CN202928732U - Prestressed concrete bridge absolute stress monitoring device - Google Patents
Prestressed concrete bridge absolute stress monitoring device Download PDFInfo
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- CN202928732U CN202928732U CN 201220557007 CN201220557007U CN202928732U CN 202928732 U CN202928732 U CN 202928732U CN 201220557007 CN201220557007 CN 201220557007 CN 201220557007 U CN201220557007 U CN 201220557007U CN 202928732 U CN202928732 U CN 202928732U
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- absolute stress
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 24
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims abstract description 26
- 239000004567 concrete Substances 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 238000013016 damping Methods 0.000 claims description 16
- 238000004458 analytical method Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 5
- 210000004027 cell Anatomy 0.000 description 19
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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- Force Measurement Appropriate To Specific Purposes (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a prestressed concrete bridge absolute stress monitoring device. The prestressed concrete bridge absolute stress monitoring device comprises a collection instrument which is connected with a strain gauge which is attached to the surface of a to-be-monitored concrete bridge body, an analyzing device and an elasticity modulus acquisition device. The elasticity modulus acquisition device acquires elasticity modulus according to collected absolute stress and strain in collection. The data output ends of the collection instrument and the elasticity modulus acquisition device are connected with the data input end of the analyzing device. The analyzing device acquires monitoring data according to the elasticity modulus value output by the elasticity modulus acquisition device and strain regularly received by the collection instrument. The prestressed concrete bridge absolute stress monitoring device provided by the utility model has the advantages that the measurement precision of absolute stress is improved; by regularly monitoring the surface strain change, absolute stress monitoring is realized; monitoring data are credible; the safety of the bridge structure can be ensured; and early warning is realized.
Description
Technical field
The utility model relates to the measurement of bridge absolute stress, relates in particular to Prestressed Concrete Bridges absolute stress monitoring device.
Background technology
Absolute stress refers to the summation of the actual stress that various loads, distortion and effect of contraction structurally produce also referred to as working stress or permanent stress.Wherein load has comprised bridge structure deadweight, car weight, wind and snow load etc.Distortion and effect of contraction refer to the factors such as temperature, displacement, distortion, foundation uneven settlement.The accurate detection of absolute stress has vital role to determining the present stress level of bridge structure, following stress safety margin.
At present, the equipment that traditional stress measurement is mainly adopted is strain gauge transducer, also referred to as foil gauge.The method of using normally passes through to measure the strain variation of pontic foil gauge when unloaded and carrying, then multiply by elastic modulus, draws the absolute stress of bridge structure.But the defective of the method is, can only measure the relative variation of pasting structural stress after foil gauge, but can not obtain the stress that structure has produced before pasting foil gauge.On the other hand, in the computation process of strain derivation stress, because concrete elastic modulus is difficult to determine, also can cause testing result inaccurate, therefore, can't monitor that absolute stress value and Stress calculation precision are low has affected bridge safety supervision and early warning.
The utility model content
Can't monitor the problem low with the Stress calculation precision in order to have solved in above-mentioned prior art absolute stress, the utility model provides a kind of Prestressed Concrete Bridges absolute stress monitoring device, can monitor comparatively accurately the absolute stress of bridge concrete structure.
Prestressed Concrete Bridges absolute stress monitoring device of the present utility model, comprise the Acquisition Instrument that is connected with strainometer, described strainometer and concrete bridge to be monitored surface attaching, also comprise, analytical equipment and elastic modulus deriving means, described elastic modulus deriving means obtains elastic modulus according to the absolute stress that gathers and the strain in described collection, the data output end of described Acquisition Instrument and described elastic modulus deriving means is connected with the data input pin of described analytical equipment, described analytical equipment obtains Monitoring Data according to the strain that elastic mould value and the described Acquisition Instrument of described elastic modulus deriving means output regularly receives.
In some embodiments, described elastic modulus deriving means comprises: elastic modulus measurement analysis device, absolute stress harvester and strain acquirement device, described elastic modulus measurement analysis device is connected with described absolute stress harvester and strain acquirement device, strain stress and elastic modulus E=σ/ε formula according to absolute stress σ and the described strain acquirement device of described absolute stress harvester collection gathers in the collection of described absolute stress harvester obtain elastic modulus E.
