| 考虑反向摩阻的后张法PC构件锚固损失的计算 |
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| 引用本文： | 胡狄,陈政清.考虑反向摩阻的后张法PC构件锚固损失的计算[J].中国公路学报,2004,17(1):34-38. |
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| 作者姓名： | 胡狄 陈政清 |
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| 作者单位： | 中南大学,土木建筑学院,湖南,长沙,410075 |
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| 基金项目： | 铁道部科技研究开发计划项目(99G09) |
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| 摘 要： | 基于后张法PC构件预应力钢筋张拉时的经典摩阻理论,建立了预应力钢筋锚固时考虑反向摩阻力的力筋应力损失的统一计算公式,适于电算;给出了相应的近似计算公式,适于手算。分析表明:近似公式与理论公式的计算结果误差在5％以内,完全满足工程上的精度要求。计算结果与现行桥梁规范公式的计算值进行了比较。该方法概念清晰,计算方便,适用于公路与铁路桥梁中任意形状力筋的锚固损失计算。
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| 关 键 词： | 桥梁工程 锚固损失 经典摩阻理论 反向摩阻 预应力混凝土 |
| 文章编号： | 1001-7372(2004)01-0034-05 |
| 修稿时间： | 2003年2月22日 |
Computation of stress loss in prestressed steel due to anchorage set considering function of reverse-friction in PC members |
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| HU Di,CHEN Zheng-qing.Computation of stress loss in prestressed steel due to anchorage set considering function of reverse-friction in PC members[J].China Journal of Highway and Transport,2004,17(1):34-38. |
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| Authors: | HU Di CHEN Zheng-qing |
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| Abstract: | Based on classical theory of friction when tendons are tensioned in post-tensioned concrete members, the unified method to calculate the stress loss in tendons due to anchorage set while considering the affection of reverse friction has been established, these formulae are suitable to be used in computer; also approximate formulae are produced which are suitable to manual computation. The analytical results show that the errors between approximate formulae and strict formulae are less than 5%, and the comparison to the results of the formulae in current bridge codes has been finished. The unified method is clear in concept and is convenient for computing, and can be used in any profile type of tendon both in highway and railway bridges. |
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| Keywords: | bridge engineering stress loss by anchorage set classical theory of friction reverse friction prestressed concrete |
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