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Large-span prestressed concrete assembly type frame connecting joint and construction method

A technology for connecting nodes and concrete, which is applied in the direction of climate change adaptation, protective buildings/shelters, building types, etc., and can solve the constraints of popularization and application, the inability to fully exert the effective control of prestressed tendons, and damage to self-resetting performance, etc. problems, to achieve the effect of improving compressive strength and ultimate compressive strain, good self-resetting ability, and reducing plastic deformation

Active Publication Date: 2021-07-16
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a linear arrangement of prestressed tendons cannot give full play to the effective control effect of prestressed tendons on beam cracks in long-span structures, and the use of traditional linear patterns in cast-in-place structures will lead to serious damage to self-resetting performance
It can be seen that there are obvious problems in the design and construction of the existing hybrid connection prefabricated joints, which have become a bottleneck restricting its popularization and application in long-span prefabricated frame structures

Method used

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  • Large-span prestressed concrete assembly type frame connecting joint and construction method
  • Large-span prestressed concrete assembly type frame connecting joint and construction method
  • Large-span prestressed concrete assembly type frame connecting joint and construction method

Examples

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Effect test

Embodiment 1

[0035] This embodiment discloses a large-span prestressed concrete assembled frame connection node, including prefabricated columns 1, prefabricated beams 2, prestressed tendons 4, beam mid-span reinforcements 5 and node connection area reinforcements 50.

[0036] The prefabricated column 1 is a precast concrete column. The prefabricated column 1 is reserved with a prestressed tendon channel I101 in the node area. The prefabricated column 1 is pre-embedded with upper and lower reinforcement tunnels I102 in the joint area. The upper and lower reinforcement tunnels I102 are respectively arranged on the upper and lower sides of the prestressing tendon tunnel I101.

[0037] The prefabricated beam 2 is a single-span prestressed concrete beam. The beam body of the prefabricated beam 2 is arranged with a prestressed tendon channel II 203 . The prefabricated beam 2 includes a beam body 201 and beam end joints 202 arranged at two ends of the beam body 201 . The beam main body 201 i...

Embodiment 2

[0043] see Figure 1 ~ Figure 3 , The main structure of this embodiment is the same as that of Embodiment 1, wherein, a column longitudinal reinforcement 103 is also arranged in the column body of the prefabricated column 1 . The steel bar 50 in the node connection area is connected with the steel bar 5 in the middle span of the corresponding beam using a steel bar sleeve 6 .

Embodiment 3

[0045] The main structure of this embodiment is the same as that of Embodiment 1, wherein the steel bar 50 in the node connection area and the steel bar 5 in the corresponding beam span are connected by welding.

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Abstract

The invention provides a large-span prestressed concrete fabricated frame connecting joint and a construction method. The connecting node comprises a prefabricated column, a prefabricated beam, a prestressed tendon, a beam midspan reinforcing steel bar and a node connecting area reinforcing steel bar, wherein a prestressed tendon hole channel I is reserved in the node area of the prefabricated column, an upper steel bar hole channel I and a lower steel bar hole channel I are pre-buried in the node area of the prefabricated column, the precast beam is a single-span prestressed concrete beam, a prestressed tendon hole channel II is formed in a beam body of the precast beam, the precast beam comprises a beam body and beam end joint parts arranged at the two ends of the beam body, and notches are formed in the beam top and the beam bottom of the two ends of the beam body. According to the large-span prestressed concrete fabricated frame connecting joint, the prestressed tendons are arranged at the center of the cross section at the beam end, so that large plastic deformation of the prestressed tendons caused by overlarge beam end bending moment increment under a large earthquake can be effectively reduced, and overlarge prestress loss is avoided; and the connecting joint is arranged at the beam bottom in the beam span, and generation and development of cracks in the beam span can be effectively controlled.

Description

technical field [0001] The invention relates to the technical field of building structures, in particular to a large-span prestressed concrete assembled frame connection node and a construction method. Background technique [0002] Prefabricated buildings are an important strategy for my country to promote supply-side structural reforms and new urbanization development, while railway stations, gymnasiums, airport terminals, convention and exhibition centers, teaching buildings, museums, libraries, etc. There is a wide demand for spanning prefabricated structures. [0003] Prestressed concrete structures have the advantages of small cross-sectional size, high rigidity, good crack resistance and durability, so they are widely used in long-span building structures. The effectiveness of connecting nodes is directly related to the overall stiffness, stability and bearing capacity of the prestressed concrete structure, and also affects the difficulty and progress of construction o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/20E04B1/21E04B1/22E04B1/98E04H9/02E04B1/41
CPCE04B1/20E04B1/21E04B1/22E04B1/215E04B1/98E04H9/021E04H9/025E04B1/4114Y02A30/30
Inventor 简斌吴盼彭欢
Owner CHONGQING UNIV
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