Damping device for bridge suspender damping cable

Abstract

The invention discloses a damping device for a bridge suspender damping cable, which comprises a main beam, a bridge tower, a main cable and damping cable devices, the main cable is located above the main beam, the left end and the right end of the main cable are installed on the bridge tower on the two sides of the main beam, a plurality of suspender sets are arranged between the main cable and the main beam, and each suspender set comprises two suspenders which are parallel to each other and vertically arranged. The damping cable devices are symmetrically installed along the suspension bridge cross-section breaking surface and connected between the upper portion of a suspension bridge tower and a suspender, and the damping cable devices comprise a transverse damping cable device and a longitudinal damping cable device. Every two transverse main and auxiliary cables and two longitudinal main and auxiliary cables form a standard vibration reduction section, vibration of the four adjacent suspenders in any direction is restrained at the same time, and vibration of the suspenders of the full bridge is restrained by sequentially connecting the vibration reduction sections.

Description

technical field [0001] The invention discloses a damping cable damping device for a bridge suspender. Background technique [0002] Suspension bridges are widely used when crossing large rivers. The suspenders transmit the self-weight of the main girder of the suspension bridge and the traffic load of the bridge deck to the main cable. The suspenders of the long-span suspension bridge are slender and have low damping, which is prone to wind-induced vibration. When the frequency of vortex shedding is consistent with the natural frequency of the boom, the boom will vibrate strongly, which will easily lead to fatigue damage of the boom. [0003] The existing suspension rod vibration reduction device mainly adopts tuning vibration reduction. The principle of tuning vibration reduction is to connect a mass block on the suspension rod through a spring and a damper. Tuned mass dampers (TMDs), such as figure 1 shown. figure 1 Among them, m is the mass of the mass block, k is the...

AI Technical Summary

Problems solved by technology

[0006] Although the existing hydraulic fluid dampers have good energy dissipation and vibration reduction capabilities, and can perform energy dissipation and vibration reduction for any vibration mode of the boom, at present, the damper must be installed on the boom by adding additional supports. Near the anchorage end, when the boom vibrates, the stroke of the damper is small, so the energy consumption is also small, and the purpose of suppressing the vibration of the boom cannot be achieved

[0007] Based on the above reasons, the wind-induced vibration of the suspenders of the existing long-span suspension bridges, especially the wind-induced vibration of the long suspenders near the bridge tower has not been effectively controlled, which seriously affects the service life of the suspenders

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