A combined multi-stage anti-seismic bridge anti-collision and falling beam device based on brb technology

Abstract

The invention relates to a combined multi-stage anti-seismic bridge anti-collision and girder drop device based on BRB technology, which includes a beam body and an abutment, and also includes a buckling restraint support structure, a limit sliding connection assembly and a movable hinge, and the buckling restraint support structure The two ends are respectively connected to the limit sliding connection assembly and the movable hinge; the limit sliding connection assembly is fixed at the lower end of the beam body; the buckling restraint support structure is composed of a connection part, a support inner core, an outsourcing steel pipe, and an unbonded material, and the support inner core The gap between the steel pipe and the outer steel pipe is filled with mortar or concrete, and the cable passes through the mortar or concrete between the outer steel pipe of the buckling restrained support structure and the inner core of the support, and is respectively anchored at the anchorage and Anchor plate. The invention can realize the functions of free deformation in small displacement, energy consumption in medium displacement, and limit in large displacement. The structure of the device is simple and reliable, and can effectively control beam drop or collision of the bridge during an earthquake to 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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