In some embodiments, described absolute stress harvester comprises: gather with absolute stress absolute stress Acquisition Instrument, force application apparatus, device for measuring force and the control device that strainometer is connected, described absolute stress gathers strainometer and the surface attaching of described concrete bridge to be monitored; Device for measuring force is connected with the force application apparatus force surface, is placed in described concrete bridge surface fluting, puts on stress in described fluting for detection of force application apparatus; The control device input end is connected with absolute stress Acquisition Instrument output terminal, device for measuring force output terminal respectively, and the control device output terminal is connected with the force application apparatus control end; Send application of force signal to described force application apparatus control end, after making the strain of absolute stress Acquisition Instrument output terminal be returned to initial value, gathering device for measuring force output terminal stress is absolute stress.
In some embodiments, electric resistance wire strain gauge is counted in described absolute stress collection strain, described force application apparatus is that Miniature hydraulic jick, described device for measuring force are that miniature force cell, described control device are PLC.
In some embodiments, described Miniature hydraulic jick piston end surface surface is the sawtooth texture, and the sensitive surface that miniature force cell is fixedly connected with described piston area is corresponding sawtooth texture.
In some embodiments, also comprise: damping gasket, described damping gasket are placed between described Miniature hydraulic jick piston end surface and sensitive surface that described miniature force cell is fixedly connected with, and the surface has the sawtooth texture.
In some embodiments, described Miniature hydraulic jick piston end surface middle part be projection, and the sensitive surface that miniature force cell is fixedly connected with described piston end surface is for annular accordingly, can with the described clearance fit that convexes to form.
In some embodiments, also comprise: damping gasket, described damping gasket is placed between described Miniature hydraulic jick piston end surface middle part projection and sensitive surface loop configuration that described miniature force cell is fixedly connected with, and damping gasket thickness is less than described height of projection.
In some embodiments, also comprise: prior-warning device, described prior-warning device comprises: the early warning load module that is linked in sequence, early warning comparison module and alarm output device, described early warning load module is connected with described analytical equipment output terminal, reception is from the Monitoring Data of described analytical equipment, described early warning comparison module compares according to Monitoring Data and the local early warning value that described early warning load module receives, when Monitoring Data during greater than early warning value, to described alarm output device output alarm signal, make described alarm output device output information warning.
In some embodiments, described alarm output device comprises: warning lamp and hummer.
Compared with prior art, above-mentioned embodiment of the present utility model has the following advantages: the stress monitoring value of obtaining is absolute stress, does not have the impact of temperature in default (elastic modulus) and means of testing.Elastic modulus for the calculated stress monitor value is used is the multiple averaging value, and is more accurate than the default to the concrete-bridge elastic modulus in prior art.Therefore the method has not only improved the measuring accuracy of absolute stress, and can realize by the strain variation on periodic monitoring surface the monitoring to absolute stress, and observation process is simple to operate, and Monitoring Data has more credibility.
Description of drawings
Fig. 1 is the connection diagram of the utility model Prestressed Concrete Bridges absolute stress monitoring device;
Fig. 2 is the connection diagram of Fig. 1 Elastic Modulus deriving means;
Fig. 3 is the connection diagram of absolute stress harvester in Fig. 2;
Fig. 4 is the connection diagram of prior-warning device in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, but not as to restriction of the present utility model.
Fig. 1, Fig. 2, Fig. 3, Fig. 4 have schematically shown Prestressed Concrete Bridges absolute stress monitoring device of the present utility model.
As shown in Figure 1, Prestressed Concrete Bridges absolute stress monitoring device of the present utility model comprises electric resistance wire strain gauge 11, Acquisition Instrument 12, analytical equipment 13, elastic modulus deriving means 14 and prior-warning device 15.
Electric resistance wire strain gauge 11 and concrete bridge to be monitored surface attaching;
The data output end of Acquisition Instrument 12 and elastic modulus deriving means 14 is connected with the data input pin of analytical equipment 13; Elastic modulus deriving means 14 obtains elastic modulus according to the strain in the absolute stress that gathers and collection, and analytical equipment 13 obtains Monitoring Data according to the elastic mould value of elastic modulus deriving means 14 outputs and the strain of Acquisition Instrument 12 timing receptions.
Elastic modulus deriving means 14 comprises as shown in Figure 2: elastic modulus measurement analysis device 21, absolute stress harvester 22 and strain acquirement device 23.
Elastic modulus measurement analysis device 21 is connected with absolute stress harvester 22 and strain acquirement device 23; Strain stress and elastic modulus E=σ/ε formula that the absolute stress σ that gathers according to absolute stress harvester 22 and strain acquirement device 23 gather in absolute stress harvester 22 gathers, elastic modulus measurement analysis device 21 is obtained elastic modulus E.
