A self-reactive anti-fall beam structure

Abstract

The invention relates to the field of bridges, and provides a self-reactive anti-drop beam structure, which is arranged between the beam body and the bridge pier, and includes two telescopic devices. The two telescopic devices are respectively arranged on both sides of the beam body. The telescopic devices include: The first connecting block, the first end of the first connecting block is movably connected with the pier, and the second end of the first connecting block is formed with a first receiving groove and a second receiving groove extending inward; the second connecting block, the second connecting The first end of the block is arranged in the first receiving groove and is slidably connected with the groove wall of the first receiving groove, the second end of the second connecting block is movably connected with the beam body, and an extension part is formed on the second connecting block, extending The part is arranged in the second receiving groove and is slidably connected with the groove wall of the second receiving groove; and the spring is arranged in the second receiving groove and can move freely in the second receiving groove. The self-response anti-drop beam structure provided by the invention is not easy to be damaged during an earthquake, and the practicability of internal energy-dissipating elements is high.

Description

technical field [0001] The invention relates to the field of bridges, and specifically discloses a self-reactive anti-drop beam structure. Background technique [0002] In destructive earthquakes, excessive displacement of the bridge superstructure and earthquake damage from falling beams are common. In the Wenchuan Earthquake, the earthquake damage caused by falling girders was extremely serious. When the girder body fell and hit the bridge piers and abutments, it would cause secondary damage to the lower structure, which may cause greater earthquake damage. [0003] The anti-fall beam structure is to limit the relative displacement between the pier beams and prevent the beams from falling due to the excessive relative displacement of the pier beams, further aggravating the earthquake damage. But there are following problems in existing falling beam structure: 1. because the shear wave of earthquake and longitudinal wave can cause the irregular motion of beam body, so exis...

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Problems solved by technology

However, there are the following problems in the existing falling beam structure: 1. Because the shear wave and longitudinal wave of the earthquake can cause the irregular movement of the beam body, the existing anti-falling beam structure is relatively easy to be destroyed during an earthquake

2. The energy-consuming components inside the existing anti-fall beam structure are mainly oil dampers, which are prone to oil leakage and have poor practicability

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