Device and method for testing adhesive property between fiber reinforce plastic (FRP) rib and concrete under complicated stress state

A technology of stress state and testing device, which is applied in the direction of measuring device, mechanical device, instrument, etc., to achieve the effect of convenient operation and simple device

Active Publication Date: 2013-08-07
王亚军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to design a device capable of simulating the actual stress state in view of the fact that the existing test device can only perform FRP bars and concrete bondin

Method used

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  • Device and method for testing adhesive property between fiber reinforce plastic (FRP) rib and concrete under complicated stress state
  • Device and method for testing adhesive property between fiber reinforce plastic (FRP) rib and concrete under complicated stress state
  • Device and method for testing adhesive property between fiber reinforce plastic (FRP) rib and concrete under complicated stress state

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0048] Example one.

[0049] Such as Figure 1-12 Shown.

[0050] A test device for the bonding performance of FRP bars and concrete under complex stress conditions, which includes a vertical outward frame 1 ( Figure 7 ), vertical inner frame 2 ( figure 2 ) And horizontal frame 3 ( Figure 4 ), specimen 22 ( figure 1 ) The horizontal frame 3 is clamped and then clamped into the vertical inner frame 2, and the vertical inner frame 2 is clamped into the vertical outer frame 1. The FRP rib 23 of the test piece 22 passes through the top plate of the vertical outer frame 1. After that, it is connected to a tensile testing machine, and the bottom tie rod 7 at the lower end of the vertical outward frame 1 is also connected to the tensile testing machine. The test piece 22 and the bottom tie rod 7 have opposite force directions. The vertical outward frame 1 ( Figure 7 ) Including the top steel plate 4, the first vertical column steel rod 5, the first bottom steel plate 6 and th...

Example Embodiment

[0055] Example two.

[0056] A method for testing the bonding performance between FRP tendons and concrete under complex stress conditions is characterized in that it includes the preparation of test pieces, clamping and tensile tests.

[0057] The preparation method and steps of the test piece are:

[0058] First, prepare for the trial mold. Set a circular hole at the center of the front and rear side templates of the trial mold for passing through the FRP ribs, and set 4 circular holes on the four corners of the left and right side molds for the trial mold. Pass through 4 PVC pipes to form reserved holes after concrete pouring. The reserved holes are used to pass through the 4 horizontal steel rods 15 of the horizontal frame 3 to facilitate simultaneous installation of the vertical inner frame and the horizontal frame, such as figure 1 with Image 6 ;

[0059] Second, after fixing the FRP bars and PVC pipes in the side mold holes of the trial mold respectively, pour the conc...

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Abstract

The invention relates to a device and a method for testing the adhesive property between a fiber reinforce plastic (FRP) rib and concrete under a complicated stress state. The device is characterized by comprising a vertical outer frame (1), a vertical inner frame (2) and a transverse frame (3); after being clamped by the transverse frame (3), a test piece (22) is clamped in the vertical inner frame (2); the vertical inner frame (2) is then clamped in the vertical outer frame (1); the FRP rib (23) of the test piece (22) passes through a top plate of the vertical outer frame (1) and is then connected with a tensile testing machine; a bottom pull rod (7) arranged at the lower end of the vertical outer frame (1) is connected with the tensile testing machine; and the stress direction of the test piece (22) is opposite to that of the bottom pull rod (7). The device and the method are simple and practicable, and an ideal experimental device is provided for the pull-out test in the complicated stress state.

Description

technical field [0001] The invention relates to a technology for testing the stress of building components, in particular to a technology for testing the bond performance of FRP bars and concrete, specifically a method for bonding FRP bars and concrete under complex stress conditions that can simulate actual stress conditions Method and apparatus for performance pull-out test. Background technique [0002] Corrosion of steel bars is the main factor affecting the structural loss of bearing capacity and the expected service life, and it is also an important issue affecting the durability of reinforced concrete structures. FRP bars are made of continuous fiber (glass fiber, carbon fiber, aramid fiber, hybrid fiber) as reinforcement material, synthetic resin as matrix material, mixed with appropriate amount of auxiliary agent, and formed by pultrusion technology and necessary surface treatment. A new type of composite material. Compared with traditional steel bars, it has the ...

Claims

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Application Information

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IPC IPC(8): G01N19/04
Inventor 陈育志宣卫红陈晓洪
Owner 王亚军
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