CN105445099A - Experiment apparatus for observing generation and development of concrete cracks - Google Patents
Experiment apparatus for observing generation and development of concrete cracks Download PDFInfo
- Publication number
- CN105445099A CN105445099A CN201510937020.6A CN201510937020A CN105445099A CN 105445099 A CN105445099 A CN 105445099A CN 201510937020 A CN201510937020 A CN 201510937020A CN 105445099 A CN105445099 A CN 105445099A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an experiment apparatus for observing the generation and the development of concrete cracks. The apparatus is used for real-time omnibearing observation and recording of the generation and development of the concrete cracks to provide guidance application of practical engineering. A technical scheme adopted in the invention is characterized in that the apparatus comprises a reaction frame (1) arranged in a frame structure, a bearer sample loading platform (6) for fixing a test beam member (5) is arranged n the reaction frame (1), the upper end and the lower end of the bearer sample loading platform (6) are respectively provided with a hydraulic device for applying pressure to the test beam member (5), the upper beam and the lower beam of the bearer sample loading platform (6) are respectively provided with a sliding rail (3), the hydraulic device can move along the sliding rail (3), the bearer sample loading platform (6) is provided with a camera (4) capable of monitoring the generation and development process of the cracks, the camera (4) is connected to a computer (11), and the bearer sample loading platform (6) is provided with a lime brush (9) and a lime bucket (10).
Description
Technical field
The present invention relates to concrete test technical field, be specifically related to a kind of experimental provision observing distress in concrete that development occurs.
Background technology
Concrete component produce under external force crack often concrete component destroy beginning, therefore, observation concrete structure member crevices occur, development there is great using value.The instruments and methods occur for observation distress in concrete at present, developed mostly needs a large amount of manpowers and method exists dispute, and substantially all exist and be difficult to realize real-time, omnibearing gap observation and record, therefore the crack data observed mostly are the data that final development terminates, then record less for process data, and generally all observe the partial portion with recording member, be difficult to the whole process of the development of omnibearing reaction concrete structure member crevices, development.The method of known observation distress in concrete and instrument are generally artificial timing and get according to or record the development realizing concrete structure member crevices, but in some cases particularly in longer experiment consuming time, be difficult to the whole evolution in real time record and observation crack, the characteristic that distress in concrete occurs and develops can not be reacted really.
Summary of the invention
In order to solve the problems of the prior art, the present invention propose one can real-time omnibearing observation and record distress in concrete develop, can for Practical Project provide instruct application observation distress in concrete occur develop experimental provision.
In order to realize above object, the technical solution adopted in the present invention is: comprise the reaction frame arranged in framed structure, the bearing dress sample platform for fixing test beam is provided with in reaction frame, the upper and lower side of bearing dress sample platform is provided with the hydraulic means for exerting pressure to test beam, described bearing dress sample platform is provided with and can monitors the camera that evolution occurs in crack, camera is connected to computing machine.
Described hydraulic means comprises the top hydraulic jack of the upper end being arranged on bearing dress sample platform, and be arranged on the lower hydraulic lifting jack that bearing fills the lower end of sample platform, hydraulic jack one end, described top and bearing fill sample platform upper end and are connected, the other end is connected with the upper beam of reaction frame, described lower hydraulic lifting jack one end and bearing fill sample platform lower end and are connected, and the other end is connected with the underbeam of reaction frame.
The upper beam of described bearing dress sample platform and underbeam are provided with sliding rail, and top hydraulic jack and lower hydraulic lifting jack can move along sliding rail.
The upper beam of described bearing dress sample platform and underbeam are provided with the scale graticule for determining top hydraulic jack and lower hydraulic lifting jack position, centre position is zero graduation line.
Described top hydraulic jack and lower hydraulic lifting jack are provided with motor, and motor is connected to computing machine, and top hydraulic jack and lower hydraulic lifting jack can move along sliding rail under the driving of motor.
Described top hydraulic jack and lower hydraulic lifting jack are provided with pressure transducer, and pressure transducer is connected to computing machine.
Described top hydraulic jack and the quantity of lower hydraulic lifting jack are at least two.
Corresponding six positions testing beam six are provided with camera to described bearing dress sample platform.
Corresponding six positions testing beam six are provided with camera track to described bearing dress sample platform, and camera arranges drive motor, and drive motor is connected to computing machine, and drive motor can drive camera along camera rail moving.
