Bridge pier anti-collision protective cylinder with low rigidity and high energy consumption

Abstract

The invention discloses a bridge pier anti-collision protective cylinder with low rigidity and high energy consumption. The anti-collision protective cylinder is of an annular columnar structure formed by connecting 2-4 anti-collision protective sheets through a pin rod system, and the anti-collision protective sheets are independent from each other and can be freely transported, installed, dismantled and replaced, so that maintenance and replacement after vehicle and ship impact are facilitated. The anti-collision protective sheets are filled with negative Poisson ratio cavity modules, so that the anti-collision protective sheets not only have the advantage of small initial rigidity of cavity structures, but also have special mechanical properties of the negative Poisson ratio structure,transverse compression also occurs when longitudinal compression occurs when vehicle and ship impact happens, the cavity structures are collected to an impacted area, local density and lateral rigidity are increased, and damping force and the energy absorption effect can be effectively improved. The protective cylinder has the beneficial effects of small initial rigidity, compression reinforcement, high bearing capacity, high energy consumption and the like. In addition, through the variable thickness design of negative Poisson ratio cavity module pressure-bearing plates, gradient energy consumption and gradient rigidity can be realized, and good buffer adaptability is achieved for vehicle and ship impacts under different impact energies.

Description

technical field [0001] The invention relates to a bridge pier anti-collision protection tube with low rigidity and high energy consumption, belonging to the field of vehicle and ship anti-collision and disaster reduction for bridge structures. Background technique [0002] In recent years, with the rapid growth of the national economy, there are more and more vehicles such as ships and vehicles, and their appearance size and traffic density are also increasing. Coupled with the harsh changes in the external environment and subjective factors such as drunk driving and fatigue driving, frequent occurrences of vehicles, ships, etc. Accidents that hit bridge piers not only affect the safety and life of the bridge, but also threaten the safety of vehicles and ships, and even cause major catastrophic accidents. Therefore, it is necessary to take effective measures to avoid the impact of vehicles and ships on the bridge pier or reduce the damage caused by the impact of vehicles and...

AI Technical Summary

Problems solved by technology

Different devices have their own characteristics. For example, the rubber fender has a large displacement when it is hit, but the energy absorption is small; the concrete structure protection and the steel sleeve box consume the impact kinetic energy through plastic deformation, but their rigidity is high, and a large collision force will occur at the moment of collision.

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