Non-restraint connecting joint of support type damper and existing RC frame structure

Abstract

The invention relates to the technical field of shock resistance, energy dissipation and shock absorption of building structures, in particular to a non-restraint connecting joint of support type dampers and an existing RC frame structure. The non-restraint connecting joint comprises support type dampers, non-constraint joint plates, end plates, shear plates and pull rods, wherein a beam is sequentially divided into a tensile function area, a shear function area and a beam end expected plastic hinge area from the near column end to the far column end; the pull rods are arranged on the side surface of the tensile functional area; the shear plates are fixed on the upper surface and the lower surface of the shear function area; and the beam end expected plastic hinge area is a non-functionalarea behind the shear function area. The non-restraint connecting joint can effectively solve the problem that the beam is easily damaged due to complex stress caused by post-anchoring connection between the non-constraint joint plates and the existing concrete frame beam, and is suitable for shock resisting strengthening of the existing building.

Description

technical field [0001] The invention relates to the technical field of anti-seismic and energy-dissipating shock absorption of building structures, in particular to a non-constrained connection node between a support type damper and an existing RC frame structure. Background technique [0002] With the rapid development of the modern economy and the continuous improvement of living standards, people have put forward more and more requirements for the quantity, quality and use functions of buildings. The progress of science and technology has also prompted various new structures, new materials and new construction The craft keeps coming. While satisfying the number of buildings, people also put forward higher and higher requirements for the shape, safety, applicability and durability of buildings. According to relevant statistics, my country's construction industry has begun to move from a period of large-scale new construction to a period of modern reinforcement and transfo...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the research on the existing problems in the existing RC frame structure when the support type damper is used in the prior art. There are also the following problems: (1) the node area cannot be functionally divided, As the connection area between the gusset plate and the beam and the expected plastic hinge area of ​​the beam, the two will affect the seismic performance of the structure due to the interaction; (2) the gusset plate is only connected to the beam, so that the supporting axial force is completely borne by the beam, which is easy to cause the beam end shear yielding and fracture; there is a large eccentricity between the support and the beam; (3) it is not suitable for old buildings, too many longitudinal reinforcements at the beam end will cause too dense reinforcement, and the additional prestressed steel rods penetrate the beam height and easily The steel bars in the beam have collided, the design is more difficult, the construction work is more complicated, and the steel bars are easy to corrode

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