CN109163979B - Adjustable detachable large-eccentricity pressed column testing device and method - Google Patents
Adjustable detachable large-eccentricity pressed column testing device and method Download PDFInfo
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- CN109163979B CN109163979B CN201811055180.8A CN201811055180A CN109163979B CN 109163979 B CN109163979 B CN 109163979B CN 201811055180 A CN201811055180 A CN 201811055180A CN 109163979 B CN109163979 B CN 109163979B
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- 238000012360 testing method Methods 0.000 title claims abstract description 139
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 197
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 44
- 238000004458 analytical method Methods 0.000 claims abstract description 26
- 230000003068 static effect Effects 0.000 claims abstract description 25
- 238000004154 testing of material Methods 0.000 claims description 25
- 239000011148 porous material Substances 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 9
- 239000010720 hydraulic oil Substances 0.000 claims description 7
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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
- 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
- G01N3/12—Pressure testing
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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
- G01N3/04—Chucks
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- 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
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- 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
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- 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
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Abstract
The invention discloses an adjustable detachable large-eccentricity stressed column testing device and method, wherein the device comprises a concrete column test piece, a detachable steel plate, a loading steel plate, a pressure loading unit, a displacement testing unit, a strain gauge, a static signal analysis system and a computer; the concrete column test piece is positioned between the upper loading steel plate and the lower loading steel plate of the pressure loading unit, the end parts of the two sides of the concrete column test piece are provided with dismounting steel plates, and the other end of each dismounting steel plate is provided with a loading steel plate. According to the invention, the detachable steel plate and the loading steel plate are mounted at two ends, so that the fixing effect of the bracket loading end is realized, the steel plates can be detached and recycled, the test device has the test benefits of energy conservation and emission reduction and cost saving, and the tested test piece comes from a real working condition, so that the test data is reliable and real, and the application range is wide.
Description
Technical Field
The invention belongs to the field of concrete buildings, and particularly relates to an adjustable detachable large-eccentricity stressed column testing device and method.
Background
When the bearing force test of the eccentric compression column is carried out in a test room, the bracket is poured, and the eccentricity is provided by increasing the loading surface. The bracket plays and provides the eccentric effect of loading, and the reinforcing bar in the bracket is also more than more dense, and just has lost the value of utilization after the concrete column test piece is destroyed, and this all causes the waste to reinforcing bar and concrete. As most of real frame columns in the engineering are not provided with loading brackets, along with the increasing of dismantling projects, the dismantled members are reasonably utilized for testing, energy conservation and emission reduction can be realized, and because the dismantled members are members under real working conditions, not members maintained under the environment of a laboratory, the test data is more real and reliable. However, because the concrete column test piece actually removed is generally not provided with a loading bracket, the fixed installation eccentric loading of the concrete column test piece under the actual working condition becomes a problem to be solved, and the device disclosed by the invention well solves the problem.
Disclosure of Invention
The invention provides an adjustable detachable large-eccentricity stressed column testing device and method, aiming at the problem of fixed installation and eccentric loading of a concrete column test piece under a real working condition in the prior art.
The invention is realized by the following technical scheme:
an adjustable detachable large eccentric compression column testing device comprises a concrete column test piece, a dismounting steel plate, a loading steel plate, a pressure loading unit, a displacement testing unit, a strain gauge, a static signal analysis system and a computer; the concrete column test piece is positioned between the upper loading steel plate and the lower loading steel plate of the pressure loading unit, the end parts of the two sides of the concrete column test piece are provided with dismounting steel plates, and the other end of each dismounting steel plate is provided with a loading steel plate; the displacement testing unit is connected with the concrete column test piece through a steel wire, and the other end of the displacement testing unit is connected with a signal receiving end of the static signal analysis system through a signal wire; the strain gauge is adhered to the surface of the concrete column test piece, and the other end of the strain gauge is connected with a signal receiving end of the static signal analysis system through a signal wire; the static signal analysis system is connected with a computer;
the pressure loading unit consists of a material testing machine, a controller, a hydraulic oil pump, a force sensor and a movable hinged support, one end of the controller is connected with the computer, the other end of the controller is connected with the material testing machine through the hydraulic oil pump, the force sensor is arranged at the end part of the material testing machine, and an upper loading steel plate and a lower loading steel plate of the material testing machine are connected with the loading steel plate through the movable hinged support;
the displacement testing unit consists of a displacement meter, a magnetic gauge stand and a steel rod; the lower portion of the steel rod is fixedly connected with the ground, the magnetic gauge stand is installed on the upper portion of the steel rod, one end of the magnetic gauge stand is connected with the displacement meter, one end of the displacement meter is connected with the side face of the concrete column test piece through a signal wire, and the other end of the displacement meter is connected with a signal receiving end of the static signal analysis system through a steel wire.
