Compound multilayer explosion-proof device used for viaduct pier

Abstract

The invention discloses a compound multilayer explosion-proof device used for a viaduct pier. The compound multilayer explosion-proof device used for the viaduct pier comprises a macromolecular elastomer, a round steel pipe and a void space which are sequentially arranged outside the pier from inside to outside, wherein the macromolecular elastomer is bonded with the pier and a steel plate by virtue of glue, the round steel pipe is connected with the steel plate and the void space in a welding manner, and the void space is composed of an inner steel plate and an outer steel plate. The compound multilayer explosion-proof device used for the viaduct pier has the advantages that an energy conservation principle is utilized, devices, namely the macromolecular elastomer, the round steel pipe and the void space, are arranged at the periphery of the viaduct pier, dynamic response such as acceleration and displacement of the pier under the action of explosion in the air can be effectively reduced, pressure of shock wave is relieved, action of the pressure of the shock wave on the pier is alleviated, energy, acting on the pier, of the shock wave is absorbed by virtue of plastic deformation of the steel pipe and elastic deformation of the macromolecular elastomer, and damage of the viaduct pier under non-contact explosion and contact explosion load is reduced, so that the aim of protecting the viaduct pier is achieved.

Description

technical field [0001] The invention belongs to the field of disaster prevention and mitigation of bridge structures in civil engineering, in particular to the field of safety of bridge piers in bridge structures, and more specifically relates to an anti-explosion protection device for viaduct bridge piers. Background technique [0002] In recent years, terrorist bombing attacks have occurred frequently, and the explosive destruction of bridge projects through car bombs has become one of the main means for terrorists to achieve their terrorist attack goals; in addition, accidental explosion accidents, such as fireworks explosions, oil and gas, etc. The accidental explosions that occurred in the middle of the accident, the harm caused to the bridge project can not be ignored; more importantly: in the face of the complex and changeable international environment, winning the conventional war under local high-tech conditions has become the goal of our country's defensive national...

AI Technical Summary

Problems solved by technology

[0005] At present, there are anti-knock protection devices for piers below deep water, but the anti-knock protection principle of underwater pier columns is different from that of above-water pier columns, so the anti-knock protection devices of underwater pier columns cannot be used for above-water pier Anti-knock protection of columns

The piers of viaducts are generally located above the road surface (above the water surface), and are more prone to explosion accidents than piers below the water surface. Once the pier columns are damaged, it will inevitably cause the overall collapse of the viaduct, which is more difficult to repair than damage to the bridge deck alone.

Therefore, there is an urgent need for anti-blast protection of viaduct piers, but at present there is no anti-blast protection device for viaduct piers, and it is difficult to carry out anti-blast protection for viaduct piers

[0006] Without protection, the bridge piers of viaducts will be directly affected by the blast air shock wave and explosion products. The bridge piers are generally built with reinforced concrete, which has a large overall rigidity and poor crack resistance of concrete. When a non-contact explosion with a large explosive equivalent and a contact explosion on the surface of the pier column will cause serious damage to the pier column, it may even cause the pier column to collapse, thereby destroying the bridge as a whole

In the current bridge design process, there is a lack of anti-blast design codes, the effect of blast loads is not considered in conventional design, and there are no anti-blast protection measures. The stiffness, strength or ductility of a large number of bridge piers no longer meet the anti-blast requirements.

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