CN110220791B - Axial tensile test device for cylindrical concrete member - Google Patents
Axial tensile test device for cylindrical concrete member Download PDFInfo
- Publication number
- CN110220791B CN110220791B CN201910460029.0A CN201910460029A CN110220791B CN 110220791 B CN110220791 B CN 110220791B CN 201910460029 A CN201910460029 A CN 201910460029A CN 110220791 B CN110220791 B CN 110220791B
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- main body
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- force transmission
- clamp
- transmission main
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- 238000009864 tensile test Methods 0.000 title claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000004154 testing of material Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
Classifications
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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
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
-
- 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
- G01N2203/0017—Tensile
-
- 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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- 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
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
-
- 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
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0405—Features allowing alignment between specimen and chucks
-
- 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 axial tensile test device for the cylindrical concrete member comprises a device main body and a data acquisition system, wherein the device main body comprises a first component and a second component, the first component and the second component are in axisymmetric structures, and a test station for placing the cylindrical concrete member to be tested is arranged between the first component and the second component; the first assembly comprises a clamping rod, a flexible steel wire rope, a rolling bearing, a connecting assembly, a bearing relative position fixing rod piece, a force transmission main body shell, a clamp relative fixing rod piece and a concrete test block positioning device, wherein the clamping rod is connected with the closed-loop electrohydraulic servo universal testing machine; the device is characterized in that the force transmission main body shell is provided with a screw hole, the screw hole is used for connecting a bolt rod of the clamp, the bolt rod is connected with the clamp, the tightness of the clamp is controlled through rotation of a bolt, and the tail end of the force transmission main body shell is provided with a concrete test block positioning device. The invention has more convenient operation and smaller error.
Description
Technical Field
The invention relates to a concrete material testing device, in particular to a testing device for measuring axial tensile stress of a cylindrical concrete member, and belongs to the field of building material testing equipment.
Background
The axial tensile strength of the concrete is an important index of the mechanical property of the concrete material, has important reference significance for the construction design of the concrete material for industrial and civil buildings, marine buildings, bridge roads and the like, and particularly has important reference significance for crack control checking calculation. At present, two methods for testing the axial tensile strength of concrete are mainly adopted, one method is indirect measurement, such as a splitting experiment, but the measured experimental data is subjected to later theoretical deduction treatment, and is relatively complicated. The other is direct measurement, the measurement method is simple, and the axial tensile strength of the concrete test block can be obtained by simply analyzing the data. However, this method of direct measurement requires a high level of demands on the drawing device, since axial drawing of the test block is ensured. There is a need for a process that is simple to operate and that ensures axial stretching. Therefore, the tensile mechanical property of the concrete can be better determined, and more accurate reference data is provided for the application and design of concrete materials.
Disclosure of Invention
In order to overcome the defects of complex operation and larger error of the existing concrete axial tensile strength test mode, the invention provides the cylindrical concrete member axial tensile test device which is more convenient to operate and smaller in error.
The technical scheme adopted for solving the technical problems is as follows:
the axial tensile test device for the cylindrical concrete member comprises a device main body and a data acquisition system, wherein the device main body comprises a first component and a second component, the first component and the second component are in axisymmetric structures, and a test station for placing the cylindrical concrete member to be tested is arranged between the first component and the second component;
the first assembly comprises a clamping rod, a flexible steel wire rope, a rolling bearing, a connecting assembly, a bearing relative position fixing rod piece, a force transmission main body shell, a clamp relative fixing rod piece and a concrete test block positioning device, wherein the clamping rod is connected with the closed-loop electrohydraulic servo universal testing machine; the novel electric hydraulic servo universal testing machine is characterized in that a rolling bearing is arranged in the force transmission main body shell, one end of the rolling bearing penetrates through the force transmission main body shell through a steel wire rope, the other end of the bearing is connected with a flexible steel wire rope through a connecting component, the connecting component is connected with the steel wire rope, the flexible steel wire rope is connected with a clamping rod, and the clamping rod is connected with the closed-loop electric hydraulic servo universal testing machine.
