Steel friction hinge energy dissipation straining beam structure for double column piers and construction method thereof

Abstract

The invention discloses a steel friction hinge energy dissipation straining beam structure for double column piers. The steel friction hinge energy dissipation straining beam structure comprises a cross beam arranged between two pier stand columns, the two ends of the cross beam are connected to the outer walls of the two vertically-arranged pier stand columns through steel sleeves and lug beams correspondingly, and the outer walls of the pier stand columns are sleeved with the steel sleeves through shear-resistant welding studs; one end of the lug beam is welded outside the steel sleeve, and the other end is connected with the cross beam through pressure applied by the prestressed reinforcement to form a steel friction hinge structure. The invention further discloses a construction method of the steel friction hinge energy dissipation straining beam structure for the double column piers. According to the steel friction hinge energy dissipation straining beam structure for the double column piers and the construction method thereof, the structure is simple and practical, the transverse compression resistance stability and transverse rigidity of the double column piers can be improved, earthquake input energy is absorbed through plasticity of the straining beam, meanwhile, residual deformation of the straining beam is reduced through superelasticity of the shape memory alloy, and the straining beam with residual deformation after the earthquake is convenient to repair.

Description

technical field [0001] The invention relates to the field of anti-seismic and shock-absorbing technologies of bridge structures, in particular to a steel friction hinge energy-dissipating beam structure for double-column piers and a construction method thereof. Background technique [0002] Due to the complex topography and landforms in western China, highway and railway lines often cross deep mountains and valleys. The statistical results of bridges built or under construction in the western region show that more than 40% of the bridge piers are over 40m high. 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 two columns, so as to increase the lateral stiffness of the pier and improve its lateral stability. [0003] At present, reinforced co...

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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

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