Main beam anti-falling beam and energy dissipation device with multiple protection functions and manufacturing method thereof

Abstract

The invention relates to the field of vibration resistance and damping of bridges, in particular to a main beam anti-falling beam and energy dissipation device with multiple protection functions and amanufacturing method thereof. The main beam anti-falling beam and energy dissipation device comprises a bridge pier, wherein support seat bedding stone is arranged above the bridge pier; a rubber support seat is arranged on the support seat bedding stone; a stay cable and a vibration damping device are arranged between the bridge pier and a beam body. The manufacturing method of the main beam anti-falling beam and energy dissipation device comprises the following steps of sequentially binding and installing reinforced bars of the bridge pier, horizontal embedded steel plates, and reinforced bars of longitudinal blocks; then, casting the concrete of the bridge pier and the longitudinal blocks, and installing a vibration damping bedding block; installing the rubber support seat, lifting thebeam body, and installing the stay cable. The main beam anti-falling beam and energy dissipation device has the advantages that under the function of small vibration, the longitudinal blocks with thevibration damping bedding blocks are used for vibration damping and energy dissipation so as to reduce the occurrence of rigid collision between the two adjacent beam bodies; under the function of large vibration, the longitudinal blocks are sheared, the functions of the stay cable are realized, the overlarge displacement amplitude of the beam body along the longitudinal direction and transversedirection is limited, and the occurrence of beam falling and vibration damage is prevented; the vibration resistance property of the whole bridge is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to the field of anti-seismic and shock-absorbing bridges, in particular to a multi-protection girder anti-fall beam, an energy-consuming device and a manufacturing method thereof. technical background [0002] In the past 30 years, earthquake disasters have occurred frequently at home and abroad. Many bridges have collapsed or been severely damaged, cutting off the lifeline of traffic in the earthquake area and causing huge loss of life and property. Typical damage forms of bridges in previous earthquakes include: Seat slippage, expansion joint damage, block damage, adjacent girder collision damage and abutment cracking damage; at present, bridges with small and medium spans generally use plate rubber bearings, and the sliding mechanism of plate rubber bearings helps to reduce The seismic response of the superstructure, and to a certain extent, protect the bridge piers and foundations from large earthquake damage; however, in some...

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Problems solved by technology

[0002] In the past 30 years, earthquake disasters have occurred frequently at home and abroad. Many bridges have collapsed or been seriously damaged, cutting off the lifeline of traffic in the earthquake area and causing huge loss of life and property. Typical damage forms of bridges in previous earthquakes include: Seat slippage, expansion joint damage, stopper damage, adjacent girder collision damage and abutment cracking damage; at present, bridges with small and medium spans generally use plate rubber bearings, and the sliding mechanism of plate rubber bearings helps to reduce The seismic response of the superstructure, and to a certain extent, protect the bridge piers and foundations from large earthquake damage; however, in some high-intensity areas, the bridge will undergo a large displacement under the action of the earthquake, and when the displacement exceeds the allowable value, it will This will lead to the collision of the superstructure or the earthquake damage of falling beams, which will seriously affect the development of rescue work after the earthquake.

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