CN102778389A - 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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- CN102778389A CN102778389A CN2012102200516A CN201210220051A CN102778389A CN 102778389 A CN102778389 A CN 102778389A CN 2012102200516 A CN2012102200516 A CN 2012102200516A CN 201210220051 A CN201210220051 A CN 201210220051A CN 102778389 A CN102778389 A CN 102778389A
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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
Concrete deterioration failure multiple-disruption factor coupling action result normally in the actual engineering, effect is researched and analysed the concrete durability problem to be difficult to the accurate response engineering actual according to single factors.Therefore, set up the multifactor coupling test method under simulation true environment-stress state, deterioration law failure mechanism and the safeguard procedures of studying concrete performance under the multifactor coupling have crucial meaning.
At present both at home and abroad relevant for concrete durability experiment charger similar design under compressive stress and the coupling of many factors, and the bibliographical information for this technical research and analysis is arranged; Receive the device of bending stress for the research concrete like the device of Chinese Water Conservancy research institute; Employing is answered torque wrench to twist nut and is loaded to test specimen; And well-known, the concrete in tension ultimate bearing capacity is approximately 1/20 of pressurized ultimate bearing capacity, if this device changes into to the pressurized concrete and loads; It is big many that the power that nut receives is wanted, thereby often the degree of tightness nut will inevitably make thread abrasion reduce device serviceable life and test accuracy; Harbin Institute of Technology Zou Chao English announced a cover to the design of pressurized concrete device; For make whole anchor clamps and test specimen just in time can put into existing fast freeze-thaw circulator use in the supporting test specimen box; With the area design of pressing plate is 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 utilizes 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, or be only applicable to the lower pressurized concrete sample of design strength; China patent of invention CN101979990A has announced the device that a cover can the corresponding a plurality of anchor clamps of charger; Reduced cost; But it still is only applicable to receive curved test specimen, and the screw thread when changing the pressurized test specimen on its charger place screw rod still can produce bigger wearing and tearing; China patent of invention CN2449222Y has announced a kind of original position pressing machine, and it mainly reaches the interaction of two steel plates up and down through lifting jack, high-strength pull bar and loads for the brick setting that places in it, thereby is implemented in the effect of in-site measurement masonry compression strength.But it only is the field measurement apparatus for masonry compression strength, with concrete durability load test and irrelevant.
Summary of the invention
The object of the present invention is to provide and be convenient to operate and be suitable for concrete test charger and test method under pressurized, the load that receives curved and the coupling of many factors and the coupling of many factors at the same time.
The objective of the invention is to realize 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, anchor clamps, sensor module, test specimen box; Concrete sample and sensor module are installed in the anchor clamps, and anchor clamps are installed in the pressing machine, and the test specimen box is enclosed within the 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 installed between pressing machine top board and the pressing machine lower platen; Lifting jack is installed on the pressing machine lower platen; The first circular metal sleeve is set on the pressing machine top board, the second circular metal sleeve is set on the lifting jack; Anchor clamps master anchor clamps and side anchor clamps; Main anchor clamps comprise main anchor clamps top board, main anchor clamps lower platen, main clamp pull rod; Main clamp pull rod is installed between main anchor clamps top board and the main anchor clamps lower platen; First becket that matches with the first circular metal sleeve is set on the main anchor clamps top board; Second becket that matches with the second circular metal sleeve is set on the main anchor clamps lower platen, and the side anchor clamps comprise side anchor clamps left pressing plate, the right pressing plate of side anchor clamps, side clamp pull rod, and the side clamp pull rod is installed between side anchor clamps left pressing plate and the right pressing plate of side anchor clamps; First group of distance is set on the side anchor clamps left pressing plate is two semicolumn bonding jumpers of 10cm; On the right pressing plate of side anchor clamps second group of distance is set and is two semicolumn bonding jumpers of 30cm, the top board and the lower platen of main anchor clamps is close in the upper and lower end face of concrete sample, and the left pressing plate and the right pressing plate of side anchor clamps are close in two sides of concrete sample; Sensor module comprises sensor stand, sensor, and sensor