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Adjustment for shape restoration and force control of cable arch stayed bridges

机译:调整斜拉桥的形状恢复和力控制

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摘要

Cable arch stayed bridges are one type of tensile structures, and there are increasingly such structures constructed. Their performance relies on how they are designed. This type of structures can suffer big deflections under load, in this situation the displacements may need to be reduced. Sometimes, it may be necessary to control internal force of a specific cable so the cable force remains within the desired limit. More study need to be done to develop the techniques that are available for such adjustments. This paper deals with theoretical and experimental adjusting of two physical models, and the linear and nonlinear geometrical behavior of cable (arch) stayed bridges. It was concluded that the techniques of adjustment were practical and efficient to reduce, eliminate shape distortion, and control internal bar force of both structures. For structures that behave linearly, it is easier to get the target (displacement or force), but for non-linear structures one iteration of adjustments was not enough to get the displacement target. Through the techniques of the internal bar force adjustment, the amount of force can be reduced even to the zero, e.g. in case of replacing damaged members.
机译:索拱斜拉桥是拉伸结构的一种类型,并且越来越多地构造了这种结构。它们的性能取决于它们的设计方式。这种类型的结构在载荷作用下可能会发生较大的变形,在这种情况下,可能需要减少位移。有时,可能有必要控制特定电缆的内力,以使电缆力保持在所需的极限之内。需要做更多的研究来开发可用于此类调整的技术。本文讨论了两种物理模型的理论和实验调整,以及斜拉桥的线性和非线性几何行为。结论是,调整技术是实用且有效的,以减少,消除形状变形和控制两个结构的内部拉力。对于线性行为的结构,更容易获得目标(位移或力),但对于非线性结构,仅进行一次迭代调整就不足以得出位移目标。通过内部杆力调节技术,力的大小甚至可以减少到零,例如,如果更换损坏的部件。

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