CN201697604U - Integrated strain gauge for concrete - Google Patents
Integrated strain gauge for concrete Download PDFInfo
- Publication number
- CN201697604U CN201697604U CN2010202178858U CN201020217885U CN201697604U CN 201697604 U CN201697604 U CN 201697604U CN 2010202178858 U CN2010202178858 U CN 2010202178858U CN 201020217885 U CN201020217885 U CN 201020217885U CN 201697604 U CN201697604 U CN 201697604U
- Authority
- CN
- China
- Prior art keywords
- strain gauge
- line
- concrete
- energy
- strain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model discloses a special strain gauge for stress test of concrete structure, which is characterized in that a reinforced fiber substrate with low elastic modulus is adopted, and an anchor end is added to the strain gauge substrate by utilizing a stiffened metal thin foil and stiffened metal thin wires, which enables the strain gauge to be more suitable for the stress test of the heterogeneous concrete, micro-crack-born concrete, even the cracked concrete; on the basis that the fiber substrate is reinforced, a glue permeable slot and a shear connector are formed by utilizing the stiffened metal thin wires to ensure the bonding force and shearing resistance of the strain gauge; the one-foil-three-wire connection is adopted to automatically compensate the influence caused by the temperature difference electric resistance of conducting wires; soft watertight material is adopted to perform watertight sealing treatment on the whole, and an integrated strain gauge is designed, and in addition, the special strain gauge has the advantages of convenient, quick and safe on-site mounting on the basis that technical requirements as the insulation resistance are met.
Description
Affiliated technical field
The utility model relates to a kind of strain ga(u)ge, is a kind of strainometer of concrete special use.
Background technology
In theory the stress-strain test of structure with the precision of resistor straining testing for the highest, but engineering structure site test in the past, the strain testing precision majority that directly pastes resistance strain gage does not reach requirement, many still failures, its reason is as follows:
1. fail effectively to solve of the influence of temperature difference resistance variations to test result
Because xoncrete structure directly is subjected to the direct projection of sunlight and the influence of wind, in fact the variation of Concrete Structure Temperature field is very complicated and changes strong, the temperature of each measuring point and variation differ bigger, all mix compensation block and guarantee its temperature and change consistent for each measuring point.The temperature difference compensation that will be able to effectively carry out electric bridge is the very difficult work of part.And the technology by adopting the temperature compensation sheet to carry out the compensation of half-bridge and full-bridge was difficult to guarantee the temperature compensation of active gage, compensating plate and xoncrete structure or test specimen except that above-mentioned in the past, had more introduced to connect lead temperature difference resistance variations having a strong impact on electric bridge.We know that the connection lead-in wire of on-the-spot strain testing and lead can not be in the identical temperature field, because the temperature-coefficient of electrical resistance of copper wires is very high, as being 0.12m m to section
2Copper wires, when 1 ℃ of the every variation of the temperature difference, to produce the variation of 40us, 75us, 180us respectively for 10m, 20m, 50m line length, this is for the less engineering strain test of actual measurement strain absolute value, the temperature of generation waft can the stressed variation of covered structure value.
2. people exist not enough to concrete strain testing understanding heterogeneous, that have microfracture even cracking
At present, known concrete strain is counted long mark strainometer, and sensitive grid length reaches 50mm to 150mm, and it is material that paper substrate or glued membrane have been adopted in the substrate of foil gauge usually.Work gate length that it is generally acknowledged the concrete strain sheet should be greater than 4 times of cobble-stone diameters, and the concrete test that should not be used for having ftractureed.Analyze from concrete micromechanism, bullet, the plasticity of stone and sand-cement slurry colloid are to have evident difference in the concrete, and also have microfracture between stone and sand-cement slurry, are uneven so concrete ess-strain distributes; Analyze from macroscopic view relatively, there is unevenness in concrete surface, as has pore, sand holes, local segregation and honeycomb etc., and these phenomenons have further been strengthened the unevenness of concrete Strain Distribution, and cause the problem of response lag and sensitivity reduction; At the stressed generation of the xoncrete structure cracking eve, serious strain has just taken place and has heavily distributed in concrete, the theoretical value that makes the measurement of the foil gauge of single measuring point can not represent concrete mechanics to calculate.Adopting paper substrate or glued membrane is the strainometer of base material, because the cracking resistance of foil gauge itself is poor, loses efficacy in the local drawing crack of cracking initial stage foil gauge.Although therefore adopt the foil gauge of general long gauge length, also still can not adapt to the accurately requirement of test of xoncrete structure strain fully.
