CN105259107A - Device for testing bond performance of reinforcing steel bar and concrete through drawing and testing method - Google Patents

Device for testing bond performance of reinforcing steel bar and concrete through drawing and testing method Download PDF

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Publication number
CN105259107A
CN105259107A CN201510688835.5A CN201510688835A CN105259107A CN 105259107 A CN105259107 A CN 105259107A CN 201510688835 A CN201510688835 A CN 201510688835A CN 105259107 A CN105259107 A CN 105259107A
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CN
China
Prior art keywords
concrete
steel plate
reinforcing bar
analysing
notch
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Application number
CN201510688835.5A
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Chinese (zh)
Inventor
袁娇娇
侯新宇
张晓东
火映霞
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江苏城市职业学院
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Application filed by 江苏城市职业学院 filed Critical 江苏城市职业学院
Priority to CN201510688835.5A priority Critical patent/CN105259107A/en
Publication of CN105259107A publication Critical patent/CN105259107A/en

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Abstract

The invention discloses a device for testing bond performance of a reinforcing steel bar and concrete through drawing. The device comprises a loading frame, a concrete test sample, a T-shaped steel bracing wire, the reinforcing steel bar, a force sensor, a universal material testing machine, a displacement meter, a static signal test analysis system and a computer, wherein a PVC (polyvinyl chloride) pipe is arranged in the middle positions of the upper part and the lower part of the concrete test sample, the reinforcing steel bar penetrates through the PVC pipe, accordingly, the bonding-slip section of the poured test sample is only located in the middle of the concrete test sample, a T-shaped slide chute and a notch are reserved in steel plates at the upper part and the lower part of the loading frame, size scales are marked, and the loading device is accurately aligned by adjusting the positions of the reinforcing bar and the T-shaped steel bracing wire. The device is simple in structure and convenient to disassemble, few materials and instruments are required, and the device is applicable to scientific research and test of the bond performance of the reinforcing steel bar and the concrete on a construction site.

Description

A kind of drawing type measures device and the method for testing of reinforcing bar and Bond Performance Between Concrete

Technical field

The present invention relates to the device that a kind of drawing type measures reinforcing bar and Bond Performance Between Concrete, belong to concrete construction field.

Background technology

Adhesive property between reinforcing bar and concrete is reinforcing bar and the concrete bi-material composition cooperative basis of component, also be that reinforced concrete structure carries stressed prerequisite, this effect makes can realize Stress transmit between reinforcing bar and concrete, thus in reinforcing bar and concrete, set up the necessary working stress of structural bearing.The test unit that current shortage is unified, reinforcing bar and the direct pull-out test of concrete, need the problem solving test specimen centering.

Summary of the invention

Technical matters to be solved by this invention is for above-mentioned the deficiencies in the prior art, provides a kind of drawing type to measure the proving installation of reinforcing bar and Bond Performance Between Concrete.

For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of drawing type measures the device of reinforcing bar and Bond Performance Between Concrete, and this device comprises loading frame, concrete sample, T steel tie rod, reinforcing bar, force snesor, universal testing machine, displacement meter, stationary singnal detecting and analysing system and computing machine;

Described loading frame is made up of the high-strength bolt screw rod of top steel plate, lower steel plate and connection top steel plate and lower steel plate and high-strength bolt nut; Described top surface of steel plate is provided with T-shaped chute; The T connector of described T-steel tie rod is installed in described T-shaped chute, and the end of T-steel tie rod is connected with the fixture of universal testing machine one end; Described lower steel plate is provided with notch, the position of this notch and the position consistency of T-shaped chute; Described concrete sample is placed in described lower steel plate surface; One end of described reinforcing bar passes concrete sample and is connected with the fixture of the notch on lower steel plate with the universal testing machine other end, and this end fixture arranges force snesor; The other end of reinforcing bar also stretches out outside concrete, and this end installs displacement meter; Described displacement meter is connected with described stationary singnal detecting and analysing system by signal wire with force snesor, and this stationary singnal detecting and analysing system is connected with described computing machine.

