Steel-concrete composite bridge anti-ship collision device and anti-ship collision bridge

Abstract

The invention discloses a steel-concrete combined ship-bridge-collision preventing device of a bridge and the ship-bridge-collision preventing bridge. The ship-bridge-collision preventing device comprises an energy consumption component and a force transmission component, wherein the energy consumption component is fixedly connected with a bridge pier or a bearing platform of the bridge, is arranged to be of a grid type structure, and mainly achieves energy consumption through graduated compression opposite to the direction in which a ship collides with the bridge, the force transmission component comprises an ultrahigh-performance concrete panel fixedly connected to the outer side of the energy consumption component, and the planar extending direction of the concrete panel is basically perpendicular to the graduated compression of the grid structure. According to the ship-bridge-collision preventing bridge, the ship-bridge-collision preventing devices are fixedly connected with the bridge piers or bearing platforms of the bridge, a plurality of ship-bridge-collision preventing devices are distributed at the periphery of each bridge pier or bearing platform of the bridge, or wrapped on each bridge pier or bearing platform continuously; each ship-bridge-collision preventing device is fixedly connected to the corresponding bridge pier or bearing platform in an overhung mode. The ship-bridge-collision preventing device is clear in force transmission path, stable in energy consumption mode, high in energy consumption efficiency, good in corrosion resistance, high in safety performance and easy and convenient to construct.

Description

technical field [0001] The invention relates to a bridge anti-ship collision device, in particular to a device using a steel-concrete combined structure to prevent ships from colliding with a bridge. Background technique [0002] When designing bridges in navigable waters, ship collision issues must be considered. Otherwise, the bridge structure may be damaged or even collapsed, resulting in huge economic losses, casualties and very negative social impact. Between 1960 and 2007, 34 major bridges around the world collapsed due to ship strikes, killing 346 people. When the ship collision power demand is greater than the anti-collision capacity of the bridge structure, it is necessary to install the necessary anti-collision devices to reduce the risk of bridge ship collision damage. [0003] At present, according to the relationship between anti-collision measures and bridge structures in space, they can be divided into two categories: (1) independent anti-collision structure...

AI Technical Summary

Problems solved by technology

However, such traditional anti-collision measures for steel structures have the following deficiencies: (1) Due to the use of thin steel plates as the panels, the steel panels will be damaged prematurely under the impact of the ship, so that the components participating in energy consumption are very limited, and the energy consumption efficiency is low; (2) Internal energy-dissipating components mostly adopt the form of isotropic cells, most of which have isotropic stiffness, and there is little difference in vertical and horizontal stiffness, which makes the failure mode of the structure hit by the ship uncertain and uncontrollable. It is impossible to accurately estimate and predict the energy dissipation capacity of the structure; (3) the steel panel is easy to corrode, and the anti-collision capacity of the bridge will gradually decrease during the whole life of the bridge, making it the most vulnerable component, further deteriorating the energy dissipation capacity of the anti-collision structure; (4) When flammable ships collide, direct steel-steel contact may cause fire or explosion

This solution can increase the rigidity of the outer steel plate to a certain extent through a complex structure, but it cannot fundamentally solve the problems of traditional steel structure fenders (for example, if the steel structure outer plate is still used, the stiffness will be significantly reduced after corrosion, etc.) , and make the manufacturing process more complex

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