A combined anti-collision and beam-dropping device for multi-stage aseismic bridges based on BRB technology is disclosed

Abstract

The invention relates to a combined anti-collision and beam dropping device of a multi-stage seismic bridge based on BRB technology, comprising a beam body and an abutment, further comprising a buckling restraint support structure, a limit sliding connection assembly and a movable hinge, wherein two ends of the buckling restraint support structure are respectively connected with the limit slidingconnection assembly and the movable hinge; A limit sliding connected assembly is fixed on that lower end of the beam body; a Buckling-restrained support structure consist of connecting part, A supportcore, an outer steel tube, and an unbonded material. mortar or concrete is filled between that support core and the outer steel tube, and cables pass through the mortar or concrete between the outersteel tube and the inner support core of the buckling restraint support structure, and are anchored on anchors and anchor pads respectively at the joints of the two ends of the buckling restraint support structure. The invention can realize the functions of small displacement free deformation, medium displacement energy dissipation and large displacement limit. The structure of the device is simple and reliable, which can effectively control the falling beam or collision of the bridge during the earthquake, and ensure the safety of the bridge.

Description

technical field [0001] The invention relates to a bridge anti-collision and beam drop device, in particular to a combined multi-stage anti-seismic bridge anti-collision and beam drop device based on BRB technology, which belongs to the technical field of bridge anti-seismic and bridge shock reduction and isolation. Background technique [0002] In the past 20 to 30 years, earthquakes and secondary disasters caused by earthquakes have been one of the major natural disasters that threaten the living environment of human beings, causing serious losses to human life and property. In some high-intensity areas, the bridge will undergo a large longitudinal displacement under the action of the earthquake. When the displacement exceeds the allowable value, the upper structure will collide or the beam will be damaged. [0003] At present, the method to solve the collision and falling beam is mainly by increasing the width of the supporting surface of the supporting connection part and...

AI Technical Summary

Problems solved by technology

Although the above method can solve the main girder collision and beam falling damage to a certain extent, the effect is not obvious, especially in the case of rare earthquakes, the beam body collision causes great structural damage, and there are still beam falling accidents

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