CN106248737A - The testing method of short column is reinforced for FRP - Google Patents
The testing method of short column is reinforced for FRP Download PDFInfo
- Publication number
- CN106248737A CN106248737A CN201610573532.3A CN201610573532A CN106248737A CN 106248737 A CN106248737 A CN 106248737A CN 201610573532 A CN201610573532 A CN 201610573532A CN 106248737 A CN106248737 A CN 106248737A
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- Prior art keywords
- short column
- frp
- girth
- concrete
- distance
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- 238000012360 testing method Methods 0.000 title claims abstract description 52
- 239000004567 concrete Substances 0.000 claims abstract description 19
- 239000011888 foil Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 8
- 230000002459 sustained effect Effects 0.000 claims abstract description 8
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 7
- 238000012423 maintenance Methods 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 25
- 239000011151 fibre-reinforced plastic Substances 0.000 description 25
- 230000000694 effects Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 230000003466 anti-cipated effect Effects 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011210 fiber-reinforced concrete Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Present invention provide for FRP and reinforce the testing method of short column, the method comprises the steps: that (1) makes FRP reinforced concrete stub column test test specimen: be pasted on concrete short column by FRP, the number of plies is 12 layers, the anchorage length of 1/2 girth is left in truncated position, after rolling uniformly with roller, maintenance 90 days under natural conditions；(2) test specimen is uniformly punched, positive and negative two electrodes are close to hole wall, mobile positive and negative two electrodes, utilize the detecting instrument being formulated with measuring wheel to carry out data record；Arranging resistance strain gage in surface of test piece equably, utilize multichannel strain-recording instrument to carry out data record, the distance between the foil gauge of sustained height is the 1/15 1/30 of short column girth, and the distance between the foil gauge of differing heights is the 1/15 1/30 of short column height；The integrity reinforcing short column of FRP is judged by the analysis of data.
Description
Technical field
The invention belongs to concrete NDT field, be particularly used for FRP and reinforce the testing method of short column.
Background technology
In engineering construction field, FRP (fibre reinforced polymer) concrete has more mixed than general because of it
Coagulate native higher bearing capacity ability and be widely used.But, the performance of the concrete that FRP reinforces not only takes
Certainly in concrete self, additionally depend on the covered effect of FRP and concrete.Particularly, when concrete body, there is defect or bag
When covering loosely, the effect of reinforcing then can be significantly less than expection, causes gained concrete quality not pass a test and the waste of material.At present
The simple and easy method of rarer complete detection FRP reinforced concrete short column.
Summary of the invention
For the shortcoming of prior art, it is an object of the invention to provide the testing method reinforcing short column for FRP, the party
Method can the exception on the surrounding concrete of quick diagnosis hole on the whole, can also judge that FRP reinforces the cladding of test specimen complete simultaneously
Property, to judge to reinforce the behavior pattern of test specimen.The method comprises the steps:
(1) FRP reinforced concrete stub column test test specimen is made: being pasted on concrete short column by FRP, the number of plies is 1-2 layer,
The anchorage length of 1/2 girth is left in truncated position, after rolling uniformly with roller, maintenance 90 days under natural conditions；
(2) test specimen is uniformly punched, positive and negative two electrodes are close to hole wall, mobile positive and negative two electrodes, utilize preparation
The detecting instrument having measuring wheel carries out data record；Surface of test piece is arranged resistance strain gage equably, utilizes multichannel to answer
Becoming monitor and carry out data record, the distance between the foil gauge of sustained height is the 1/15-1/30 of short column girth, differing heights
Foil gauge between the 1/15-1/30 that distance is short column height；Judge that FRP reinforces the integral reinforcing of short column by the analysis of data
Effect.
Generally, for the concrete NDT method that the many employings of detection method of FRP reinforcing short column are traditional, not by FRP
Covered effect take into account, it is difficult to obtain accurate testing result；Or detection method used is the most complicated, testing cost
Higher.The present invention passes through first with the detecting instrument being formulated with measuring wheel, and positive and negative two electrodes are close to hole wall, mobile positive and negative
Concrete is detected by two electrodes, and as during traveling electrode, testing result has concordance, then concrete zero defect, such as testing result
Occur fluctuating or abnormal, then existing defects between electrode.Said method is the most simple to operate, and precision is higher, can quickly judge
Defective locations.By the inventive method, short column is detected further by multichannel strain-recording instrument, can know that FRP is coated with
The integrity of effect.Said method can quickly judge the integrity situation of covered effect and the ground of cladding defect occurs
Side.While obtaining accurate testing result, this invention simplifies detection method, there is good application prospect.
