CN112945705A - Model experiment confining pressure loading device and construction method thereof - Google Patents
Model experiment confining pressure loading device and construction method thereof Download PDFInfo
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- CN112945705A CN112945705A CN202110288587.0A CN202110288587A CN112945705A CN 112945705 A CN112945705 A CN 112945705A CN 202110288587 A CN202110288587 A CN 202110288587A CN 112945705 A CN112945705 A CN 112945705A
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- 238000011068 loading method Methods 0.000 title claims abstract description 100
- 238000002474 experimental method Methods 0.000 title claims abstract description 33
- 238000010276 construction Methods 0.000 title claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000012856 packing Methods 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 238000005422 blasting Methods 0.000 claims description 9
- 239000011888 foil Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910001006 Constantan Inorganic materials 0.000 claims description 3
- 229910018487 Ni—Cr Inorganic materials 0.000 claims description 3
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 10
- 238000004088 simulation Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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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
- G01N3/066—Special adaptations of indicating or recording means with electrical 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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a confining pressure loading device for a model experiment and a construction method thereof, belonging to the technical field of concrete confining pressure simulation loading equipment. The loading plate that 2 about and 2 copper upper and lower copper made encloses into the cavity cuboid, about 2 on the loading plate symmetry be equipped with a plurality of bolt mounting hole, pass through the bolt mounting hole that the symmetry set up at every screw rod both ends and fix through the nut, all install the packing ring on the screw rod between every nut and the loading plate outer wall, all be fixed with resistance strain gauge on every packing ring, digital display pressure dynamometer, resistance strain gauge lead wire one end connection resistance strain gauge, the other end is connected digital display pressure dynamometer. The confining pressure loading device has the advantages of stable loading confining pressure, simple structure, good economic benefit and simple operation, and most importantly, the loading confining pressure of a large test piece can be directly measured through the reading displayed by the digital dynamometer, and the measured pressure data is accurate.
Description
Technical Field
The invention relates to a confining pressure loading device for a model experiment and a construction method thereof, belonging to the technical field of concrete confining pressure simulation loading equipment.
Background
The model experiment is an important means in scientific research, and the model experiment is to make a model similar to the principle but with reduced size according to the similar principle to carry out experimental research, convert the model into the principle according to the experimental result, convert the experimental data into practical engineering application, and ensure that the experimental theory has no deviation or little deviation with the reality.
In the pouring process of the concrete experimental model, the construction of the mold is one of the most important factors for the model experiment to achieve the expected effect. In a model experiment, a model is generally manufactured in a reduced scale or in a specific case in an enlarged scale, and then a stress-strain change rule and a structure change rule generated on a simulated prototype (simulation entity) are judged and recognized by observing stress and strain on the model and changing the structure of a model specimen. The mechanical experiment simulation technology is based on a similar theory, and in the simulation process, the real stress situation of the concrete test piece on the site is simulated by reducing the simulation entity, the proportion of the stress and the gravity and the like. In the past, for small experimental test pieces, mechanical properties of concrete test pieces are mostly researched and analyzed by adopting an SHPB (split harmonic vibration damping) experiment, and the force for loading the test pieces can be known on a loading instrument.
However, at present, most confining pressure loading devices applied to concrete impact tests adopt a confining pressure device with a single structure to carry out confining pressure application, so that the problems of unstable confining pressure, inconvenience in operation and low confining pressure loading precision exist, most importantly, the force added to the blasting load of a large test piece cannot be directly measured through a dynamometer, and based on the situations, a model experiment confining pressure loading device and a construction method thereof are designed.
Disclosure of Invention
The invention aims to provide a confining pressure loading device for a model experiment and a construction method thereof, which are used for solving the problems of defects in the background technology.
The technical scheme adopted by the invention is as follows: a confining pressure loading device for a model experiment comprises a loading plate 1, a screw rod 2, a screw cap 3, a gasket 4, a resistance strain gauge 5, a strain gauge lead 6 and a digital display pressure dynamometer 7;
about 2 with about the loading plate 1 that 2 copper plates made enclose into the cavity cuboid, about 2 on the loading plate 1 the symmetry be equipped with a plurality of bolt mounting hole, 2 both ends of every screw rod pass behind the bolt mounting hole of symmetry setting through nut 3 fixed, all install packing ring 4 on the screw rod 2 between every nut 3 and the loading plate 1 outer wall, all be fixed with resistance strain gauge 5 on every packing ring 4, digital display pressure dynamometer 7, 6 one end connection resistance strain gauge 5 of foil gage lead wire, the other end is connected digital display pressure dynamometer 7.