Further, the upper end of described concrete sample and the centre position of bottom are provided with pvc pipe, and reinforcing bar is through described pvc pipe.

Further, described T-shaped chute and notch place are provided with size scale.

Present invention also offers the device adopting drawing type to measure reinforcing bar and Bond Performance Between Concrete and carry out method for measuring, specifically comprise the steps:

The first step: casting concrete test specimen: hole in the middle part of side form template, penetrated in die trial by reinforcing bar, and put pvc pipe, is arranged in two side form template ends by pvc pipe;

Second step: assembling loading frame: top steel plate and lower steel plate are coupled together by high-strength bolt screw rod and high-strength bolt nut, and tightens;

3rd step: assembling charger: reinforcing bar is penetrated the notch place that lower steel plate is reserved in advance, the position of transportable concrete test specimen, make it a corresponding scale, T steel tie rod is penetrated top steel plate, mobile T steel tie rod, make it identical in the corresponding scale value in lower steel plate place with reinforcing bar, make the accurate centering of concrete sample;

4th step: connecting test device: displacement meter, force snesor are connected with stationary singnal detecting and analysing system, stationary singnal detecting and analysing system connects computing machine;

5th step: open stationary singnal detecting and analysing system, zeroing, vertical load is applied by universal testing machine, load P (t) when relative displacement Δ S (t) of reinforcing bar destroys with test specimen in stationary singnal detecting and analysing system record loading procedure, can obtain load-displacement curve according to Δ S (t) and P (t).

Further, before test, to be coated with between concrete sample and lower steel plate and spread butter.

Beneficial effect of the present invention: the feature of proving installation of the present invention is that assembling is simple, easy to operate, and the required instrument of test is less, can measure at the scene of building.The present invention designs T-shaped chute and notch, and at T-shaped chute and the good scale of notch subscript, reinforcing bar and T steel bar is moved to same scale place, just can solve test specimen centering problem.Material required for the present invention and instrument few, be not only applicable to scientific research, and be applicable to working-yard research reinforcing bar and concrete between adhesive property.

Accompanying drawing explanation

Fig. 1 is the single unit system figure of proving installation of the present invention.

Fig. 2 is upper steel plate level perspective view of the present invention.

Fig. 3 is top of the present invention steel plate sectional drawing.

Fig. 4 is T steel tie rod figure of the present invention.

Fig. 5 is lower steel plate horizontal projection of the present invention.

Embodiment

Below in conjunction with accompanying drawing, technical scheme of the present invention is elaborated.

Be the device that a kind of drawing type of the present invention measures reinforcing bar and Bond Performance Between Concrete as Figure 1-5, this device comprises loading frame, concrete sample 5, reinforcing bar 6, T steel tie rod 7, force snesor 8, universal testing machine 9, displacement meter 11, stationary singnal detecting and analysing system 13 and computing machine 14.

Loading frame is by top steel plate 1, lower steel plate 2 and be connected the high-strength bolt screw rod 3 of top steel plate 1 and lower steel plate 2 and high-strength bolt nut 4 forms; Top steel plate 1 surface is provided with T-shaped chute 15; The T connector of T-steel tie rod 7 is installed in T-shaped chute 15, and the end of T-steel tie rod 7 is connected with the fixture of universal testing machine 9 one end; Lower steel plate 2 is provided with notch 16, the position of this notch 16 and the position consistency of T-shaped chute 15; Concrete sample 5 is placed in lower steel plate 2 surface; One end of reinforcing bar 6 passes concrete sample 5 and is connected with the fixture of the notch 16 on lower steel plate 2 with universal testing machine 9 other end, and this end fixture arranges force snesor 8; The other end of reinforcing bar 6 also stretches out outside concrete, and this end installs displacement meter 11; Displacement meter 11 is connected with stationary singnal detecting and analysing system 13 by signal wire 12 with force snesor 8, and this stationary singnal detecting and analysing system 13 is connected with computing machine 14.