Absolute stress harvester 22 comprises as shown in Figure 3: the absolute stress Acquisition Instrument 32 that is connected with electric resistance wire strain gauge 31, Miniature hydraulic jick 33, miniature force cell 34 and PLC35.
Electric resistance wire strain gauge 31 and concrete bridge to be detected surface attaching; Miniature force cell 34 is connected with Miniature hydraulic jick 33 force surfaces, is placed in concrete bridge to be measured surface fluting, puts on stress in described fluting for detection of Miniature hydraulic jick 33; The PLC35 input end is connected with absolute stress Acquisition Instrument 32 output terminals, miniature force cell 34 output terminals respectively, and the PLC35 output terminal is connected with Miniature hydraulic jick 33 control ends; Send application of force signal to Miniature hydraulic jick 33 control ends, after making the 32 output terminal strains of absolute stress Acquisition Instrument be returned to initial value, gathering miniature force cell 34 output terminal stress is absolute stress.
In the present embodiment, Miniature hydraulic jick 33 piston end surface surfaces are the sawtooth texture, and the sensitive surface that miniature force cell 34 is fixedly connected with Miniature hydraulic jick 33 piston areas is corresponding sawtooth texture.Be provided with damping gasket between Miniature hydraulic jick 33 piston end surfaces and sensitive surface that miniature force cell 34 is fixedly connected with, damping gasket positive and negative surface has the sawtooth texture.Thus, damping gasket can play anti-skidding effect, makes testing result more accurate.
In other embodiments, be provided with projection at Miniature hydraulic jick 33 piston end surfaces middle parts, the sensitive surface that miniature force cell 34 is fixedly connected with Miniature hydraulic jick 33 piston end surfaces is for corresponding annular, can with the described clearance fit that convexes to form.Be provided with damping gasket between Miniature hydraulic jick 33 piston end surfaces middle part projections and sensitive surface loop configuration that miniature force cell 34 is fixedly connected with, damping gasket thickness is less than described height of projection.Thus, damping gasket can play anti-skidding effect, makes testing result more accurate.
The absolute stress monitoring device of the present embodiment also comprises prior-warning device 15 as shown in Figure 4, and prior-warning device 15 comprises early warning load module 41, early warning comparison module 42 and the alarm output device 43 that is linked in sequence, and alarm output device 43 comprises: warning lamp and hummer.
Early warning load module 41 is connected with analytical equipment 13 output terminals, reception is from the Monitoring Data of analytical equipment 13, early warning comparison module 42 compares according to Monitoring Data and the local early warning value that early warning load module 41 receives, when Monitoring Data during greater than early warning value, to described alarm output device 43 output alarm signals, make described alarm output device output information warning.
Prestressed Concrete Bridges absolute stress monitoring device of the present utility model is worked as follows: electric resistance wire strain gauge 11 and concrete bridge to be detected surface attaching.The Acquisition Instrument 12 that is connected with electric resistance wire strain gauge 11 gathers the initial strain value of this moment, and the signal of this information is transferred to PLC35 by output terminal.At this concrete bridge surface fluting, miniature force cell 34 is connected with the force surface piston end surface of Miniature hydraulic jick 33, be placed in fluting, split for detection of Miniature hydraulic jick 33 the top power that cell wall applies.After fluting, strain value changes and is not equal to the initial strain value, and this signal is transferred to PLC35.PLC35 is to the electromagnetic signal of the control end output beginning application of force of Miniature hydraulic jick 33.External motive device is started working, the outside jack-up of the piston of Miniature hydraulic jick 33.The miniature force cell 34 that is fixedly connected with the piston upper end is motion thereupon also, and when miniature force cell 34 induction end other end Surface Contact body of wall, the absolute stress monitoring device begins to produce top power to pontic.Simultaneously, accurately induction is from pressure and the output signal of the force surface piston of Miniature hydraulic jick 33 for the induction end of miniature force cell 34, and signal is by in the PLC35 that data line is transported to output terminal is connected.After Miniature hydraulic jick 33 was started working, PLC35 carried out computing always, and whether the strain value that is relatively received by Acquisition Instrument equals the initial strain value.If be not equal to, output signal not; If equal, stop the signal of the application of force to the control end output of Miniature hydraulic jick 33, and collection miniature force cell 34 output terminal stress this moment are initial absolute stress.
