CN102778389B - Concrete test loading device and test method under load and multifactor coupling - Google Patents
Concrete test loading device and test method under load and multifactor coupling Download PDFInfo
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- CN102778389B CN102778389B CN201210220051.6A CN201210220051A CN102778389B CN 102778389 B CN102778389 B CN 102778389B CN 201210220051 A CN201210220051 A CN 201210220051A CN 102778389 B CN102778389 B CN 102778389B
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Abstract
The invention aims to provide a concrete test loading device and a test method under load and multifactor coupling. The concrete test loading device comprises a press machine, a fixture, a sensor component and a test piece box, wherein a concrete test piece and the sensor component are mounted in the fixture; the fixture is mounted in the press machine; and the test piece box is sleeved on the exterior of the press machine. According to the concrete test loading device and the test method, the structure is simple, the operation is convenient, real working conditions of a concrete member under the combined action of stress and chemical erosion, drying and watering cycle or freezing and thawing cycle in an actual project can be simulated, so that data measured in a laboratory is enabled to have high value of reference on projects.
Description
Technical field
What the present invention relates to is a kind of test unit and test method, specifically concrete test unit and test method.
Background technology
The concrete deterioration failure result of multiple damage factors coupling normally in Practical Project, according to single factors, effect is researched and analysed Durability of Concrete to be difficult to accurate response engineering actual.Therefore, set up the multifactor coupling test method under Reality simulation environment-stress state, deterioration law failure mechanism and the safeguard procedures tool of studying concrete performance under multifactor coupling are of great significance.
Relevant for concrete durability experiment charger under compressive stress and the coupling of many factors, similarly design both at home and abroad at present, and have the bibliographical information for this technical research and analysis, as the device of Chinese Water Conservancy research institute is subject to the device of bending stress for studying concrete, employing is answered torque wrench to twist nut and is loaded to test specimen, and it is well-known, concrete in tension ultimate bearing capacity is approximately 1/20 of pressurized ultimate bearing capacity, if this device changes into pressurized concrete and loads, it is large many that the power that nut is subject to is wanted, thereby often tightening nut will inevitably make thread abrasion reduce device serviceable life and test accuracy, Harbin Institute of Technology's Zou Chao English announced a set of for pressurized Concrete Design device, for just in time being put in the supporting test specimen box of existing fast freeze-thaw circulator, whole fixture and test specimen use, the area of pressing plate is designed to the area of section (square of lOOmm * 100mm) of standard specimen, and test specimen has adopted non-standard component (cross section is the circle of φ 100), thereby utilize unnecessary space to lay pull bar, so pull bar restricted diameter system, consequently or the high but not re-usable high-strength bolt of working strength, be only applicable to the pressurized concrete sample that design strength is lower, China patent of invention CN101979990A announced a set of can one the device of the corresponding a plurality of fixtures of charger, reduced cost, but it is still only applicable to be subject to curved test specimen, the screw thread while changing pressurized test specimen on its charger place screw rod still can produce larger wearing and tearing, China patent of invention CN2449222Y has announced a kind of in-situ compressor, and it mainly loads to the brick setting of putting in the inner by the interaction of lifting jack, high-strength pull bar and upper and lower two steel plates, thereby realizes the effect of measuring at the scene masonry compression strength.But it is only the field measurement apparatus for masonry compression strength, with concrete durability load test irrelevant.
Summary of the invention
The object of the present invention is to provide convenient operation and be suitable for concrete test charger and test method under pressurized, the load that is subject to curved and the coupling of many factors and the coupling of many factors at the same time.
