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Unequal-strength beam-column joint based on ring rib confined concrete laminated short column

A technology for constraining concrete and beam-column joints, applied in building reinforcements, structural elements, building components, etc., can solve problems such as the impact of unequal strength beam-column point structural performance, and achieve the goal of reducing construction difficulty, ensuring seismic performance, and eliminating the impact. Effect

Inactive Publication Date: 2022-02-08
CHINA RAILWAY CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, in order to facilitate construction and reduce costs, the core area of ​​this type of concrete beam-column joint with unequal strength is poured with lower concrete of the same strength level as the beam-slab. Although this method reduces the strength of the concrete in the core area of ​​the joint, it will give Unequal beam-column point structure performance has a certain influence

Method used

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  • Unequal-strength beam-column joint based on ring rib confined concrete laminated short column
  • Unequal-strength beam-column joint based on ring rib confined concrete laminated short column
  • Unequal-strength beam-column joint based on ring rib confined concrete laminated short column

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] see Figure 1~4 , a beam-column joint of unequal strength based on the composite short column of reinforced concrete with ring reinforcement, including column longitudinal reinforcement 1, column combined stirrup 2, first-strength grade concrete 3, second-strength grade concrete 4, ring reinforcement 5 and short Longitudinal tendons6.

[0031] The design strength of the high-strength grade concrete 4 is more than two grades higher than the design strength of the low-strength grade concrete 3 . It should be noted that in the field of building construction, the second strength grade concrete 4 is higher strength grade concrete, and the first strength grade concrete 3 is lower strength grade concrete.

[0032] The ring bars 5 can be made of materials such as low-grade steel, high-performance steel, and high-performance composite materials.

[0033] The overlapping section of the circular rib 501 of the ring rib 5 adopts double-sided lap welding, and the lap length is not...

Embodiment 2

[0036] see Figure 1~4 , a beam-to-column joint of unequal strength based on short concrete laminated columns confined by ring bars, including

[0037] Concrete column, which constitutes the main structure of the beam-column joint, and it is composed of the first strength grade concrete 3 formed by horizontal pouring, and the second strength grade concrete 4 vertically poured on the upper and lower sides of the first strength grade concrete 3 respectively ;

[0038] Column longitudinal reinforcement 1, which is vertically buried inside the concrete column of the beam-column node, and it is provided with several reinforcement cages bound and fixed by column combination stirrups 2 to form columns;

[0039] A composite short column of concrete with ring reinforcement restraint, which is arranged in the reinforcement cage formed by the column longitudinal reinforcement 1 and the column combination stirrup 2 arranged longitudinally, and it is composed of ring reinforcement 5 and s...

Embodiment 3

[0043] A beam-column joint of unequal strength based on a concrete composite short column constrained by ring bars, the construction method of which comprises the following steps:

[0044] Step 1, according to the reinforcement diagram, bind the column longitudinal reinforcement 1, the column combined stirrup reinforcement 2, the ring reinforcement 5 and the short longitudinal reinforcement 6 to form a reinforcement cage for the column, wherein the first ring reinforcement 5 is bound to the column Combine the stirrup 2, and then tie the short longitudinal reinforcement 6 on the ring reinforcement 5.

[0045] Step 2: According to the reinforcement diagram, the slab reinforcement, the beam longitudinal reinforcement, the beam stirrup, the joint core area stirrup, the ring reinforcement 5 and the short longitudinal reinforcement 6 are bound and formed to form the beam slab and the joint core area reinforcement cage.

[0046] Step 3, pouring the second strength grade concrete 4 of...

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Abstract

The invention discloses an unequal-strength beam-column joint based on a ring bar confined concrete laminated short column. The unequal-strength beam-column joint comprises column longitudinal bars, column combined stirrups, first-strength-grade concrete, second-strength-grade concrete, ring bars and short longitudinal bars. A joint core area is poured by adopting low concrete which is the same as the beam plate, and a ring rib confined concrete laminated short column is arranged in the node core area and is provided with ring ribs and short longitudinal ribs. The joint core area is poured by adopting low concrete which is the same as the beam plate, so that the construction difficulty of the unequal-strength concrete beam-column joint can be reduced; the ring rib confined concrete laminated short column is arrnaged in the joint, transverse deformation of concrete in the joint core area can be restrained, the bearing capacity, ductility and energy dissipation capacity of the joint core area are improved, the anti-seismic property of the joint is improved, the influence of strength reduction of the concrete in the joint core area on the structure is eliminated, and the joint core area is reinforced.

Description

technical field [0001] The invention relates to a unequal-strength beam-column joint, in particular to a unequal-strength beam-column joint based on ring-reinforced concrete laminated short columns. Background technique [0002] In recent years, with the widespread use of high-strength concrete, in order to reduce the cross-sectional area and improve space utilization, high-strength concrete is generally used for columns, and because of the large area of ​​beams and slabs, high-strength concrete is prone to shrinkage cracks, which affects the quality. At the same time, in order to meet its bending resistance requirements, ordinary concrete with a relatively low strength grade is generally used. [0003] In the existing technology, in order to facilitate construction and reduce costs, the core area of ​​this type of concrete beam-column joint with unequal strength is poured with lower concrete of the same strength level as the beam-slab. Although this method reduces the stren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/21E04C5/06E04C5/07
CPCE04B1/21E04C5/0604E04C5/07
Inventor 钱增志周大兴侯立群方宏伟郭琨曹青张亚齐王庆彬孙玉龙
Owner CHINA RAILWAY CONSTR GROUP
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