Double-headed arrow type pier protection device

Abstract

The invention relates to a double-headed arrow type pier protection device. The double-headed arrow type pier protection device comprises at least one anti-collision structure and connecting structures used for connecting the adjacent anti-collision structures or connecting the anti-collision structures with a pier. Each anti-collision structure comprises an outer-layer head-on collision panel, amiddle energy absorption supporting structure and an inner-layer supporting plate. Each middle energy absorption supporting structure is of a negative Poisson's ratio structure formed according to thesize of the pier in an array manner. Each energy absorption unit is of a double-headed arrow structure, the energy absorption unit located on the outermost layer of each anti-collision structure is connected with the corresponding outer-layer head-on collision panel, and the energy absorption unit located on the innermost layer of each anti-collision structure is connected with the correspondinginner-layer supporting plate. Panels for sealing are mounted on the top faces and the bottom faces of the anti-collision structures, and a sealing box body is formed by the whole anti-collision structures. According to the double-headed arrow type pier protection device, the anti-collision structures have the negative Poisson's ratio characteristic; energy dissipation time and the deformation degree of energy absorption materials are effectively increased; the protection device of an anti-collision device on the pier is greatly improved, and structural stability is enhanced; and the energy absorption unit structures are arranged periodically, the structure is simple, and the production process is simple.

Description

technical field [0001] The invention relates to the technical field of building anti-collision, in particular to a double-arrow type pier protection device. Background technique [0002] Accidents of damaged bridges caused by the impact of bridge piers happen frequently, and the economic losses are huge. Therefore, the research on the anti-collision device of the bridge pier is very important. Existing pier anti-collision devices are of a great variety, with various structures and material forms. After years of research and application, artificial islands made of sand and stones, flexible anti-collision blocks that use rubber and other materials to dissipate energy, and floating or fixed anti-collision boxes have been developed. The principle is based on outbuilding barrier, energy absorption, momentum buffering. [0003] Among them, the crash box structure has many advantages such as moderate cost, high protection, and convenient manufacture and installation. It is the ...

AI Technical Summary

Problems solved by technology

But the section of the energy-absorbing unit inside the existing anti-collision box generally adopts a positive Poisson's ratio structure such as a regular quadrilateral, a regular hexagon, a regular octagon or a circle. , the structure of the anti-collision box will expand perpendicular to the direction of the force, and a large stress concentration phenomenon will appear at the impact position. As the ship continues to intrude forward, the box structure will rapidly tear and fail, resulting in Crash structure rapidly fails

As a result, the effective energy dissipation time of the structure during the impact is much shorter than expected, and the protective effect on bridge piers and other buildings is limited, and it cannot meet the increasingly stringent anti-collision protection requirements

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