Specifically, the resistance strain gauge 5 is formed by winding constantan wire or nickel-chromium wire with the diameter of 0.02-0.05 mm into a grid shape, or corroding a thin metal foil into a grid shape.
Preferably, the loading plate 1 is a steel plate with the thickness of 1 cm.
Preferably, the strain gauge lead 6 is a tin-plated copper wire.
Preferably, each loading plate 1 is provided with 6 bolt mounting holes.
Preferably, the hollow square body is internally provided with a reinforcing rib.
Preferably, the reinforcing ribs and the screw rods 2 in the hollow square bodies are distributed in a cross shape.
Preferably, the bolt 3 is a high-strength bolt of 8.8 grade or above.
A construction method of the model experiment confining pressure loading device comprises the following steps:
the method comprises the following steps: firstly, selecting a flat ground as a base surface of a confining pressure device, selecting 4 steel plates as four loading plates 1, namely a left loading plate, a right loading plate, an upper loading plate and a lower loading plate, wherein the four loading plates are respectively 2, and the upper loading plate and the lower loading plate, on the flat base surface, after a screw rod 2 passes through bolt mounting holes which are symmetrically arranged, two ends of the screw rod 2 extend out of the loading plate 1 and are fixed through a screw cap 3, a gasket 4 is arranged on the screw rod 2 between the screw cap 3 and the outer wall of the loading plate 1, a resistance strain gauge 5 and a digital display pressure dynamometer 7 are arranged on the gasket 4, one end of a strain gauge lead 6 is connected with the resistance strain gauge 5;
step two: reinforcing ribs are arranged in a hollow square body surrounded by the four loading plates 1;
step three: concrete is poured into the hollow square body formed by the four loading plates 1 in a surrounding mode, so that the reinforcing ribs and the screw rods 2 are distributed in a cross shape;
step four: and after the model experiment confining pressure loading device is poured, cutting and blasting the cut holes on the concrete without the loading plates 1 at the front end and the rear end according to actual needs.
The invention has the beneficial effects that:
the invention relates to a confining pressure loading method for a model experiment, which is widely applied, can be used for not only blasting experiments on buildings, but also testing the strength (firmness) of the buildings, and when concrete is loaded, the concrete is fixed in a loading device, and a digital dynamometer is arranged on each of the upper gasket, the lower gasket, the front gasket and the rear gasket of the loading device, so that the confining pressure loading of the confining pressure loading device is stable, the device has a simple structure and good economic benefit, the operation is simple, the magnitude of the loaded confining pressure of a large test piece can be directly measured through the reading displayed by the digital dynamometer, the measured pressure data is accurate, and the effectiveness of the test and the reliability of the test result are ensured.
Drawings
To more clearly illustrate the specific methods and solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments or the prior art are briefly described below, and the drawings in the following description are only some embodiments of the present invention.
Fig. 1 is a front view structural diagram of a model experiment confining pressure loading method according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of a portion of FIG. 1;
fig. 3 is a diagram showing the arrangement of blasting cut holes in the model, and all data in mm are shown in the diagram.
In the figure: the pressure gage comprises a loading plate 1, a screw rod 2, a screw cap 3, a gasket 4, a resistance strain gage 5, a strain gage lead 6 and a digital display pressure gage 7.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the invention.
Example 1: as shown in fig. 1-3, a model experiment confining pressure loading device comprises a loading plate 1, a screw 2, a nut 3, a gasket 4, a resistance strain gauge 5, a strain gauge lead 6 and a digital display pressure dynamometer 7;
about 2 load plates 1 that make with 2 upper and lower copper plates enclose into the cavity cuboid (before the building concrete, both ends are open around the cavity cuboid), 2 go up the symmetry on load plate 1 and be equipped with a plurality of bolt mounting hole about, 2 both ends of every screw rod pass behind the bolt mounting hole of symmetry setting fixed through nut 3, all install packing ring 4 on screw rod 2 between every nut 3 and the load plate 1 outer wall, all be fixed with resistance strain gauge 5 on every packing ring 4, digital display pressure dynamometer 7, 6 one end connection resistance strain gauge 5 of foil gage lead wire, the other end is connected digital display pressure dynamometer 7. In the invention, each gasket is provided with a digital display pressure and force measuring meter 7, only one is shown in figure 1 for the sake of the attractive appearance of the figure, and the others are the same as the figure.