Utilize the classification method that returns back to top, PLC35 sends application of force signal to Miniature hydraulic jick 33 control ends, the absolute stress σ that miniature force cell 34 gathers, simultaneously, strain acquirement device 23 gathers strain stress, according to elastic modulus E=σ/ε formula, elastic modulus measurement analysis device 21 is obtained elastic modulus E.
Strain value and the elastic modulus E that obtains of elastic modulus deriving means 14 that the Acquisition Instrument 12 that will be connected with electric resistance wire strain gauge 11 gathers in observation processes not in the same time are input to analytical equipment 13; Analytical equipment 13 obtains Monitoring Data according to the elastic mould value of elastic modulus deriving means 14 outputs and the strain of Acquisition Instrument 12 timing receptions.
Above-described is only embodiments more of the present utility model.For the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model creation design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (10)
1. Prestressed Concrete Bridges absolute stress monitoring device, it is characterized in that, comprise the Acquisition Instrument that is connected with strainometer, analytical equipment and elastic modulus deriving means, described strainometer and concrete bridge to be monitored surface attaching, described elastic modulus deriving means obtains elastic modulus according to the absolute stress that gathers and the strain in described collection, the data output end of described Acquisition Instrument and described elastic modulus deriving means is connected with the data input pin of described analytical equipment, described analytical equipment obtains Monitoring Data according to the strain that elastic mould value and the described Acquisition Instrument of described elastic modulus deriving means output regularly receives.
2. monitoring device as claimed in claim 1, it is characterized in that, described elastic modulus deriving means comprises: elastic modulus measurement analysis device, absolute stress harvester and strain acquirement device, described elastic modulus measurement analysis device is connected with described absolute stress harvester and strain acquirement device, strain stress and elastic modulus E=σ/ε formula according to absolute stress σ and the described strain acquirement device of described absolute stress harvester collection gathers in the collection of described absolute stress harvester obtain elastic modulus E.
3. monitoring device as claimed in claim 2, it is characterized in that, described absolute stress harvester comprises: gather with absolute stress absolute stress Acquisition Instrument, force application apparatus, device for measuring force and the control device that strainometer is connected, described absolute stress gathers strainometer and the surface attaching of described concrete bridge to be monitored; Device for measuring force is connected with the force application apparatus force surface, is placed in described concrete bridge surface fluting, puts on stress in described fluting for detection of force application apparatus; The control device input end is connected with absolute stress Acquisition Instrument output terminal, device for measuring force output terminal respectively, and the control device output terminal is connected with the force application apparatus control end; Send application of force signal to described force application apparatus control end, after making the strain of absolute stress Acquisition Instrument output terminal be returned to initial value, gathering device for measuring force output terminal stress is absolute stress.
4. monitoring device as claimed in claim 3, is characterized in that, electric resistance wire strain gauge is counted in described absolute stress collection strain, described force application apparatus is that Miniature hydraulic jick, described device for measuring force are that miniature force cell, described control device are PLC.
5. monitoring device as claimed in claim 4, is characterized in that, described Miniature hydraulic jick piston end surface surface is the sawtooth texture, and the sensitive surface that miniature force cell is fixedly connected with described piston area is corresponding sawtooth texture.
6. monitoring device as claimed in claim 5, is characterized in that, also comprises: damping gasket, described damping gasket are placed between described Miniature hydraulic jick piston end surface and sensitive surface that described miniature force cell is fixedly connected with, and the surface has the sawtooth texture.
7. monitoring device as claimed in claim 4, is characterized in that, described Miniature hydraulic jick piston end surface middle part be projection, and the sensitive surface that miniature force cell is fixedly connected with described piston end surface is for annular accordingly, can with the described clearance fit that convexes to form.
8. monitoring device as claimed in claim 7, it is characterized in that, also comprise: damping gasket, described damping gasket is placed between described Miniature hydraulic jick piston end surface middle part projection and sensitive surface loop configuration that described miniature force cell is fixedly connected with, and damping gasket thickness is less than described height of projection.
9. monitoring device as claimed in claim 1, it is characterized in that, also comprise: prior-warning device, described prior-warning device comprises: the early warning load module that is linked in sequence, early warning comparison module and alarm output device, described early warning load module is connected with described analytical equipment output terminal, reception is from the Monitoring Data of described analytical equipment, described early warning comparison module compares according to Monitoring Data and the local early warning value that described early warning load module receives, when Monitoring Data during greater than early warning value, to described alarm output device output alarm signal, make described alarm output device output information warning.
