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首页> 外文会议>Innovative infrastructures - toward human urbanism : Report >Tension Force Estimation of Cables in Cable Supported Bridges with Considering Initial Curvature Shortening Effect
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Tension Force Estimation of Cables in Cable Supported Bridges with Considering Initial Curvature Shortening Effect

机译：考虑初始曲率缩短效应的斜拉桥索力估算

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In the maintenance of cable-supported bridges, estimating cable tension is the most importantrnprocedure. For this procedure, some formulas have been used. However, the results estimated usingrnthese formulas are not accurate because they was developed using a variety of assumptions. Thernmajor reason for the inaccuracy of existing formulas is the neglect of the initial curvature shorteningrneffect. As the slenderness ratio of the cable increases, this effect is strengthened. If the cable isrnsupported by the immovable ends, the stretching force induced by the initial curvature shorteningrneffect results in a tension force to the cable. In this paper, a new method is proposed to increasernaccuracy in estimating the total tension force of the cable. The total tension force is calculated withrnconsidering the initial deflection curve, the initial curvature shortening effect, and the nonlinearrnoscillation of the cable. The verification result for a cable-stayed bridge showed that the initialrncurvature shortening effect should be considered to estimate the total tension force of the cable andrnthat the new method gives more rational estimates compared with the existing formulas.
机译：在电缆支撑桥的维护中，估算电缆张力是最重要的过程。对于此过程，使用了一些公式。但是，使用这些公式估算的结果不准确，因为它们是使用各种假设得出的。现有公式不正确的主要原因是忽略了初始曲率缩短效应。随着电缆的细长比增加，这种效果会增强。如果电缆由不可移动的末端支撑，则由初始曲率缩短效应引起的拉伸力会导致对电缆产生拉力。在本文中，提出了一种新的方法来提高估计电缆总张力的准确性。考虑到初始挠度曲线，初始曲率缩短效应和电缆的非线性振荡，计算总拉力。斜拉桥的验证结果表明，应考虑初始曲率缩短效应来估计缆索的总拉力，并且与现有公式相比，该新方法可以给出更合理的估计。

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