CN111707544A - FRP rib pressed load holding and testing device and operation method thereof - Google Patents
FRP rib pressed load holding and testing device and operation method thereof Download PDFInfo
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- CN111707544A CN111707544A CN202010586671.6A CN202010586671A CN111707544A CN 111707544 A CN111707544 A CN 111707544A CN 202010586671 A CN202010586671 A CN 202010586671A CN 111707544 A CN111707544 A CN 111707544A
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- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 114
- 239000010959 steel Substances 0.000 claims abstract description 114
- 238000005096 rolling process Methods 0.000 claims abstract description 31
- 230000006835 compression Effects 0.000 claims abstract description 15
- 238000007906 compression Methods 0.000 claims abstract description 15
- 238000011068 loading method Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000004382 potting Methods 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims 2
- 238000012669 compression test Methods 0.000 claims 1
- 238000010998 test method Methods 0.000 claims 1
- 230000007774 longterm Effects 0.000 abstract description 3
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 58
- 239000011151 fibre-reinforced plastic Substances 0.000 description 58
- 230000003628 erosive effect Effects 0.000 description 17
- 239000000463 material Substances 0.000 description 9
- 210000003205 muscle Anatomy 0.000 description 8
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- 239000011159 matrix material Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
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- 238000012986 modification Methods 0.000 description 3
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- 238000004088 simulation Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 150000003841 chloride salts Chemical class 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
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- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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- 229920003002 synthetic resin Polymers 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
- G01N2203/024—Corrosive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0252—Monoaxial, i.e. the forces being applied along a single axis of the specimen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- 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 FRP bar load bearing and testing device and the operation method thereof are characterized in that three steel plates are arranged in parallel, and four prestressed finish rolling twisted steel bars sequentially pass through the three steel plates; the FRP ribs with two bonding sleeves are fixedly clamped between the middle steel plate and the right steel plate, the round sleeves are clamped and fixed between the middle steel plate and the left steel plate, and the outer ends of the left steel plate and the right steel plate are respectively provided with finish rolling nuts used for being screwed with corresponding prestress finish rolling threaded steel bars. The strain gauge is attached to the outer surface of the round sleeve and is connected with the resistance strain gauge through a connecting wire, so that a compression load test can be completed. For the FRP bar compression testing device, a square steel plate and a drawing instrument are added on the basis of a load holding device. The invention simplifies the test device and reduces the cost problem that a large number of load sensors are occupied for long-term load holding.
Description
Technical Field
The invention belongs to the technical field of civil engineering test, and particularly relates to a device for testing the load of an FRP rib under pressure and an operation method thereof.
Background
The Fiber Reinforced Plastic (FRP) has the advantages of light weight, high strength, fatigue resistance, corrosion resistance, designability, easy processing and the like, and can replace steel to reinforce a concrete structure.
The FRP is a novel composite material prepared by taking continuous fibers as a reinforcement and polymer resin as a matrix through the processes of soaking, curing and the like. FRP consists of three parts: continuous fibers, resin matrix, and fiber/resin interface. Wherein, the continuous fibers are uniformly dispersed in the resin matrix, and the resin matrix is in linkage and synergistic stress. The pultrusion process of the FRP rib is to obtain an FRP rib product by sequentially carrying out the steps of gum dipping, surface treatment, preforming, curing molding, cutting and the like on a continuous fiber yarn bundle under the action of the pulling force of a tractor. In addition, through hybrid design, novel fiber reinforced composite material ribs such as hybrid fiber composite ribs (HFRP for short) and steel-continuous fiber composite ribs (SFCB for short) have been developed in succession.
The method for accurately measuring the basic mechanical property of the FRP rib, particularly the mechanical property of the rib in an erosion environment, is a foundation for applying the FRP rib to the field of civil engineering construction. At present, most of related researches on the durability of FRP ribs are to place the ribs in an erosion environment for a period of time and then directly perform mechanical property tests, and few related researches on the durability of the FRP ribs in an actual erosion environment service state (coupling effect of load and the erosion service environment) are performed. On the basis of mastering the short-term performance of the FRP ribs and the reinforced concrete structure thereof, the long-term durability of the FRP ribs and the reinforced concrete structure under a typical application environment needs to be further defined, so that the safety, the reasonability and the large-scale application of the FRP ribs are guaranteed. Therefore, development and application of the FRP rib test device based on durability have important practical value.
