Girder string continuous cable stayed bridge

Abstract

The invention relates to a girder string continuous cable stayed bridge which belongs to the field of bridge construction. The girder string continuous cable stayed bridge comprises a bridge deck, a plurality of bridge towers, two girders horizontally arranged at both sides of the bridge deck, a plurality of stay cables connecting the bridge towers to the girders and a plurality of web members connected under the girders and arranged along the span direction of the girders, wherein each stay cable is a continuous cable formed by an upper string cable and a lower string cable; and the girders, the web members and the lower string cables form a girder string. In the invention, the web members are used for supporting the girders in a plurality of points, and the mechanical behavior of the web members can be improved. The girder string continuous cable stayed bridge is a novel structure system combining a cable stayed bridge and the girder string, is a breakthrough and development of the traditional cable stayed bridge, and has the advantages of reasonable structure, uniform stress, light self-weight, high strength, high spanning capability, good wind resistance, fatigue resistance, corrosion resistance, and the like.

Description

technical field [0001] The invention belongs to the field of bridge engineering, in particular to a cable-stayed bridge structure. Background technique [0002] Cable-stayed bridge, also known as cable-stayed bridge, is a bridge structure in which the bridge deck is directly pulled on the bridge tower by many cables, such as figure 1 As shown, it mainly includes a plurality of compressed bridge towers 11 erected at intervals on both sides of the bridge deck, two bent main girders 12 horizontally arranged on both sides of the bridge deck, and a bridge connecting the bridge towers 11 and the main girders 12. Multiple tensioned stay cables 13, figure 1 Only the pylons, girders, and stay cables on one side of the deck are shown in . The stay cables 13 can be regarded as multi-span continuous elastic supports of the main girder 12 . Cable-stayed bridges occupy an important position in modern bridge structures because of their good structural performance, spanning capacity and ...

AI Technical Summary

Problems solved by technology

At present, several connection forms commonly used for cable-beam anchorage have stress concentration; and the structure is complex, and water is easy to accumulate in the connection parts between components and components such as anchor pipes, which will cause corrosion of components and affect their service life.

Moreover, the cable stays of long-span cable-stayed bridges have high flexibility and low damping, and are prone to vortex-induced resonance, galloping vibration, and wind and rain-induced vibration, which cause alternating changes in cable stress and fatigue of anchor heads.

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