Self-resetting steel frame beam-middle column joint and construction method thereof

Abstract

The invention provides a self-resetting steel frame beam-middle column joint and a construction method thereof. The self-resetting steel frame beam-middle column joint comprises two steel beams; the two steel beams are horizontally arranged on two sides of a middle column; a shape memory alloy bent steel plate is arranged between the flange of each of the steel beams and the flange of the middle column; the shape memory alloy bent steel plates are arranged on the outer sides of the flanges of the steel beams; one ends of the shape memory alloy bent steel plates are connected with the flanges of the steel beam, and the other ends are connected with the flange of the middle column; friction energy dissipaters are symmetrically arranged on two sides of webs of the steel beams; and one ends ofthe friction energy dissipaters are connected with the steel beams, and the other ends are connected with the flange of the middle column. The self-resetting function of the joint is achieved throughplastic deformation of the shape memory alloy bent steel plates; and friction energy dissipation can be achieved between the friction energy dissipaters and the flanges and webs of the steel beams, the friction energy dissipaters and the shape memory alloy bent steel plates generate a synergistic effect to jointly absorb earthquake energy at the joint, the structural ductility and energy dissipation capacity of the steel frame beam-middle column joint are effectively improved, and the post-earthquake repair cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of structural engineering, in particular to a self-resetting steel frame beam-center column joint and a construction method thereof. Background technique [0002] The traditional steel frame beam-column joints are mainly welded to form rigid joints, but the post-earthquake joints are prone to brittle failure, and the structural ductility and energy dissipation capacity are poor, and the residual deformation is large, making post-earthquake repairs difficult and costly; With the development of the concept of performance-based seismic design, the functional requirements of improving structural recoverability by controlling the residual deformation of structures after earthquakes have gradually attracted the attention of scholars at home and abroad. [0003] At present, the self-resetting seismic structural system mainly integrates the beam and column components into a whole by introducing post-tensioning prest...

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Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides a self-resetting steel frame beam-column joint and its construction method to solve the energy consumption of the beam-column joint when memory alloy materials are used in the existing beam-column joint. The uncertainty of energy capacity and self-resetting performance is large, and the structural ductility and energy dissipation capacity of nodes are poor technical problems

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