Anti-collision device of multi-stage falling-proof beam

Abstract

The invention discloses an anti-collision device of a multi-stage falling-proof beam. The device consists of a sliding limiting system and a connecting system which are sealed inside a casing system, wherein the sleeve system is formed by welding a fixed end sealing plate, a sliding end sealing plate and a steel sleeve; the sliding limiting system is formed by serially connecting a sliding system I, a sliding system II and a limiting system; the sliding system I is formed by welding a first stage sliding block, an outer connecting rod and an inner connecting rod; the sliding system II is formed by welding a second stage sliding block, an inner sliding steel tube, a limiting block and an outer sliding steel tube in sequence; the limiting system is composed of a tension and compression spring and a steel strand; and the connecting system is composed of a fixed end connector, a connecting sleeve and a sliding end connector. The anti-collision device is installed at an expansion joint of a bridge so as to connect bridge components at the two ends of the expansion joint; the anti-collision device is simple to manufacture, convenient to install and clear in stress mechanism; and the phenomenon that a main beam is dissociated from an abutment because of an earthquake and the problem that adjacent connected main beams collide to each other are effectively prevented.

Description

Technical field: [0001] The invention relates to an anti-seismic construction measure for a bridge, in particular to a multi-stage anti-fall beam anti-collision device. Background technique: [0002] It can be seen from the previous earthquake damages that the most frequent damage forms of bridge structures are falling beam damage and collision damage. Falling beam damage refers to the separation of the upper structure of the bridge from the supporting lower structure, that is, the main girder is separated from the pier or abutment, causing the main girder to hang, break, or fall. Collision damage refers to the phenomenon that the upper structure of the bridge between adjacent links, that is, the gap between the main girders is completely compressed, and collides with each other, causing the ends of the main girders to crack. [0003] The reason for the falling beam failure is that the supporting length between the superstructure and the substructure of the bridge is too sm...

AI Technical Summary

Problems solved by technology

When the rigid components function, the force on the structure increases suddenly, which will cause local damage to the connection parts, and then cause the failure of the anti-drop beam device

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