3. the insulation and the technology such as anti-interference of failing to guarantee foil gauge all meet the demands
Directly paste foil gauge at concrete surface, no matter be stress test short-term or long-term, all be very wrong and irresponsible behavior certainly, because concrete insulation resistance is the high request that impossible satisfy resistor straining testing, and xoncrete structure itself is often with regard to a serious Electromagnetic Interference source.At the scene foil gauge is carried out the protection against the tide processing and be difficult to reach technical requirement, also reckoned without the problem of the Electromagnetic Interference of concrete strain sheet in the past.
Directly paste change at the scene and also have time-consuming taking a lot of work and safe problem, also occur pasting defectives such as off normal during paster easily, on xoncrete structure, paste long gauge length to answer, defectives such as the middle drum that come to nothing of foil gauge often occur, cause on-the-spot paster success ratio low.
Summary of the invention
The purpose of this utility model is:
1. adopt the fortifying fibre substrate of low-elasticity-modulus, and utilize put more energy into metal foil and metal foil line to set up the anchored end of foil gauge substrate, make foil gauge can be more suitable in heterogeneous body, have microfracture even ftracture concrete strain testing.
2. on the fortifying fibre basal surface, design glue permeates ditch and shear connector, guarantees the bonding force and the shearing strength of foil gauge.
3. adopt the three-way mode of connection of a slice, the temperature difference resistance of compensating wire is to the influence of test result automatically.
4. consider to be designed to incorporate integrated foil gauge, guaranteeing under the technical requirement such as insulation resistance to have on-the-spot advantage such as easy for installation, quick, safe.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of concrete integrated strain gauge, comprise the fortifying fibre substrate, strain sensitive resistance, the three-core shielding line, the waterproof sealing glue-line and the metal foil line of putting more energy into, the work gate length that it is characterized in that strain sensitive resistance is greater than 48mm, strain sensitive resistance vertically is laid on the front of fortifying fibre substrate, a heart yearn of three-core shielding line is connected to an end of strain sensitive resistance, other two heart yearns of three-core shielding line are connected to the other end of strain sensitive resistance simultaneously, strain sensitive resistance on the front of fortifying fibre substrate and in the scope, the top of three-core shielding line covers the waterproof sealing glue-line of one deck flexibility, is distributed with the metal foil line of putting more energy in the fortifying fibre substrate.
The strain sensitive resistance that is characterised in that of the present utility model vertically is laid in the stage casing of fortifying fibre substrate, and the fortifying fibre substrate has all prolonged the length that is not less than more than the 10mm and formed anchored end at the two ends of strain sensitive resistance work gate length scope.Be that the fortifying fibre substrate front surface is coated with the metal foil of putting more energy on the extension at strain sensitive resistance work gate length scope two ends, the metal foil line of putting more energy at the lateral surface place of strain sensitive resistance, the metal foil of putting more energy into links to each other with the metal foil line of putting more energy into.And the screen layer of three-core shielding line can be connected on the metal foil of putting more energy into.
The metal foil line of putting more energy into that distributes at the fortifying fibre backside of substrate that is characterised in that of the present utility model is the oblique line or the virgule that tilt with the substrate Y, play the flexible effect of putting more energy on the one hand, between metal foil, form the wire casing of indent on the other hand, glue can effectively be infiltrated at the bottom of the sheet, guarantee the bonding force and the shearing strength of foil gauge, also the metal foil line of putting more energy into that can distribute at the fortifying fibre backside of substrate is the short-term parallel with the substrate Y, forms glue infiltration ditch.