The object of the present invention is achieved like this:
Concrete test charger under load of the present invention and the coupling of many factors, it is characterized in that: comprise pressing machine, fixture, sensor module, test specimen box, concrete sample and sensor module are arranged in fixture, and fixture is arranged in pressing machine, and test specimen box is enclosed within pressing machine outside, pressing machine comprises pressing machine top board, pressing machine lower platen, press machine draw bar, lifting jack, press machine draw bar is arranged between pressing machine top board and pressing machine lower platen, lifting jack is arranged on pressing machine lower platen, the first circular metal sleeve is set on pressing machine top board, the second circular metal sleeve is set on lifting jack, fixture main clamp and side fixture, main clamp comprises main clamp top board, main clamp lower platen, main clamp pull bar, main clamp pull bar is arranged between main clamp top board and main clamp lower platen, the first becket matching with the first circular metal sleeve is set on main clamp top board, the second becket matching with the second circular metal sleeve is set on main clamp lower platen, side fixture comprises side fixture left pressing plate, the right pressing plate of side fixture, side clamp pull rod, side clamp pull rod is arranged between side fixture left pressing plate and the right pressing plate of side fixture, it is two semicolumn bonding jumpers of 10cm that first group of distance is set on side fixture left pressing plate, it is two semicolumn bonding jumpers of 30cm that second group of distance is set on the right pressing plate of side fixture, top board and the lower platen of main clamp is close in the upper and lower end face of concrete sample, left pressing plate and the right pressing plate of side fixture is close in two sides of concrete sample, sensor module comprises sensor stand, sensor, and sensor is arranged between fixture top board and fixture lower platen by sensor stand.
Concrete test method under load of the present invention and the coupling of many factors, adopt concrete test charger under load of the present invention and the coupling of many factors, it is characterized in that: by four-point bending test standard, at the corresponding stressed place of concrete sample, draw mark, make in side fixture respective token place on the semicolumn bonding jumper on left pressing plate and right pressing plate and concrete sample be in contact with one another, fixation side clamp pull rod makes the bending stress that is subject to of concrete sample reach its experiment design load, concrete sample is put into main clamp middle position, by fixture, concrete sample integral body is put into pressing machine, operation lifting jack makes main clamp be loaded into design load, fixedly main clamp pull bar is laid down the pressure of lifting jack, again with lifting jack, be loaded into the pressure that the later fastening nut of sensor reading generation inverse change is laid down lifting jack again, repeat said process until after laying down the pressure of lifting jack sensor reading the same with the reading before loading for the first time, then integral body shifts out pressing machine, take off sensor, at main clamp pull bar and main clamp pressing plate, side clamp pull rod and side fixture pressing plate contact position are coated with one deck fluid sealant, last integral body moves on to outdoorly carries out exposure test or puts into corresponding test specimen box, all put into again fast freeze-thaw circulation testing machine and carry out fast freeze-thaw cyclic test, during unloading, slice off the fluid sealant on main clamp and side fixture, then main clamp is put back in pressing machine, then operate lifting jack and make main clamp be loaded into design load, releasing lever pressure, then concrete sample and side fixture integral body are shifted out to pressing machine, take out concrete sample.
The present invention can also comprise:
While 1, carrying out exposure test, set open-assembly time interval, every through one open-assembly time interval rear jig repeat once to unload and load the process of concrete sample.
Advantage of the present invention is: the present invention is simple in structure, easy to operate, can simulate stress in Practical Project, chemical erosion, drying and watering cycle or freeze thawing circulation acting in conjunction in the real working condition of concrete component, thereby make the data that laboratory records have more project reference value:
1, loaded, the test specimen behind fixture location both can carry out atmospheric exposure test, also can coordinate corresponding test specimen box to carry out indoor fast freeze-thaw cyclic test.
2, when coordinating corresponding test specimen box to carry out indoor fast freeze-thaw cyclic test, can support the use with existing fast freeze-thaw circulator.
3, can a while pressurized be provided, be subject to the experimental situation curved and coupling of many factors test specimen.
4, because pull bar diameter is unrestricted, thus fixture limit holding capacity can increase to a certain extent, thereby can be suitable for and the test specimen that has the design of high strength more.
