Damping comb type expansion joint device

Abstract

The invention relates to a damping comb type expansion joint. A damping comb type expansion joint device comprises a damping waterproof soft mat layer, a comb plate, an anchor bolt, a pull rod assembly, an end supporting metal plate, a cement base and the like. In the process of vehicle load passing through a bridge expansion joint and the comb plate warping for vibration, the expansion joint caneffectively weaken non-symmetry vibration, weaken the upper pulling force of the anchor bolt, and buffer the impact compression of the rear portion of the comb plate to the cement base when the comb plate is warped, so that the cement base is prevented from detachment damage. The economic cost is saved and the service life of the expansion joint is prolonged through the design.

Description

technical field [0001] The invention belongs to the field of bridge expansion joints, and in particular relates to a structure of a novel vibration-reducing comb-toothed expansion joint, in particular to a structure capable of effectively controlling the impact of the comb-tooth plate on the anchor bolts and the rear side cement base during the upward vibration process. The vibration-absorbing structure that caused serious damage to the seat was proposed, and a simple and optimized structure was proposed for its asymmetrical vibration characteristics. Background technique [0002] In general, due to thermal expansion, the length of bridge decks changes continuously with changes in ambient temperature. Although the coefficient of thermal expansion of concrete and steel is only 10 -5 , but given the length of the bridge, the movement of its panel ends is also very noticeable. In order to prevent the internal force of the bridge from increasing due to temperature changes, it ...

AI Technical Summary

Problems solved by technology

However, such comb-tooth expansion joints are often damaged in actual engineering, and most of the damage is caused by anchor bolts

The comb-toothed expansion joint fails when the bolts are pulled out. At the same time, the cement base on the rear side is squeezed and peeled off, and the comb-toothed plate is upturned. This makes the passing vehicles often jump, which seriously affects the service life of the bridge.

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