Can on the back side of fortifying fibre substrate, design the indent wire casing that is evenly distributed and permeate ditch as glue.
The strain sensitive resistance that is characterised in that of the present utility model is a self-temperature-compensated strain ga(u)ge.
The beneficial effects of the utility model are, by adopting the fortifying fibre substrate of low-elasticity-modulus, and utilize put more energy into metal foil and metal foil line to set up the anchored end of foil gauge substrate, the characteristic that foil gauge is had temper toughness with gentleness and be difficult for breaking, the coordination ability with strain equilibrium makes it can be more suitable in heterogeneous body, have microfracture even ftracture concrete strain testing.By direct the put more energy into seam ditch of metal foil line of chase line or utilization in the design on the fortifying fibre basal surface, be designed to glue infiltration ditch and shear connector, when pasting foil gauge glue can effectively be infiltrated at the bottom of the sheet, reach the bonding force and the shearing strength of raising foil gauge.Adopt the three-way mode of connection of a slice, reach the purpose of the temperature difference resistance of automatic compensating wire the influence of test result.Adopted the fortifying fibre substrate and adopt the flexible water encapsulant to carry out whole waterproof sealing and handle, not only guaranteed the technical requirements such as insulation resistance of foil gauge, also have on-the-spot easy for installation, quick, in place accurately and result of use such as safety.
Description of drawings
Below in conjunction with drawings and Examples structure of the present utility model and implementation method are further described.
Fig. 1 is a kind of concrete integrated strain gauge structural representation.
Fig. 2 is the mode of connection synoptic diagram of foil gauge.
Fig. 3 is a kind of mode synoptic diagram of the metal foil line of putting more energy at the foil gauge back side.
Fig. 4 is the another kind of mode synoptic diagram of the metal foil line of putting more energy at the foil gauge back side.
Fig. 5 is the synoptic diagram that the fortifying fibre substrate front surface of foil gauge adopts metal foil to put more energy into.
Fig. 6 is the synoptic diagram of foil gauge back side design glue infiltration ditch.
Among the figure: 1. fortifying fibre substrate, 2. strain sensitive resistance, 3. three-core shielding line, 4. waterproof sealing glue-line, the metal foil of 5. putting more energy into line, the metal foil of 6. putting more energy into, 7. indent wire casing .8. self-temperature-compensated strain ga(u)ge.
Embodiment
A kind of concrete integrated strain gauge as shown in Figures 1 and 2, adopt the substrate of expoxy glass fortifying fibre, the fortifying fibre base length is greater than more than the long gauge length foil gauge work gate length 20mm, anchored end as foil gauge, 45 ° at the axial oblique angle of the metal foil of putting more energy into as shown in Figure 3 line and foil gauge, adopt three-core conductor as shown in Figure 2, adopt a slice three-wire connection with foil gauge, carried out whole waterproof sealing with silica gel etc. as waterproof and sealing material and handled, making the waterproof sealing glue-line is soft condition.
A kind of concrete integrated strain gauge as shown in Figure 5, the metal foil of on the extension of fortifying fibre substrate front surface, putting more energy into corresponding to strain sensitive resistance work gate length scope two ends, to increase anchoring section intensity, the metal foil line of putting more energy at the lateral surface place of strain sensitive resistance, to increase the strain coordination ability of foil gauge, the metal foil of will putting more energy into links to each other with the metal foil line of putting more energy into, and is connected to the screen layer of three-core shielding line, to improve the ability of its anti-electromagnetic interference (EMI).
All the other are with embodiment 1.
A kind of concrete integrated strain gauge adopts self-temperature-compensated strain ga(u)ge as shown in Figure 6, and directly designs the indent wire casing as the injecting glue ditch on the back side of fortifying fibre substrate.
