CN213749323U - Steel pipe concrete presses-twists experimental loading device - Google Patents
Steel pipe concrete presses-twists experimental loading device Download PDFInfo
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- CN213749323U CN213749323U CN202022152569.3U CN202022152569U CN213749323U CN 213749323 U CN213749323 U CN 213749323U CN 202022152569 U CN202022152569 U CN 202022152569U CN 213749323 U CN213749323 U CN 213749323U
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Abstract
The utility model provides a steel pipe concrete presses-experimental loading device of turning round, belongs to structural engineering technical field, including vertical reaction frame, vertical displacement meter, axle pressure jack, load beam, level to ball bearing, hawser, the circular arm of force etc, swing joint about load beam and the vertical reaction frame inside wall, vertical displacement meter links to each other with the load beam, the circular arm of force transversely links to each other through the hawser with horizontal jack, sets up the steel pipe concrete test piece that awaits measuring between circular arm of force and the fixing support. The utility model discloses a vertical axle load jack is applyed the axle pressure, and the jack through two horizontal directions is applyed simultaneously and is twistd reverse, and the level to two jacks pass through the hawser and drive the circular arm of force rotatory and then realize the application of moment of torsion. The force generated by the three jacks is measured through the load sensor, and the axial deformation and the torsional deformation of the test piece in the vertical direction are observed through the three displacement meters, so that the compression-torsion mechanical property of the concrete-filled steel tubular column is analyzed.
Description
Technical Field
The utility model belongs to the technical field of structural engineering, concretely relates to steel pipe concrete presses-turns round experimental loading device.
Background
In recent years, with the rapid development of infrastructure construction, building structures gradually develop towards high rise, large span and heavy load bearing directions, more and more buildings adopt steel pipe concrete structures, under the action of earthquake or wind load, the building structures are stressed complexly and can also be subjected to the action of torque besides axial compression, so that the mechanical properties of the steel pipe concrete structures under the combined stress of compression and torsion need to be researched. A great deal of research on the mechanical properties of the steel pipe concrete has been carried out at home and abroad, and the research on the compression-torsion properties of the steel pipe concrete mainly focuses on the aspects of bearing capacity, torsional rigidity and the like. And famous researchers (such as Zhou dao hong, Han Lin Hai and the like) in the domestic multi-site combined structure field all carry out the research on the concrete filled steel tube piezoelectric property, reflect the mechanical property of the concrete filled steel tube structure through a piezoelectric-torsional test, and provide reference for the design of the concrete filled steel tube column.
Although there are related studies, there are several problems as follows: 1. the pile body has larger deformation along the axial direction of the pile body in the axial compression process, but jacks for applying torque in the existing test are fixed, and the jacks for applying torque at the end part do not realize the cooperative motion with the test piece, namely after the test piece generates larger axial deformation, a transverse jack and the end part of the test piece are not in the same plane, and the measurement error is larger; 2. most of the existing devices for the steel pipe concrete pressure-torsion test are used for horizontally placing test pieces, and steel pipe concrete columns in actual engineering are vertically placed; 3. in the existing test device for vertically placing the test piece, the torque is applied by pushing (or pulling) a rigid force arm at the end of the test piece through a rigid rod, and the way has larger deviation on the calculation of the torque because the length of the force arm forming the torque is changed and the internal force existing between the rigid rod and the rigid force arm is not considered.
SUMMERY OF THE UTILITY MODEL
Technical problem, the utility model provides a steel pipe concrete is pressed-is turned round experimental loading device is through applying axial force and moment of torsion to the steel pipe concrete test piece, makes it revolve wrong entering soil body, reflects steel pipe concrete component mechanical properties's a test device through measuring the vertical and torsional deformation of test piece.
The utility model discloses a realize through following technical scheme:
a steel pipe concrete pressure-torsion test loading device comprises a vertical reaction frame, a vertical displacement meter, an axial pressure jack, a loading beam, a horizontal ball bearing, a cable, a circular force arm, a fixed support, an axial pressure sensor, a thin copper wire, a displacement meter, a horizontal return-shaped reaction frame, a transverse jack and a torque sensor, wherein the vertical displacement meter and the axial pressure jack are arranged at the top of the inner side wall of the vertical reaction frame, the loading beam is arranged below the axial pressure jack, the loading beam and the inner side wall of the vertical reaction frame move up and down relatively, the vertical displacement meter is connected with the loading beam, the middle bottom of the loading beam is longitudinally connected with the circular force arm through the horizontal ball bearing, the circular force arm is transversely connected with the transverse jack through the cable, the cable is tangent to the excircle of the circular force arm, the transverse jack is arranged on the horizontal return-shaped reaction frame, the level is to returning font reaction frame and loading roof beam and linking to each other, reciprocates along vertical reaction frame inside wall along with loading roof beam is together, the level is equipped with the displacement meter to returning font reaction frame, the displacement meter links to each other through thin copper wire to the ball bearing lower part with the level, be equipped with the axle pressure sensor on the axle pressure jack, be equipped with torque sensor on the horizontal jack, the below bottom of the circular arm of force is equipped with fixing support, sets up the steel pipe concrete test piece that awaits measuring between circular arm of force and the fixing support.