Disclosure of Invention
The invention provides a device for holding load and testing FRP (fiber reinforced Plastic) ribs under compression and an operation method thereof aiming at researching the compression resistance of the FRP ribs, and aims to realize holding load of FRP ribs in an erosion environment so as to measure the durability, mainly the compression mechanical property, of the FRP ribs under the action of the erosion environment. The invention mainly adopts a novel load holding device and uses a more novel, simple and rapid device to realize the compression and load holding of the FRP rib material. The whole device is placed in an erosion environment, the FRP rib materials are in a load and erosion environment coupling action state, and the actual erosion environment service stress state is simulated.
The invention comprises two devices, one is an FRP rib compression load holding device, and the other is an FRP rib compression performance testing device. The sleeve load holding device is simple to operate and can effectively hold pressure.
In order to realize the purpose, the device of the invention is divided into two steps of load holding and testing, and adopts the following technical scheme:
the device for holding load and testing the FRP ribs under pressure is characterized by comprising an FRP rib, two bonding sleeves, three steel plates, a round sleeve and four prestressed finish rolling twisted steel bars which are horizontally arranged and are arranged in parallel; the two bonding sleeves are respectively fixed at two ends of the FRP bars through potting adhesive, the three steel plates are arranged in parallel, and the four prestressed finish-rolled twisted steel bars sequentially pass through the three steel plates; the FRP ribs with two bonding sleeves are fixedly clamped between the middle steel plate and the right steel plate, the round sleeves are clamped and fixed between the middle steel plate and the left steel plate, the outer ends of the left steel plate and the right steel plate are respectively provided with a finish rolling nut used for screwing with a corresponding prestress finish rolling threaded steel bar, and a steel washer is arranged between the finish rolling nut and the corresponding steel plate.
Furthermore, the FRP ribs and the bonding sleeves are connected through the internal filling structural adhesive.
Furthermore, the inner surface and the outer surface of the round sleeve are smooth circles, the outer surface of the round sleeve is pasted with a strain gauge, and the strain gauge is connected with a resistance strain gauge through a connecting lead so as to complete a compression load test. Specifically, the continuous load:
the four finish rolling nuts on the outer side of the left steel plate are simultaneously rotated to apply inward force to the left steel plate, so that the round sleeve and the bonding sleeve are driven to bear force, the FRP bar is pressed, and the right steel plate limits the movement of the right bonding sleeve, so that the load holding of the FRP bar is realized; slightly rotating the finish rolling nut to realize fine adjustment of load; during the test, the resistance strain gauge values were observed until the designed holding value was reached.
Furthermore, the outside of left side steel sheet is equipped with a square steel sheet, the centre gripping has the appearance of drawing between square steel sheet and the left side steel sheet to accomplish the pressurized test. Four pre-stress finish rolling threaded steel bars penetrate through the square steel plate, and a finish rolling nut screwed with the pre-stress finish rolling threaded steel bars is arranged at the outer side end of the square steel plate. Specifically, during testing:
the drawing instrument is used for loading, the drawing instrument pushes the steel plate on the right side of the drawing instrument to apply a rightward force, the pressure is transmitted to the FRP ribs through the round sleeve and the bonding sleeve, meanwhile, the right steel plate limits the movement of the bonding sleeve on the right side, and then the FRP ribs are applied with pressure until the FRP ribs are crushed; the pressure is measured by a round sleeve connecting resistance strain gauge as a load sensor.
According to the invention, the strain gauge is attached to the outer surface of the round sleeve, and the strain gauge is connected with the resistance strain gauge through the connecting lead, so that a compression load test can be completed. For the FRP bar compression testing device, a square steel plate and a drawing instrument are added on the basis of a load holding device. The specific modifications are as follows: placing a drawing instrument (an oil cylinder of the drawing instrument supports the steel plate) on the left side of the steel plate on the left side, adding a square steel plate on the left side of the drawing instrument and supporting the square steel plate, and screwing a finish rolling nut on the outer side of the square steel plate.