Further, the resistance strain gauge 5 is formed by winding constantan wire or nickel-chromium wire with the diameter of 0.02-0.05 mm into a grid shape or corroding a thin metal foil into a grid shape.
Furthermore, the loading plate 1 is a steel plate with the thickness of 1cm, and can ensure loading confining pressure.
Further, the strain gauge lead 6 is a tinned copper wire.
Further, each loading plate 1 is provided with 6 bolt mounting holes, as shown in fig. 1, in the present embodiment, 12 bolt mounting holes are provided on the upper and lower loading plates 1, and 12 bolt mounting holes are provided on the left and right loading plates 1.
Furthermore, the hollow square body is internally provided with a reinforcing rib, so that the firmness of the whole device can be effectively enhanced.
Furthermore, the reinforcing ribs and the screw rods 2 in the hollow square bodies are distributed in a cross shape.
Furthermore, the bolt 3 is a high-strength bolt with the grade of 8.8 and above, so that blasting implementation can be effectively guaranteed.
A construction method of the model experiment confining pressure loading device comprises the following steps:
the method comprises the following steps: firstly, selecting a flat ground as a base surface of a confining pressure device, selecting 4 steel plates as four loading plates 1, namely a left loading plate, a right loading plate, an upper loading plate and a lower loading plate, wherein the four loading plates are respectively 2, and the upper loading plate and the lower loading plate, on the flat base surface, after a screw rod 2 passes through bolt mounting holes which are symmetrically arranged, two ends of the screw rod 2 extend out of the loading plate 1 and are fixed through a screw cap 3, a gasket 4 is arranged on the screw rod 2 between the screw cap 3 and the outer wall of the loading plate 1, a resistance strain gauge 5 and a digital display pressure dynamometer 7 are arranged on the gasket 4, one end of a strain gauge lead 6 is connected with the resistance strain gauge 5;
step two: reinforcing ribs are arranged in a hollow square body surrounded by the four loading plates 1;
step three: concrete is poured into the hollow square body formed by the four loading plates 1 in a surrounding mode, so that the reinforcing ribs and the screw rods 2 are distributed in a cross shape;
step four: and after the model experiment confining pressure loading device is poured, cutting and blasting the cut holes on the concrete without the loading plates 1 at the front end and the rear end according to actual needs. On the model of pouring, arrange the cut hole, the effectual of blasting explains that confined pressure loading device is fit for the confined pressure loading, and the confined pressure can satisfy the blasting experiment.
The working principle of the invention is as follows: the left and right loading plates 1 are symmetrically arranged on the front and rear two opposite sides of the concrete, when the confining pressure loading device is reinforced in an experiment, the reinforced pressure can be transmitted to the digital display pressure force measuring meter 7 through the resistance strain gauge 5, and then the pressure when the confining pressure device is pressurized can be directly measured through the reading displayed by the digital display pressure force measuring meter 7.
In the model poured in the peaceful chemical plant, a model which is similar to the principle but has a reduced size is manufactured for experimental research, and is converted into field production according to the experimental result, so that the experimental error can be reduced, and the accuracy of the experimental data of the model can be improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides a model experiment confined pressure loading device which characterized in that: the device comprises a loading plate (1), a screw (2), a nut (3), a gasket (4), a resistance strain gauge (5), a strain gauge lead (6) and a digital display pressure dynamometer (7);
load plate (1) that 2 blocks and upper and lower 2 copper plates were made encloses into the cavity cuboid about, 2 block symmetry are equipped with a plurality of bolt mounting hole on load plate (1) about, 2 block symmetry are equipped with a plurality of bolt mounting hole on upper and lower 2 load plate (1), it is fixed through nut (3) after passing the bolt mounting hole that the symmetry set up at every screw rod (2) both ends, all install packing ring (4) on screw rod (2) between every nut (3) and load plate (1) outer wall, all be fixed with resistance foil gage (5) on every packing ring (4), digital display pressure dynamometer (7), resistance foil gage (5) are connected to foil gage lead (6) one end, digital display pressure dynamometer (7) are connected to the other end.
2. The confining pressure loading device for model experiment as recited in claim 1, wherein: the resistance strain gauge (5) is formed by winding constantan wires or nickel-chromium wires with the diameter of 0.02-0.05 mm into a grid shape or corroding a thin metal foil into the grid shape.
3. The confining pressure loading device for model experiment as recited in claim 1, wherein: the loading plate (1) is a steel plate with the thickness of 1 cm.
