Large-span concrete-filled steel tubes arch bridge vibration inhibiting system based on anti-seismic property

Abstract

The invention discloses a large-span concrete-filled steel tubes arch bridge vibration inhibiting system based on the anti-seismic property. The large-span concrete-filled steel tubes arch bridge vibration inhibiting system comprises a main arch, a bridge floor beam, multiple slings arranged between the main arch and the bridge floor beam, at least one anti-seismic rope, multiple longitudinal limiting damping devices and two transverse limiting damping devices, wherein all the slings are transversely connected through the anti-seismic ropes into an overall structure, the longitudinal limiting damping devices are connected between the bridge floor beam and correspondingly installed piers, and the two transverse limiting damping devices are arranged at the cross positions of the two ends of the main arch and the bridge floor beam. According to the large-span concrete-filled steel tubes arch bridge vibration inhibiting system based on the anti-seismic property, by means of the vibration inhibiting technology of building the main arch and the slings and the vibration inhibiting technology of the main arch and the bridge floor beam, the problem that under the action of seismic loads, the slings are large in vibration amplitude, the longitudinal, transverse and vertical vibration amplitude of the bridge floor beam is large to cause mesomerism can be effectively solved, anti-seismic safety property of a bridge is ensured, reliability is high, the service life of the vibration inhibiting system approximates to that of a major structure, maintenance and replacement in the using process are avoided, and the engineering cost is low.

Description

technical field [0001] The invention relates to the field of bridge design, in particular to a vibration suppression system of a long-span concrete-filled steel tube arch bridge based on anti-seismic performance. Background technique [0002] Existing bridges have larger and larger spans. For extra-long-span arch bridges, a number of suspension cables are connected between the main arch and the bridge deck girder. Large, under the action of earthquake load, when the main arch and the deck girder produce longitudinal and lateral displacements, due to the large difference in the length of the slings, the vibration amplitude of each sling is inconsistent and cannot be coordinated, which will easily cause all slings to If the vibration amplitude is too large, it will damage or accelerate the vibration of the bridge deck girder; in addition, under the action of earthquake in all directions, the bridge deck girder will generate large vibration force and vibration amplitude in the ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the existing long-span arch bridge in the prior art. Under the action of earthquake load, in order to ensure the anti-seismic safety performance of the bridge, it is necessary to limit the longitudinal, lateral and vertical vibration amplitude of the bridge deck beam, and the sling To solve the above-mentioned problems of vibration amplitude, provide a vibration suppression system for long-span concrete-filled steel tube arch bridges based on anti-seismic performance

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