The steel plate is made of stainless steel; in the invention, the loading of the test piece is realized by screwing the nut by hand by the pressure-bearing load-holding device; the compression testing device applies load through manually operating the drawing instrument to realize the compression of the FRP rib material; the load is obtained by means of a resistance strain gauge.
The invention has the beneficial effects that:
1. the invention provides a FRP rib tensile load and test device which is simple in structure and easy to operate;
2. the load holding device provides reliable and stable load for the bar material test piece by manually screwing the nut, and the later-stage test device is loaded by operating the drawing instrument, so that the requirement of long-term loading can be met, the steel plate can be stably pushed, and the axial pressure can be applied to the FRP bar material;
3. a continuous load can be applied to the test piece without using a reaction frame, and the round sleeve adhered with the strain gauge is used as a load sensor, so that the space occupied by the loading device is greatly reduced;
4. the load holding and testing device is made of corrosion-resistant materials and is not easy to rust; after the test piece is kept loaded, the test piece is placed into an erosion environment simulation device (such as a freeze-thaw test box, a carbonization box, a chloride salt and sulfate erosion solution environment and the like) so that the test piece is in a state of coupling action of load and an erosion environment, and the service stress state of the erosion environment is simulated.
Drawings
FIG. 1 is a schematic view of a FRP rib pressing and load holding device according to the present invention;
FIG. 2 is a schematic view of a square steel plate;
FIG. 3 is a schematic view of a steel washer;
FIG. 4 is a schematic view of a finish rolling nut;
FIG. 5 is a schematic view of a device for holding a FRP rib under pressure and testing the FRP rib according to the present invention;
in the figure: 1 is the FRP muscle, 2 is the bonding sleeve, and 3 are square steel sheet, and 4 are the circle sleeve, and 5 are prestressing force finish rolling twisted steel, and 6 are the steel washer, and 7 are the finish rolling nut, and 8 are the foil gage, and 9 are resistance strain gauge, and 10 are connecting wire, and 11 are drawing the appearance.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in figure 1, the device for holding FRP reinforcement material under pressure comprises an FRP reinforcement 1, a bonding sleeve 2, a square steel plate 3 (comprising a left steel plate, a middle steel plate and a right steel plate), a round sleeve 4, a prestressed finish-rolled threaded steel bar 5, a steel washer 6, a finish-rolled nut 7, a strain gauge 8, a resistance strain gauge 9 and a connecting wire 10. The two bonding sleeves 2 are respectively fixed at two ends of the FRP rib 1 through glue filling.
As shown in fig. 2, three square steel plates 3 are respectively arranged at two ends of the device and between the bonding sleeve 2 and the round sleeve 4, and four round preformed holes are arranged at four corners of each steel plate; the inner and outer light-equalizing circles of the round sleeve 4 are arranged between the left square steel plate 3 and the middle square steel plate 3, and are used as load sensors by pasting strain gauges 8 for measuring the load borne by a pressed test piece; four pre-stressed finish rolling twisted steel bars 5 respectively penetrate reserved holes at four corners of the three square steel plates 3.
As shown in fig. 3, the steel washer 6 is disposed between the square steel plate 3 and the finish rolling nut 7; as shown in fig. 4, the finish rolling nuts 7 are provided outside the left and right square steel plates 3 of the apparatus for joining the prestressed finish-rolled rebar 5 to the left and right square steel plates 3.
Further, the diameter of the preformed holes at the four corners of the square steel plate 3 is larger than that of the prestressed finish-rolled twisted steel 5. The inner diameter of the steel washer 6 is slightly larger than the diameter of the prestressed finish rolling twisted steel 5, the outer diameter of the steel washer is larger than the diameter of an external circle of the finish rolling nut 7, and the finish rolling nut 7 is a hexagon nut.
Still further, the surface of the cylinder 4 is pasted with a strain gauge 8 which is used as a load sensor, the strain gauge 8 is connected with a resistance strain gauge 9 through a connecting wire 10, the circular sleeve 4 is pressed when the load is held, the magnitude of the compressive strain can be displayed by the resistance strain gauge 9 and converted into the pressure applied to the circular sleeve 4 through calculation, and the pressure applied to the circular sleeve 4 is the continuous load applied to the FRP rib.