The technical scheme for further solving the problem is that the concrete column test piece is connected with the disassembly steel plate through bolts, and bolt holes are formed in the end faces of two ends of the concrete column test piece.
The technical scheme for further solving the problem is that the disassembly steel plate consists of four steel plates, and the four steel plates correspond to each other in pairs; screw holes aligned with the end faces of the concrete column test piece are formed in the front steel plate and the rear steel plate, and the steel plates are disassembled and fixed by penetrating bolt rods; the surfaces of the front and the rear steel plates are also provided with corresponding strip-shaped holes, and the steel plates on the left and the right sides penetrate through the strip-shaped holes to form a box-shaped structure with the front and the rear steel plates; the upper ends of the front and rear dry plates are provided with a pore passage, and the loading steel plate penetrates through the pore passage and is fixedly connected with the disassembling steel plate.
The technical scheme of the invention is that the surface of the loading steel plate is provided with scales for centering the movable hinged support; the side of loading steel sheet is equipped with a plurality of I shape bayonets, when the loading steel sheet passed the pore of dismantling the steel sheet upper end, pass corresponding I shape steel card strip in the I shape bayonet socket for loading steel sheet and the fixed connection who dismantles the steel sheet.
The invention further solves the technical scheme that 3I-shaped bayonets are arranged.
The technical scheme for further solving the problem is that 5 magnetic gauge seats are arranged and vertically arranged from top to bottom along the end part of the steel, 5 displacement meters are correspondingly arranged, an L-shaped steel sheet is arranged at the joint of each displacement meter and the concrete column test piece, the vertical surface of each L-shaped steel sheet is connected with the side surface of the concrete column test piece in a sticking mode, a circular hole is formed in the horizontal surface of each L-shaped steel sheet, and the steel wire penetrates through the circular hole and is connected with one end of each displacement meter.
The technical scheme for further solving the problem is that a concrete rectangular test block is poured at the lower part of the steel rod, and the concrete rectangular test block is pre-buried in the ground and used for fixing the steel rod.
The invention also provides a test method of the adjustable detachable large eccentric compression column device, which comprises the following steps:
step one, installing a concrete column test piece loading end: firstly, flatly placing a concrete column test piece on the ground, aligning a disassembly steel plate with screw holes with bolt holes at two ends of the concrete column test piece and fixedly connecting the disassembly steel plate with the bolt holes through bolts, then taking a side steel plate to enable the side steel plate to penetrate through a long strip-shaped hole on the surface of an installed steel plate, enabling a loading steel plate to penetrate through a pore channel at the end part of the disassembly steel plate, and installing an I-shaped steel clamping strip at an I-shaped bayonet of the loading steel plate;
step two, assembling a loading device: firstly, a force sensor is installed at the end part of a material testing machine, movable hinged supports are installed on the end faces of upper and lower loading steel plates of the material testing machine, a loaded concrete column test piece is installed between the upper and lower movable hinged supports, the movable hinged supports are connected with the surfaces of the loading steel plates, and the movable hinged supports are centered through scales on the loading steel plates;
step three, connecting a testing device: firstly, mounting a steel rod and a magnetic gauge stand at fixed positions, then pasting a vertical surface of an L-shaped steel sheet on the side surface of a concrete column test piece, penetrating a steel wire in a circular hole in the horizontal plane of the L-shaped steel sheet, and connecting the other end of the steel wire with a displacement meter; uniformly sticking the strain gauge to the side surface of the concrete column test piece; finally, the displacement meter, the strain gauge and the force sensor are connected with a static signal analysis system through a steel wire, and the static signal analysis system is connected with a computer;
opening a computer to manufacture a controller, and further controlling a material testing machine by the controller to load stress on two ends of the concrete column test piece by the material testing machine; the static signal analysis system records the deflection omega of the concrete column test piece in the loading process, the strain delta epsilon (t) of concrete on the surface of the concrete column test piece and the load P (t) corresponding to the concrete column test piece during corresponding displacement and strain.
