Pier anti-collision device with flexible sandwich structure

Abstract

The invention discloses a pier anti-collision device with flexible sandwich structure. The device comprises a steel plate inner anti-collision layer, a buffering energy-absorbing sandwich layer, an outer-layer collision facing panel and I-shaped connecting pieces between all components of the anti-collision device, and the sandwich layer is composed of a concave hexagonal negative poisson ratio honeycomb framework and an inner foam concrete filler. All the components of the device are bonded through epoxy resin adhesives and connected into a whole through I-shaped toggle clips. In order to improve the durability and ductility of the anti-collision device, a layer of polyurea material is sprayed on the outer surface of the head-on collision panel. Compared with a traditional bridge pier anti-collision device, the bridge pier anti-collision device is small in occupied area, convenient and fast to install and replace and small in adverse effect on traffic, the sandwich layer of the bridgepier anti-collision device is high in energy absorption efficiency, and stress diffusion can be effectively achieved. Because the anti-collision device can effectively absorb energy generated by collision and reduce the peak value of collision force, damage to a vehicle and a pier due to collision can be reduced at the same time.

Description

technical field [0001] The invention relates to the technical field of pier impact protection, in particular to a negative Poisson's ratio honeycomb core pier anti-collision sandwich sacrificial structure filled with foam concrete. Background technique [0002] With the rapid development of cities and the rapid increase of urban population, in order to alleviate urban traffic pressure and provide convenience for citizens to travel, the number of viaducts and overpasses in cities has also increased. These infrastructures have greatly improved urban traffic. The transportation capacity and the quality of life of residents, but the traffic accidents of vehicles hitting bridge piers are also increasing. Accidents of vehicle-bridge collisions not only cause loss of public property and traffic congestion, but also pose a great threat to people's life safety. [0003] At present, protective measures such as outsourcing cement isolation piers and outsourcing steel boxes are general...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a negative mooring system filled with foam concrete in view of the above-mentioned problems such as the serious damage caused by the excessive rigidity of the anti-collision structure and the large volume of the anti-collision device and the inconvenient replacement of the anti-collision device. Somby honeycomb core sandwich structure anti-collision device

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