An anti-fall beam structure with variable damping

Abstract

The invention relates to the technical field of bridges, and specifically discloses a variable damping anti-drop beam structure, including a bridge pier and a first main girder and a second main girder placed on the bridge pier, the first main girder and the second main girder A partition support is provided between the beams, a first damping structure is provided between the first main beam and the second main beam, and the partition support is connected to the bridge pier through a second damping structure, so The first damping structure includes a first energy dissipation strip plate, a second energy dissipation strip plate and a pressing mechanism, the first energy dissipation strip plate is fixed on the end face of the first main beam, the The second energy-dissipating strip is fixed on the end face of the second main beam, and the side of the first energy-dissipating strip is in contact with the side of the second energy-dissipating strip. The device of the present invention can It is necessary to adjust the damping stiffness of its energy consumption to ensure that it is in good working condition at all times and prevent the bridge from falling.

Description

technical field [0001] The invention relates to the field of bridges, and specifically discloses a variable damping anti-drop beam structure. Background technique [0002] When the bridge is subjected to a strong earthquake, the bridge will bear a large load in an instant, resulting in a large displacement. The displacement exceeds the shelving length of the beam or the beam will fall due to insufficient strength of the stopper, which will cause irreparable damage. serious loss. The anti-fall beam is a connection measure structure used in the bridge structure to resist earthquakes and prevent the beam body from falling or disengaging. The current common practice is to add anti-fall beams between the main girders to prevent the longitudinal or lateral displacement of the main girders. [0003] Due to changes in temperature, thermal expansion and contraction of the main girder will easily cause changes in its axial length. The energy-consuming damping stiffness of conventiona...

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Problems solved by technology

[0003] Due to changes in temperature, thermal expansion and contraction of the main girder will easily cause changes in its axial length. The energy-consuming damping stiffness of conventional anti-fall beam construction measures is not adjustable, so the change of the main girder has caused the working performance of the anti-fall beam decline, often unable to meet the needs of their work

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