4. The confining pressure loading device for model experiment as recited in claim 1, wherein: the strain gauge lead (6) is a tinned copper wire.
5. The confining pressure loading device for model experiment as recited in claim 1, wherein: each loading plate (1) is provided with 6 bolt mounting holes.
6. The confining pressure loading device for model experiment as recited in claim 1, wherein: the hollow square body is internally provided with a reinforcing rib.
7. The confining pressure loading device for model experiment as recited in claim 6, wherein: the reinforcing ribs and the screw rods (2) in the hollow square bodies are distributed in a cross shape.
8. The confining pressure loading device for model experiment as recited in claim 1, wherein: the bolt (3) is a high-strength bolt with the grade of 8.8 and above.
9. The construction method of the model experiment confining pressure loading device according to any one of claims 1 to 8 is characterized in that: the method comprises the following steps:
the method comprises the following steps: firstly, selecting a flat ground as a base surface of a confining pressure device, selecting 4 steel plates as four loading plates (1), namely a left loading plate, a right loading plate and an upper loading plate and a lower loading plate, wherein the left loading plate and the right loading plate are 2, the upper loading plate and the lower loading plate are 2, on the flat base surface, after a screw rod (2) passes through bolt mounting holes which are symmetrically arranged, two ends of the screw rod (2) extend out of the loading plates (1) and are fixed through nuts (3), a gasket (4) is mounted on the screw rod (2) between the nuts (3) and the outer wall of the loading plates (1), a resistance strain gauge (5) and a digital display pressure dynamometer (7) are mounted on the gasket (4), one end of a strain gauge lead (6) is connected with the resistance strain gauge (5;
step two: reinforcing ribs are arranged in a hollow square body formed by the four loading plates (1);
step three: concrete is poured in the hollow square body formed by the four loading plates (1) in a surrounding mode, so that the reinforcing ribs and the screw rods (2) are distributed in a cross mode;
step four: after the model experiment confining pressure loading device is poured, cutting and blasting the cut holes on the concrete without the loading plates (1) at the front end and the rear end according to actual needs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110288587.0A CN112945705A (en) | 2021-03-18 | 2021-03-18 | Model experiment confining pressure loading device and construction method thereof |
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| CN202110288587.0A CN112945705A (en) | 2021-03-18 | 2021-03-18 | Model experiment confining pressure loading device and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2702299Y (en) * | 2003-12-25 | 2005-05-25 | 中国建筑材料科学研究院 | Probe unit for damages caused by combined action of concrete environment corrosion and mechanic load |
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| CN108414357A (en) * | 2018-05-07 | 2018-08-17 | 福州大学 | A kind of device and its working method for realizing steel tube confined concrete test specimen axis pressure |
| CN109490107A (en) * | 2018-11-19 | 2019-03-19 | 四川大学 | The explosively loading experimental rig of high stressed soft rock under a kind of three axis confining pressure |
| CN110865178A (en) * | 2019-11-27 | 2020-03-06 | 山东科技大学 | Test device and test method for simulating influence of embedding depth of anchoring section |
| CN110926970A (en) * | 2019-11-19 | 2020-03-27 | 中交第二公路勘察设计研究院有限公司 | Prefabricated structure surface concrete single-hole blasting test device and test method |
| CN111707545A (en) * | 2020-06-24 | 2020-09-25 | 扬州大学 | Concrete compression load-sustaining and creep performance testing device in erosion service environment and operation method thereof |
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2021
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|---|---|---|---|---|
| CN2702299Y (en) * | 2003-12-25 | 2005-05-25 | 中国建筑材料科学研究院 | Probe unit for damages caused by combined action of concrete environment corrosion and mechanic load |
| CN202956053U (en) * | 2012-12-14 | 2013-05-29 | 山东科技大学 | Blasting experiment model of round roadway |
| CN103674708A (en) * | 2013-12-27 | 2014-03-26 | 大连大学 | Multi-factor coupling concrete durability study experiment loading device |
| CN205224129U (en) * | 2015-12-21 | 2016-05-11 | 武汉科技大学 | Single pile basis vertical bearing capacity's experiment detection device |
| CN205692442U (en) * | 2016-03-01 | 2016-11-16 | 北京交通大学 | Prestressed, reinforced analog loading test device |
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| CN108414357A (en) * | 2018-05-07 | 2018-08-17 | 福州大学 | A kind of device and its working method for realizing steel tube confined concrete test specimen axis pressure |
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