10. monitoring device as claimed in claim 9, is characterized in that, described alarm output device comprises: warning lamp and hummer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220557007 CN202928732U (en) | 2012-10-26 | 2012-10-26 | Prestressed concrete bridge absolute stress monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220557007 CN202928732U (en) | 2012-10-26 | 2012-10-26 | Prestressed concrete bridge absolute stress monitoring device |
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| CN202928732U true CN202928732U (en) | 2013-05-08 |
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| CN 201220557007 Expired - Fee Related CN202928732U (en) | 2012-10-26 | 2012-10-26 | Prestressed concrete bridge absolute stress monitoring device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729870A (en) * | 2015-04-02 | 2015-06-24 | 天津市市政工程研究院 | Existing-prestress detection method for concrete bridge structure |
| CN106770360A (en) * | 2016-12-22 | 2017-05-31 | 重庆交通大学 | A kind of concrete work method for measuring stress |
| CN107907167A (en) * | 2018-01-05 | 2018-04-13 | 交通运输部公路科学研究所 | A kind of bridge cable hanging apparatus safety monitoring method and system |
| CN109577184A (en) * | 2018-11-22 | 2019-04-05 | 筑梦高科建筑有限公司 | A kind of bridge construction quality detection apparatus |
| CN111089711A (en) * | 2019-11-25 | 2020-05-01 | 中铁十四局集团第一工程发展有限公司 | Cast-in-place support strain monitoring system and method |
| CN113359645A (en) * | 2021-06-30 | 2021-09-07 | 四川交达预应力工程检测科技有限公司 | Prestressed construction monitoring and early warning system and method based on engineering Internet of things |
| CN115574997A (en) * | 2022-09-29 | 2023-01-06 | 中交一公局第七工程有限公司 | System and method for monitoring stress of precast beam in full life cycle |
| CN116296014A (en) * | 2023-05-18 | 2023-06-23 | 北京市建筑工程研究院有限责任公司 | Device and method suitable for effective prestress equivalent nondestructive testing of existing structure |
-
2012
- 2012-10-26 CN CN 201220557007 patent/CN202928732U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729870A (en) * | 2015-04-02 | 2015-06-24 | 天津市市政工程研究院 | Existing-prestress detection method for concrete bridge structure |
| CN104729870B (en) * | 2015-04-02 | 2018-01-02 | 天津市市政工程研究院 | A kind of method of the existing prestress detection of concrete bridge structure |
| CN106770360A (en) * | 2016-12-22 | 2017-05-31 | 重庆交通大学 | A kind of concrete work method for measuring stress |
| CN107907167A (en) * | 2018-01-05 | 2018-04-13 | 交通运输部公路科学研究所 | A kind of bridge cable hanging apparatus safety monitoring method and system |
| CN107907167B (en) * | 2018-01-05 | 2023-08-29 | 交通运输部公路科学研究所 | Safety monitoring method and system for bridge cable hoisting device |
| CN109577184A (en) * | 2018-11-22 | 2019-04-05 | 筑梦高科建筑有限公司 | A kind of bridge construction quality detection apparatus |
| CN111089711A (en) * | 2019-11-25 | 2020-05-01 | 中铁十四局集团第一工程发展有限公司 | Cast-in-place support strain monitoring system and method |
| CN113359645A (en) * | 2021-06-30 | 2021-09-07 | 四川交达预应力工程检测科技有限公司 | Prestressed construction monitoring and early warning system and method based on engineering Internet of things |
| CN115574997A (en) * | 2022-09-29 | 2023-01-06 | 中交一公局第七工程有限公司 | System and method for monitoring stress of precast beam in full life cycle |
| CN115574997B (en) * | 2022-09-29 | 2023-09-26 | 中交一公局第七工程有限公司 | Full life cycle stress monitoring system and method for precast beam |
| CN116296014A (en) * | 2023-05-18 | 2023-06-23 | 北京市建筑工程研究院有限责任公司 | Device and method suitable for effective prestress equivalent nondestructive testing of existing structure |
| CN116296014B (en) * | 2023-05-18 | 2023-09-05 | 北京市建筑工程研究院有限责任公司 | Device and method suitable for effective prestress equivalent nondestructive testing of existing structure |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20131026 |