The device is made of corrosion-resistant stainless steel materials, and the durability of the device is not reduced under the action of an erosion environment.
Load test device is held to FRP muscle pressurized, the continuous load of normal use state is realized through four finish rolling nuts 7 in the 3 outsides of rotatory left end square steel sheet (left side steel sheet) simultaneously, exert inside power to left side square steel sheet 3 through rotatory finish rolling nut 7, drive round sleeve 4, bond sleeve 2 atress, make FRP muscle 1 pressurized, right side square steel sheet 3 has restricted the removal that the sleeve 2 was bonded on the right side simultaneously, and then the realization is to holding lotus of FRP muscle 1. And slightly rotating the finish rolling nut 7 to realize fine adjustment of the load. During the test, the resistance strain gauge 9 values were observed until the designed holding value was reached. In the load holding process, the parallelism of the left square steel plate surface and the right square steel plate surface is ensured. Then, the FRP ribs are loaded and then placed in an erosion environment simulation device (such as a freeze-thaw test chamber, a carbonization chamber, a chloride salt and sulfate erosion solution environment, etc.), and after a predetermined period of time, the FRP ribs are taken out and used in the compression performance testing device in fig. 5.
Example 2
As shown in fig. 5, the device for testing the compressive property of the FRP bar comprises an FRP bar 1, a bonding sleeve 2, a square steel plate 3, a round sleeve 4, a prestressed finish-rolled twisted steel 5, a steel washer 6, a finish-rolled nut 7, a strain gauge 8, a resistance strain gauge 9, a connecting wire 10 and a drawing gauge 11. And taking out the load holding device in the erosion environment simulation device, and adding a square steel plate 3 and a drawing instrument 11 on the basis of the load holding device. A new square steel plate 3 is additionally arranged at the leftmost side of the device, and the left side of the square steel plate is fixed by a steel washer 6 and a finish rolling nut 7; the drawing instrument 11 is arranged between the two leftmost square steel plates 3 and is used for applying pressure.
FRP muscle compressive property testing arrangement utilizes during the test to draw appearance 11 and carries out the loading, draws appearance 11 and promotes square steel sheet 3 on its right side and applys the power to the right side, and pressure passes through circular sleeve 4, bonds sleeve 2 and gives FRP muscle 1, and square steel sheet 3 of right-hand member has restricted the removal that the right-hand member bonds sleeve 2 simultaneously, and then realizes exerting pressure to FRP muscle 1, until the FRP muscle is crushed. The pressure is measured by connecting the round sleeve 4 as a load sensor with a resistance strain gauge 9.
Finally, the present invention is not limited to the above-described embodiments, and many modifications may be made on the basis of the essence of the present invention, and all modifications directly conceivable by those skilled in the art on the basis of the contents of the present invention are to be considered as the scope of protection of the present invention.
Claims (6)
- The device for holding and testing the load of the FRP rib under pressure is characterized by comprising an FRP rib, two bonding sleeves, three steel plates, a round sleeve and four prestressed finish-rolled twisted steel bars which are horizontally arranged and are mutually parallel; the two bonding sleeves are respectively fixed at two ends of the FRP bars through potting adhesive, the three steel plates are arranged in parallel, and the four prestressed finish-rolled twisted steel bars sequentially pass through the three steel plates; the FRP ribs with two bonding sleeves are clamped and fixed between the middle steel plate and the right steel plate, the round sleeves are clamped and fixed between the middle steel plate and the left steel plate, the outer side ends of the left steel plate and the right steel plate are respectively provided with finish rolling nuts for screwing with corresponding prestress finish rolling threaded steel bars, and steel gaskets are arranged between the finish rolling nuts and the corresponding steel plates; the FRP ribs and the bonding sleeves are connected through the internal filling structural adhesive.
- 2. The device for testing the compressive load of the FRP ribs and the test method of the FRP ribs as claimed in claim 1, wherein the inner surface and the outer surface of the round sleeve are smooth circles, the outer surface of the round sleeve is pasted with a strain gauge, and the strain gauge is connected with a resistance strain gauge through a connecting wire so as to complete a compressive load test.
- 3. The FRP rib compression loading and testing device as claimed in claim 2, wherein a square steel plate is arranged on the outer side of the left steel plate, and a drawing instrument is clamped between the square steel plate and the left steel plate to complete the compression test.
