一种大跨径斜拉桥支承体系

Supporting system of long span stayed-cable bridge

Abstract

The invention discloses a support system for a long-span cable-stayed bridge, which relates to the technical field of bridge engineering. The support system consists of nine parts including main girders, bridge towers, stay cables, transitional piers, transverse wind resisting bearings, longitudinal viscous dampers with limiting function, longitudinal sliding bearings with limited transverse rigidity, transverse dampers, and telescopic devices. Compared with the prior support system for the long-span cable-stayed bridge, the support system of the invention has the characteristics that the longitudinal viscous dampers with limiting function are arranged between the main girders and the bridge towers; and the longitudinal sliding bearings with limited transverse rigidity and the transverse dampers are arranged between the main girders and the transitional piers. The support system provides effective rigidity and damping for the long-span cable-stayed bridge to ensure that the static force and the dynamic force responses of the bridge are controlled in an acceptable scope; the structural stress is definite; and the applicability is strong.
本发明公开了一种大跨径斜拉桥支承体系,涉及桥梁工程技术领域,它由主梁、桥塔、斜拉索、过渡墩、横向抗风支座、纵向带限位功能的粘滞阻尼器、横向有限刚度的纵向滑动支座、横向阻尼器和伸缩装置等九部分组成。与已有的大跨径斜拉桥支承体系相比,本发明的不同特点是:主梁和桥塔之间设置纵向带限位功能的粘滞阻尼器,主梁与过渡墩之间设置横向有限刚度的纵向滑动支座和横向阻尼器。本发明为大跨径斜拉桥提供有效的刚度和阻尼,可保证桥梁的静力和动力响应控制在可接受的范围之内,且结构受力明确,适用性强。

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