And step five, comparing the deflection omega of the concrete column test piece measured in the step four with the theoretical calculated value of bending moment deflection, and detecting the real reliability of the test data omega.
The method further solves the problem that in the fifth step, the theoretical calculated value of the bending moment deflection is represented by a bending moment deflection theoretical formula
Measuring; in the formula, P (t) represents the corresponding load of a concrete column test piece, E represents the center distance, l represents the length of the concrete column test piece, E represents the elastic modulus, and I represents the section inertia moment.
The invention has the beneficial effects that:
according to the adjustable and detachable large-eccentricity compression column testing device and method, when a concrete column test piece is tested, the corbel loading end does not need to be poured, the fixing effect of the corbel loading end is realized by installing and detaching steel plates and loading steel plates at two ends, the steel plates can be detached and recycled, and the device can be used for loading a concrete column poured and maintained in a test room and also can be used for loading and detaching a component column in engineering, so that the testing device has the advantages of energy conservation, emission reduction and cost saving, and the tested test piece is from a real working condition, so that the testing data is reliable and real, and the application range is wide.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the invention.
FIG. 2 is a schematic diagram of a concrete column test piece structure according to the present invention.
Fig. 3 is a schematic structural view of the disassembled steel plate of the invention.
FIG. 4 is a schematic front view of the disassembled steel plate of the present invention.
FIG. 5 is a schematic structural diagram of the loading steel plate according to the present invention.
FIG. 6 is a schematic structural view of an L-shaped steel sheet according to the present invention.
The serial number in the figure, 1-concrete column test piece, 2-disassembly steel plate, 3-loading steel plate, 4-strain gauge, 5-static signal analysis system, 6-computer, 7-material testing machine, 8-controller, 9-hydraulic oil pump, 10-force sensor, 11-movable hinged support, 12-displacement meter, 13-magnetic gauge stand, 14-steel rod, 15-bolt hole, 16-screw hole, 17-elongated hole, 18-pore channel, 19-I-shaped bayonet, 20-L-shaped steel plate and 21-round hole.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples.
An adjustable detachable large-eccentricity stressed column testing device is shown in figure 1 and comprises a concrete column test piece 1, a detachable steel plate 2, a loading steel plate 3, a pressure loading unit, a displacement testing unit, a strain gauge 4, a static signal analysis system 5 and a computer 6; the concrete column test piece 1 is positioned between the upper loading steel plate and the lower loading steel plate of the pressure loading unit, the end parts of two sides of the concrete column test piece 1 are provided with dismounting steel plates 2, and the other end of each dismounting steel plate 2 is provided with a loading steel plate 3; the displacement testing unit is connected with the concrete column test piece 1 through a steel wire, and the other end of the displacement testing unit is connected with a signal receiving end of the static signal analysis system 5 through a signal wire; the strain gauge 4 is adhered to the surface of the concrete column test piece 1, and the other end of the strain gauge is connected with a signal receiving end of a static signal analysis system 5 through a signal wire; the static signal analysis system 5 is connected with a computer 6;
the pressure loading unit consists of a material testing machine 7, a controller 8, a hydraulic oil pump 9, a force sensor 10 and a movable hinged support 11, one end of the controller 8 is connected with the computer 6, the other end of the controller is connected with the material testing machine 7 through the hydraulic oil pump 9, the force sensor 10 is installed at the end part of the material testing machine 7, and an upper loading steel plate and a lower loading steel plate of the material testing machine 7 are connected with the loading steel plate 3 through the movable hinged support 11;
the displacement testing unit consists of a displacement meter 12, a magnetic meter base 13 and a steel rod 14; the lower part of the steel rod 14 is fixedly connected with the ground, the upper part of the steel rod 14 is provided with a magnetic gauge stand 13, one end of the magnetic gauge stand 13 is connected with a displacement meter 12, one end of the displacement meter 12 is connected with the side surface of the concrete column test piece 1 through a steel wire, and the other end of the displacement meter is connected with a signal receiving end of the static signal analysis system 5 through a signal wire.
