Reinforcement Method of Frame Beam Transversely Tensioned and Prestressed Carbon Fiber Sheets

A carbon fiber sheet and transverse tensioning technology, which is applied in building maintenance, construction, building construction, etc., can solve the problems of complex composition of the prestressed tensioning system and reduce the efficiency of tensioning construction, so as to realize multi-effect utilization and improve Anchorage reliability, ingenious and reasonable effect

Active Publication Date: 2016-01-13
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Application Information

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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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  • Reinforcement Method of Frame Beam Transversely Tensioned and Prestressed Carbon Fiber Sheets
  • Reinforcement Method of Frame Beam Transversely Tensioned and Prestressed Carbon Fiber Sheets
  • Reinforcement Method of Frame Beam Transversely Tensioned and Prestressed Carbon Fiber Sheets

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Embodiment 1

[0037] Embodiment one: if Figure 1-Figure 8 As shown, the frame beam transverse tension prestressed carbon fiber sheet reinforcement method of the present invention comprises the following specific steps:

[0038] A. Paste and fix the two 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 side of the frame column 30;

[0039] B. Tighten 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 to the frame on the lower surface of the beam 20;

[0040] C. A U-shaped steel plate 4 with an upward opening is arranged symmetrically on both sides of each steel backing plate 3. Mounting holes 50 are provided at both ends of the U-shaped st...

Embodiment 2

[0056] Embodiment two: if Figure 9 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

Disclosed is a lateral tension prestressing carbon fiber sheet reinforcing method for a frame beam. The method mainly includes the specific steps: fixing two ends of a carbon fiber sheet on L-shaped steel anchor plates by sticking, then mounting the L-shaped steel anchor plates at two ends of the frame beam; tensioning the carbon fiber sheet laterally downwardly, stuffing in at least two steel shims between the bottom of the frame beam and the carbon filter sheet, and fixing the steel shims on the frame beam by sticking; tensioning the carbon fiber sheet upwards symmetrically and laterally for one or more times through U-shaped steel plates, and after the carbon fiber sheet clings to the bottom surface of the frame beam, fixing U-shaped steel hoops on the frame beam. The method is unique and novel in design and simple and rapid, the carbon fiber sheet is easily and reliably tensioned and anchored and stuck with the to-be-reinforced frame beam in a zero clearance manner, high strength of the carbon fiber sheet can be well utilized to apply high-level prestress to the frame beam, and the purpose of effective strengthening and reinforcement is achieved; meanwhile, tensioning force is reduced remarkably, tension construction is simple and reliable, and hydraulic tension equipment and support devices thereof are saved.

Description

technical field [0001] The invention belongs to the technical field of civil engineering structure reinforcement, and in particular relates to a method for reinforcing a frame beam with a transversely tensioned prestressed carbon fiber sheet. 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 existing cracks, and s...

Claims

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Application Information

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Patent Type & Authority Patents(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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