In the present embodiment, the upper end of concrete sample 5 and the centre position of bottom are provided with pvc pipe 10, and reinforcing bar 6 is through pvc pipe 10.By the setting of pvc pipe, the test specimen bond-slip section after building only in the middle part of concrete sample, and ensures that bond-slip shear stress between the concrete and rebar surveyed as far as possible evenly.

In the present embodiment, T-shaped chute 15 and notch 16 place are provided with size scale (not shown in FIG.).The top and the bottom steel plate size specification of loading frame of the present invention is consistent, be respectively arranged with T-shaped chute 15 and notch 16, the position consistency of T-shaped chute 15 and notch 16, T-shaped chute 15 and notch 16 place have marked size scale, size scale is consistent, by regulating the position of reinforcing bar 6 and T steel tie rod 7, making reinforcing bar 6 and T-shaped tie rod 7 be in identical graduation place, making the accurate centering of charger.

The assay method adopting above-mentioned drawing type to measure the device of reinforcing bar and Bond Performance Between Concrete specifically comprises the steps:

The first step: casting concrete test specimen: hole in the middle part of side form template, penetrates reinforcing bar 6 in die trial, and puts pvc pipe 10, pvc pipe 10 is arranged in two side form template ends;

Second step: assembling loading frame: top steel plate 1 and lower steel plate 2 are coupled together by high-strength bolt screw rod 3 and high-strength bolt nut 4, and tightens;

3rd step: assembling charger: reinforcing bar 6 is penetrated notch 16 place that lower steel plate 2 is reserved in advance, the position of transportable concrete test specimen 5, make it a corresponding scale, T steel tie rod 7 is penetrated top steel plate 1, mobile T steel tie rod 7, make it identical in the corresponding scale value in lower steel plate 2 place with reinforcing bar 6, make concrete sample 5 precisely centering;

4th step: connecting test device: displacement meter 11, force snesor 8 are connected with stationary singnal detecting and analysing system 13, stationary singnal detecting and analysing system 13 connects computing machine 14;

5th step: open stationary singnal detecting and analysing system 13, zeroing, vertical load is applied by universal testing machine 9, stationary singnal detecting and analysing system 13 records load P (t) during relative displacement Δ S (t) and the test specimen destruction of reinforcing bar in loading procedure, can obtain load-displacement curve according to Δ S (t) and P (t).

Reinforcing bar is extracted by universal testing machine 9 at device, force snesor measures the bond bearing capacity between reinforcing bar 6 and concrete sample 5, to be coated with between concrete sample 5 and lower steel plate 2 before test and spread butter, to reduce to rub for the impact of test findings between concrete interface and lower steel plate 2.

More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (5)

