CN201724663U - Girder type bridge displacement dynamic measuring system based on strain gauges - Google Patents
Girder type bridge displacement dynamic measuring system based on strain gauges Download PDFInfo
- Publication number
- CN201724663U CN201724663U CN2010202035233U CN201020203523U CN201724663U CN 201724663 U CN201724663 U CN 201724663U CN 2010202035233 U CN2010202035233 U CN 2010202035233U CN 201020203523 U CN201020203523 U CN 201020203523U CN 201724663 U CN201724663 U CN 201724663U
- Authority
- CN
- China
- Prior art keywords
- bridge
- displacement
- girder
- strain
- strain gauges
- 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 - Fee Related
Links
Images
Landscapes
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
A girder type bridge displacement dynamic measuring system based on strain gauges comprises the strain gauges, an acquisition device and a strain data processing device. The system is characterized in that the strain gauges are longitudinally equidistantly arranged on a bridge girder to be tested along the girder, at least five sets of the strain gauges is arranged in every span, and each set of the strain gauges includes two strain gauges arranged along the girder height. The strain data processing device is used for processing acquired strain data to obtain curvature of a deflection line of the bridge girder, a bridge girder deflection function is finally obtained by applying the curvature data to a deflection function for fitting, and accordingly dynamic displacement of an optional point of the bridge girder is obtained. The girder type bridge displacement dynamic measuring system without any displacement measuring instrument can analyze bridge girder displacement in real time by only utilizing existing strain data, and can generate power response to displacement.
Description
Technical field
The utility model belongs to the physics mode processing technology field, especially relates to a kind of existing strain data that utilizes, the displacement of real-time analysis bridge, and can form the beam bridge displacement dynamic measurement system of the dynamic response of displacement.
Background technology
Bridge rigidity is one of principal element that can the decision bridge safe operation, can obtain the rigidity information of bridge by the displacement of measuring the bridge key position, and therefore, it is very necessary that real time dynamic measurement is carried out in the bridge displacement.
Cross over barriers such as river, river, mountain stream when bridge, or when crossing over urban road, owing to can not lay fixed support, there is the difficulty that can't install in contact displacement measuring instrument (as displacement meter etc.).The hysteresis quality of displacement response is beneficial to the contactless displacement monitoring instrument (as hydrostatic level etc.) of installation, owing to can not be carried out real-time dynamic monitoring to the bridge displacement.
Advantages such as at present, strainometer has been widely used in measuring the strain of bridge, and it has the precision height, is convenient to install, and response speed is fast.The dynamic strain of bridge can be easy to record, but does not have effective method can use the dynamic displacement that the strainometer measurement data draws bridge at present.
The utility model content
Technical problem to be solved in the utility model provide a kind of cheap, dynamic, precision is high, can satisfy the beam bridge displacement dynamic measurement system that beam bridge dynamic displacement monitoring requires.
For solving the problems of the technologies described above, the utility model provides a kind of beam bridge displacement dynamic measurement system based on strainometer, comprise strainometer, harvester, strainometer is used for measuring in real time strain, harvester is used for gathering in real time strain data, it is characterized in that: strainometer vertically is set in qually spaced on the bridge to be measured along beam, and the strainometer quantity of whenever striding is provided with 5 groups at least, every group of strain counted 2, along the deck-molding setting; Also comprise a strain data treating apparatus simultaneously, be used for the strain data that collects is handled, draw bridge deflection curvature of a curve, use curvature data flexural function is carried out match, finally draw the bridge flexural function, thereby obtain the dynamic displacement of bridge any point.
The utility model is gathered strain data in real time by harvester, and the strain data that collects is handled by the strain data treating apparatus, draw bridge deflection curvature of a curve, use curvature data flexural function is carried out match, finally draw the bridge flexural function, thereby obtain the displacement of bridge any point, need not any displacement measuring instrument, only utilize existing strain data, just can analyze the bridge displacement in real time, and can form the dynamic response of displacement.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the cross-section cutaway view along A-A line among Fig. 1.
Embodiment
In displacement dynamic monitoring to bridge, for arbitrary the striding in the bridge, choose basis function number k=4, measuring point number n=5 just can make displacement measurement errors reach in 1%, can satisfy the requirement of engineering precision.Choosing true origin is bearing place, left side, and this footpath of striding of striding of bridge is l, then l
1=0, l
2=l, the computation model of structure line of deflection:
y(x)＝x(x-l)(X
1+X
2·x+X
3·x
2+X
4·x
3)
With reference to Fig. 1, Fig. 2, the strainometer in the measuring system 1 is arranged on the bridge to be measured.Whenever stride along the vertical five equilibrium spanning of beam at bridge and to arrange five groups of strainometers, every group of strainometer comprises two strainometers 2 arranging along deck-molding.For at the bridge of building, can adopt the strainometer of flush type, strainometer is imbedded in the concrete; For the bridge that has built up, can adopt the surface strain meter, strainometer is pasted on the bridge surface.After strainometer was arranged and to be finished, selected true origin was measured every group of strainometer along beam coordinate figure x longitudinally
j(j=1,2 ..., 5) and each group in two strainometers along the separation delta z of deck-molding
jReserve the strainometer data line 3 of sufficient length, so that strainometer is connected to harvester 4.Harvester 4 is arranged in and is convenient to the position of operating on the bridge, as is arranged on the abutment (pier) 7 or on the bridge floor 6.Strainometer data line 3 inserts harvester 4.The data output of harvester 4 is connected with strain data treating apparatus 5, receive the real-time strain data that harvester collects by the strain data treating apparatus, the computation model that utilizes the present invention to propose, analyze each bridge flexural function constantly, obtain the deflection value of any point on the girder, form the dynamic response of bridge each point displacement.