is installed between anchor clamps top board and the anchor clamps lower platen through 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: draw mark at the corresponding stressed place of concrete sample by the four-point bending test standard; Make in the side anchor clamps that the respective token place is in contact with one another on the semicolumn bonding jumper on the left pressing plate and right pressing plate and concrete sample, the fixation side clamp pull rod makes the bending stress that receives of concrete sample reach its experiment design load, and concrete sample is put into main anchor clamps middle position; Anchor clamps, concrete sample integral body are put into pressing machine; The operation lifting jack makes main anchor clamps be loaded into design load, and fixing main clamp pull rod is laid down the pressure of lifting jack, is loaded into the pressure that the later fastening nut of sensor reading generation inverse change is laid down lifting jack with lifting jack again again; It is the same to repeat said process reading before sensor reading and the loading for the first time behind the pressure of laying down lifting jack; Integral body shifts out pressing machine then, takes off sensor, is coated with one deck fluid sealant at main clamp pull rod and main anchor clamps pressing plate, side clamp pull rod and side anchor clamps pressing plate contact position; Last integral body moves on to the outdoor test specimen box that carries out exposure test or put into correspondence, all puts into fast freeze-thaw cyclic test machine again and carries out the fast freeze-thaw cyclic test; Slice off the fluid sealant on main anchor clamps and the side anchor clamps during unloading, more main anchor clamps are put back in the pressing machine, operate lifting jack then and make main anchor clamps be loaded into design load, releasing lever pressure shifts out pressing machine with concrete sample and side anchor clamps integral body again, takes out concrete sample.
The present invention can also comprise:
When 1, carrying out exposure test, set exposure duration at interval, every through an exposure duration at 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 the actual engineering, chemical erosion, drying and watering cycle or freeze thawing circulation acting in conjunction in the real working condition of concrete component, thereby the data that the laboratory is recorded have more project reference value:
1, load completion, the test specimen behind the anchor clamps location both can carry out atmospheric exposure test, also can cooperate corresponding test specimen box to carry out indoor fast freeze-thaw cyclic test.
2, when cooperating corresponding test specimen box to carry out indoor fast freeze-thaw cyclic test, can with the supporting use of existing fast freeze-thaw circulator.
3, can a while pressurized be provided to test specimen, receive the curved experimental situation that reaches the coupling of many factors.
4, because the pull bar diameter is unrestricted, thus anchor clamps limit holding capacity can increase to a certain extent, thereby the test specimen that can be suitable for and have high strength more to design.
When 5, anchor clamps load by the control and the rectification of pressing machine and sensor; Increased loading accuracy, and pressing machine and sensor can corresponding a plurality of anchor clamps, so that regularly adjust anchor clamps; Prevent that bar stress is lax; And avoided pressing machine and sensor corroded by objectionable impurities, thereby improved the equipment service efficiency, reduced cost.
Description of drawings
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 the 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 the 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 anchor clamps in the concrete test charger under load of the present invention and the coupling of many factors;
Fig. 5 is the front elevation view of side anchor clamps in the 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 chuck side anchor clamps and concrete sample in the 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 anchor clamps 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 the 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 spare in the concrete test charger under load of the present invention and the coupling of many factors;
Figure 10 is the assembly structure synoptic diagram of sensor module in the concrete test charger under load of the present invention and the coupling of many factors.
Embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1～10, the concrete test charger is made up of pressing machine 1, main anchor clamps 2, test specimen box 3, sensor module 4,5 five parts of side anchor clamps under load of the present invention and the coupling of many factors.Below in conjunction with accompanying drawing the connected mode and the effect thereof of each parts of the present invention are set forth as follows:
Pressing machine 1 comprises a top board 6, one next pressing plates 7, and lower platen 7 central authorities are placed with separate type hydraulic jack 10, two pressing plates and connect (referring to Fig. 2) by four pull bars 9 and 8 nuts 8; Main anchor clamps 2 comprise 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 anchor clamps 5 comprise 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 made up of a sensor stand 21 and clock gauge or sensor 20.