1. drawing type measures a device for reinforcing bar and Bond Performance Between Concrete, it is characterized in that: this device comprises loading frame, concrete sample, T steel tie rod, reinforcing bar, force snesor, universal testing machine, displacement meter, stationary singnal detecting and analysing system and computing machine;
Described loading frame is made up of the high-strength bolt screw rod of top steel plate, lower steel plate and connection top steel plate and lower steel plate and high-strength bolt nut; Described top surface of steel plate is provided with T-shaped chute; The T connector of described T-steel tie rod is installed in described T-shaped chute, and the end of T-steel tie rod is connected with the jaw of universal testing machine one end; Described lower steel plate is provided with notch, the position of this notch and the position consistency of T-shaped chute; Described concrete sample is placed in described lower steel plate surface; One end of described reinforcing bar passes concrete sample and is connected with the jaw of the notch on lower steel plate with the universal testing machine other end, and this end jaw arranges force snesor; The other end of reinforcing bar also stretches out outside concrete, and this end installs displacement meter; Described displacement meter is connected with described stationary singnal detecting and analysing system by signal wire with force snesor, and this stationary singnal detecting and analysing system is connected with described computing machine.
2. a kind of drawing type according to claim 1 measures the device of reinforcing bar and Bond Performance Between Concrete, it is characterized in that: the upper end of described concrete sample and the centre position of bottom are provided with pvc pipe, and reinforcing bar is through described pvc pipe.
3. a kind of drawing type according to claim 1 measures the device of reinforcing bar and Bond Performance Between Concrete, it is characterized in that: described T-shaped chute and notch place are provided with size scale.
4. adopt drawing type according to claim 1 to measure an assay method for the device of reinforcing bar and Bond Performance Between Concrete, it is characterized in that: specifically comprise the steps:
The first step: casting concrete test specimen: hole in the middle part of side form template, penetrated in die trial by reinforcing bar, and put pvc pipe, is arranged in two side form template ends by pvc pipe;
Second step: assembling loading frame: top steel plate and lower steel plate are coupled together by high-strength bolt screw rod and high-strength bolt nut, and tightens;
3rd step: assembling charger: reinforcing bar is penetrated the notch place that lower steel plate is reserved in advance, the position of transportable concrete test specimen, make it a corresponding scale, T steel tie rod is penetrated top steel plate, mobile T steel tie rod, make it identical in the corresponding scale value in lower steel plate place with reinforcing bar, make the accurate centering of concrete sample;
4th step: connecting test device: displacement meter, force snesor are connected with stationary singnal detecting and analysing system, stationary singnal detecting and analysing system connects computing machine;
5th step: open stationary singnal detecting and analysing system, zeroing, vertical load is applied by universal testing machine, load P (t) when relative displacement Δ S (t) of reinforcing bar destroys with test specimen in stationary singnal detecting and analysing system record loading procedure, can obtain load-displacement curve according to Δ S (t) and P (t).
5. employing drawing type according to claim 4 measures the assay method of the device of reinforcing bar and Bond Performance Between Concrete, it is characterized in that: before test, will be coated with and spread butter between concrete sample and lower steel plate.
CN201510688835.5A 2015-10-21 2015-10-21 Device for testing bond performance of reinforcing steel bar and concrete through drawing and testing method CN105259107A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107817214A (en) * 2017-10-20 2018-03-20 扬州大学 A kind of basalt fibre and asphalt mastic interface binding intensity measure device and method of testing
CN109781619A (en) * 2019-03-05 2019-05-21 太原理工大学 A kind of fixture and detection method detecting fiber cement substrates adhesive property

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103234902A (en) * 2013-04-23 2013-08-07 金陵科技学院 Device and method for testing adhesive property between fiber reinforce plastic (FRP) rib and concrete under complicated stress state
CN203587484U (en) * 2013-11-19 2014-05-07 河海大学 Mechanical fixing device for measuring adhesive property between steel bar and concrete
CN103776767A (en) * 2014-01-24 2014-05-07 河海大学 Portable drawing-type testing device and drawing-type testing method for testing adhesive property steel bar and concrete
CN103954200A (en) * 2014-05-15 2014-07-30 沈阳建筑大学 Method of FRP reinforced concrete bond slip test

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103234902A (en) * 2013-04-23 2013-08-07 金陵科技学院 Device and method for testing adhesive property between fiber reinforce plastic (FRP) rib and concrete under complicated stress state
CN203587484U (en) * 2013-11-19 2014-05-07 河海大学 Mechanical fixing device for measuring adhesive property between steel bar and concrete
CN103776767A (en) * 2014-01-24 2014-05-07 河海大学 Portable drawing-type testing device and drawing-type testing method for testing adhesive property steel bar and concrete
CN103954200A (en) * 2014-05-15 2014-07-30 沈阳建筑大学 Method of FRP reinforced concrete bond slip test

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107817214A (en) * 2017-10-20 2018-03-20 扬州大学 A kind of basalt fibre and asphalt mastic interface binding intensity measure device and method of testing
CN109781619A (en) * 2019-03-05 2019-05-21 太原理工大学 A kind of fixture and detection method detecting fiber cement substrates adhesive property

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