Described bearing dress sample platform is provided with lime brush and lime bucket.
Compared with prior art, the method of known observation distress in concrete and instrument are generally artificial timing and get according to or record the development realizing concrete structure member crevices, but in some cases particularly in longer experiment consuming time, be difficult to the whole evolution in real time record and observation crack, the characteristic that distress in concrete occurs and develops can not be reacted really.Experimental provision of the present invention, on the upside of reaction frame, downside all arranges hydraulic means, for meeting the load needs of Different Loading Method, load is provided by hydraulic means, utilize camera take pictures in real time observation and record crack occur and development process, the present invention can overcome manpower the real-time comprehensive crack that has been difficult to occur, the observation of development and record, can comparatively comprehensively with under real record and the effect of observation concrete component outer load, each orientation, the generation in each several part crack and evolution, other disturbing factors of effective eliminating, directive significance and using value are had more to Practical Project.
Further, the upper and lower side of bearing dress sample platform arranges hydraulic means respectively, hydraulic means adopts hydraulic jack, the upper beam of bearing dress sample platform and underbeam are provided with sliding rail, and hydraulic jack is driven by motor, and hydraulic jack can need to move along sliding rail according to operating mode, test beam is exerted pressure, the load situation of realistic simulation, makes the experimental data that obtains true and reliable, has more directive significance and using value to Practical Project.
Further, the scale mark on bearing dress sample platform is conducive to the position observing hydraulic pressure a thousand pieces of gold top, and hydraulic control lifting jack reaches precalculated position, improves the precision of the present invention's experiment.
Further, utilize pressure transducer to gather hydraulic jack to test beam applied pressure size, image data is reliably accurate, improves experimental reliability of the present invention.
Further, the process of development is there is in camera for observing and recording crack on test each face of beam, camera is furnished with the camera track for fixing and dollying head, distribution is positioned at six of test beam, two cameras are for observing the front-back of test beam, two then for observing test beam upper surface and lower surface, two observation faces, left and right, camera can be moved to the position wanting to observe by camera track, and can move around, camera is connected with robot calculator, robot calculator is passed in record, observation and the record that development occurs in real-time comprehensive crack is carried out to test beam.
Further, lime bucket is used for holding lime, and lime brush is used for lime brush each surface in test beam, so that the generation evolution in better observation component crack.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Wherein, 1 is reaction frame, and 2 is top hydraulic jack, and 3 is sliding rail, 4 is camera, and 5 is test beam, and 6 is bearing dress sample platform, and 7 be camera track 8 is lower hydraulic lifting jack, 9 is lime brush, and 10 is lime bucket, and 11 is computing machine, and 12 is display.
Embodiment
Below in conjunction with specific embodiment and Figure of description, the present invention is further explained.
See Fig. 1, the present invention includes the reaction frame 1 arranged in framed structure, the bearing dress sample platform 6 for fixing test beam 5 is provided with in reaction frame 1, the upper and lower side of bearing dress sample platform 6 is provided with the hydraulic means for exerting pressure to test beam 5, bearing dress sample platform 6 is provided with and can monitors the camera 4 that evolution occurs in crack, camera 4 is connected to computing machine 11, and bearing dress sample platform 6 is also provided with lime brush 9 and lime bucket 10.
Hydraulic means comprises the top hydraulic jack 2 of the upper end being arranged on bearing dress sample platform 6, and be arranged on the lower hydraulic lifting jack 8 that bearing fills the lower end of sample platform 6, top hydraulic jack 2 one end and bearing fill sample platform 6 upper end and are connected, the other end is connected with the upper beam of reaction frame 1, lower hydraulic lifting jack 8 one end and bearing fill sample platform 6 lower end and are connected, and the other end is connected with the underbeam of reaction frame 1.The upper beam of bearing dress sample platform 6 and underbeam are provided with sliding rail 3, and top hydraulic jack 2 and lower hydraulic lifting jack 8 can move along sliding rail 3.The upper beam of bearing dress sample platform 6 and underbeam are provided with the scale graticule for determining top hydraulic jack 2 and lower hydraulic lifting jack 8 position, centre position is zero graduation line.Top hydraulic jack 2 and lower hydraulic lifting jack 8 are provided with motor, and motor is connected to computing machine 11, and top hydraulic jack 2 and lower hydraulic lifting jack 8 can move along sliding rail 3 under the driving of motor.Top hydraulic jack 2 and lower hydraulic lifting jack 8 are provided with pressure transducer, and pressure transducer is connected to computing machine 11.The quantity of top hydraulic jack 2 and lower hydraulic lifting jack 8 is at least two.
