A steel friction hinge energy-dissipating tie-beam structure for double-column piers and its construction method

Abstract

The invention discloses a steel friction hinge energy-dissipating tie beam structure for double-column piers. On the outer wall of the set pier column, the steel sleeve is sleeved on the outer wall of the pier column through shear welding studs, one end of the ear beam is welded to the outside of the steel sleeve, and the other end is connected to the beam through the pressure exerted by the prestressed steel bar to form a steel friction hinge. structure. The invention also discloses a construction method of a steel friction hinge energy dissipation tie beam structure for a double-column pier. The invention is used for the steel friction hinge energy dissipation tie-beam structure of the double-column pier and the construction method thereof, which is simple and practical; The superelasticity of the shape memory alloy is used to reduce the residual deformation of the tie beam, and it is convenient to repair the tie beam with residual deformation after the earthquake.

Description

technical field [0001] The invention relates to the technical field of earthquake resistance and shock absorption of bridge structures, in particular to a steel friction hinge energy-dissipating tie beam structure for double-column piers and a construction method thereof. Background technique [0002] Due to the complex topography in western China, highway and railway lines often cross deep mountains and canyons. Statistics for bridges built or under construction in the western region show that more than 40% of the bridge piers have a height of more than 40m. The pier height of some bridges exceeds 100m, for example, the pier height of Huatupo Bridge reaches 110m. Bridge structures in this terrain often employ double-column frame piers. In the static design of double-column piers, reinforced concrete tie beams are usually set between the double-columns to increase the lateral stiffness of the pier and improve its lateral stability. [0003] At present, reinforced concrete...

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Problems solved by technology

[0003] At present, reinforced concrete structures are generally used in the design of tie beams for double-column piers, but under strong earthquakes, the tie beams are prone to deformation

In many earthquakes, the damage and failure of reinforced concrete tie beams is a common earthquake damage. It needs to spend manpower, material and financial resources to repair and strengthen after the earthquake, which will affect the post-earthquake traffic recovery and delay the earthquake relief work. The rigidity and stability of the double-column pier tie-beam structure are easily affected

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