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FRP rib compression load holding and testing device and operation method thereof

A technology for testing devices and steel bars, which is applied in the direction of measuring devices, using stable tension/pressure testing material strength, instruments, etc., can solve the problems of few studies on the durability of FRP bars, achieve simple structure, reduce space, Simple operation effect

Pending Publication Date: 2020-09-25
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the relevant research on the durability of FRP bars is to directly test the mechanical properties of the bars after being placed in the erosive environment for a period of time. not much research

Method used

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  • FRP rib compression load holding and testing device and operation method thereof
  • FRP rib compression load holding and testing device and operation method thereof
  • FRP rib compression load holding and testing device and operation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 As shown, the present invention is used as a pressure-bearing device for FRP bars, including FRP bars 1, bonded sleeves 2, square steel plates 3 (including left steel plates, middle steel plates, and right steel plates), circular sleeves 4, and prestressed steel plates. Finished threaded steel bars 5, steel washers 6, finished nuts 7, strain gauges 8, resistance strain gauges 9, and connecting wires 10. There are two bonding sleeves 2, which are respectively fixed on the two ends of the FRP tendon 1 by potting glue.

[0030] like figure 2 As shown, the square steel plate 3 has three pieces, which are respectively arranged at both ends of the device and between the bonding sleeve 2 and the round sleeve 4, and four circular reserved holes are arranged at the four corners of the steel plate; the inside and outside of the round sleeve 4 The uniform light circle is arranged between the left and middle square steel plates 3, and is used as a load sensor by pa...

Embodiment 2

[0037] like Figure 5As shown, the FRP bar compression performance test device includes FRP bar 1, bonding sleeve 2, square steel plate 3, round sleeve 4, prestressed finish-rolled threaded steel bar 5, steel washer 6, finish-rolled nut 7, and strain gauges 8. Resistance strain gauge 9, connecting wire 10, puller 11. Take out the load-bearing device in the erosive environment simulation device, and add a square steel plate 3 and a puller 11 on the basis of the load-bearing device. The square steel plate 3 adds a new one, is arranged on the leftmost side of the device, and its left side is fixed with a steel washer 6 and a finishing nut 7; the drawing instrument 11 is arranged in the middle of the two leftmost square steel plates 3, Used to apply pressure.

[0038] The device for testing the compressive performance of FRP tendons is loaded by a puller 11 during the test, and the puller 11 pushes the square steel plate 3 on the right side to apply a force to the right, and the...

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Abstract

The invention relates to an FRP rib compression load holding and testing device and an operation method thereof. Three steel plates are arranged in parallel, and four prestress finish rolling twistedsteel bars sequentially penetrate through the three steel plates; an FRP rib with two bonding sleeves is clamped and fixed between the middle steel plate and the right side steel plate, a round sleeveis clamped and fixed between the middle steel plate and the left side steel plate, and the outer side ends of the left side steel plate and the right side steel plate are respectively provided with afinish rolling nut used for being connected with the corresponding prestress finish rolling twisted steel bar in a screwed mode. A strain gauge is attached to the outer surface of the round sleeve and is connected with a resistance strain gauge through a connecting wire, so a pressed load holding test can be completed. For the FRP rib compression testing device, a square steel plate and a drawinginstrument are additionally arranged on the basis of a load holding device. The test device is simplified, and the cost problem that a large number of load sensors need to be occupied for long-term load holding is solved.

Description

technical field [0001] The invention belongs to the technical field of civil engineering testing, and in particular relates to an FRP tendon under compression and bearing load, a testing device and an operation method thereof. Background technique [0002] Fiber-reinforced composites (FRP) have many advantages such as light weight, high strength, fatigue resistance, corrosion resistance, designability and easy processing, and can replace steel-reinforced concrete structures. [0003] FRP is a new type of composite material prepared by continuous fiber as reinforcement, polymer resin as matrix, and prepared through processes such as infiltration and curing. FRP consists of three parts: continuous fiber, resin matrix and fiber / resin interface. Among them, the continuous fibers are evenly dispersed in the resin matrix, and the force is exerted synergistically through the connection of the resin matrix. The pultrusion molding process of FRP tendons is that under the pulling fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/02
CPCG01N3/08G01N3/02G01N2203/0003G01N2203/0019G01N2203/024G01N2203/0252G01N2203/0676
Inventor 葛文杰王彦铭王仪严卫华宋婉蓉高培琦陆伟刚曹大富
Owner YANGZHOU UNIV
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