When 5, fixture loads by control and the rectification of pressing machine and sensor, increased loading accuracy, and pressing machine and sensor can corresponding a plurality of fixtures, so that regularly adjust fixture, prevent that bar stress is lax, and avoided pressing machine and sensor corroded by objectionable impurities, thereby improved equipment service efficiency, reduced cost.
Accompanying drawing explanation
Fig. 1 is the outward appearance skeleton view of concrete test charger under load of the present invention and the coupling of many factors;
Fig. 2 is the outward appearance skeleton view of pressing machine in concrete test charger under load of the present invention and the coupling of many factors;
Fig. 3 is the front elevation view of pressing machine in concrete test charger under load of the present invention and the coupling of many factors;
Fig. 4 is the outward appearance skeleton view of side fixture in concrete test charger under load of the present invention and the coupling of many factors;
Fig. 5 is the front elevation view of side fixture in concrete test charger under load of the present invention and the coupling of many factors;
Fig. 6 is the outward appearance skeleton view of main clamp side fixture and concrete sample in concrete test charger under load of the present invention and the coupling of many factors;
Fig. 7 is the front elevation view of concrete test charger side fixture and concrete sample under load of the present invention and the coupling of many factors;
Fig. 8 is the outward appearance skeleton view of test specimen box in concrete test charger under load of the present invention and the coupling of many factors;
Fig. 9 is the front elevation view of test specimen box part in concrete test charger under load of the present invention and the coupling of many factors;
Figure 10 is the assembly structure schematic diagram of sensor module in concrete test charger under load of the present invention and the coupling of many factors.
Embodiment
Below in conjunction with accompanying drawing, for example the present invention is described in more detail:
In conjunction with Fig. 1～10, under load of the present invention and the coupling of many factors, concrete test charger is comprised of pressing machine 1, main clamp 2, test specimen box 3, sensor module 4,5 five parts of side fixture.Below in conjunction with accompanying drawing, the connected mode of all parts of the present invention and effect thereof are described below:
Pressing machine 1 comprises a next pressing plate 7 of top board 6,, and lower platen 7 central authorities are placed with separated type hydraulic jack 10, two pressing plates and connect (referring to Fig. 2) by four pull bars 9 and 8 nuts 8; Main clamp 2 comprises that two the same pressing plate 15, two pressing plates connect (referring to Fig. 6) by four pull bars 17 and 8 nuts 18; Side fixture 5 comprises that 13, one right pressing plate 12, two pressing plates of a left pressing plate are connected by four lower link bars 11 and 8 little nuts 14; Sensor module 4 is comprised of a sensor stand 21 and clock gauge or sensor 20.
The upper lower platen 5 and 7 of pressing machine 1 is made for rectangular metal sheet material of the same area, the upper lower platen 6 and 7 of pressing machine 1 is made for rectangular metal sheet material of the same area, two relevant position, four angles of pressing plate are all made with the duct of perforation, and top board 6 central authorities are fixed with a circular metal sleeve.(referring to Fig. 2, Fig. 3).In main clamp 2, two the same upper lower platens 15 are made for rectangular metal sheet material of the same area, two relevant position, four angles of pressing plate are all made with the duct of perforation, two pressing plates 6 of the Area Ratio pressing machine 1 of main clamp 2 pressing plates 15 and 7 area are little, and in one surface, are also provided with four screws.(referring to Fig. 6, Fig. 7).The left and right pressing plate 13 and 12 of side fixture 5 is made for rectangular metal sheet material of the same area, two relevant position, four angles of pressing plate are all made with the duct of perforation, on one surperficial middle position of left pressing plate 13, be fixed with two semicolumn bonding jumpers parallel with rectangular metal plate minor face, two bonding jumpers are at a distance of 10cm, on one surperficial middle position of right pressing plate 12, be fixed with two semicolumn bonding jumpers parallel with rectangular metal plate minor face, two bonding jumpers are at a distance of 30cm.Pull bar 9,17 and lower link bar 11 are cylindrical pull bar, the equal car in two ends has screw thread, its screw thread respectively with nut 8,18 and little nut 14 on screw thread match, the get on the bus maximum gauge of threaded portion of pull bar is more smaller than not having the diameter in cutting thread region, the difference of pull bar diameter has formed a step, thereby makes the top board of pressing machine 1 or main clamp 2 can not lower along pull bar idle time (referring to Fig. 2).Test specimen box 3 is that the floorage of groove is slightly larger than the rectangular area of pressing plate 15, any value (referring to Fig. 8, Fig. 9) in the high desirable 41-53cm of groove by the hexahedron groove of electroplating the upper open-ended that iron sheet or corrosion resistant plate or rubber slab make.Sensor stand 21 main bodys are a square tube, its bottom is fixed in a rectangular metal plate, sheet metal all has circular hole on four angles, size and the position consistency of circular hole size and position and main clamp 2 center platen 15 surperficial screws, the outwardly part of square tube top-side makes it be from the side inverted "L" shaped, and projection is solid metal system, and its upper surface is provided with a duct connecting downwards, side surface is provided with a threaded perforation duct, and duct is provided with bolt 22(referring to Figure 10).