Described short column is Concrete-filled Tubular Steel Stub Columns.
Preferably, in step (2), the distance between the foil gauge of sustained height is the 1/20 of short column girth, differing heights
Distance between foil gauge is the 1/20 of short column height.
Beneficial effects of the present invention:
The inventive method can the exception on the surrounding concrete of quick diagnosis hole on the whole, can also judge that FRP adds simultaneously
Gu the cladding integrity of test specimen, to judge to reinforce the behavior pattern of test specimen；The present invention is obtaining while accurate testing result,
This invention simplifies detection method, there is good application prospect.
Accompanying drawing explanation
Fig. 1 is the FPR test specimen after reinforcing.
Detailed description of the invention
Below by embodiment, the present invention is specifically described, it is necessary to it is pointed out here that be that following example are simply used
In the present invention is further detailed, it is impossible to be interpreted as limiting the scope of the invention, being skilled in technique of this field
Some nonessential improvement and adjustment that personnel are made according to foregoing invention content, still fall within protection scope of the present invention.
Loading scheme used in following embodiment is:
Test specimen is carried out on Sichuan University's Structural Engineering test chamber 500T hydraulic dynamometer.Load mode is hierarchical loading:
Elastic stage is loaded as the 1/10 of anticipated ultimate load every time；Yielding stage is loaded as the 1/15 of anticipated load every time, close to pole
When limit load carries, every grade is loaded as the 1/30 of anticipated load and persistently loads；Every grade keeps load 2min when loading, it is simple to observe examination
Test phenomenon and record.
Embodiment 1
(1) FRP reinforced concrete stub column test test specimen is made: being pasted on concrete short column by FRP, the number of plies is 2 layers,
The anchorage length of 1/2 girth is left in truncated position, and after rolling uniformly with roller, under natural conditions, maintenance 90 days, obtain as shown in Figure 1
Test specimen；
(2) test specimen is uniformly punched, positive and negative two electrodes are close to hole wall, mobile positive and negative two electrodes, utilize preparation
The detecting instrument having measuring wheel carries out data record；Surface of test piece is arranged resistance strain gage equably, utilizes multichannel to answer
Becoming monitor and carry out data record, the distance between the foil gauge of sustained height is the 1/20 of short column girth, the strain of differing heights
Distance between sheet is the 1/20 of short column height；Judge that FRP reinforces the integrity of short column by the analysis of data.
Embodiment 2
(1) FRP reinforced concrete stub column test test specimen is made: being pasted on concrete short column by FRP, the number of plies is 1 layer,
The anchorage length of 1/2 girth is left in truncated position, and after rolling uniformly with roller, under natural conditions, maintenance 90 days, obtain as shown in Figure 1
Test specimen；
(2) test specimen is uniformly punched, positive and negative two electrodes are close to hole wall, mobile positive and negative two electrodes, utilize preparation
The detecting instrument having measuring wheel carries out data record；Surface of test piece is arranged resistance strain gage equably, utilizes multichannel to answer
Becoming monitor and carry out data record, the distance between the foil gauge of sustained height is the 1/15 of short column girth, the strain of differing heights
Distance between sheet is the 1/15 of short column height；Judge that FRP reinforces the integrity of short column by the analysis of data.
Embodiment 3
(1) FRP reinforced concrete stub column test test specimen is made: being pasted on concrete short column by FRP, the number of plies is 1 layer,
The anchorage length of 1/2 girth is left in truncated position, and after rolling uniformly with roller, under natural conditions, maintenance 90 days, obtain as shown in Figure 1
Test specimen；
(2) test specimen is uniformly punched, positive and negative two electrodes are close to hole wall, mobile positive and negative two electrodes, utilize preparation
The detecting instrument having measuring wheel carries out data record；Surface of test piece is arranged resistance strain gage equably, utilizes multichannel to answer
Becoming monitor and carry out data record, the distance between the foil gauge of sustained height is the 1/30 of short column girth, the strain of differing heights
Distance between sheet is the 1/30 of short column height；Judge that FRP reinforces the integrity of short column by the analysis of data.
Above-described embodiment the most quickly obtains FPR and reinforces the testing result of test specimen.