The device is characterized in that the force transmission main body shell is provided with a screw hole, the screw hole is used for connecting a bolt rod of the clamp, the bolt rod is connected with the clamp, the tightness of the clamp is controlled through rotation of a bolt, and the tail end of the force transmission main body shell is provided with a concrete test block positioning device.
Further, the bolt and the clamp are not fixedly connected, but can rotate relatively, and the tightness of the clamp is controlled by rotating the bolt.
Still further, the concrete test block positioning device is made of rubber with certain elasticity, and cylindrical concrete is fixed in the center of the force transmission main body shell.
The beneficial effects of the invention are mainly shown in the following steps: the operation is more succinct, owing to adopt flexible wire rope, the axle draws the center to find more easily, and control error is littleer.
Drawings
Fig. 1 is a schematic diagram of the overall arrangement of the present invention.
Fig. 2 is a schematic structural view of the present invention.
Fig. 3 is a detailed view of the connection between the connection assembly of the bearing to the wire rope and the rolling bearing.
Fig. 4 is a bearing diagram.
FIG. 5 is a detailed view of the connection of the tension bolt and the clamp.
Fig. 6 is a detailed view of the clamp.
Fig. 7 is a detailed view of the positioning device.
Fig. 8 is a diagram of the positional relationship of the jig and the force transmission body case.
In the figure: the device comprises a clamping rod 1 connected with a closed-loop electrohydraulic servo universal testing machine, a first flexible steel wire rope 2, a connecting component 3 connected with the steel wire rope, a rolling bearing 4, a first bearing relative position fixing rod piece 5, a second flexible steel wire rope 6, a second bearing relative position fixing rod piece 7, a connecting ring 8, a force transmission main body shell 9, a clamp relative fixing rod piece 10, a clamp 11, an elastic bolt 12, a force transmission buckle 13, a concrete test block positioning device 14 and a cylindrical concrete test block 15.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 8, a cylindrical concrete member axial tensile test device comprises a device main body and a data acquisition system, wherein the device main body comprises a first component and a second component, and the first component and the second component are in axisymmetric structures;
the first assembly comprises a clamping rod 1, a first flexible steel wire rope 2, a rolling bearing 4, a connecting assembly 3, a first bearing relative position fixing rod piece 5, a second flexible steel wire rope 6, a second bearing relative position fixing rod piece 7, a force transmission main body shell 9, a clamp 11, a clamp relative fixing rod piece 10 and a concrete test block positioning device 14, wherein the clamping rod 1 is connected with the closed-loop electrohydraulic servo universal testing machine; the novel electric hydraulic servo universal tester is characterized in that a rolling bearing 4 is arranged in a force transmission main body shell 9, one end of the rolling bearing 4 penetrates through the force transmission main body shell 9 through a second flexible steel wire rope 6, the other end of the rolling bearing 4 is connected with a first flexible steel wire rope 2 through a connecting component 3, which is connected with the steel wire rope, of the bearing, the first flexible steel wire rope 2 is connected with a clamping rod 1, and the clamping rod 1 is connected with a closed-loop electric hydraulic servo universal tester.
The force transmission main body shell 9 is provided with 3 screw holes (120 degrees are formed by connecting the force transmission main body shell with the center of the cylinder), the 3 screw holes are used for connecting bolt rods of the clamp, the bolt rods are connected with the clamp, and the tightness of the clamp is controlled by rotating the bolts. The end of the force transmission main body shell 9 is provided with a concrete test block positioning device 14.
Further, the bolt and the clamp are not fixedly connected, but can rotate relatively, and the tightness of the clamp is controlled by rotating the bolt.
Further, the concrete test block positioning device 14 is made of rubber with certain elasticity, and fixes the cylindrical concrete at the center of the force transmission main body shell 9.