In this embodiment, referring to fig. 2, the concrete column test piece 1 is connected to the detachable steel plate 2 through a bolt, and bolt holes 15 are formed in end faces of two ends of the concrete column test piece.
In the embodiment, referring to fig. 3-4, the disassembled steel plate 2 is composed of four steel plates, and the four steel plates correspond to each other two by two; screw holes 16 aligned with the end faces of the concrete column test piece 1 are formed in the front steel plate and the rear steel plate, and the steel plates 2 are disassembled and fixed by penetrating bolt rods; the surfaces of the front and the rear steel plates are also provided with corresponding strip-shaped holes 17, and the steel plates on the left and the right sides penetrate through the strip-shaped holes 17 to form a box-shaped structure with the front and the rear steel plates; the upper ends of the front and rear dry plates are provided with a pore passage 18, and the loading steel plate 3 penetrates through the pore passage 18 to be fixedly connected with the disassembling steel plate 2.
In this embodiment, the surface of the loading steel plate 3 is provided with scales for centering the movable hinged support 11; the side of loading steel sheet 3 is equipped with a plurality of I shape bayonet sockets 19, when loading steel sheet 3 passed the pore 18 of dismantling the steel sheet 2 upper end, pass corresponding I shape steel card strip in the I shape bayonet socket 19 for loading steel sheet 3 with dismantle the fixed connection of steel sheet 2.
In this embodiment, referring to fig. 5, there are 3 i-shaped bayonets 19.
In this embodiment, referring to fig. 6, the number of the magnetic gauge bases 13 is 5, the magnetic gauge bases are vertically arranged from top to bottom along the end portion of the steel rod 14, the number of the displacement meters 12 is 5, an L-shaped steel sheet 20 is arranged at the joint of the displacement meter 12 and the concrete column test piece 1, the vertical surface of the L-shaped steel sheet 20 is adhered to the side surface of the concrete column test piece, a circular hole 21 is formed in the horizontal surface of the L-shaped steel sheet 20, and a steel wire penetrates through the circular hole 21 and is connected with one end of the displacement meter 12.
In this embodiment, a concrete rectangular test block is poured on the lower portion of the steel rod 14, and the concrete rectangular test block is embedded in the ground and used for fixing the steel rod 14.
The method for testing by using the device comprises the following steps: taking 4 concrete column test pieces with the section size of 200mm multiplied by 200mm for testing.
Firstly, flatly placing a concrete column test piece on the ground, aligning a disassembled steel plate with screw holes with bolt holes at two ends of the concrete column test piece and fixedly connecting the disassembled steel plate with the bolt holes through bolts, then taking a side steel plate to enable the side steel plate to penetrate through a long-strip-shaped hole in the surface of an installed steel plate, enabling a loading steel plate to penetrate through a pore channel at the end part of the disassembled steel plate, and installing an I-shaped steel clamping strip at an I-shaped bayonet of the loading steel plate;
secondly, mounting a force sensor at the end part of the material testing machine, mounting movable hinged supports on the end surfaces of upper and lower loading steel plates of the material testing machine, and mounting the concrete column test piece loaded in the step one between the upper and lower movable hinged supports to connect the movable hinged supports with the surface of the loading steel plate, wherein the movable hinged supports are centered through scales on the loading steel plate;
step three, mounting the steel rod and the magnetic gauge stand at fixed positions, and pouring a concrete rectangular test block at the bottom of the steel rod and embedding the concrete rectangular test block in the ground; then, attaching the vertical surface of the L-shaped steel sheet to the side surface of a concrete column test piece, penetrating a steel wire in a circular hole in the horizontal plane of the L-shaped steel sheet, and connecting the other end of the steel wire with a displacement meter; uniformly sticking the strain gauge to the side surface of the concrete column test piece; finally, the displacement meter, the strain gauge and the force sensor are connected with a static signal analysis system through signal wires, and the static signal analysis system is connected with a computer;
opening a computer to manufacture a controller, and further controlling a material testing machine by the controller to load stress on two ends of the concrete column test piece by the material testing machine; the static signal analysis system records the deflection omega of the concrete column test piece in the loading process, the strain delta epsilon (t) of concrete on the surface of the concrete column test piece and the corresponding load P (t) of the concrete column test piece during corresponding displacement and strain;
step five, comparing the deflection omega of the concrete column test piece measured in the step four with a bending moment deflection theoretical calculation value, and detecting the real reliability of test data omega; the theoretical calculation value of the bending moment deflection is represented by a bending moment deflection theoretical formula
Measuring; in the formula, P (t) represents the corresponding load of a concrete column test piece, E represents the center distance, l represents the length of the concrete column test piece, E represents the elastic modulus, and I represents the section inertia moment; the specific data are shown in Table 1.
