Bridge pier anti-collision component based on FRP and polyurethane foam filled honeycomb-shaped rubber concrete

Abstract

The invention discloses a bridge pier anti-collision component based on FRP and polyurethane foam filled honeycomb rubber concrete, wherein the bridge pier anti-collision component is arranged on theouter side of a bridge pier lower structure, and the bridge pier lower structure is a bridge pier and road surface connecting structure; the pier anti-collision component comprises an FRP sleeve, a polyurethane foam layer and a rubber concrete layer. The anti-collision component and a bridge pier adopt an integral forming construction technology; the whole anti-collision structure adopts a honeycomb buffer layer and a concrete filling layer, wherein the honeycomb buffer layer is composed of an FRP sleeve, a polyurethane foam layer and a rubber concrete layer. When the component is impacted, animpact buffer area, an impact force deformation area and an impact force constraint area are formed, so that the impact energy is dispersed in the circumferential direction of a honeycomb buffer layer composed of an FRP sleeve-polyurethane foam layer and a rubber concrete layer, and dual protection is conducted on a vehicle and a bridge lower structure. The component is integrally formed, the cost is low, the structure is simple, and later maintenance is facilitated.

Description

technical field [0001] The invention relates to a pier anti-collision structure for highway bridges, belonging to the technical fields of bridge anti-collision technology, bridge engineering and composite materials, in particular to a pier anti-collision component based on FRP and polyurethane foam filled honeycomb rubber concrete. Background technique [0002] With the development of my country's economy and society, my country's bridge construction has entered a stage of rapid development. The existing concrete piers of highway bridges have poor impact resistance and energy dissipation performance. The added anti-collision devices mainly use some energy-reducing structures to prolong the impact time and change the impact area. Reduce the impact force; From the perspective of technical implementation, the energy-reducing structure adopted is mainly high-performance closed-cell energy-absorbing material to absorb the impact force. This structure is often more suitable for the ...

AI Technical Summary

Problems solved by technology

[0007] To sum up, the existing bridge pier anti-collision mostly adopts secondary enclosure for the bridge pier. This technical design often increases the construction cost and increases the protection area of ​​the bridge pier (may occupy the lane or waterway); this enclosure structure The filling is generally a semi-rigid material, and as a structure that absorbs the impact force as a whole, it effectively protects the pier, but it often bears a large reaction force on the impacting object itself (such as a car, truck or vehicle); considering The pier itself has a certain anti-collision ability, so it is necessary to design an anti-collision structure to provide double protection for the pier and the impact object itself

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