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Anchorage performance detection testing apparatus and method for carbon fiber adhesion reinforcement

An anchoring performance and test device technology, applied in the direction of measuring devices, mechanical devices, instruments, etc., can solve the problems that carbon fiber reinforced beams cannot accurately exert the reinforcement effect, failure of the anchorage area of ​​carbon fiber reinforced beams, and structural damage of carbon fiber reinforced beams. Achieve the effects of reducing the length of the cantilever, facilitating processing and manufacturing, and reducing the internal force of the bending moment

Inactive Publication Date: 2013-04-17
江苏华通工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] When pasting multi-layer carbon fiber cloth or carbon fiber plate to strengthen reinforced concrete beams, if no reasonable additional auxiliary anchorage measures are taken, due to the excessive shear stress at the crack, the carbon fiber sheet and the concrete base may be prematurely peeled off and damaged. Once the carbon fiber The shearing and peeling failure of the carbon fiber bonded interface at the oblique crack in the anchorage area of ​​the reinforced beam will lead to the failure of the anchorage area of ​​the carbon fiber reinforced beam, and the structure of the carbon fiber reinforced beam will be destroyed in advance. Reinforcement effect

Method used

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  • Anchorage performance detection testing apparatus and method for carbon fiber adhesion reinforcement
  • Anchorage performance detection testing apparatus and method for carbon fiber adhesion reinforcement
  • Anchorage performance detection testing apparatus and method for carbon fiber adhesion reinforcement

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Embodiment 1

[0044] The anchoring performance testing device for carbon fiber paste reinforcement of the present invention consists of a reinforced concrete test bench 1, a reinforced concrete cuboid test piece 2, a carbon fiber sheet test piece 3, an auxiliary anchor 4, a test fixture 5, a connecting screw rod 6, and a tension connection Steel plate 7, tension screw rod 8, through-hole jack and sensor 9 are formed. Reinforced concrete cuboid specimen 2 is placed on the top surface of reinforced concrete test bench 1, and is tightly connected to the block of reinforced concrete test bench 1. Carbon fiber sheet test specimen 3 is pasted on the upper surface of reinforced concrete cuboid specimen 2, and the auxiliary anchor 4 Compress the carbon fiber sheet test piece 3, the tail of the carbon fiber sheet test piece 3 is clamped by the test fixture 5, and four connecting screws 6 are welded on the surface of the outer cover steel plate of the test fixture 5, and the test fixture 5 is connecte...

Embodiment 2

[0049] The above-mentioned anchoring performance testing device for carbon fiber paste reinforcement is used for testing, including the following steps:

[0050] Step 1) Make a plurality of reinforced concrete cuboid specimens 2, stick the carbon fiber sheet test piece 3 on the upper surface of the reinforced concrete cuboid specimen 2 with impregnated structural glue, use the auxiliary anchor 4 to compress the carbon fiber sheet test piece 3, and wait After the impregnated structure is hardened, transport the test specimen to the structure test center;

[0051] Step 2) Place the above-mentioned test specimen on the top surface of the reinforced concrete test bench 1, and tighten it with the stopper of the reinforced concrete test bench 1, and clamp the tail of the carbon fiber sheet test specimen 3 with the test fixture 5, pass The connecting screw 6 connects the test fixture 5 with the tension connecting steel plate 7, and installs the tension screw 8, the through-type jack ...

Embodiment 3

[0054]An anchoring performance test device for carbon fiber reinforcement is made to verify the rationality of the carbon fiber reinforcement anchoring scheme and to detect the construction quality of carbon fiber reinforcement. The plane size of the base of the reinforced concrete test bench is 900×3900mm, and the thickness is 500mm. On the base, a stopper, a connecting stand and a tensioning stand are arranged in sequence. 200mm, the section size of the tensioning table is 450×600mm, a φ40mm reserved hole is set in the middle of the tensioning table, and the thickness of the embedded iron plate on the right side of the tensioning table is 12mm. The size of the reinforced concrete cuboid specimen is 300×300×1200mm, with 4φ12 longitudinal steel bars and φ6200 stirrups inside. The carbon fiber sheet pasting method and auxiliary anchor setting method are divided into three groups, and the width of each carbon fiber sheet is 100mm. Group a: paste two layers of 0.168mm thick carbo...

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Abstract

The invention discloses an anchorage performance detection testing apparatus for carbon fiber adhesion reinforcement. The testing apparatus comprises a testing bench, a concrete test piece, a test fixture and a loading system. The reinforced concrete test bench is composed of a base, a blocking bed, a connecting bed and a stretching bed, carbon fiber sheets are adhered to the test piece, and a steel pressing plate and an anchor bolt are taken as auxiliary anchoring pieces; the test fixture is composed of an external covering steel plate, two inner clamping steel plates and a high-strength split bolt, strip-shaped steel teeth are formed on the surface of the external covering steel plate, pole steel teeth are formed on the surfaces of the inner clamping steel plates, the carbon fiber sheets are placed between the two inner clamping steel plates, the carbon fiber sheets and the two inner clamping steel plates are firmly adhered together by dipping glue, and the high-strength split bolt clamps the external covering steel plate, the inner clamping steel plates and the carbon fiber sheets; and the loading system is composed of a connecting screw rod, a tensile connecting steel plate, a tensile screw rod, a lifting jack and a sensor. The testing apparatus provided by the invention can quickly carry out an anchorage zone stress performance test on a concrete beam reinforced with adhesion of the carbon fiber sheets, and has the advantages of being convenient to make and simple to operate, and the like.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a detection technology for carbon fiber paste reinforcement, in particular to an anchoring performance detection test device for carbon fiber paste reinforcement. Background technique [0002] Carbon fiber materials have excellent properties such as light weight, high strength, and corrosion resistance. In recent years, carbon fiber materials, as an emerging reinforcement material, have been widely used in the field of civil engineering structure reinforcement. Carbon fiber reinforced and repaired structure technology is another new type of structural reinforcement technology after increasing the concrete section and bonding steel reinforcement. It has many advantages such as high reinforcement bearing capacity and convenient construction. It has been widely used in building construction and bridge structure reinforcement projects. In the project, extremely significant economic and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04
Inventor 夏叶飞孙大松袁微微张红雷王继林王为圣张贻能颜巍徐文平
Owner 江苏华通工程技术有限公司
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