Furthermore, the loading beam, the side wall of the horizontal return-shaped reaction frame and the inner side wall of the vertical reaction frame are connected through a vertical ball hinge, and a suspension rope is arranged between the top of the loading beam and the top of the inner side wall of the vertical reaction frame.
Furthermore, an outer side channel is arranged on the side wall of the excircle of the circular force arm, and the cable is arranged in the outer side channel and is tangent to the excircle of the circular force arm.
Furthermore, an embedding groove is formed in the bottom of the circular force arm, a fixing groove is formed in the top of the fixing support, and the concrete filled steel tube test piece to be tested is embedded into the embedding groove in the bottom of the circular force arm and the fixing groove in the top of the fixing support.
Furthermore, the embedded groove and the upper end plate of the concrete filled steel tube test piece to be tested are both square.
Furthermore, the ball bearing in the horizontal direction is fixed between the loading beam and the circular force arm through the annular groove.
The utility model has the advantages and effects that:
1. the utility model discloses set up the load beam, through returning font reaction frame welding with the load beam with the level to put up its both ends and vertical reaction and pass through the ball hinge and be connected, make circular arm of force, test piece, displacement meter, level to the synchronous vertical downstream of jack homoenergetic.
2. The torque is applied not by pushing a rigid force arm but by pulling a flexible cable, and the stress direction of the cable is always tangent to a circular force arm, namely the radius of the disc is the length of the force arm when the torque is calculated.
3. The test piece is placed vertically, and the stress form of the test piece is better close to the actual building structure column.
The utility model discloses a vertical axle load jack is applyed the axle pressure, and the jack through two horizontal directions is applyed simultaneously and is twistd reverse, and the level to two jacks pass through the hawser and drive the circular arm of force rotatory and then realize the application of moment of torsion. The force generated by the three jacks is measured through the load sensor, and the axial deformation and the torsional deformation of the test piece in the vertical direction are observed through the three displacement meters, so that the compression-torsion mechanical property of the concrete-filled steel tubular column is analyzed.
Drawings
FIG. 1 is a front view of a loading device for a steel pipe concrete compression-torsion test;
FIG. 2 is a top view of a loading device for a steel pipe concrete compression-torsion test, with a ball bearing center as a cross section;
FIG. 3 is a schematic top view of a circular force arm;
FIG. 4 is a schematic view of a circular force arm;
FIG. 5 is a schematic diagram of a horizontal ball bearing in a top view;
FIG. 6 is a schematic view of a front view of a ball bearing in a horizontal direction;
FIG. 7 is a schematic top view of a vertical ball hinge;
fig. 8 is a schematic view of a vertical ball hinge in elevation.
In the figure: 1-vertical reaction frame; 2-a vertical displacement meter; 3-axial compression jack; 4-hanging ropes; 5-a loading beam; 6-horizontal ball bearing; 7-a cable; 8-circular force arm; 9-test piece; 10-fixing a support; 11-axial pressure sensor; 12-vertical ball hinge; 13-fine copper wire; 14-a displacement meter; 15-horizontal reverse force frame; 16-a transverse jack; 17-a torque sensor; 18-caulking groove.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
A steel pipe concrete pressure-torsion test loading device comprises a transverse jack, a circular force arm, an axial pressure jack, a reaction frame, a loading beam, a ball bearing, a cable, a circular force arm, a horizontal return-shaped reaction frame, an axial pressure sensor, a torque sensor and a displacement meter; the steel pipe concrete test piece is vertically arranged on the fixed support, axial pressure is applied through the vertical axial pressure jacks, torsion is applied through the two transverse jacks, the two transverse jacks drive the circular force arm to rotate through the mooring rope, so that torque is applied, the force generated by the three jacks is measured through the load sensor, the torsional deformation of the test piece is measured through the displacement meter, strain at different positions of the test piece can be measured through the strain gauge if necessary, and the torsional bearing capacity and the torsional rigidity of the steel pipe concrete under different axial pressures are analyzed.
