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FRP reinforcement and concrete bonding performance load-bearing and testing device and its application method

A bonding performance and testing device technology, which is applied in the direction of measuring devices, mechanical devices, instruments, etc., can solve the problems that it is difficult to ensure the axial tension of the reinforcement, and achieve the effect of simple structure, small space, and not easy to rust

Active Publication Date: 2022-06-14
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the FRP tendon and concrete bond performance sustaining test device is difficult to ensure the axial tension of the tendon due to the manual rotation of the nut, the invention provides a FRP tendon and concrete bond performance sustain load and test device and its use method

Method used

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  • FRP reinforcement and concrete bonding performance load-bearing and testing device and its application method
  • FRP reinforcement and concrete bonding performance load-bearing and testing device and its application method
  • FRP reinforcement and concrete bonding performance load-bearing and testing device and its application method

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Embodiment 1

[0035] The present invention is used as FRP bar and concrete bonding performance load-bearing test device, as figure 1As shown, it includes square steel plate 1, concrete cube test block 2, PVC pipe 3, FRP bar 4, steel washer 5, finish-rolled nut 6, prestressed finish-rolled threaded steel bar 7, bonding sleeve 8, connecting sleeve 9, Connecting rod 10, reinforced round steel pipe 11, rectangular stiffened steel plate 12, spherical hinge 13, strain gauge 14, resistance strain gauge 15, connecting wire 16. The end of the ball hinge is a variable-section steel plate with circular reserved holes at the four corners, and a groove is reserved in the middle of the variable-section steel plate for rotational contact with the ball hinge. In order to avoid becoming bulky due to the large thickness of the steel plate, the steel plate on the top is designed as a variable-section steel plate.

[0036] like figure 2 As shown, there are five reserved holes on the square steel plate 1, wh...

Embodiment 2

[0045] The present invention is used as FRP tendon and concrete bonding property testing device, as Image 6 As shown, on the basis of the load-bearing device, a newly added through-type drawing instrument 17, a displacement gauge 18, and two square steel plates in the middle, one of which is placed between the connecting sleeve 9 and the rectangular stiffener steel plate 12 The center-through drawing instrument 17 above the support is fixed below it with steel washers 5 and finish-rolled nuts 6, and another steel plate is arranged above the center-through drawing instrument 17 to withstand the rectangular stiffener steel plate 12; Described rectangular stiffener steel plate 12, is arranged in the square steel plate 1 below rectangle conveniently withstands; Described piercing type drawing instrument 17 is used for applying drawing force; Described displacement meter 18 is respectively arranged on piercing type drawing instrument 17 above the square steel plate 1 and the lower...

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Abstract

FRP reinforcement and concrete bond performance endurance and test device and its application method. The invention adopts the method of adding a spherical hinge at one end, so that the steel plates at the end are advanced in parallel to ensure that the axial center of the reinforcement is pulled. This device does not need to use a separate load sensor, and uses the method of attaching the resistance strain gauge to the connecting sleeve with internal thread and external light circle, so that it can also be used as a load sensor, which simplifies the test device and reduces the long-term load. The cost of sensors. The sleeve holding device is easy to operate and can effectively maintain the pulling force. The present invention combines the load-holding test and the bonding performance test into one, and does not need to use two devices to carry out the load-holding test and test on the bonding performance of the FRP bar and the concrete interface under the long-term action of the load. Based on the formation of the test device.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a load-holding and testing device for the bonding performance of FRP bars and concrete and a method for using the same. Background technique [0002] As a building material with excellent performance, steel bar is widely used in modern engineering structures. However, in recent years, the problems of corrosion and deterioration of reinforced concrete structures and steel structures have become increasingly serious, among which corrosion of steel bars is the most common. Corrosion of steel bars has a serious impact on the bearing capacity and applicability of the structure, not only affecting the normal use and life of the structure, but also causing a large number of safety and accident hazards, and the resulting maintenance and reinforcement costs are also quite expensive of. Aiming at the problem of corrosion of concrete structures, the current anti-corrosion meas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/04
CPCG01N19/04
Inventor 葛文杰王冠严卫华王仪高培琦仇胜伟曹大富陆伟刚
Owner YANGZHOU UNIV