Concrete test method under load of the present invention and the coupling of many factors:
During use, first by four-point bending test standard, at the corresponding stressed place of concrete sample 19, draw mark, make in side fixture 5 respective token place on the semicolumn bonding jumper on left pressing plate 13 and right pressing plate 12 and concrete sample 19 be in contact with one another, lower link bar 11 and little nut 14 are loaded onto in four angles of two side guides, using torque spanner to tighten little nut 14 makes the bending stress that is subject to of concrete sample 19 reach its experiment design load, afterwards concrete sample 19 is put into main clamp 2 middle positions, circular hole on four angles of sensor stand 21 bottom metal is alignd with four screws on main clamp 2 center platen 15 surfaces, the screw of screwing on is fixed both, the duct of the perforation of sensor stand upper surface is inserted on one side of clock gauge or sensor 20 non-contacts, another side contacts with another pressing plate 15 in main clamp 2, after 22, above integral body is put into pressing machine 1 tighting a bolt, then operate oil pump and drive separated type hydraulic jack 10, make main clamp 2 be loaded into design load, after fastening nut 18, lay down the pressure of lifting jack 10, the reading of observing clock gauge or sensor 20 changes, again with lifting jack 10, be loaded into the pressure that fastening nut 18 after clock gauge or sensor 20 reading generation inverse change is laid down lifting jack 10 again, repeat this process repeatedly only the same with the reading before loading for the first time to laying down after the pressure of lifting jack 10 clock gauge or sensor 20 readings, then integral body shifts out pressing machine 1, take off clock gauge or sensor 20, at pull bar 17 and nut 18, lower link bar 11 and little nut 14 contact positions are coated with one deck fluid sealant, last integral body can move on to the outdoor exposure test of carrying out, also can put into corresponding test specimen box 3, all put into again fast freeze-thaw circulation testing machine and carry out fast freeze-thaw cyclic test, during unloading, with instrument, slice off the fluid sealant on main clamp 2 and side fixture 5, again main clamp 2 is put back in pressing machine 1, then operate oil pump and drive separated type hydraulic jack 10, make main clamp 2 be loaded into design load, unscrew the pressure of laying down lifting jack 10 after nut 18, again concrete sample 19 and side fixture 5 integral body are shifted out to pressing machine 1, with spanner, unscrew the little nut 14 on side fixture 5, take out concrete sample 19.While carrying out exposure test, every exposure a period of time main clamp 2 and side fixture 5 will repeat the process that once unloads and load, and if any place, occur that corrosion sign will timely painting.
