Scalable and gradually energy-dissipating anti-fall beam structure

Abstract

The invention discloses a girder falling prevention structure capable of achieving gradual telescopic energy consumption. The girder falling prevention structure comprises a box girder and a limiting bridge pier arranged at the end of the box girder; the limiting bridge pier is provided with a partition body and a telescopic mechanism, the partition body is arranged in the transverse direction of the box girder and is used for partitioning two longitudinally-connected box girders, the telescopic mechanism is arranged on the side face of the partition body, and the box girder is arranged on the limiting bridge pier through the telescopic mechanism; limiting structures are correspondingly arranged on the box girder and the limiting bridge pier, transverse-longitudinal restraint of the box girder on the limiting bridge pier is achieved through mutual embedding and partitioning of the box girder and the limiting bridge pier, girder falling of the box girder in the transverse direction and the longitudinal direction in an earthquake is effectively prevented, therefore, a bridge can continue to be used and keep smooth after the earthquake, and personnel injuries and property losses which are brought by the earthquake are reduced and even eliminated.

Description

technical field [0001] The invention belongs to the field of bridges, and in particular relates to a retractable and gradually energy-consuming anti-fall 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. One of the most direct ways to limit the displacement is to use the limit measures to restrain the vibration of the upper structure. The current general practice is to install transverse anti-vibration blocks on the top of bridge piers, and to install anti-fall beam chains or tie rods between box girders. However, when subjected to strong earthquakes, common anti-seismic measures are still not enough to prevent longitudinal beams from falling . Contents of the inventio...

AI Technical Summary

Problems solved by technology

The current general practice is to install transverse anti-vibration blocks on the top of bridge piers, and to install anti-fall beam chains or tie rods between box girders. However, when subjected to strong earthquakes, common anti-seismic measures are still not enough to prevent longitudinal beams from falling

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