Tower-anchor combined suspension bridge

Abstract

The invention discloses a tower-anchor combined suspension bridge. The tower-anchor combined suspension bridge is mainly composed of a main cable, suspension cables, cable towers, horizontal rods and a main beam. The main cable is wound around the tower tops, the horizontal rods and the tower bottoms in sequence and finally anchored between the cable towers on the two sides of the suspension bridge. The cable tower form of the tower-anchor combined suspension bridge is greatly different from that of a traditional suspension bridge, the eccentric lines of the cable towers are curves, and back cables can be prevented from generating bending moment on the towers when rotating around the towers; the width lines of the cable towers are curves, and it can be guaranteed that materials are fully utilized. On the premise of keeping the span of a traditional ground anchor suspension bridge, large-size anchors can be omitted, tower foundations and anchors are combined, the calculated length of the main cable connected with the anchors is reduced, the stress and amplitude of the main cable are reduced under the dead load action, the horizontal tension of the main cable can be balanced by the counter force of the foundations and the axial force of the main beam together, and the foundations are stressed obliquely downwards. The tower-anchor combined suspension bridge is more reasonable in stress, and strength and beauty unification can be achieved more easily under the premise of guaranteeing structure safety, economy and durability.

Description

technical field [0001] The invention belongs to a suspension bridge, in particular to a tower-anchor integrated suspension bridge. Background technique [0002] The suspension bridge structure has the characteristics of good mechanical performance, large spanning capacity, light and beautiful appearance, strong earthquake resistance, various structural forms, and good adaptability to terrain. It is often used as a Preferred bridge type. Therefore, people have also designed various suspension bridge structures. For example, Chinese patent application No. 201510012845.7 discloses a suspension bridge with high torsional rigidity, including a main girder, a cable tower, a main cable and a suspender. Both sides are used to suspend the main girder through the main cable, so that the main cable, suspender and main girder form a structure with a triangular cross-section in space; it uses the stability of the triangle to form a structure similar to a triangular box girder, which fu...

AI Technical Summary

Problems solved by technology

[0003] However, in general conventional ground-anchored suspension bridges, it is necessary to build bulky anchors to anchor the main cable, which results in a very large amount of foundation work for the anchorage structure in places with poor geological conditions, which often becomes a difficult point in the project; The anchorage and anchorage foundation of the anchor suspension bridge occupy a considerable part of the project cost, and become an important aspect affecting the structural economy of the suspension bridge; in urban areas or tourist areas, the construction of bulky anchorages will also have a negative impact on the aesthetics of the environment

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