In this embodiment, one end of the cylindrical concrete axial tension test piece 15 to be tested is first inserted into the first component fixture, and the positioning device 14 positions the cylindrical concrete axial tension test piece to be tested at the right center between the fixtures 11. The bolts 12 are screwed inward so that the clamps 11 clamp the cylindrical concrete axial tension test piece 15 to be tested. Likewise, the other end of the cylindrical concrete axial tension test piece 15 to be tested is clamped with a second assembly. And then the clamping rod 1 and the second clamping rod 1 of the first component are respectively connected with two loading devices at the two ends of a closed-loop electrohydraulic servo universal tester (WAW-1000 type). After the test piece is fixed, when the two ends of the test piece are subjected to vertical tensile force, if the test piece has the condition that the axes are not aligned, the first flexible steel wire rope 2 and the rolling bearing 4 can enable the test piece to slightly rotate and realign through the angle and the position of the adjusting screw corresponding to the received tensile force so as to achieve the state of aligning the axes, the cylindrical concrete test block is still in axial tension under the action of the tensile force, and the loading device is started to load so as to start the axial tension test of the concrete member. When the test piece breaks, according to the numerical value F of the loading load displayed by the universal testing machine, according to the formula: the tensile strength of the axial tensile test piece of the concrete to be tested can be obtained by sigma=F/A, wherein A is the cross-sectional area of the test piece to be tested.
When the electro-hydraulic servo universal experimental machine is used, a cylindrical concrete axial tension test piece to be tested is clamped between a first component and a second component, then a clamping rod is fixed on loading devices at the upper end and the lower end of the electro-hydraulic servo universal experimental machine, the electro-hydraulic servo universal experimental machine is started, corresponding parameters are set, when the electro-hydraulic servo universal experimental machine works, when the test piece breaks, the numerical value F of loading load on the electro-hydraulic servo universal experimental machine is read, and according to the formula: the tensile strength of the axial tensile test piece of the concrete to be tested can be obtained by sigma=F/A, wherein A is the cross-sectional area of the test piece to be tested.
Claims (3)
1. The axial tensile test device for the cylindrical concrete member comprises a device main body and a data acquisition system, and is characterized in that the device main body comprises a first component and a second component, wherein the first component and the second component are in axisymmetric structures, and a test station for placing the cylindrical concrete member to be tested is arranged between the first component and the second component;
the first assembly comprises a clamping rod, a flexible steel wire rope, a rolling bearing, a connecting assembly, a rolling bearing relative position fixing rod piece, a force transmission main body shell, a clamp relative fixing rod piece and a concrete test block positioning device, wherein the clamping rod is connected with the closed-loop electrohydraulic servo universal testing machine; the outer side of the force transmission main body shell is provided with a rolling bearing, one end of the rolling bearing penetrates through the force transmission main body shell through a steel wire rope, the other end of the rolling bearing is connected with a flexible steel wire rope through the connecting component, the flexible steel wire rope is connected with a clamping rod, and the clamping rod is connected with a closed-loop electrohydraulic servo universal testing machine;
the device is characterized in that the force transmission main body shell is provided with 3 screw holes, the 3 screw holes are connected with the center of the cylinder to form 120 degrees, the screw holes are used for connecting bolt rods of the clamp, the bolt rods are connected with the clamp, tightness of the clamp is controlled through rotation of bolts, and the tail end of the force transmission main body shell is provided with a concrete test block positioning device.
2. The axial tensile testing device for cylindrical concrete members according to claim 1, wherein said bolts and said clamps are rotatably connected with each other, and said bolts are rotated to control tightness of said clamps.
3. The axial tensile test device for cylindrical concrete members according to claim 1 or 2, wherein the concrete test block positioning means is made of elastic rubber sheet, and fixes the cylindrical concrete at the center of the force transmission main body housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460029.0A CN110220791B (en) | 2019-05-30 | 2019-05-30 | Axial tensile test device for cylindrical concrete member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460029.0A CN110220791B (en) | 2019-05-30 | 2019-05-30 | Axial tensile test device for cylindrical concrete member |
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| Publication Number | Publication Date |
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| CN110220791A CN110220791A (en) | 2019-09-10 |
| CN110220791B true CN110220791B (en) | 2024-03-22 |
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| CN201910460029.0A Active CN110220791B (en) | 2019-05-30 | 2019-05-30 | Axial tensile test device for cylindrical concrete member |
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| CN (1) | CN110220791B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110514521A (en) * | 2019-09-27 | 2019-11-29 | 浙江大学深圳研究院 | A kind of separate type uniaxial loading mechanics vibration testing device |
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| CN110220791A (en) | 2019-09-10 |
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