- 4. The FRP rib pressing, loading and testing device as claimed in claim 3, wherein four pre-stressed finish-rolled thread reinforcing bars pass through the square steel plate, and a finish-rolled nut screwed with the pre-stressed finish-rolled thread reinforcing bars is provided at an outer end of the square steel plate.
- 5. The operation method of the FRP rib pressing, loading and testing device according to claim 2, wherein the continuous loading:the four finish rolling nuts on the outer side of the left steel plate are simultaneously rotated to apply inward force to the left steel plate, so that the round sleeve and the bonding sleeve are driven to bear force, the FRP bar is pressed, and the right steel plate limits the movement of the right bonding sleeve, so that the load holding of the FRP bar is realized; slightly rotating the finish rolling nut to realize fine adjustment of load; during the test, the resistance strain gauge values were observed until the designed holding value was reached.
- 6. The operation method of the FRP rib pressing, loading and testing device according to claim 3, wherein during testing:the drawing instrument is used for loading, the drawing instrument pushes the left steel plate on the right side of the drawing instrument to apply a rightward force, the pressure is transmitted to the FRP ribs through the round sleeve and the bonding sleeve, meanwhile, the right steel plate limits the movement of the right bonding sleeve, and then the FRP ribs are applied with pressure until the FRP ribs are crushed; the pressure is measured by a round sleeve connecting resistance strain gauge as a load sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010586671.6A CN111707544A (en) | 2020-06-24 | 2020-06-24 | FRP rib pressed load holding and testing device and operation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010586671.6A CN111707544A (en) | 2020-06-24 | 2020-06-24 | FRP rib pressed load holding and testing device and operation method thereof |
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| CN111707544A true CN111707544A (en) | 2020-09-25 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0872155A (en) * | 1994-09-02 | 1996-03-19 | Showa Shell Sekiyu Kk | Flatwise compression testing method |
| 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 |
| CN102169068A (en) * | 2010-12-31 | 2011-08-31 | 扬州大学 | Loading method for concrete member flexural test |
| CN205209870U (en) * | 2015-11-30 | 2016-05-04 | 青岛理工大学 | Concrete durability for research axle load load provide device |
| CN208125500U (en) * | 2018-04-23 | 2018-11-20 | 韩少坤 | A kind of Machine Design prototype experiment stress test device |
| CN210154930U (en) * | 2019-06-28 | 2020-03-17 | 江苏大学 | FRP muscle compression testing arrangement |
| CN111024488A (en) * | 2019-12-30 | 2020-04-17 | 浙江农林大学 | Loading device for continuous loading action of compression component |
| CN210465142U (en) * | 2019-08-27 | 2020-05-05 | 青岛理工大学 | Tunnel lining concrete durability test device |
| CN212646317U (en) * | 2020-06-24 | 2021-03-02 | 扬州大学 | FRP rib compression load holding device |
-
2020
- 2020-06-24 CN CN202010586671.6A patent/CN111707544A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0872155A (en) * | 1994-09-02 | 1996-03-19 | Showa Shell Sekiyu Kk | Flatwise compression testing method |
| 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 |
| CN102169068A (en) * | 2010-12-31 | 2011-08-31 | 扬州大学 | Loading method for concrete member flexural test |
| CN205209870U (en) * | 2015-11-30 | 2016-05-04 | 青岛理工大学 | Concrete durability for research axle load load provide device |
| CN208125500U (en) * | 2018-04-23 | 2018-11-20 | 韩少坤 | A kind of Machine Design prototype experiment stress test device |
| CN210154930U (en) * | 2019-06-28 | 2020-03-17 | 江苏大学 | FRP muscle compression testing arrangement |
| CN210465142U (en) * | 2019-08-27 | 2020-05-05 | 青岛理工大学 | Tunnel lining concrete durability test device |
| CN111024488A (en) * | 2019-12-30 | 2020-04-17 | 浙江农林大学 | Loading device for continuous loading action of compression component |
| CN212646317U (en) * | 2020-06-24 | 2021-03-02 | 扬州大学 | FRP rib compression load holding device |
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Application publication date: 20200925 |