Chambering type high-elongation steel-structure beam-column joint connected by shape memory alloy and construction method thereof

Abstract

The invention discloses a chambering type high-elongation steel-structure beam-column joint connected by shape memory alloy and a construction method thereof. The chambering type high-elongation steel-structure beam-column joint comprises a steel column, a steel beam, a square steel tube, an angle steel, a stiffening rib, a shape memory alloy bolt bar and high-strength bolts. The angle steel comprises a first angle steel and a second angle steel; the square steel tube and the first angle steel are arranged on the side surface of the steel column of the outer surface of a flange of the steel beam from inside to outside correspondingly; the square steel tube is connected with the flange of the steel beam through the high-strength bolt; the first angle steel is connected with the flange of the steel beam through the high-strength bolt; the two ends of the shape memory alloy bolt bar penetrate through a flange of the steel column and the square steel tube correspondingly and are fixed on the first angle steel; and a chambering type bolt hole is formed in a web of the steel beam, the web of the steel beam and the flange of the steel column are connected through the second angle steel and the high-strength bolt, and a gap is reserved between the steel column and the steel beam. According to the chambering type high-elongation steel-structure beam-column joint connected by shape memory alloy and the construction method thereof, the shape memory alloy bolt bar and the chambering type bolt hole can effectively increase the abilities of deformation and energy consumption of a connecting joint, welding-seam connection is not adopted between joints, the possibility of brittle fracture is prevented from happening on the joints, and meanwhile the chambering type high-elongation steel-structure beam-column joint has the advantages that the construction is convenient, and repairing can be rapidly conducted after an earthquake happens.

Description

technical field [0001] The invention belongs to the technical field of structural engineering, and in particular relates to a beam-column node of a reaming type high-ductility steel structure connected by a shape memory alloy and a construction method thereof, which is suitable for building structures with high seismic fortification intensity. Background technique [0002] Good ductility and energy dissipation capacity are the key factors to ensure that the structure does not collapse when it encounters strong earthquakes, and the mechanical properties of joints are one of the key factors that affect the seismic performance of the overall structure. Before the Northridge Earthquake in the United States and the Hanshin Earthquake in Japan, the engineering field mainly used all-welded connections or flange welding, web bolt connections, etc. for steel structure beam-column joints, but after the earthquake, the welds in these joints became brittle. fracture. In order to improv...

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Problems solved by technology

At present, beam-to-column joints connected by end plates have good ductility, but their energy dissipation capacity is limited, and the end plates and steel beams are still connected by welds, so brittle fracture may also occur; dog-bone joints (at the beam end Weakening at the upper and lower flanges) can make the damage occur at the beam end, and meet the seismic principle of strong joints and weak members, but weakening the flanges will reduce the bearing capacity of the structure; the use of reinforced joints can ensure the bearing capacity of the joints, but the plate parts The joints are mainly connected by welding, which cannot increase the ductility of the joints and aggravate the brittle failure of the joints

[0003] In addition, earthquakes are accidental events with many uncertain factors, which may cause buildings to experience earthquakes beyond the fortification intensity

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