The last lower platen 5 and 7 of pressing machine 1 is processed for rectangular metal sheet material of the same area; The last lower platen 6 and 7 of pressing machine 1 is processed for rectangular metal sheet material of the same area; The duct that perforation is all done in relevant position, four angles of two pressing plates, top board 6 central authorities are fixed with a circular metal sleeve.(referring to Fig. 2, Fig. 3).Two the same last lower platens 15 are processed for rectangular metal sheet material of the same area in the main anchor clamps 2; The duct that perforation is all done in relevant position, four angles of two pressing plates; Two pressing plates 6 of the area specific pressure machine 1 of main anchor clamps 2 pressing plates 15 and 7 area are little, and also are provided with four screws on the one surface.(referring to Fig. 6, Fig. 7).The left and right sides pressing plate 13 and 12 of side anchor clamps 5 is processed for rectangular metal sheet material of the same area; The duct that perforation is all done in relevant position, four angles of two pressing plates; Be fixed with two semicolumn bonding jumpers parallel on the one surperficial middle position of left pressing plate 13 with the rectangular metal plate minor face; Two bonding jumpers are fixed with two semicolumn bonding jumpers parallel with the rectangular metal plate minor face at a distance of 10cm on the one surperficial middle position of right pressing plate 12, 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 be complementary; The get on the bus maximum gauge of threaded portion of pull bar is more smaller than the diameter that does not have cutting thread zone, and the difference of pull bar diameter has formed a step, thereby makes the top board of pressing machine 1 or main anchor clamps 2 idle the time, can not lower along pull bar (referring to Fig. 2).Test specimen box 3 is that the floorage of groove is bigger slightly than the rectangular area of pressing plate 15 by the hexahedron groove of electroplating the last open-ended that iron sheet or corrosion resistant plate or rubber slab process, and any one is worth (referring to Fig. 8, Fig. 9) in the high desirable 41-53cm of groove.Sensor stand 21 main bodys are a square tube, and its bottom is fixed on the rectangular metal plate, and sheet metal all has circular hole on four angles; The size and the position consistency of circular hole size and position and main anchor clamps 2 center platens 15 surperficial screws; The square tube top-side is outwards protruded a part to be seen it to be down " L " type from the side, and projection is a solid metal system, and its upper surface is provided with the duct that connects downwards; Side surface is provided with a threaded perforation duct, and the 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:
Earlier draw mark by the four-point bending test standard at the corresponding stressed place of concrete sample 19 during use, make in the side anchor clamps 5 that the respective token place is in contact with one another on the semicolumn bonding jumper on the left pressing plate 13 and right pressing plate 12 and concrete sample 19, lower link bar 11 and little nut 14 are loaded onto in four angles of two side guides; Use torque spanner to tighten little nut 14 and make the bending stress that receives of concrete sample 19 reach its experiment design load, afterwards concrete sample 19 is put into main anchor clamps 2 middle positions, four screws of the circular hole on four angles of sensor stand 21 bottom metal with main anchor clamps 2 center platens 15 surfaces are alignd; 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, and another pressing plate 15 contacts in another side and the main anchor clamps 2, after 22 above integral body is put into pressing machine 1 tighting a bolt; Operate oil pump then and drive separate type hydraulic jack 10; Make main anchor clamps 2 be loaded into design load, lay down the pressure of lifting jack 10 behind the fastening nut 18, the reading of observing clock gauge or sensor 20 changes; Again be loaded into the pressure that fastening nut 18 after clock gauge or the sensor 20 reading generation inverse change is laid down lifting jack 10 with lifting jack 10 again; Repeat this process repeatedly only behind the pressure of laying down lifting jack 10 the preceding reading of clock gauge or sensor 20 readings and loading for the first time the same, integral body shifts out pressing machine 1 then, takes off clock gauge or sensor 20; Be coated with one deck fluid sealant in pull bar 17 and nut 18, lower link bar 11 and little nut 14 contact positions; Last integral body can move on to the outdoor exposure test of carrying out, and also can put into corresponding test specimen box 3, all puts into fast freeze-thaw cyclic test machine again and carries out the fast freeze-thaw cyclic test; Slice off the fluid sealant on main anchor clamps 2 and the side anchor clamps 5 with instrument during unloading; Again main anchor clamps 2 are put back in the pressing machine 1, operated oil pump then and drive separate type hydraulic jack 10, make main anchor clamps 2 be loaded into design load; Unscrew the pressure of laying down lifting jack 10 behind the nut 18; Again concrete sample 19 and side anchor clamps 5 integral body are shifted out pressing machine 1, unscrew the little nut 14 on the side anchor clamps 5, take out concrete sample 19 with spanner.When carrying out exposure test, every exposure a period of time master's anchor clamps 2 and side anchor clamps 5 will repeat the process that once unloads and load, the corrosion sign occurs if any the place and want timely painting.
