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Frame beam composite reinforcing method by transversely tensioning prestress carbon fiber cloth and steel

A carbon fiber cloth, transverse tensioning technology, applied in the direction of building maintenance, construction, building construction, etc., can solve the problems of reducing the efficiency of tensioning construction, complex composition of prestressed tensioning system, etc., to achieve multi-effect utilization, improve anchorage Reliability, clever and rational use

Active Publication Date: 2014-07-09
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are a variety of prestressing methods for longitudinally stretching carbon fiber sheets, and their common feature is that they need to apply longitudinal tension to the carbon fiber sheet, which not only requires the end of the carbon fiber sheet (including the tension end and the The reliable anchoring of the fixed end) also needs to provide a longitudinal reaction device to support the tension force for the tension construction, which makes the composition of the entire prestressed tension system complex and reduces the efficiency of the tension construction

Method used

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  • Frame beam composite reinforcing method by transversely tensioning prestress carbon fiber cloth and steel
  • Frame beam composite reinforcing method by transversely tensioning prestress carbon fiber cloth and steel
  • Frame beam composite reinforcing method by transversely tensioning prestress carbon fiber cloth and steel

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Embodiment 1

[0036] Embodiment one: if figure 1 , figure 2 and image 3 As shown, the method for compositely strengthening frame beams of transversely tensioned prestressed carbon fiber cloth and steel of the present invention comprises the following specific steps:

[0037] (A) Paste and fix both ends of the carbon fiber sheet 1 to the L-shaped steel anchor plate 2 , and then install and fix the L-shaped steel anchor plate 2 to the angle between the lower surface of the frame beam 20 and the inner surface of the frame column 30 .

[0038] (B) Pull the carbon fiber sheet 1 horizontally downwards, insert at least two steel backing plates 3 between the upper surface of the carbon fiber sheet 1 and the lower surface of the frame beam 20, and bond and fix the upper surface of the steel backing plate 3 on the lower surface of the frame beam 20;

[0039] (C), symmetrically arrange a U-shaped steel plate 4 with the opening facing up on both sides of each steel backing plate 3, and pull the U-...

Embodiment 2

[0058] Embodiment two: if Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the upper part of the frame beam 20 is provided with a floor slab 40, which requires drilling holes on the bottom of the floor slab 40 on both sides of the frame beam 20 to pre-embed the second fastening bolt 10, The second fastening bolt 10 is connected with the U-shaped steel plate 4 to tension the carbon fiber sheet 1 .

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Abstract

The invention relates to a frame beam composite reinforcing method by transversely tensioning prestress carbon fiber cloth and steel. The method includes: adhering and fixing two ends of a carbon fiber sheet to an L-shaped steel anchor plate, and mounting the anchor plate with the carbon fiber sheet to two ends of a frame beam; transversely downwardly tensioning the carbon fiber sheet, filling in a steel base plate, and adhering and fixing the steel base plate on the frame beam; using a U-shaped steel plate for synchronously, symmetrically, transversely and upwardly tensioning the carbon fiber sheet for once or multiple times, and fixing the U-shaped steel plate on the frame beam after the carbon fiber sheet is closes attached to the bottom of the frame beam; adhering a steal plate at the bottom of the beam with U-shaped steel hoops in sections at two ends, and anchoring through chemical anchor bolts. By the method, reliable tensioning anchoring and zero-gap adhering can be achieved easily, the high strength performance of the carbon fiber sheet is utilized to apply high-level prestress to the frame beam, the anti-shear bearing capacity of the frame beam is increased by comprehensively using a tensioning anchoring steel plate, the performances of the carbon fiber sheet and steel are brought into full play, and anti-bending and anti-shear bearing force synergetic reinforcement of the frame beam is achieved.

Description

technical field [0001] The invention belongs to the technical field of civil engineering structure reinforcement, and in particular relates to a method for compositely reinforcing frame beams by transverse tensioning prestressed carbon fiber cloth and steel. Background technique [0002] In recent years, attention has been paid to the technology of prestressing the structure with carbon fiber sheets, and a unique prestressed carbon fiber sheet reinforcement technology has been formed. The advantage of this technology is to give full play to the high-strength performance of carbon fiber sheets, and at the same time apply active prestress to the structure to improve the reinforcement effect; change the stress state of passive load after direct pasting, so that the effective utilization rate of materials is significantly improved; for beams For structural members, it can significantly improve the cracking moment, delay the appearance of cracks, inhibit the development of existi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/02
Inventor 李晓克李长永赵顺波裴松伟杨亚彬
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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