All the other are with embodiment 1.
Claims (8)
1. concrete integrated strain gauge, comprise fortifying fibre substrate (1), strain sensitive resistance (2), three-core shielding line (3), the waterproof sealing glue-line (4) and the metal foil line (5) of putting more energy into, the work gate length that it is characterized in that strain sensitive resistance (2) is greater than 48mm, strain sensitive resistance (2) vertically is laid on the front of fortifying fibre substrate (1), a heart yearn of three-core shielding line (3) is connected to an end of strain sensitive resistance (2), other two heart yearns of three-core shielding line (3) are connected to the other end of strain sensitive resistance (2) simultaneously, strain sensitive resistance (2) on the front of fortifying fibre substrate (1) and in the scope, the top of three-core shielding line (3) covers the waterproof sealing glue-line (4) of one deck flexibility, is distributed with the metal foil line (5) of putting more energy in fortifying fibre substrate (1).
2. a kind of concrete integrated strain gauge according to claim 1, it is characterized in that strain sensitive resistance (2) vertically is laid in the stage casing of fortifying fibre substrate (1), fortifying fibre substrate (1) has all prolonged the length that is not less than more than the 10mm at the two ends of strain sensitive resistance (2) work gate length scope.
3. a kind of concrete integrated strain gauge according to claim 2, it is characterized in that fortifying fibre substrate (1) front is coated with the metal foil of putting more energy into (6) on the extension at strain sensitive resistance (2) work gate length scope two ends, the metal foil line (5) of putting more energy at the lateral surface place of strain sensitive resistance (2), the metal foil of putting more energy into (6) links to each other with the metal foil line (5) of putting more energy into.
4. a kind of concrete strain gauge according to claim 3 is characterized in that the shielding line lead of three-core shielding line (3) is connected on the metal foil of putting more energy into (6).
5. a kind of concrete integrated strain gauge according to claim 3 is characterized in that the metal foil line (5) of putting more energy into that distributes at fortifying fibre substrate (1) back side is the oblique line or the virgule that tilt with the substrate Y.
6. a kind of concrete integrated strain gauge according to claim 3 is characterized in that the metal foil line (5) of putting more energy into that distributes at fortifying fibre substrate (1) back side is the short-term parallel with the substrate Y.
7. a kind of concrete integrated strain gauge according to claim 1 is characterized in that the indent wire casing (5) that distributing on the back side of fortifying fibre substrate (1).
8. a kind of concrete integrated strain gauge according to claim 1 is characterized in that strain sensitive resistance (2) is a self-temperature-compensated strain ga(u)ge (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202178858U CN201697604U (en) | 2010-06-03 | 2010-06-03 | Integrated strain gauge for concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202178858U CN201697604U (en) | 2010-06-03 | 2010-06-03 | Integrated strain gauge for concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201697604U true CN201697604U (en) | 2011-01-05 |
Family
ID=43398852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202178858U Expired - Lifetime CN201697604U (en) | 2010-06-03 | 2010-06-03 | Integrated strain gauge for concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201697604U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363890A (en) * | 2013-07-22 | 2013-10-23 | 山东大学 | Pavement cracking monitoring method based on pulling sensitive effect of conducting polymers |
| CN104048591A (en) * | 2014-07-07 | 2014-09-17 | 重庆大学 | Carbon fiber yarn strain gage combination for measuring interior strain of early-stage concrete |
| CN104792257A (en) * | 2015-04-13 | 2015-07-22 | 重庆大学 | Method of measuring strains of multiple positions in young concrete at same time |
| CN105758363A (en) * | 2016-05-11 | 2016-07-13 | 西南交通大学 | Strain band for measuring soil layered strain in shaking table test |