As shown in fig. 1-8, a steel pipe concrete pressure-torsion test loading device comprises a vertical reaction frame, a vertical jack, a horizontal jack, a loading beam, a ball hinge, a rigid rotating shaft, a cable, a circular force arm, a horizontal reversed-square-shaped reaction frame, a shaft pressure sensor, a torque sensor and a displacement meter, wherein the lower end of a test piece 9 is embedded into a fixed support 10, the upper end of the test piece is embedded into an embedding groove 18 at the lower part of the circular force arm, and the embedding groove 18 and an upper end plate of the test piece 9 are both square. The ball bearing 6 in the horizontal direction is fixed between the loading beam 5 and the circular force arm 8 through an annular groove. The horizontal return-shaped reaction frame 15 is welded on the loading beam 5 and is connected with the vertical reaction frame 1 through a vertical ball hinge 12, so that the loading beam 5 and the horizontal return-shaped reaction frame 15 can move in the vertical direction. The axial compression jack 3 acts directly on the load beam 5. The two transverse jacks are fixed on a return-shaped reaction frame 15 and are connected with a circular force arm 8 through a cable 7, and the cable 7 is placed in a channel on the outer side of the circular force arm 8, so that the cable 7 is always tangent to the circular force arm 8 in the rotating process of the circular force arm 8. The vertical jacks 3 are provided with axial pressure sensors 11, and the two horizontal jacks are provided with torque sensors 17. And a displacement meter 14 is arranged on the clip-shaped reaction frame 15, the displacement meter 14 is connected with the lower part of the ball bearing 6 by using a thin copper wire 13, and the movement track of the thin copper wire 13 is ensured to be tangent to the edge of the ball bearing 6 when the ball bearing 6 rotates along with the force arm, so that the torsion angle of the test piece 9 is measured.
The transverse jack 16 is fixed on a horizontal reversed-square reaction frame 15, and drives the circular force arm 8 to rotate through the mooring rope 7, so that the torsion process of the test piece 9 is realized. In the loading process, the mooring rope 7 is always positioned in the outer side channel of the circular force arm 8, namely the tension direction borne by the mooring rope 7 is always vertical to the radius direction of the circular force arm 8.
And during loading, the suspension rope 4 for suspending the loading beam 5 is loosened, so that the loading beam 5 and the horizontal return-shaped reaction frame 15 can freely move in the vertical direction, and the two transverse jacks 16 and the test piece 9 synchronously move downwards in the loading process through the loading beam 5.
The horizontal back-shaped reaction frame 15 has enough rigidity to ensure that the horizontal back-shaped reaction frame 15 does not deform while the two transverse jacks 16 apply tension.
The utility model discloses the technical problem who solves: 1. the synchronous vertical downward movement of the transverse jack and the displacement meter and the test piece is realized, so that the transverse jack and the end part of the test piece are always in the same plane, and the accuracy of the measured torque is ensured; 2. the application of torque is not achieved by a rigid moment arm push, but by a flexible cable pulling a circular moment arm.
The technical problems to be solved are respectively solved by the following modes:
for technical problem 1: the transverse jack is fixed on the square-clip-shaped reaction frame in the horizontal direction, one end of the mooring rope is connected to the sensor of the transverse jack, the other end of the mooring rope is fixed on the circular force arm after winding the circumference of the circular force arm 1/4, and the circular force arm is driven to rotate by applying pulling force to the mooring rope, so that torque is applied. Meanwhile, the square-shaped reaction frame is welded with the loading beam, two ends of the square-shaped reaction frame are connected with the vertical reaction frame through the ball hinges, the square-shaped reaction frame can only vertically roll along the vertical reaction frame, and vertical force is directly applied to the loading beam, so that the transverse jack and a test piece can simultaneously move downwards in the loading process, and the torque and the test piece end plate are always in the same plane.
For technical problem 2: the fixed support at the lower end is anchored on the bottom plate of the reaction frame, the lower end of the test piece is embedded into the square embedding groove at the top of the fixed support, and a circular force arm and a transverse jack are adopted to apply torque, so that the stress form of the column in the field of practical engineering is better reflected.
For technical problem 3: the loading beam drives the back-shaped reaction frame to vertically move downwards, so that the circular force arm and the horizontal jack are always positioned on the same horizontal plane. The circular force arm is driven to rotate through the cable so as to apply torque, one end of the cable is fixed in a buckle of the force arm after bypassing the circumference of the force arm 1/4, the other end of the cable is connected with the sensor, the cable is guaranteed to be embedded and fixed in a channel on the outer side of the force arm in the loading process, the stress direction of the cable is guaranteed to be tangent to the circular force arm all the time, and the radius of the disc is the length value of the force arm when the torque is calculated.
