High-strength screw sliding embedded part connecting joint used for supporting concrete frame

Abstract

The invention provides a high-strength screw sliding embedded part connecting joint used for supporting a concrete frame. The connecting joint comprises a beam joint unit, a column joint unit above the beam joint unit, rubber layers, bonding-free layers, and a joint plate unit, the joint plate unit is connected with the beam joint unit and the column joint unit, the beam joint unit comprises a first horizontal embedded steel plate, a second horizontal embedded steel plate and a first vertical screw, the outer wall of the first vertical screw is provided with the rubber layer, the column jointunit comprises a first vertical embedded steel plate, a second vertical embedded steel plate and a second horizontal screw, the rubber layer is mounted on the outer wall of the second horizontal screw, and the bonding-free layers are mounted on surfaces where the first horizontal embedded steel plate, the second horizontal embedded steel plate, the first vertical embedded steel plate and the second vertical embedded steel plate make contact with concrete. The problems of joint breakage and beam and column shear damage caused by a concrete frame supporting joint opening and closing effect can be effectively solved through the connecting joint, and the axial rigidity of an embedded part under the supporting tension effect can be improved.

Description

technical field [0001] The invention relates to the technical field of civil engineering structures, in particular to a connection node of high-strength screw sliding embedded parts for supporting concrete frames. Background technique [0002] my country is one of the earthquake-prone countries in the world, and it is also the country with the most serious earthquake disasters. The serious damage and collapse of buildings under the action of earthquakes is a major cause of casualties and property losses. Effectively avoiding and mitigating the earthquake damage of building structures is the most important task for the aseismic design and researchers of engineering structures in my country. Buckling-resistant braces, as a new type of energy-dissipating shock-absorbing damper, can effectively improve the lateral stiffness of the structure and reduce the elastic interlayer deformation of the structure under the action of small earthquakes, and can significantly improve the equi...

AI Technical Summary

Problems solved by technology

[0004] The normal and tangential dual force transmission paths of traditional joints will have a strong constraint effect on beam-column members, which limits the bending deformation of beam-column members, forms a rigid domain effect at beam-column joints, and reduces the bending length of beam-column members. Significantly increase the stiffness of the beam-column members, resulting in a significant increase in the overall structural seismic force and shear forces of the beam-column members

At present, finite element and structural tests have proved that the lateral stiffness of the concrete structure after using this joint is 1.6 times that of the corresponding stiffness without this joint, which significantly increases the shear force of beams and columns by 30%, resulting in the shear of beams and columns in advance. The internal force of the support cannot be transmitted due to shear damage, causing the support to lose its energy dissipation and shock absorption effect in advance

[0005] (2) Change of failure mode of beams and columns and transfer of plastic hinges

[0006] The traditional joints form strong tangential constraints on the deformation of the beam-column members through the shear action of the studs, causing the plastic hinge of the beam-column to transfer from the beam-column interface to the position outside the gusset plate area, even beyond the densified area of ​​the beam-column stirrup In this area, the beam-column plastic hinge appears in the non-densified area where the stirrups are sparse, which significantly reduces the plastic deformation capacity of the beam-column component, resulting in the inability of the main structure and the support to deform and consume energy in advance, and the bearing capacity drops in advance, which cannot withstand large earthquakes. Good transmission of support internal force and play the role of support energy consumption

[0007] In summary, the tangential and normal dual restraints and two-way force transmission mechanism of the embedded parts of the traditional concrete frame support joints will cause the problems of internal force amplification and plastic deformation capacity reduction of beam-column members, which will reduce the energy consumption and Seismic performance of the overall structure

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