Self-reset beam-column joint based on SMA bars and steel structure building

Abstract

The invention discloses a self-reset beam-column joint based on SMA bars and a steel structure building, and belongs to the field of buildings. The self-reset beam-column joint comprises steel beams,steel columns, a connecting plate and at least two SMA bars, wherein the middles of one ends of the steel beams and the connecting plate are provided with round bolt holes correspondingly, one end ofthe connecting plate is fixedly connected with the corresponding steel column, the other end of the connecting plate penetrates through the round bolt holes through bolts to be connected with the steel beams, and a space for allowing the steel beams to rotate around the round bolt holes is reserved between the steel beams and the steel columns; and one ends of the SMA bars are fixedly connected with the steel columns, the other ends of the SMA bars are fixedly connected with the steel beams, and the SMA bars are distributed in an up-down symmetrical mode with respect to the round bolt holes. The self-reset beam-column joint has good energy dissipation performance and the self-reset ability under action of the earthquake load, the allowable deformation range is large, the reciprocating loadbehavior is symmetrical, the self-reset beam-column joint cannot lose the initial stiffness under the lower temperature and after being subjected to large deformation, the structure beams, the structure columns and the joint cannot be damaged after an earthquake, the structure is simple, production and mounting are simple and convenient, and economic benefits are high.

Description

technical field [0001] The invention relates to the field of construction, in particular to a self-resetting beam-column node based on SMA bars and a steel structure building. Background technique [0002] Frame structure is the basic form of multi-story and high-rise structures, and beam-column joints are the basic units of frame structures. The beam-column joints in the frame structure need to transmit axial force, shear force and bending moment, and the force transmission mechanism is complex. Earthquake action is a key factor affecting the safety and service life of buildings, and the beam-column joints of frame structures play a key role in the response of buildings under earthquake action. [0003] In order to improve the seismic performance of buildings, the early beam-column joints were mainly bolted and welded joints. Due to the serious stress concentration at the weld, this kind of joint often occurs brittle fracture under the action of earthquake. The end-reinf...

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Similarly, shape memory alloy components at low temperatures will degenerate and behave like ordinary metal components, resulting in the loss ...

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