Corresponding six positions testing beam 5 six are provided with camera 4 to bearing dress sample platform 6.Corresponding six positions testing beam 5 six are provided with camera track 7 to bearing dress sample platform 6, and camera 4 arranges drive motor, and drive motor is connected to computing machine 11, and drive motor can drive camera 4 to move along camera track 7.
The present invention forms primarily of following critical piece: pedestal, control desk, dress sample platform, reaction frame, hydraulic means, pressure transducer, moving track, camera, lime bucket, lime brush, robot calculator.
Pedestal is counterweight base, plays stabilization to whole system, is arranged at bottom of the present invention, is rectangle counterweight base, ensures that whole system applies to start to stablizing in the whole process of component damage at load.
Control desk is control center of the present invention, comprise computing machine 11 and display 12, for the movement of hydraulic control device, the applying of hydraulic load, control action is played to whole system, ensure that instrument can apply form according to the load of expection and carry out, control desk is connected with hydraulic system, robot calculator.
By concrete or reinforced concrete member is stable places and fixing before bearing dress sample platform 6 carries out for test, and after on-test, then can remove dress sample platform, material can be shaped steel or other materials.
Reaction frame 1 is connected with pedestal, applying for load provides effective counter-force to support, material should have enough Rigidity and strengths, so that the applying carrying out load in process in test is comparatively stable and less on test findings impact, the lower plane of reaction frame cross-head portion lays sliding rail, for suspension and the movement of hydraulic means, and on reaction frame upper beam anterior-posterior plane, arrange the scale from centre to both sides, centre is zero groove, increase with minimum scale successively to two ends, for determining the position of hydraulic means, sliding rail is then arranged at the upper plane of this beam by the underbeam of reaction frame, fixing and moving for hydraulic means, and to have equally by centre to the scale of both sides for determining the position of hydraulic means.
Hydraulic means comprises top hydraulic jack 2 and lower hydraulic lifting jack 8, for the applying of concrete or reinforced concrete member load, top hydraulic jack is fixed on the lower surface sliding rail of reaction frame upper beam, quantity is 2 or more, lower hydraulic lifting jack is fixed on reaction frame underbeam upper surface slide track, quantity is 2 or more, can according to the load situation movement hydraulic device of realistic simulation to precalculated position.
Pressure transducer is connected at the bottom of each hydraulic means top, passes to the pressure of concrete or reinforced concrete member for the real time measure hydraulic means.
Sliding rail 3 is divided into and gets on the right track and lower railway, fixing and mobile for hydraulic means, and make in process of the test, what hydraulic means can be stable moves to preposition; Get on the right track and be positioned at the lower surface of reaction frame upper beam, lower railway is positioned at the upper surface of reaction frame upper beam, scoops out be connected as a single entity reliably with the chain of reaction frame.
Camera occurs with crack on each face of recording member for observing, the process of development, camera is furnished with the track for fixing and dollying head, distribution is positioned at the forward and backward of component, wherein two cameras are used for forward and backward of observation component, two outer two then for observation component upper surface and lower surface, camera can be moved to the position wanting to observe by track, and can move around, camera is connected with robot calculator, and robot calculator is passed in record.
Lime bucket is used for holding lime, and lime brush is used for each surface lime being painted on test component so that the better generation in observation component crack, evolution.
Computing machine for recording the video recording of process of the test and gathering the data of motor speed, and processes data, comprehensively record concrete or the reinforced concrete member overall process that crack occurs, develops in destructive process, and is shown by display.
Instrument of the present invention on the upside of reaction frame, downside all arranges transportable hydraulic means, for meeting the load needs of Different Loading Method; The present invention for research object can be rule or the component of irregular section; Camera is all equipped with independently moving track, can move to as required and need observation position, also can set the observation also real time record crack progressing situation that moves around; In test, operating personnel can arrange baffle plate in reaction frame front and back, in order to avoid component damage jumps out fragment produce injury to personnel; Lime in lime bucket should be brushed before test is carried out, and upper, forward and backward, below all brush, carry out again loading and observation experiment after lime drying.
