Novel reasonable anti-seismic system structure of suspension bridge in high-intensity earthquake area

Abstract

The invention discloses a novel reasonable anti-seismic system structure of a suspension bridge in a high-intensity seismic area. A protection system formed by corrugated steel web combined cross beams, viscous dampers between tower beams and energy-consuming central buckles between cable beams is adopted, and three pairs of central buckles are arranged in the middle of a main span of the suspension bridge so as to disperse the concentrated force of the central buckles acting on a main beam as much as possible; and longitudinal viscous dampers are arranged between the tower beams. The above measures are adopted to improve the anti-seismic property of the bridge tower, the rigidity of each component of the bridge is coordinated and matched, and the seismic energy is actively consumed, so that the purpose of improving the comprehensive anti-seismic property of the whole bridge is achieved, and the field of adopting the reinforced concrete bridge tower by the large-span suspension bridgein the seismic area of the high-intensity area is expanded.

Description

technical field [0001] The invention relates to the anti-seismic field of suspension bridges, in particular to a new reasonable anti-seismic system structure for large-span suspension bridges in high-intensity earthquake areas using reinforced concrete pylons. Background technique [0002] Suspension bridge is a kind of flexible structure with good seismic performance. When reinforced concrete bridge towers are used in high-intensity earthquake areas, although they are economical and durable, the seismic response is large, and their seismic resistance is difficult to meet the requirements, especially when the span is large and the bridge towers are high. , the application of reinforced concrete bridge towers is restricted. At present, the towers of kilometer-level suspension bridges in high-intensity earthquake areas in foreign countries often use lighter steel towers to meet the earthquake resistance requirements, but steel towers are expensive and difficult to use in mou...

AI Technical Summary

Problems solved by technology

[0002] Suspension bridge is a kind of flexible structure with good seismic performance. When reinforced concrete bridge towers are used in high-intensity earthquake areas, although they are economical and durable, the seismic response is large, and their seismic resistance is difficult to meet the requirements, especially when the span is large and the bridge towers are high. , the application of reinforced concrete bridge towers is restricted

At present, the kilometer-level suspension bridge towers in high-intensity earthquake areas in foreign countries often use lighter steel towers to meet the earthquake resistance requirements, but steel towers are expensive and difficult to use in mountainous areas with inconvenient transportation.

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