Example 1
A steel pipe concrete pressure-torsion test loading device. The lower end of a steel pipe concrete pressure-torsion test piece 9 is fixed on a fixed support 10 with a square embedded groove, the upper end of the steel pipe concrete pressure-torsion test piece is fixed in an embedded groove 17, a load is applied to a loading beam 5 through a vertical jack 3, the loading beam 5 is connected with a circular force arm 8 through a ball bearing 6 to drive the test piece 9 to move vertically downwards, the loading beam 5 is welded with a horizontal return-shaped reaction frame 15, and two ends of the loading beam are connected to the vertical reaction frame 1 through vertical ball hinges 12, so that the loading beam 5 and the horizontal return-shaped reaction frame 15 can both move up and down. The transverse jack 16 and the displacement meter 14 are fixed on a horizontal reversed-square-shaped reaction frame 15, when the axial pressure jack 3 applies a load to the loading beam 5, the transverse jack 16 and the displacement meter 14 can both move downwards, the circular force arm 8, the transverse jack 16 and the displacement meter 14 are ensured to be in the same horizontal plane, the transverse jack 16 applies a pulling force to the cable 7 to drive the circular force arm 8 to rotate, further, a torque is applied to the test piece 9, the axial force applied to the loading beam 5 by the axial pressure jack 3 is measured through the vertical axial pressure sensor 11, the resultant force generated by the self-weights of the components such as the loading beam and the like is the axial force applied to the test piece 9, the torque applied to the circular force arm 8 by the transverse jack 16 is measured through the torque sensor 17, and the torque applied to the test piece 9 is obtained through conversion. Meanwhile, the angular deformation of the test piece is measured by the displacement meter 14, and the axial deformation of the test piece is measured by the vertical displacement meter 2.
The loading principle is adopted to research the compression-torsion mechanical property of the steel pipe concrete, and the method is carried out according to the following steps:
1. placing a test piece 9, fixing the lower end of the test piece 9 on a fixed support 10 with a square caulking groove, fixing the upper end of the test piece 9 in a caulking groove 18 connected with a circular force arm 8, and lapping measurement equipment such as a displacement meter 14, a thin copper wire 13, a shaft pressure sensor 11, a torque sensor 17 and the like.
2. The suspension rope 4 is unfastened, and the cable 7 is placed in a channel at the outer side of the circular force arm 8, so that the force arm 8 and the transverse jack 16 are ensured to be in the same horizontal plane, and the cable 7 is prevented from being separated from the channel to cause danger.
3. Load is applied to the loading beam 5 through the axial compression jack 3, meanwhile, the horizontal jack 16 applies pulling force to the mooring rope 7 to drive the circular force arm 8 to rotate, and then torque is applied to the test piece 9.
4. The degree of test loading is controlled and when to unload is determined based on the readings of the torque sensor 17, the axle pressure sensor 11 and the displacement gauge 14.
5. Unloading, hanging the loading beam and other parts by using the suspension ropes 4, and taking out the test piece 9.
The utility model discloses a specific loading device is connected to back font reaction frame 15 with the level through loading roof beam 5, has realized that horizontal jack 16, circular arm of force 8, displacement meter 14 homoenergetic and test piece 9 are vertical downstream in step. In addition, strain gauges can be adhered to the surface of the test piece according to needs, so that the strain of the test piece at different positions can be measured.
Claims (6)
1. The utility model provides a steel pipe concrete presses-twists experimental loading device which characterized in that: comprises a vertical reaction frame (1), a vertical displacement meter (2), an axial compression jack (3), a loading beam (5), a horizontal ball bearing (6), a mooring rope (7), a circular force arm (8), a fixed support (10), an axial compression sensor (11), a thin copper wire (13), a displacement meter (14), a horizontal return-shaped reaction frame (15), a transverse jack (16) and a torque sensor (17), wherein the vertical displacement meter (2) and the axial compression jack (3) are arranged at the top of the inner side wall of the vertical reaction frame (1), the loading beam (5) is arranged below the axial compression jack (3), the loading beam (5) and the inner side wall of the vertical reaction frame (1) move up and down relatively, the vertical displacement meter (2) is connected with the loading beam (5), the middle bottom of the loading beam (5) is longitudinally connected with the circular force arm (8) through the horizontal ball bearing (6), the circular force arm (8) is transversely connected with a transverse jack (16) through a cable (7), the mooring rope (7) is tangent with the excircle of the circular force arm (8), the transverse jack (16) is arranged on the horizontal reversed force frame (15), the horizontal return-shaped reaction frame (15) is connected with the loading beam (5) and moves up and down along the inner side wall of the vertical reaction frame (1) along with the loading beam (5), a displacement meter (14) is arranged on the horizontal return-shaped reaction frame (15), the displacement meter (14) is connected with the lower part of the horizontal ball bearing (6) through a thin copper wire (13), the axial pressure jack (3) is provided with an axial pressure sensor (11), the transverse jack (16) is provided with a torque sensor (17), a fixed support (10) is arranged at the bottom of the lower portion of the circular force arm (8), and a steel pipe concrete test piece to be tested is arranged between the circular force arm (8) and the fixed support (10).