The present invention provides load by hydraulic means, utilize multiple dollying head take pictures in real time observation and record crack occur and development process.The present invention can overcome manpower the real-time comprehensive crack that has been difficult to occur, the observation of development and record, can comparatively comprehensively with under real record and the effect of observation concrete component outer load, the generation in each orientation, each several part crack and evolution, other disturbing factors of effective eliminating, have more directive significance and using value to Practical Project.
Claims (8)
1. the experimental provision observing distress in concrete that development occurs, it is characterized in that, comprise the reaction frame (1) arranged in framed structure, bearing dress sample platform (6) for fixing test beam (5) is provided with in reaction frame (1), the upper and lower side of bearing dress sample platform (6) is provided with the hydraulic means for exerting pressure to test beam (5), the upper beam of bearing dress sample platform (6) and underbeam are provided with sliding rail (3), hydraulic means can be mobile along sliding rail (3), described bearing dress sample platform (6) is provided with and can monitors the camera (4) that evolution occurs in crack, camera (4) is connected to computing machine (11), described bearing dress sample platform (6) is provided with lime brush (9) and lime bucket (10).
2. a kind of experimental provision observing distress in concrete that development occurs according to claim 1, it is characterized in that, described hydraulic means comprises the top hydraulic jack (2) of the upper end being arranged on bearing dress sample platform (6), and be arranged on the lower hydraulic lifting jack (8) that bearing fills the lower end of sample platform (6), hydraulic jack (2) one end, described top and bearing fill sample platform (6) upper end and are connected, the other end is connected with the upper beam of reaction frame (1), described lower hydraulic lifting jack (8) one end fills sample platform (6) lower end with bearing and is connected, the other end is connected with the underbeam of reaction frame (1).
3. a kind of experimental provision observing distress in concrete that development occurs according to claim 2, it is characterized in that, the upper beam of described bearing dress sample platform (6) and underbeam are provided with the scale graticule for determining top hydraulic jack (2) and lower hydraulic lifting jack (8) position, centre position is zero graduation line.
4. a kind of experimental provision observing distress in concrete that development occurs according to claim 3, it is characterized in that, described top hydraulic jack (2) and lower hydraulic lifting jack (8) are provided with motor, motor is connected to computing machine (11), and top hydraulic jack (2) and lower hydraulic lifting jack (8) can be mobile along sliding rail (3) under the driving of motor.
5. a kind of experimental provision observing distress in concrete that development occurs according to claim 4, it is characterized in that, described top hydraulic jack (2) and lower hydraulic lifting jack (8) are provided with pressure transducer, and pressure transducer is connected to computing machine (11).
6. a kind of experimental provision observing distress in concrete that development occurs according to claim 5, it is characterized in that, described top hydraulic jack (2) and the quantity of lower hydraulic lifting jack (8) are at least two.
7. a kind of experimental provision observing distress in concrete that development occurs according to claim 1, it is characterized in that, six positions of the upper corresponding test beam (5) six of described bearing dress sample platform (6) are provided with camera (4).
