Design method of energy dissipation composite structure composed of steel plate and foamed aluminum material

Abstract

The invention discloses a design method of an energy dissipation composite structure composed of a steel plate and a foamed aluminum material, and belongs to the technical field of pier collision avoidance. Aiming at the existing problems of the pier anti-collision device, the low-speed impact process of the energy-consuming composite structure is realized through numerical simulation, the low-speed impact response of the energy-consuming composite structure is obtained, and the deformation failure mechanism of the energy-consuming composite structure is analyzed; the dynamic response of the energy consumption composite structure with different structure design parameters under the action of different impact energy is calculated to obtain a force-displacement curve; an anti-collision performance index of the energy consumption composite structure is calculated; the anti-collision performance indexes are analyzed, the optimal thickness of the steel plate, the optimal thickness of the foamed aluminum and the optimal density of the foamed aluminum under the action of different low-speed impact energy are determined, and the design is completed. The energy-absorbing and buffering performance is better, the impact wave acting time can be effectively prolonged, the impact load is reduced, the drift ice impact resistance is improved, and the effect of protecting the pier is achieved.

Description

technical field [0001] The invention belongs to the technical field of bridge pier anti-collision, and in particular relates to a design method of an energy-dissipating composite structure composed of steel plates and foamed aluminum materials. Background technique [0002] Bridges are the throat of transportation and an important part of transportation infrastructure. However, bridges located in alpine regions are often threatened by ice drifts in spring, especially in years with severe ice conditions. Ice damage often occurs, and huge and hard ice platoons will have greater impact and compression on bridge pier structures located in rivers. The force will not only cause the concrete on the outer surface of the bridge pier to fall off and the steel bars will be exposed to corrosion, but will also cause a large lateral displacement at the top of the bridge pier, thus affecting the safe operation of the bridge. In order to enhance the ability of the bridge piers to resist th...

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Problems solved by technology

[0003] The present invention aims at reducing the damage of the pier by improving the strength of the protective structure and resistance to deformation of the existing design of the anti-collision device for the bridge pier, ignoring the problem of the energy consumption and buffering performance of the anti-collision device, and provides a material made of steel plate and aluminum foam Design method for energy-dissipating composite structures composed of

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