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Assembled integral beam-column joint with shape memory alloy reinforcement and its construction method

A technology of memory alloy and beam-column joints, which is applied in the processing of building materials, construction, building construction, etc., can solve the problem of weakening of the early strength, stiffness and bearing capacity of assembled integral beam-column joints, and the bonding of new and old concrete contact surfaces Performance and shear performance are poor, node performance cannot be achieved, etc., to achieve the effect of improving connection performance, improving early stiffness and overall performance, and improving shear performance

Active Publication Date: 2022-05-13
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, when the assembled integral beam-column joint is under earthquake action or under a large force, the end of the prefabricated beam bears a large bending moment and shear force, and at the same time, the bonding performance and shear performance of the contact surface between the old and new concrete are poor , vertical cracks appear prematurely between the prefabricated beam end and the beam-column joint area, which leads to a certain weakening of the early strength, stiffness and bearing capacity of the assembled integral beam-column joint, and affects the assembly integral beam-column joint Appearance and normal use, so that the node performance of this type of connection cannot reach the performance equivalent to that of cast-in-place

Method used

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  • Assembled integral beam-column joint with shape memory alloy reinforcement and its construction method
  • Assembled integral beam-column joint with shape memory alloy reinforcement and its construction method
  • Assembled integral beam-column joint with shape memory alloy reinforcement and its construction method

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with accompanying drawing.

[0044] Such as Figure 2 to Figure 5As shown, an assembled integral beam-column node provided with shape-memory alloy bars of the present invention includes a prefabricated beam 1 and a prefabricated column 13; the end of the prefabricated beam 1 is provided with a U-shaped keyway 3 at the beam end, and the upper part of the prefabricated beam 1 is The post-cast laminated layer 2, the prefabricated beam stirrups are open stirrups 6, the lower longitudinal reinforcement 7 of the prefabricated beam is located in the precast concrete 12, and the lower longitudinal reinforcement 7 of the prefabricated beam can also be anchored by bending 17 in the U-shaped keyway 3 at the beam end ; The width of the beam-end U-shaped keyway 3 reserved at the end of the prefabricated beam should not be less than 1 / 3 of the beam width, and should not be less than 150mm.

[0045] The prefabricate...

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Abstract

The invention discloses an assembled integral beam-column joint provided with shape memory alloy ribs and a construction method. A through-length beam longitudinal bar is placed in the superimposed layer of a prefabricated beam; The long shape-memory alloy bars are heated by electricity after the concrete is poured, and prestress is applied to the assembled beam-column joints through the deformation of the shape-memory alloy bars. The assembled beam-column joint of the present invention applies prestress through the shape-memory alloy reinforcement, which can solve the disadvantages of the assembled integral beam-column joint in the splicing parts of prefabricated components, which have poor performance and are prone to cracks, and improve the performance of the assembled integral beam-column joint. At the same time, the construction is simple and the performance of the assembled integral beam-column joint is better.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to an assembled integral beam-column joint provided with shape-memory alloy bars and a construction method. Background technique [0002] The goal of assembling integral concrete beam-column joints is to achieve the equivalent of cast-in-situ. When assembling integral beam-column joints, the overall performance and seismic performance, including parameters such as strength, stiffness, bearing capacity, energy dissipation, ductility, and damping coefficient, are basically equivalent to those of existing concrete beam-column joints. When pouring beam-column joints, the existing design rules for cast-in-place reinforced concrete structures can be applied, which is easy to popularize and apply prefabricated concrete structures. The commonly used design and construction scheme for assembling integral beam-column joints is as follows: the beam-column components are prefabricated...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/30E04B1/18E04B1/58E04G21/14
CPCE04B1/30E04B1/18E04B1/58E04G21/14
Inventor 董志强范家俊朱虹吴刚
Owner SOUTHEAST UNIV
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