TABLE 1
The error between the experimental value and the theoretical value measured by the device is less than 5 percent, so the data measured by the device is real and reliable.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (7)
1. The utility model provides an adjustable detachable big off-centre pressed post testing arrangement which characterized in that: the device comprises a concrete column test piece (1), a dismounting steel plate (2), a loading steel plate (3), a pressure loading unit, a displacement testing unit, a strain gauge (4), a static signal analysis system (5) and a computer (6); the concrete column test piece (1) is positioned between the upper loading steel plate and the lower loading steel plate of the pressure loading unit, the end parts of two sides of the concrete column test piece (1) are provided with the dismounting steel plates (2), and the other ends of the dismounting steel plates (2) are provided with the loading steel plates (3); the displacement testing unit is connected with a concrete column test piece (1) through a steel wire, and the other end of the displacement testing unit is connected with a signal receiving end of a static signal analysis system (5) through a signal wire; the strain gauge (4) is adhered to the surface of the concrete column test piece (1), and the other end of the strain gauge is connected with a signal receiving end of a static signal analysis system (5) through a signal wire; the static signal analysis system (5) is connected with a computer (6); the pressure loading unit consists of a material testing machine (7), a controller (8), a hydraulic oil pump (9), a force sensor (10) and a movable hinged support (11), one end of the controller (8) is connected with the computer (6), the other end of the controller is connected with the material testing machine (7) through the hydraulic oil pump (9), the force sensor (10) is installed at the end part of the material testing machine (7), and an upper loading steel plate and a lower loading steel plate of the material testing machine (7) are connected with the loading steel plate (3) through the movable hinged support (11); the displacement testing unit consists of a displacement meter (12), a magnetic meter seat (13) and a steel rod (14); the lower part of the steel rod (14) is fixedly connected with the ground, the upper part of the steel rod (14) is provided with a magnetic gauge stand (13), one end of the magnetic gauge stand (13) is connected with a displacement meter (12), one end of the displacement meter (12) is connected with the side surface of the concrete column test piece (1) through a steel wire, and the other end of the displacement meter is connected with a signal receiving end of a static signal analysis system (5) through a signal wire;
the concrete column test piece (1) is connected with the disassembling steel plate (2) through bolts, and bolt holes (15) are arranged on the front and back surfaces of the two opposite ends of the concrete column test piece;
the disassembly steel plate (2) consists of four steel plates, and the four steel plates correspond to each other in pairs; screw holes (16) aligned with the end faces of the concrete column test piece (1) are formed in the front steel plate and the rear steel plate, and the steel plates (2) are disassembled and fixed by penetrating bolt rods; the surfaces of the front and the rear steel plates are also provided with corresponding strip-shaped holes (17), and the steel plates on the left and the right sides penetrate through the strip-shaped holes (17) to form a box-shaped structure with the front and the rear steel plates; the upper ends of the front and rear steel plates are provided with pore canals (18), and the loading steel plate (3) penetrates through the pore canals (18) to be fixedly connected with the disassembly steel plate (2).
2. The adjustable and detachable large eccentric compression column testing device as claimed in claim 1, wherein: scales are arranged on the surface of the loading steel plate (3) and used for centering the movable hinged support (11); the side of loading steel sheet (3) is equipped with a plurality of I shape bayonet sockets (19), loading steel sheet (3) pass when dismantling pore (18) of steel sheet (2) upper end, pass corresponding I shape steel card strip in I shape bayonet socket (19) for loading steel sheet (3) and the fixed connection who dismantles steel sheet (2).
3. The adjustable and detachable large eccentric compression column testing device as claimed in claim 2, wherein: the number of the I-shaped bayonets (19) is 3.