| CN110068265A (en) * | 2019-03-26 | 2019-07-30 | 同济大学 | A kind of multistage surmounts triggering device for detecting deformation |
-
2010
- 2010-06-03 CN CN2010202178858U patent/CN201697604U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363890A (en) * | 2013-07-22 | 2013-10-23 | 山东大学 | Pavement cracking monitoring method based on pulling sensitive effect of conducting polymers |
| CN103363890B (en) * | 2013-07-22 | 2016-06-08 | 山东大学 | Pavement cracking monitoring method based on conducting polymer pulling sensitive effect |
| CN104048591A (en) * | 2014-07-07 | 2014-09-17 | 重庆大学 | Carbon fiber yarn strain gage combination for measuring interior strain of early-stage concrete |
| CN104792257A (en) * | 2015-04-13 | 2015-07-22 | 重庆大学 | Method of measuring strains of multiple positions in young concrete at same time |
| CN104792257B (en) * | 2015-04-13 | 2017-12-26 | 重庆大学 | It is a kind of to measure many places strain process inside early-age concrete simultaneously |
| CN105758363A (en) * | 2016-05-11 | 2016-07-13 | 西南交通大学 | Strain band for measuring soil layered strain in shaking table test |
| CN110068265A (en) * | 2019-03-26 | 2019-07-30 | 同济大学 | A kind of multistage surmounts triggering device for detecting deformation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201697604U (en) | Integrated strain gauge for concrete | |
| CN105605078B (en) | A kind of intelligent gasket device for monitoring bolt linkage interface | |
| CN106223189B (en) | Lead rubber laminated bearing, intelligent bearing and bearing monitoring system | |
| CN103575769B (en) | A kind of piezoelectric transducer for monitoring steel bar corrosion and monitoring steel bar corrosion method | |
| CN102269567A (en) | Self-compensating integrated strain gauge of concrete | |
| CN104729870B (en) | A kind of method of the existing prestress detection of concrete bridge structure | |
| CN102393329A (en) | Test device for time varying mechanical properties of column under load-environment coupling effect | |
| EP2947456B1 (en) | Method for positioning a sensor for concrete monitoring | |
| CN202339298U (en) | Device for testing mechanical properties of column under coupling action of load and environment | |
| CN104452984A (en) | Double-layer steel wire gauze insulating mortar outer wall outer insulating structure and construction method thereof | |
| CN209646857U (en) | A kind of waterproofing membrane production equipment with thickness monitor device | |
| CN110361155A (en) | A kind of air tunnel testing device of arc conducting wire wind load | |
| CN104792256A (en) | Device and method for concrete interior strain testing | |
| CN103401183A (en) | Assembled-type stringing method | |
| CN106123846B (en) | The device and method that aggregate settles in a kind of test fill paste | |
| CN204252298U (en) | Clad steel silk screen heat preservation slurry external heat preserving structure for exterior wall | |
| CN202170505U (en) | Large-tonnage load box capable of remotely applying pressure and detecting displacement | |
| CN106989663A (en) | Precast prestressed reinforced concrete member reinforcing bar strain measurement method | |
| CN203929060U (en) | A kind of inductance type intelligence static level instrument apparatus | |
| CN106436675B (en) | A kind of monitoring method of frozen ground regions foundation pit side-wall water-heat process | |
| CN202403765U (en) | Water level measurement device for foundation pit dewatering well | |
| CN202562922U (en) | Test device for measuring early-age anti-crack performance of layered pouring concrete | |
| CN208346789U (en) | Concrete pressure cell Embedded installation device | |
| CN209460039U (en) | A kind of prestressing force clamping plate | |
| CN104457549B (en) | A kind of fracture width automated watch-keeping facility |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hangzhou Gong Ke road and bridge Technology Co., Ltd. Assignor: Chen Yanping Contract record no.: 2013330000191 Denomination of utility model: Integrated strain gauge for concrete Granted publication date: 20110105 License type: Exclusive License Record date: 20130614 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| DD01 | Delivery of document by public notice |
Addressee: Chen Yanping Document name: Notification to Pay the Fees |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110105 |
|
| CX01 | Expiry of patent term |