Claims (3)
1. concrete test charger under load and the coupling of many factors, it is characterized in that: comprise pressing machine, fixture, sensor module, test specimen box, concrete sample and sensor module are arranged in fixture, and fixture is arranged in pressing machine, and test specimen box is enclosed within pressing machine outside, pressing machine comprises pressing machine top board, pressing machine lower platen, press machine draw bar, lifting jack, press machine draw bar is arranged between pressing machine top board and pressing machine lower platen, lifting jack is arranged on pressing machine lower platen, the first circular metal sleeve is set on pressing machine top board, the second circular metal sleeve is set on lifting jack, fixture comprises main clamp and side fixture, main clamp comprises main clamp top board, main clamp lower platen, main clamp pull bar, main clamp pull bar is arranged between main clamp top board and main clamp lower platen, the first becket matching with the first circular metal sleeve is set on main clamp top board, the second becket matching with the second circular metal sleeve is set on main clamp lower platen, side fixture comprises side fixture left pressing plate, the right pressing plate of side fixture, side clamp pull rod, side clamp pull rod is arranged between side fixture left pressing plate and the right pressing plate of side fixture, side fixture left pressing plate and the right pressing plate of side fixture are rectangular metal plate of the same area, it is two semicolumn bonding jumpers of 10cm that first group of distance is set on side fixture left pressing plate, first group of semicolumn bonding jumper is fixed on a surperficial middle position of side fixture left pressing plate, and parallel with rectangular metal plate minor face, it is two semicolumn bonding jumpers of 30cm that second group of distance is set on the right pressing plate of side fixture, second group of semicolumn bonding jumper is fixed on a surperficial middle position of the right pressing plate of side fixture, and parallel with rectangular metal plate minor face, top board and the lower platen of main clamp is close in the upper and lower end face of concrete sample, left pressing plate and the right pressing plate of side fixture is close in two sides of concrete sample, sensor module comprises sensor stand, sensor, and sensor is arranged between main clamp top board and main clamp lower platen by sensor stand.
2. concrete test method under load and the coupling of many factors, adopt concrete test charger under load claimed in claim 1 and the coupling of many factors, it is characterized in that: by four-point bending test standard, at the corresponding stressed place of concrete sample, draw mark, make in side fixture respective token place on the semicolumn bonding jumper on left pressing plate and right pressing plate and concrete sample be in contact with one another, fixation side clamp pull rod makes the bending stress that is subject to of concrete sample reach its experiment design load, concrete sample is put into main clamp middle position, by fixture, concrete sample integral body is put into pressing machine, operation lifting jack makes main clamp be loaded into design load, fixedly main clamp pull bar is laid down the pressure of lifting jack, again with lifting jack, be loaded into the pressure that the later fastening nut of sensor reading generation inverse change is laid down lifting jack again, repeat said process until after laying down the pressure of lifting jack sensor reading the same with the reading before loading for the first time, then integral body shifts out pressing machine, take off sensor, at main clamp pull bar and main clamp top board and main clamp lower platen, side clamp pull rod and side fixture top board and side fixture lower platen contact position are coated with one deck fluid sealant, last integral body moves on to outdoorly carries out exposure test or puts into corresponding test specimen box, all put into again fast freeze-thaw circulation testing machine and carry out fast freeze-thaw cyclic test, during unloading, slice off the fluid sealant on main clamp and side fixture, again main clamp is put back in pressing machine, then operated lifting jack and make main clamp be loaded into design load, unclamp main clamp pull bar pressure, again concrete sample and side fixture integral body are shifted out to pressing machine, take out concrete sample.
3. concrete test method under load according to claim 2 and the coupling of many factors, it is characterized in that: while carrying out exposure test, set open-assembly time interval, every through one open-assembly time interval rear jig repeat once to unload and load the process of concrete sample.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210220051.6A CN102778389B (en) | 2012-06-29 | 2012-06-29 | Concrete test loading device and test method under load and multifactor coupling |
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| CN201210220051.6A CN102778389B (en) | 2012-06-29 | 2012-06-29 | Concrete test loading device and test method under load and multifactor coupling |
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| CN102778389A CN102778389A (en) | 2012-11-14 |
| CN102778389B true CN102778389B (en) | 2014-07-30 |
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