Device and method for testing bond performance between reinforced bar and concrete under repeated load

A bonding performance and test device technology, which is applied in the direction of measuring device, testing material strength by applying repetitive force/pulsation force, and analyzing materials, can solve the problems of cumbersome loading operation process, increase test error, test error, etc., and achieve It is convenient for loading and unloading and test operation, improves the efficiency of disassembly and assembly, and improves the effect of adaptability

Pending Publication Date: 2018-11-27
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the device of this invention can be used to detect the bonding performance between the reinforcement and the concrete matrix under repeated loads, it has the following problems: First, it lacks a deflection correction mechanism. The second is that the thread loading method will cause the reinforcement to be torsion, which will further increase the

Method used

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  • Device and method for testing bond performance between reinforced bar and concrete under repeated load
  • Device and method for testing bond performance between reinforced bar and concrete under repeated load
  • Device and method for testing bond performance between reinforced bar and concrete under repeated load

Examples

Experimental program
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Effect test

Example Embodiment

[0044] Example 1:

[0045] The bonding performance test device of the lower reinforcement material and concrete under repeated loading of the present invention includes a loading frame 1 and a strain sensor mechanism 2; the loading frame 1 includes an upper loading plate 101, a lower loading plate 102, a screw 103, and a force transmission plate 104 , The ball hinge assembly 105 and the connecting rod 106, the four corners of the upper loading plate 101, the lower loading plate 102 and the force transmission plate 104 are provided with screw holes 15 and the screw rods 103 respectively pass through the screw holes 15 and pass through the wire The fastening nut 3 fitted on the rod 103 is connected to form an integral loading frame, and the screw 103 between the upper loading plate 101 and the lower loading plate 102 is sleeved with a spring 4 to support the upper loading plate 101. The center of the upper and lower loading plates 101, 102 is provided with a bar through hole 111 fo...

Example Embodiment

[0062] Example 2:

[0063] The same as in embodiment 1 will not be repeated, the difference is: the screw 103 between the upper loading plate 101 and the lower loading plate 102 is sleeved with a supporting nut 12 to support the upper loading plate 101, so A spring washer 8 is provided on the screw 103 between the supporting nut 12 and the upper loading plate 101.

Example Embodiment

[0064] Example 3:

[0065] The same as in embodiment 1 will not be repeated, the difference is that the center of the upper and lower loading plates 101, 102 is provided with a bar through hole 111 for the bar to pass through, and the upper loading plate 101 and the lower loading plate 102 No test piece mounting groove 7 is provided on the side of the board from the center to one side. When the test piece base 5 is installed, the upper loading plate 101 needs to be removed from the screw 103.

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Abstract

The invention relates to the technical field of construction engineering test and detection, in particular to a device and method for testing the bond performance between a reinforced bar and concreteunder repeated load. The device comprises a loading frame and a strain sensor mechanism; the loading frame comprises an upper loading plate and a lower loading plate, screw rods, a force transmissionplate, a ball joint assembly and a connecting rod, wherein the four corners of each one of the upper loading plate, lower loading plate and force transmitting plate are provided with screw rod holes,the screw rods penetrate through the screw rod holes respectively and are connected to form the integrated loading frame through fastening nuts cooperatively arranged on the screw rods, the strain sensor mechanism comprises a loading end deformation sensor mechanism, a free end deformation sensor mechanism and a test piece sensor mechanism. The device and method for testing the bond performance between the reinforced bar and the concrete under the repeated load have the advantages that the structure is simple, the installation and detachment of a test piece and the test operation are convenient, the precise control can be achieved, and accurate test data and results can be obtained through the loading control of a multi-function electro-hydraulic servo test machine and an existing data acquisition technology.

Description

technical field [0001] The invention relates to the technical field of construction engineering testing and detection, in particular to a device and method for testing the bonding performance of reinforcement and concrete under repeated loads. Background technique [0002] In the concrete structure, the good bonding performance between the reinforcement and concrete is the key to ensure the effective cooperation of the two different materials, the reinforcement and the concrete. The reinforcement is usually steel and fiber composite polymer reinforcement. Calculation, analysis of cracks, deformation and failure modes and other mechanical properties are of great significance, so they have long attracted the attention of scientific research and engineering technicians. A lot of research has been carried out on the bonding mechanism, failure mode, bond strength and slip performance and its influencing factors between reinforcement and concrete under unidirectional loads. In act...

Claims

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Application Information

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IPC IPC(8): G01N3/36
CPCG01N3/36G01N2203/0048G01N2203/0075
Inventor 高丹盈闫欢欢李庆斌汤寄予史科尤培波王志远娄仲雨
Owner ZHENGZHOU UNIV
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