2. The steel pipe concrete pressure-torsion test loading device according to claim 1, characterized in that: the loading beam (5), the side wall of the horizontal reverse-shaped reaction frame (15) and the inner side wall of the vertical reaction frame (1) are connected through a vertical ball hinge (12), and a suspension rope (4) is arranged between the top of the loading beam (5) and the top of the inner side wall of the vertical reaction frame (1).
3. The steel pipe concrete pressure-torsion test loading device according to claim 1, characterized in that: the circular force arm (8) is provided with an outer side channel on the outer side wall, and the mooring rope (7) is arranged in the outer side channel and tangent to the outer circle of the circular force arm (8).
4. The steel pipe concrete pressure-torsion test loading device according to claim 1, characterized in that: the steel pipe concrete test piece embedding device is characterized in that an embedding groove (18) is formed in the bottom of the circular force arm (8), a fixing groove is formed in the top of the fixing support (10), and a steel pipe concrete test piece to be tested is embedded into the embedding groove (18) in the bottom of the circular force arm (8) and the fixing groove in the top of the fixing support (10).
5. The steel pipe concrete pressure-torsion test loading device according to claim 4, characterized in that: the embedded groove (18) and the upper end plate of the concrete filled steel tube test piece to be tested are both square.
6. The steel pipe concrete pressure-torsion test loading device according to claim 1, characterized in that: the horizontal ball bearing (6) is fixed between the loading beam (5) and the circular force arm (8) through an annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022152569.3U CN213749323U (en) | 2020-09-27 | 2020-09-27 | Steel pipe concrete presses-twists experimental loading device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022152569.3U CN213749323U (en) | 2020-09-27 | 2020-09-27 | Steel pipe concrete presses-twists experimental loading device |
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| CN213749323U true CN213749323U (en) | 2021-07-20 |
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| CN202022152569.3U Expired - Fee Related CN213749323U (en) | 2020-09-27 | 2020-09-27 | Steel pipe concrete presses-twists experimental loading device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607570A (en) * | 2021-07-27 | 2021-11-05 | 桂林理工大学 | Buckling test device and method for reinforced cylindrical bent plate |
| CN114184378A (en) * | 2021-12-02 | 2022-03-15 | 江苏心源航空科技有限公司 | Declination axis static torsion test bed |
| CN114527015A (en) * | 2022-02-14 | 2022-05-24 | 哈尔滨工业大学 | Pure torsion creep test device suitable for various sizes of combined components and test method thereof |
| CN114544346A (en) * | 2022-02-23 | 2022-05-27 | 北京市市政二建设工程有限责任公司 | Novel bidirectional loading test device for corrugated steel structure |
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2020
- 2020-09-27 CN CN202022152569.3U patent/CN213749323U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607570A (en) * | 2021-07-27 | 2021-11-05 | 桂林理工大学 | Buckling test device and method for reinforced cylindrical bent plate |
| CN113607570B (en) * | 2021-07-27 | 2023-07-04 | 桂林理工大学 | Reinforced cylindrical curved plate buckling test device and method |
| CN114184378A (en) * | 2021-12-02 | 2022-03-15 | 江苏心源航空科技有限公司 | Declination axis static torsion test bed |
| CN114527015A (en) * | 2022-02-14 | 2022-05-24 | 哈尔滨工业大学 | Pure torsion creep test device suitable for various sizes of combined components and test method thereof |
| CN114527015B (en) * | 2022-02-14 | 2023-11-10 | 哈尔滨工业大学 | Pure torsion creep test device suitable for multiple-size combined components and test method thereof |
| CN114544346A (en) * | 2022-02-23 | 2022-05-27 | 北京市市政二建设工程有限责任公司 | Novel bidirectional loading test device for corrugated steel structure |
| CN114544346B (en) * | 2022-02-23 | 2024-04-05 | 北京市市政二建设工程有限责任公司 | Bidirectional loading test device for corrugated steel structure |
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