Each of bridge striden all adopt above-mentioned measuring point to arrange and data acquisition analysis method, just can obtain the displacement dynamic response of bed rearrangement bridge, realize the displacement kinetic measurement of whole bridge.
Method by test and numerical simulation, striding 30m free beam and two to one strides the continuous beam adopting said method of 30m+30m and has carried out displacement measurement, measure under the free from error situation at strainometer, the displacement result error can satisfy the requirement of bridge real-time displacement monitoring in 1%.
Claims (1)
1. beam bridge displacement dynamic measurement system based on strainometer, comprise strainometer, harvester, strainometer is used for measuring in real time strain, harvester is used for gathering in real time strain data, it is characterized in that: strainometer vertically is set in qually spaced on the bridge to be measured along beam, the strainometer quantity of whenever striding is provided with 5 groups at least, and every group of strain counted 2, along the deck-molding setting; Also comprise a strain data treating apparatus simultaneously, be used for the strain data that collects is handled, obtain the dynamic displacement of bridge any point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202035233U CN201724663U (en) | 2010-05-26 | 2010-05-26 | Girder type bridge displacement dynamic measuring system based on strain gauges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202035233U CN201724663U (en) | 2010-05-26 | 2010-05-26 | Girder type bridge displacement dynamic measuring system based on strain gauges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201724663U true CN201724663U (en) | 2011-01-26 |
Family
ID=43493000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202035233U Expired - Fee Related CN201724663U (en) | 2010-05-26 | 2010-05-26 | Girder type bridge displacement dynamic measuring system based on strain gauges |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201724663U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106871847A (en) * | 2017-02-20 | 2017-06-20 | 广西交通科学研究院有限公司 | Method based on bridge dynamic strain identification fleet bicycle spacing |
-
2010
- 2010-05-26 CN CN2010202035233U patent/CN201724663U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106871847A (en) * | 2017-02-20 | 2017-06-20 | 广西交通科学研究院有限公司 | Method based on bridge dynamic strain identification fleet bicycle spacing |
| CN106871847B (en) * | 2017-02-20 | 2019-01-18 | 广西交通科学研究院有限公司 | Method based on bridge dynamic strain identification fleet's bicycle spacing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101865683A (en) | Beam bridge displacement dynamic measurement system and measurement method based on strain gauges | |
| CN101532917B (en) | Quick load test method for bridge carrying capacity | |
| CN106092623B (en) | A kind of bridge structural damage identification appraisal procedure based on long gauge length stiffness coefficient | |
| TW201035416A (en) | Method for evaluating bridge safety with vibration measurement | |
| CN101806668B (en) | Cable structure health monitoring method based on cable tension monitoring | |
| CN104133960A (en) | Improved optimal arranging method of static sensors | |
| CN104215413B (en) | Long-term monitoring method applicable to deflection deformation of beam of historic building | |
| Kalhori et al. | Nothing-on-road axle detection strategies in bridge-weigh-in-motion for a cable-stayed bridge: Case study | |
| CN205352597U (en) | Bridge perpetuity prestressing force detection device | |
| CN201724663U (en) | Girder type bridge displacement dynamic measuring system based on strain gauges | |
| CN101285729B (en) | Arch bridge deflection measuring apparatus | |
| CN102735468A (en) | Identification method for damaged cables based on mixed monitoring of generalized displacement and temperature change of support | |
| CN106596002A (en) | High-speed railway steel truss arch bridge vehicle-bridge resonance curve measuring method | |
| CN102706391A (en) | Troubled cable and supporting seat translation progressive-type identification method for combined monitoring during variation of temperature | |
| CN113624319B (en) | Rail transit annular vibration simulation test device | |
| CN109797786A (en) | Excavation of foundation pit model test apparatus and application method based on earth's surface water penetration | |
| CN101793631B (en) | Cable structure health monitoring method based on space coordinate monitoring | |
| CN101793632A (en) | Cable structure health monitoring method based on strain monitoring | |
| CN105868493A (en) | Damage diagnosis and positioning method for basin-type rubber support of continuous steel truss arch bridge | |
| CN101793630B (en) | Cable structure health monitoring method based on angle monitoring | |
| CN203489865U (en) | High-performance structural static and dynamic angle meter | |
| CN105910589B (en) | Open channel flow rate speed tests the speed abacus and application method | |
| CN102735471A (en) | Strain monitoring-based damaged cable recognition method in support generalized displacement and temperature change | |
| CN102735465A (en) | Slack cable identifying method based on strain monitoring at time of change in support angular displacement and temperature | |
| CN102735469A (en) | Strain monitoring-based damaged cable recognition method in support angular displacement and temperature change |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20110526 |