4. The adjustable and detachable large eccentric compression column testing device as claimed in claim 2, wherein: magnetism gauge stand (13) are equipped with 5, follow steel pole (14) tip from last vertical setting down, displacement meter (12) correspondence is equipped with 5, and displacement meter (12) are equipped with L shaped steel piece (20) with the junction of concrete column test piece (1), the vertical face of L shaped steel piece (20) is pasted with the side of concrete column test piece and is connected, is equipped with round hole (21) on the horizontal plane of L shaped steel piece (20), and the steel wire passes round hole (21) is connected with the one end of displacement meter (12).
5. The adjustable and detachable large eccentric compression column testing device as claimed in claim 4, wherein: and a concrete rectangular test block is poured at the lower part of the steel rod (14), and the concrete rectangular test block is pre-buried in the ground and used for fixing the steel rod (14).
6. A testing method of the adjustable and detachable large eccentric compression column testing device of claim 5 is characterized by comprising the following steps: step one, installing a concrete column test piece loading end: firstly, a concrete column test piece (1) is horizontally placed on the ground, a disassembly steel plate with a screw hole (16) is aligned with bolt holes (15) at two ends of the concrete column test piece and fixedly connected through bolts, then a side steel plate is taken to pass through a long strip-shaped hole (17) on the surface of an installed steel plate, a loading steel plate (3) passes through a hole channel (18) at the end part of the disassembly steel plate (2), and an I-shaped steel clamping strip is installed at an I-shaped bayonet (19) of the loading steel plate (3); step two, assembling a loading device: firstly, a force sensor (10) is installed at the end part of a material testing machine (7), movable hinged supports (11) are installed on the end faces of upper and lower loading steel plates of the material testing machine, a loaded concrete column test piece (1) is installed between the upper and lower movable hinged supports (11), the movable hinged supports (11) are connected with the surface of the loading steel plate (3), and the movable hinged supports (11) are centered through scales on the loading steel plate (3); step three, connecting a testing device: firstly, a steel rod (14) and a magnetic gauge stand (13) are installed at fixed positions, then the vertical surface of an L-shaped steel sheet (20) is attached to the side surface of a concrete column test piece (1), a steel wire penetrates through a round hole (21) in the horizontal plane of the L-shaped steel sheet (20), and the other end of the steel wire is connected with a displacement meter (12); then uniformly sticking the strain gauge (4) to the side surface of the concrete column test piece; finally, the displacement meter (12), the strain gauge (4) and the force sensor (10) are connected with a static signal analysis system (5) through steel wires, and the static signal analysis system (5) is connected with a computer (6); opening a computer to control the controller (8), and further controlling the material testing machine (7) by the controller (8) to enable the material testing machine (7) to carry out stress loading on two ends of the concrete column test piece (1); the static signal analysis system (5) records the deflection omega of the concrete column test piece in the loading process, the strain delta epsilon (t) of concrete on the surface of the concrete column test piece and the corresponding load P (t) of the concrete column test piece during corresponding displacement and strain; and step five, comparing the deflection omega of the concrete column test piece measured in the step four with the theoretical calculated value of bending moment deflection, and detecting the real reliability of the test data omega.
7. The testing method of the adjustable detachable large eccentric compression column testing device according to claim 6, characterized in that: in the fifth step, the theoretical calculation value of the bending moment deflection is represented by a bending moment deflection theoretical formula
Measuring; in the formula, P (t) represents the corresponding load of a concrete column test piece, E represents the center distance, l represents the length of the concrete column test piece, E represents the elastic modulus, and I represents the section inertia moment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811055180.8A CN109163979B (en) | 2018-09-11 | 2018-09-11 | Adjustable detachable large-eccentricity pressed column testing device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811055180.8A CN109163979B (en) | 2018-09-11 | 2018-09-11 | Adjustable detachable large-eccentricity pressed column testing device and method |
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| CN109163979A CN109163979A (en) | 2019-01-08 |
| CN109163979B true CN109163979B (en) | 2021-03-16 |
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| CN110455867B (en) * | 2019-07-16 | 2022-02-15 | 黑龙江八一农垦大学 | Boundary recognition device and method for core concrete confinement area of square steel tube concrete column |
| CN111380754A (en) * | 2020-05-12 | 2020-07-07 | 广东工业大学 | Slot type bias voltage experimental device |
| CN113358464A (en) * | 2021-05-23 | 2021-09-07 | 北京工业大学 | Force measuring device under reinforced concrete slab column structure column and calibration kit |
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