Method for testing interface bond behavior of CFRP (carbon fiber reinforced polymer) cloth-concrete based on beam specimen

A technology of interface bonding and concrete test block, which is applied to measuring devices, instruments, and mechanical devices, etc., to achieve the effects of saving consumption, economical and convenient production, and improving accuracy and reliability.

Inactive Publication Date: 2013-10-09
ZHENGZHOU UNIV
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  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to provide a CFRP cloth-concrete interface bonding performance test method based on beam-type specimens, which solves the problems existing in the existing CFRP cloth-concrete interface bonding performance test method, and satisfies the requirements of truly reflecting the stressed form of FRP reinforced beams. requirements

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  • Method for testing interface bond behavior of CFRP (carbon fiber reinforced polymer) cloth-concrete based on beam specimen
  • Method for testing interface bond behavior of CFRP (carbon fiber reinforced polymer) cloth-concrete based on beam specimen
  • Method for testing interface bond behavior of CFRP (carbon fiber reinforced polymer) cloth-concrete based on beam specimen

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Embodiment Construction

[0054] The invention includes three steps: making test specimens, test loading, and arrangement of measuring points.

[0055] (1) Making test specimens

[0056] Such as Figure 3a , 3b As shown in , 3c, and 3d, the test specimen is a beam-type specimen, and the test specimen includes two concrete specimens, left concrete specimen 1 and right concrete specimen 2, left concrete specimen 1 and right concrete specimen 2 The cross-section is inverted T-shaped, and the bottom of the left concrete test block 1 and the right concrete test block 2 are pasted with a single layer or multiple layers of CFRP cloth. - Influence of concrete bond fatigue performance, which is also the test object of the present invention. A hinge joint 6 is provided between the left concrete test block 1 and the right concrete test block 2 . The various dimensions of the T-shaped section of the test block 2 are as follows: Figure 3b As shown in , the various dimension values ​​of the section T of the te...

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Abstract

The invention discloses a method for testing interface bond behavior of CFRP (carbon fiber reinforced polymer) cloth-concrete based on a beam specimen. The method comprises three steps of preparing a test specimen, arranging a test point and loading a test. The test specimen manufactured in the first step is the beam specimen and comprise two concrete test blocks, which are arranged at left and right and symmetric in shape; the two concrete test blocks are inverted T-shaped concrete test blocks; the upper parts in the middle of the two concrete test blocks are connected by a steel hinge; the steel hinge is divided into left and right halves; and the left and right halves are respectively adhered to the concrete test block at the corresponding side, and have the rotation ability. Compared with the traditional double shear test method for testing the interface bond behavior of the CFRP cloth-concrete, the effect of asymmetric loading on the data reliability is avoided; the method has a unique advantage of high accuracy of the test result; and the accuracy and the creditability of the detection result are improved.

Description

technical field [0001] The invention relates to the field of FRP sheet-concrete bonding performance testing methods, in particular to a CFRP cloth-concrete interface bonding performance testing method based on a beam-type test piece under the action of static load and fatigue load. Background technique [0002] FRP (Fiber reinforced polymer; fiber reinforced composite material) is widely used in the reinforcement of concrete structures due to its excellent performance, and the bonding performance of FRP-concrete interface is the key issue of FRP reinforced concrete technology. Such as Figure 1a As shown in -f, at present, there are three main types of test methods to study the interface performance of FRP-concrete: positive tension test [see reference 1 for details], in-plane shear test (single shear test, double shear test, push shear test) [ For details, see references 1 and 2] and beam test [see reference 3 for details]. Among them, such as Figure 1a As shown, the posi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04
Inventor 王新玲杨佳佳康现栋孙宏运张惠
Owner ZHENGZHOU UNIV
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