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Construction method for strengthening reinforced concrete pier column by using prestressed fiber fabrics

A reinforced concrete and construction method technology, which is applied in bridge reinforcement, bridge maintenance, erection/assembly of bridges, etc., can solve problems such as rapid loss of prestress, poor anchoring effect, and unsatisfactory tension effect, and achieve prestress Small loss, good reinforcement effect and simple structure

Pending Publication Date: 2018-09-04
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the tension anchor devices for reinforced concrete piers with prestressed fiber cloth have problems such as poor anchoring effect and rapid loss of prestress, which makes the tension effect less than expected; The construction method that can effectively anchor and maintain its prestress is the key issue in popularizing the application of prestressed FRP cloth reinforcement technology

Method used

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  • Construction method for strengthening reinforced concrete pier column by using prestressed fiber fabrics
  • Construction method for strengthening reinforced concrete pier column by using prestressed fiber fabrics
  • Construction method for strengthening reinforced concrete pier column by using prestressed fiber fabrics

Examples

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Effect test

Embodiment 1

[0027] Such as figure 1 , 2 , Shown in 6, 7 and 8, the present embodiment takes reinforced concrete square column 5 as reinforcement object, and the width of fiber cloth 4 is 150mm. A construction method for reinforcing reinforced concrete pier columns with prestressed fiber cloth, the specific steps are:

[0028] (1) A prestressed fiber cloth reinforcement device is provided, including two sleeves 1, two wedges 2, two screws 3 and fiber cloth 4; wherein the sleeves 1, wedges 2 and screws 3 are made of steel , all adopt high-quality steel of Q235B grade and above; the sleeve plate 1 is composed of the sleeve anchor head 11 and the sleeve body 12 at both ends of the sleeve plate 1, and the center of the sleeve anchor head 11 at both ends of the sleeve plate 1 is opened parallel to the wrapping direction of the fiber cloth 4. A screw hole 111; a wedge groove 121 is opened in the sleeve body 12. The two ends of the wedge 2 along the wrapping direction of the fiber cloth 4 are ...

Embodiment 2

[0036] Such as image 3 , 4 , 5, 6, 7, 8 and 9, the present embodiment takes the reinforced concrete column 6 as the reinforcement object, and the width of the fiber cloth 4 is 150mm. A construction method for reinforcing reinforced concrete pier columns with prestressed fiber cloth, the specific steps are:

[0037] (1) A prestressed fiber cloth reinforcement device is provided, including two sleeves 1, two wedges 2, two screws 3 and fiber cloth 4; wherein the sleeves 1, wedges 2 and screws 3 are made of steel , all adopt high-quality steel of Q235B grade and above; the sleeve plate 1 is composed of the sleeve anchor head 11 and the sleeve body 12 at both ends of the sleeve plate 1, and the center of the sleeve anchor head 11 at both ends of the sleeve plate 1 is opened parallel to the wrapping direction of the fiber cloth 4. A screw hole 111; a wedge groove 121 is opened in the sleeve body 12. The two ends of the wedge 2 along the wrapping direction of the fiber cloth 4 ar...

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Abstract

The invention discloses a construction method for strengthening a reinforced concrete pier column by using prestressed fiber fabrics. A prestressed fiber fabric strengthening device is arranged. The prestressed fiber fabric strengthening device comprises two jacket plates, two wedge sheets, two threaded rods and fiber fabrics; the fiber fabrics are wound on the wedge sheets for two circles; the wedge sheets wound with the fiber fabrics are inserted into wedge sheet grooves in bodies of the jacket plates; the fiber fabrics are wound on the jacket plates for two circles; and the other ends of the fiber fabrics are treated by using the same mode. The fiber fabrics connected with the jacket plates and the wedge sheets surround the strengthened reinforced concrete pier column for one circle. Threaded rod holes in jacket plate anchoring heads at the upper and lower ends of the two jacket plates are aligned with each other; the two threaded rods penetrate into the threaded rod holes in the jacket plate anchoring heads; and the two threaded rods are synchronously tightened to apply prestress to the fiber fabrics so as to finish reinforcing construction to the reinforced concrete pier column. The prestressed fiber fabric strengthening device used by the construction method for strengthening the reinforced concrete pier column by using the prestressed fiber fabrics has the advantages ofsimple structure, convenient construction method operation and high implementing efficiency.

Description

technical field [0001] The invention belongs to the field of structural reinforcement such as bridge engineering and construction engineering, and particularly relates to a construction method for reinforcing reinforced concrete piers with prestressed fiber cloth. Background technique [0002] Prestressed fiber reinforced plastics (Fiber Reinforced Plastics, referred to as FRP) reinforced concrete structure technology has obvious strengthening effects and broad application prospects, and has been more and more widely used in the world. Different from the ordinary external reinforcement method, the prestressed FRP reinforcement technology is an active reinforcement method, which provides lateral restraint force on the pier column by applying prestress, so that the concrete is in a three-dimensional compression state, thereby improving the ultimate bearing capacity of the concrete At the same time, it can avoid the stress hysteresis effect of FRP materials, give full play to t...

Claims

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Application Information

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IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 卢春玲王强王鹏
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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