8. a kind of experimental provision observing distress in concrete that development occurs according to claim 7, it is characterized in that, six positions of the upper corresponding test beam (5) six of described bearing dress sample platform (6) are provided with camera track (7), (4) arrange drive motor to camera, drive motor is connected to computing machine (11), and drive motor can drive camera (4) mobile along camera track (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510937020.6A CN105445099A (en) | 2015-12-14 | 2015-12-14 | Experiment apparatus for observing generation and development of concrete cracks |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510937020.6A CN105445099A (en) | 2015-12-14 | 2015-12-14 | Experiment apparatus for observing generation and development of concrete cracks |
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| CN105445099A true CN105445099A (en) | 2016-03-30 |
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| CN201510937020.6A Pending CN105445099A (en) | 2015-12-14 | 2015-12-14 | Experiment apparatus for observing generation and development of concrete cracks |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727836A (en) * | 2017-11-27 | 2018-02-23 | 招商局重庆交通科研设计院有限公司 | Tunnel Lining Cracks determination experiment device and method containing sprayed coating |
| CN108051314A (en) * | 2017-12-01 | 2018-05-18 | 长安大学 | The experimental rig of the lower asphalt pavement crack of various factors coupling effect and fracture development |
| CN109490187A (en) * | 2019-01-16 | 2019-03-19 | 徐州工业职业技术学院 | Bituminous concrete crack self-healing simulation testing instrument |
| CN110426287A (en) * | 2019-07-16 | 2019-11-08 | 中国民航大学 | A kind of multifunctional material crackle generates and observation device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008046086A (en) * | 2006-08-21 | 2008-02-28 | Kagawa Univ | Water penetration test machine and water penetration test method |
| CN102645527A (en) * | 2012-04-12 | 2012-08-22 | 长安大学 | Asphalt mixture fatigue test method based on DCT (Disk-Shaped Compact Tension) and HD (High Definition) imaging technology |
| CN203490131U (en) * | 2013-10-22 | 2014-03-19 | 安徽理工大学 | Pressurizing device for anchor rod drawing experiment for simulating anchorage body surrounding rock stress |
| CN104535427A (en) * | 2014-12-12 | 2015-04-22 | 广西科技大学 | Static loading testing method of continuous beam |
| CN104596861A (en) * | 2015-01-16 | 2015-05-06 | 重庆大学 | Visual tri-axial testing machine |
| CN104614247A (en) * | 2015-01-16 | 2015-05-13 | 重庆大学 | Visualized triaxial test system |
| CN204389300U (en) * | 2015-02-03 | 2015-06-10 | 重庆科技学院 | A kind of pressure testing machine with slidably coupling arrangement |
| CN105058334A (en) * | 2015-07-17 | 2015-11-18 | 河海大学 | Jack support capable of sliding horizontally and earthquake resistance static test system |
| CN205228940U (en) * | 2015-12-14 | 2016-05-11 | 榆林学院 | Experimental device for survey concrete crack take place development |
-
2015
- 2015-12-14 CN CN201510937020.6A patent/CN105445099A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008046086A (en) * | 2006-08-21 | 2008-02-28 | Kagawa Univ | Water penetration test machine and water penetration test method |
| CN102645527A (en) * | 2012-04-12 | 2012-08-22 | 长安大学 | Asphalt mixture fatigue test method based on DCT (Disk-Shaped Compact Tension) and HD (High Definition) imaging technology |
| CN203490131U (en) * | 2013-10-22 | 2014-03-19 | 安徽理工大学 | Pressurizing device for anchor rod drawing experiment for simulating anchorage body surrounding rock stress |
| CN104535427A (en) * | 2014-12-12 | 2015-04-22 | 广西科技大学 | Static loading testing method of continuous beam |
| CN104596861A (en) * | 2015-01-16 | 2015-05-06 | 重庆大学 | Visual tri-axial testing machine |
| CN104614247A (en) * | 2015-01-16 | 2015-05-13 | 重庆大学 | Visualized triaxial test system |
| CN204389300U (en) * | 2015-02-03 | 2015-06-10 | 重庆科技学院 | A kind of pressure testing machine with slidably coupling arrangement |
| CN105058334A (en) * | 2015-07-17 | 2015-11-18 | 河海大学 | Jack support capable of sliding horizontally and earthquake resistance static test system |
| CN205228940U (en) * | 2015-12-14 | 2016-05-11 | 榆林学院 | Experimental device for survey concrete crack take place development |
Non-Patent Citations (1)
| Title |
|---|
| 徐善华 等: ""锈蚀钢筋混凝土简支梁斜截面抗剪性能研究"", 《建筑结构学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727836A (en) * | 2017-11-27 | 2018-02-23 | 招商局重庆交通科研设计院有限公司 | Tunnel Lining Cracks determination experiment device and method containing sprayed coating |
| CN108051314A (en) * | 2017-12-01 | 2018-05-18 | 长安大学 | The experimental rig of the lower asphalt pavement crack of various factors coupling effect and fracture development |
| CN109490187A (en) * | 2019-01-16 | 2019-03-19 | 徐州工业职业技术学院 | Bituminous concrete crack self-healing simulation testing instrument |
| CN110426287A (en) * | 2019-07-16 | 2019-11-08 | 中国民航大学 | A kind of multifunctional material crackle generates and observation device |
| CN110426287B (en) * | 2019-07-16 | 2021-08-24 | 中国民航大学 | Multifunctional material crack generation and observation device |
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Application publication date: 20160330 |
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