Bridge three-way limit device and bridge three-way limit vibration reduction structure

Abstract

The invention discloses a bridge three-way limit device and a bridge three-way limit vibration reduction structure which have the limit and buffering effects on vertical, longitudinal and horizontal displacement of a beam body and can effectively reduce the damage of earthquake to a bridge structure. The bridge three-way limit device comprises a foundation, and an inverse-L-shaped rigid clamp falcon which consists of a steel vertical limb and a horizontal limb; the lower end of the vertical limb is integrally and fixedly connected with the foundation; and the upper end of the vertical limb and the front end of the horizontal limb are provided with a vertical limb ball and a horizontal limb ball respectively. The foundation is fixedly arranged on the top of a pier body; a limit groove which extends in the vertical direction is formed in the end of the beam body; and a steel sleeve which extends backwards from the bottom wall of the limit groove in the longitudinal direction is pre-embedded in the bottom of the beam body. The horizontal limb is extended into the steel sleeve, and the vertical limb ball is positioned in the limit groove. A longitudinal gap which can meet the requirement of normal longitudinal displacement when the beam body is used is reserved between the horizontal limb ball and the bottom of the steel sleeve; and a horizontal gap which can meet the requirement of normal horizontal displacement when the beam body is used is reserved between the vertical limb ball and the wall of the limit groove.

Description

technical field [0001] The invention relates to bridges, in particular to a three-way limiting device for limiting longitudinal, lateral and vertical displacements of bridges, and a bridge three-way limiting shock-absorbing structure using the device. Background technique [0002] Years of earthquake disasters around the world have shown that with the development of urbanization, the transportation network is becoming more and more important in the lifeline system of earthquake resistance and disaster prevention in the whole city. The 1976 Tangshan earthquake, the 1994 Northridge earthquake in the United States, the 1995 Hanshin earthquake in Japan, the 1997 San Fernado earthquake in the United States, and the 1999 Chiji earthquake in Taiwan all caused serious damage to the local transportation network. , leading to huge losses of life and property, and the vertical and horizontal beam drop of bridges is the most prominent form of earthquake damage. [0003] At present, the...

AI Technical Summary

Problems solved by technology

Since the vertical limit, longitudinal and transverse limit devices are separated for these three forms, the structure is complex, and there is a large interference with the beam body reinforcement and prestressed steel beams, cumbersome installation, and high cost.

In addition to the chain-type vertical limit, which has a certain shock-absorbing effect due to the elastic rubber body, the vertical limit of the anchor steel rod or prestressed steel beam has no shock-absorbing effect.

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