Claims (3)
1. reinforce the testing method of short column for FRP, it is characterised in that described method comprises the steps:
(1) make FRP reinforced concrete stub column test test specimen: being pasted on concrete short column by FRP, the number of plies is 1-2 layer, cutting
Disconnected place leaves the anchorage length of 1/2 girth, after rolling uniformly with roller, and maintenance 90 days under natural conditions；
(2) test specimen is uniformly punched, positive and negative two electrodes are close to hole wall, mobile positive and negative two electrodes, utilize and be formulated with surveying
Detecting instrument away from wheel carries out data record；Surface of test piece is arranged resistance strain gage equably, utilizes multichannel strain note
Record instrument carries out data record, and the distance between the foil gauge of sustained height is the 1/15-1/30 of short column girth, the strain of differing heights
Distance between sheet is the 1/15-1/30 of short column height；Judged that by the analysis of data the integral reinforcing reinforcing short column of FRP is imitated
Really.
Testing method the most according to claim 1, it is characterised in that described short column is Concrete-filled Tubular Steel Stub Columns.
Testing method the most according to claim 1, it is characterised in that in step (2), between the foil gauge of sustained height away from
From for the 1/20 of short column girth, the distance between the foil gauge of differing heights is the 1/20 of short column height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610573532.3A CN106248737A (en) | 2016-07-19 | 2016-07-19 | The testing method of short column is reinforced for FRP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610573532.3A CN106248737A (en) | 2016-07-19 | 2016-07-19 | The testing method of short column is reinforced for FRP |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106248737A true CN106248737A (en) | 2016-12-21 |
Family
ID=57613809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610573532.3A Pending CN106248737A (en) | 2016-07-19 | 2016-07-19 | The testing method of short column is reinforced for FRP |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106248737A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988117A (en) * | 2019-10-21 | 2020-04-10 | 武汉大学 | Test method for calibrating active restraining force and ultrasonic wave of FRP (fiber reinforced Plastic) reinforced concrete column |
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| CN102507432A (en) * | 2011-09-29 | 2012-06-20 | 成都发动机（集团）有限公司 | Nondestructive inspection method for turbine disc of aero-turbine engine |
| CN102854302A (en) * | 2012-08-24 | 2013-01-02 | 河海大学 | Testing device and method for real-time measurement of cracking time and crack width of concrete at early age |
| CN103195255A (en) * | 2013-03-29 | 2013-07-10 | 华北水利水电学院 | Construction method for prestressed carbon-fiber reinforced plastic (CFRP) reinforced concrete beam |
| CN103344560A (en) * | 2013-07-19 | 2013-10-09 | 郑州大学 | Method for testing interface bond behavior of CFRP (carbon fiber reinforced polymer) cloth-concrete based on beam specimen |
| CN103776766A (en) * | 2014-01-24 | 2014-05-07 | 河海大学 | Method for testing surface adhesive property of basalt fibre cloth and concrete |
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-
2016
- 2016-07-19 CN CN201610573532.3A patent/CN106248737A/en active Pending
Patent Citations (8)
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| CN201561826U (en) * | 2009-10-30 | 2010-08-25 | 中国石油天然气股份有限公司 | High risk area pipeline body stress monitoring system based on meet an emergency |
| CN102220768A (en) * | 2010-04-19 | 2011-10-19 | 广东省建筑科学研究院 | Method for detecting integrity of concrete foundation pile body |
| CN102507432A (en) * | 2011-09-29 | 2012-06-20 | 成都发动机（集团）有限公司 | Nondestructive inspection method for turbine disc of aero-turbine engine |
| CN102854302A (en) * | 2012-08-24 | 2013-01-02 | 河海大学 | Testing device and method for real-time measurement of cracking time and crack width of concrete at early age |
| CN103195255A (en) * | 2013-03-29 | 2013-07-10 | 华北水利水电学院 | Construction method for prestressed carbon-fiber reinforced plastic (CFRP) reinforced concrete beam |
| CN103344560A (en) * | 2013-07-19 | 2013-10-09 | 郑州大学 | Method for testing interface bond behavior of CFRP (carbon fiber reinforced polymer) cloth-concrete based on beam specimen |
| CN103776766A (en) * | 2014-01-24 | 2014-05-07 | 河海大学 | Method for testing surface adhesive property of basalt fibre cloth and concrete |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988117A (en) * | 2019-10-21 | 2020-04-10 | 武汉大学 | Test method for calibrating active restraining force and ultrasonic wave of FRP (fiber reinforced Plastic) reinforced concrete column |
| CN110988117B (en) * | 2019-10-21 | 2020-10-13 | 武汉大学 | Test method for calibrating active restraining force and ultrasonic wave of FRP (fiber reinforced Plastic) reinforced concrete column |
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Application publication date: 20161221 |
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