Fast assembly type anti-explosion protective plate for steel bridge main girders and method for manufacturing and assembling fast assembly type anti-explosion protective plate

Abstract

The invention discloses a fast assembly type anti-explosion protective plate for steel bridge main girders and a method for manufacturing and assembling the fast assembly type anti-explosion protective plate. The fast assembly type anti-explosion protective plate comprises a plurality of assembly type anti-explosion protective plate single bodies. The assembly type anti-explosion protective platesingle bodies are combined with one another to form the fast assembly type anti-explosion protective plate, a top steel plate and a bottom steel plate of each assembly type anti-explosion protective plate single body are integrally connected with each other by hinges and energy dissipation soft steel bars, spaces between the top steel plates and the bottom steel plates are filled with foamed aluminum layers, variable-section steel bars are adhered on the bottom steel plates, round steel ingots with holes are adhered on the top steel plates, basalt fiber cloth is adhered on the top steel plates, and SMA (stone mastic asphalt) flame-retardant asphalt concrete abrasion layers are paved on the surfaces of the fast assembly type anti-explosion protective plate after the fast assembly type anti-explosion protective plate is completely assembled. The fast assembly type anti-explosion protective plate and the method have the advantages that the excellent explosion shock wave energy absorptioncapacity of foamed aluminum, the support and energy dissipation capacity of the steel bars, the high-temperature resistance of the basalt fiber cloth and the disguise power and the abrasion resistanceof the SMA flame-retardant asphalt concrete abrasion layers are utilized, and accordingly the purpose of bearing upper load and protecting the steel bridge main girders can be achieved; the cost canbe saved, the quality of the fast assembly type anti-explosion protective plate can be controlled, and the fast assembly type anti-explosion protective plate is convenient to construct.

Description

technical field [0001] The invention belongs to the technical field of disaster prevention and reduction in civil engineering, and in particular relates to a quick-assemble anti-explosion protective plate for the main girder of a steel bridge and a manufacturing and assembling method thereof. Background technique [0002] The main long-span bridges of steel structure bridges are the lifeblood of traffic. When wars explode, they are prone to explosions and accompanying high temperatures. Steel structure bridges are prone to failure of the entire structure due to local steel beam damage. Therefore, the research on fire and explosion protection of steel structure bridges has received extensive attention at home and abroad. [0003] It is the most typical method to clad steel on the outer layer of the structure that needs anti-blast protection, but this method usually does not consider the reflection and superposition characteristics of shock waves, and the anti-blast protection...

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Problems solved by technology

[0003] It is the most typical method to clad steel on the outer layer of the structure that needs anti-blast protection, but this method usually does not consider the reflection and superposition characteristics of shock waves, and the anti-blast protection effect is general

In addition, thickening the concrete layer to increase the overall rigidity is also a relatively common practice. However, this method is often due to poor construction quality. In the case of contact explosion or near-field explosion, the anti-blast protection effect is not good, and the construction cost is relatively high.

[0004] In recent years, studies have found that aluminum foam has an excellent ability to absorb the energy of explosion shock waves, which can reduce the peak stress to a greater extent. The explosion protection layer does not have the best effect, usually as an interlayer or surface layer as an anti-blast protection layer

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