Claims (3)
1. concrete test charger under the coupling of load and many factors; It is characterized in that: comprise pressing machine, anchor clamps, sensor module, test specimen box; Concrete sample and sensor module are installed in the anchor clamps, and anchor clamps are installed in the pressing machine, and the test specimen box is enclosed within the 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 installed between pressing machine top board and the pressing machine lower platen; Lifting jack is installed on the pressing machine lower platen; The first circular metal sleeve is set on the pressing machine top board, the second circular metal sleeve is set on the lifting jack; Anchor clamps master anchor clamps and side anchor clamps; Main anchor clamps comprise main anchor clamps top board, main anchor clamps lower platen, main clamp pull rod; Main clamp pull rod is installed between main anchor clamps top board and the main anchor clamps lower platen; First becket that matches with the first circular metal sleeve is set on the main anchor clamps top board; Second becket that matches with the second circular metal sleeve is set on the main anchor clamps lower platen, and the side anchor clamps comprise side anchor clamps left pressing plate, the right pressing plate of side anchor clamps, side clamp pull rod, and the side clamp pull rod is installed between side anchor clamps left pressing plate and the right pressing plate of side anchor clamps; First group of distance is set on the side anchor clamps left pressing plate is two semicolumn bonding jumpers of 10cm; On the right pressing plate of side anchor clamps second group of distance is set and is two semicolumn bonding jumpers of 30cm, the top board and the lower platen of main anchor clamps is close in the upper and lower end face of concrete sample, and the left pressing plate and the right pressing plate of side anchor clamps are close in two sides of concrete sample; Sensor module comprises sensor stand, sensor, and sensor is installed between anchor clamps top board and the anchor clamps lower platen through sensor stand.
2. concrete test method under the coupling of load and many factors; Adopt concrete test charger under described load of claim 1 and the coupling of many factors; It is characterized in that: draw mark at the corresponding stressed place of concrete sample by the four-point bending test standard; Make in the side anchor clamps that the respective token place is in contact with one another on the semicolumn bonding jumper on the left pressing plate and right pressing plate and concrete sample, the fixation side clamp pull rod makes the bending stress that receives of concrete sample reach its experiment design load, and concrete sample is put into main anchor clamps middle position; Anchor clamps, concrete sample integral body are put into pressing machine; The operation lifting jack makes main anchor clamps be loaded into design load, and fixing main clamp pull rod is laid down the pressure of lifting jack, is loaded into the pressure that the later fastening nut of sensor reading generation inverse change is laid down lifting jack with lifting jack again again; It is the same to repeat said process reading before sensor reading and the loading for the first time behind the pressure of laying down lifting jack; Integral body shifts out pressing machine then, takes off sensor, is coated with one deck fluid sealant at main clamp pull rod and main anchor clamps pressing plate, side clamp pull rod and side anchor clamps pressing plate contact position; Last integral body moves on to the outdoor test specimen box that carries out exposure test or put into correspondence, all puts into fast freeze-thaw cyclic test machine again and carries out the fast freeze-thaw cyclic test; Slice off the fluid sealant on main anchor clamps and the side anchor clamps during unloading, more main anchor clamps are put back in the pressing machine, operate lifting jack then and make main anchor clamps be loaded into design load, releasing lever pressure shifts out pressing machine with concrete sample and side anchor clamps integral body again, takes out concrete sample.
3. concrete test method under load according to claim 2 and the coupling of many factors; It is characterized in that: when carrying out exposure test; Set exposure duration at interval, every through an exposure duration at interval rear jig repeat once to unload and load the process of concrete sample.
