108. |
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| 作者姓名： | 宋玉普 车轶 马德有 赵国藩 |
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| 作者单位： | 大连理工大学 |
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| 摘 要： | 通过S型曲线预应力连续箱梁桥的现场原型试验 ,实测了多种线型的预应力钢索预应力摩擦损失值 ,确定了局部偏差影响系数k和预应力钢索与管道壁的摩擦系数 μ的取值 ,建议了空间多曲线型预应力钢索的预应力摩擦损失的计算模式。在正式张拉阶段 ,现场实测了部分空间多曲线型钢索的预应力摩擦损失 ,对施工过程中钢索的预应力是否达到设计要求进行监控。同时 ,实测结果验证了本文提出的空间多曲线型预应力钢索预应力摩擦损失的计算模式和计算参数取值的合理性
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| 关 键 词： | 原型试验 预应力钢绞线束 预应力摩擦损失 |
| 文章编号： | 1000-131X(2002)06-0105-04 |
| 修稿时间： | 2000年9月18日 |
STUDY ON LOSSES OF PRESTRESS DUE TO FRICHON FOR CURVED PRESTRESSING TENDON |
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| Song Yupu,Che Yi,Ma Deyou,Zhao Guofan.STUDY ON LOSSES OF PRESTRESS DUE TO FRICHON FOR CURVED PRESTRESSING TENDON[J].China Civil Engineering Journal,2002,35(6):105-108. |
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| Authors: | Song Yupu Che Yi Ma Deyou Zhao Guofan |
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| Affiliation: | Dalian University of Technology |
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| Abstract: | A prototype test in situ of the S-shape prestressed continuous box girder is carried out, and the losses of prestress due to friction for various prestressing tendons are got in situ. The effect of local tolerance of curved tube on the wobble coefficient is not specified in the current code, also the curvature coefficient.Based on test results, the two coefficients are determined. A calculating method for lossesof of prestress for the prestressing tendon in curved tube is proposed in the paper. The calculated results by the proposed method are in good agreement with that of the site measurements. |
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| Keywords: | prototype test prestressing tendon prestress losses due to friction |
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