Vertical beam falling-off prevention system

Abstract

The invention discloses a vertical beam falling-off prevention system. The system comprises three parts: the first part are square mesh energy consumption falling-off prevention beams placed and connected between a beam bottom and a capping beam, the second part are sliding cylinder connecting rod devices connected with two side surfaces of a bridge end above a pier and abutment, and a third part are anti-collision pieces placed at connection parts of bridge web boards. The invention relates to a vertical limit energy consumption beam falling-off prevention protective device for a bridge under earthquake. The protective device is simple in manufacturing, convenient to assemble and light in self weight. During normal operation, the device can be freely stretched out and drawn back along with the structure, under the action of the earthquake, the square mesh energy consumption falling-off prevention beams and sliding connecting rods drive shape memory alloy wires to be stretched for bearing force and wasting energy so as to effectively absorb earthquake destroy energy, and can limit the bridge to generate large displacement, so that under the action of strong shock, the damage due to the falling off of beams is effectively prevented, and the anti-collision pieces at the beam end can prevent the beam from collision. The system provided by the invention can effectively solve the problem that vertical displacement safety, continuous energy consumption capacity and falling off beam capacities of railway bridges under earthquake can not be ensured.

Description

technical field [0001] The invention relates to a bridge longitudinal anti-drop beam system, in particular to a bridge longitudinal anti-seismic energy consumption anti-collision anti-fall beam device based on a shape memory alloy. Background technique [0002] Strong earthquakes occur frequently around the world, such as Indonesia, New Zealand, and East Japan. In recent years, my country has also experienced major earthquakes in Wenchuan, Yushu, and Ya'an, which have produced strong economic and social impacts. [0003] It can be seen from the previous earthquake damages that the most frequent damage forms of bridge structures are falling beam damage and collision damage. my country is a country with a high incidence of earthquakes, and has many historical lessons of severe earthquake damage. Although they have greatly promoted the improvement of the anti-seismic fortification system of building structures, there are still great defects in the anti-seismic performance of ex...

AI Technical Summary

Problems solved by technology

The invention provides an anti-seismic, energy-consuming, anti-collision, and anti-falling beam device for longitudinal bridges based on shape memory alloys, which meets the requirements for normal operation and use, and solves the problem of anti-seismic, energy-consuming, and anti-falling beams of bridges under earthquakes

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