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Cited By (16)
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| CN103471757A (en) * | 2013-09-16 | 2013-12-25 | 南京工业大学 | Device for studying concrete lateral pressure by simulating surface friction of formwork |
| CN103728182A (en) * | 2013-12-31 | 2014-04-16 | 沈阳建筑大学 | Device and method for researching performance of steel pipe concrete axial compression component under load and corrosion |
| CN103760009A (en) * | 2014-01-17 | 2014-04-30 | 上海理工大学 | Brickwork pressure-shearing device |
| CN104155198A (en) * | 2014-08-05 | 2014-11-19 | 河海大学 | Device for detecting solution erosion resistance condition of concrete when tensioned |
| CN104198246A (en) * | 2014-09-02 | 2014-12-10 | 辽宁科技大学 | Unconfined compressive strength part and demolding and strength measuring integrated testing machine |
| CN105043865A (en) * | 2015-06-02 | 2015-11-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Testing method for concrete damage fracture performance under double-field coupling |
| CN105910915A (en) * | 2016-05-11 | 2016-08-31 | 哈尔滨工程大学 | Full-section loading device for rocks |
| CN106546491A (en) * | 2016-10-28 | 2017-03-29 | 河海大学 | A kind of detachable rock mass lateral load couples ancillary test device with hydraulic pressure |
| CN106644689A (en) * | 2016-11-17 | 2017-05-10 | 中国矿业大学 | Adjustable lateral pressure loading device and test method used for rock biaxial test |
| CN106769414A (en) * | 2017-01-04 | 2017-05-31 | 湖北工业大学 | Load and test specimen durability test device under environment coupled action |
| CN107543755A (en) * | 2017-08-03 | 2018-01-05 | 中南大学 | Load couples down concrete durability experiment device and evaluation method with Frozen-thawed cycled |
| CN108303318A (en) * | 2018-02-01 | 2018-07-20 | 塔里木大学 | A kind of device and method of test eccentric compression concrete durability |
| CN109142086A (en) * | 2018-07-02 | 2019-01-04 | 东南大学 | A kind of drying and watering cycle-salt crystal corrosion test equivalent conversion is the method for imposed load test |
| CN109187067A (en) * | 2018-09-27 | 2019-01-11 | 贵州大学 | A kind of house rigid testing machine |
| CN109540708A (en) * | 2018-10-30 | 2019-03-29 | 南昌大学 | A kind of test method of simulation concrete under load and environmental factor coupling |
| CN110320106A (en) * | 2019-08-12 | 2019-10-11 | 山西煤矿机械制造股份有限公司 | A kind of dumbbell pin factory strength test device |
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| CN103471757B (en) * | 2013-09-16 | 2015-07-01 | 南京工业大学 | Device for studying concrete lateral pressure by simulating surface friction of formwork |
| CN103471757A (en) * | 2013-09-16 | 2013-12-25 | 南京工业大学 | Device for studying concrete lateral pressure by simulating surface friction of formwork |
| CN103728182A (en) * | 2013-12-31 | 2014-04-16 | 沈阳建筑大学 | Device and method for researching performance of steel pipe concrete axial compression component under load and corrosion |
| CN103728182B (en) * | 2013-12-31 | 2016-03-02 | 沈阳建筑大学 | The apparatus and method of research steel pipe concrete pull-down component performance under load with corrosion |
| CN103760009A (en) * | 2014-01-17 | 2014-04-30 | 上海理工大学 | Brickwork pressure-shearing device |
| CN104155198A (en) * | 2014-08-05 | 2014-11-19 | 河海大学 | Device for detecting solution erosion resistance condition of concrete when tensioned |
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| CN105043865A (en) * | 2015-06-02 | 2015-11-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Testing method for concrete damage fracture performance under double-field coupling |
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| CN106546491B (en) * | 2016-10-28 | 2020-04-03 | 河海大学 | Detachable rock mass lateral load and water pressure coupling auxiliary test device |
| CN106644689A (en) * | 2016-11-17 | 2017-05-10 | 中国矿业大学 | Adjustable lateral pressure loading device and test method used for rock biaxial test |
| CN106769414A (en) * | 2017-01-04 | 2017-05-31 | 湖北工业大学 | Load and test specimen durability test device under environment coupled action |
| CN107543755A (en) * | 2017-08-03 | 2018-01-05 | 中南大学 | Load couples down concrete durability experiment device and evaluation method with Frozen-thawed cycled |
| CN107543755B (en) * | 2017-08-03 | 2020-08-21 | 中南大学 | Concrete durability test device under load and freeze-thaw cycle coupling and evaluation method |
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| CN109540708A (en) * | 2018-10-30 | 2019-03-29 | 南昌大学 | A kind of test method of simulation concrete under load and environmental factor coupling |
| CN110320106A (en) * | 2019-08-12 | 2019-10-11 | 山西煤矿机械制造股份有限公司 | A kind of dumbbell pin factory strength test device |
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