CN107179251A - A kind of girder steel constraint torsion experimental rig - Google Patents
A kind of girder steel constraint torsion experimental rig Download PDFInfo
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- CN107179251A CN107179251A CN201710437050.XA CN201710437050A CN107179251A CN 107179251 A CN107179251 A CN 107179251A CN 201710437050 A CN201710437050 A CN 201710437050A CN 107179251 A CN107179251 A CN 107179251A
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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
- G01N3/26—Investigating twisting or coiling properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
Include loading frame the invention discloses a kind of girder steel constraint torsion experimental rig, reverse cylinder, hollow plunger synchronous hydra-ulic jacks, folder bearing and steel wire rope, the two ends of described loading frame are respectively equipped with folder bearing, folder bearing is fixed on pedestal, described loading frame is provided with hollow plunger synchronous hydra-ulic jacks, provided with torsion cylinder in loading frame, reverse the fixture that fixation test beam is provided with cylinder, wherein test beam is through reversing cylinder and it being fixed by the fixture of test beam, and the two ends of test beam have folder bearing to be fixed.The present invention is simple in construction, reasonable in design, and lineoutofservice signal pull direction is tangent with torsion cylinder all the time in the present invention, and the lineoutofservice signal pull of the left and right sides is equal in magnitude in opposite direction, and moment of torsion effect is subjected only to so as to guarantee test beam.
Description
Technical field
The present invention relates to a kind of girder steel constraint torsion experimental rig, belong to long strands field.
Background technology
Reverse as one of five kinds of basic stresses, be particularly to need weight in Bridge Design in the design of girder steel
What point considered.When acting on the shearing on beam not by the centre of shear, beam will twist around the centre of shear.Torsional deflection can
It is divided into FREE TORSION and constraint torsion, both stress states are widely different.Component when reversing generation except circular cross-section is cut
Face is kept outside plane, and other section forms are cut because each fiber on section produces displacement along longitudinal direction and makes surface irregularity
Face is no longer held at plane, produces buckling deformation.If the displacement of each fiber along longitudinal direction is unfettered, for FREE TORSION, only
Free torsional shearing stress is produced, and the rate of change of torsion angle is constant.When component is twisting deformation, one end or two ends
Buckling deformation receive the limitation of constraints, then the deformation in other sections is also by by different degrees of effect of contraction, this
When test specimen occur then be constrained twisting deformability.The buckling deformation in section will produce lonitudinal warping direct stress after suffering restraints, and
Supervene warping shear stress；The rate of change of torsion angle is also no longer constant.As can be seen that the torsional deflection of beam is complex,
Therefore, it is very important to carry out research to mechanical property of the girder steel under moment of torsion effect.
However, at present girder steel by torsional test, tested using applying opposite torques at test beam two ends, this belongs to
The category of FREE TORSION.For constraint torsion, it is desirable to make component each section when reversing by support conditions or the external force mode of action
Buckling deformation suffer restraints.
When acting on the shearing on beam not by the centre of shear, beam will twist around the centre of shear.Torsional deflection can
It is divided into FREE TORSION and constraint torsion, both stress states are widely different, it is significant to carry out torsion test to beam.However,
Current crane torsion test device is FREE TORSION device.
The content of the invention
It is an object of the invention to：A kind of girder steel constraint torsion experimental rig is provided, sticking up for each section of test beam can be made
Song deformation is brought it about constrained twisting deformability by different degrees of constraint, so that lonitudinal warping direct stress is produced, and with production
Raw warping shear stress.
The technical solution adopted in the present invention is：A kind of girder steel constraint torsion experimental rig, including loading frame, torsion circle
Cylinder, hollow plunger synchronous hydra-ulic jacks, folder bearing and steel wire rope, the two ends of described loading frame are respectively equipped with folder bearing, press from both sides
Bearing is fixed on pedestal, and described loading frame is provided with hollow plunger synchronous hydra-ulic jacks, loading frame provided with torsion circle
Cylinder, reverse cylinder in be provided with fixation test beam fixture, wherein test beam through reverse cylinder and by test beam fixture to it
It is fixed, the two ends of test beam have folder bearing to be fixed.
In the present invention：Described loading frame includes being provided between two columns and upper and lower reaction beam, two described columns
Upper and lower reaction beam, described torsion cylinder is fixed on the position between upper and lower reaction beam, wherein described column is by steel pipe structure
Into described reaction beam is welded by two blocks of steel plates one to be further applied load for hollow plunger synchronous hydra-ulic jacks.
In the present invention：Described folder bearing includes being provided with upper and lower branch between two pillars and upper and lower support bar, two pillars
Strut, the upper and lower support bar told is welded by two round steel pipes two, two blocks of steel plates two and a smooth round steel.
In the present invention：Two cylinders that two concentric radius that described torsion cylinder include are not waited are inner cylinder and outer barrel,
By ribbed stiffener plate weld between inner cylinder and outer barrel, the upper and lower cylinder face of described outer barrel is welded by the round steel of fixed steel wire rope
Guan Yi, the forward and backward nozzle of described outer barrel is equipped with annulus；The fixture of fixation test beam is provided with described inner cylinder, it is described solid
The fixture for determining test beam is made up of six roots of sensation high-strength bolt bar and plate.
In the present invention：Described steel wire rope bypasses outer barrel and tangentially extended, with the horizontal position of a fixed steel wire rope
The slab base of hollow plunger synchronous hydra-ulic jacks, described hollow plunger synchronous hydra-ulic jacks are placed in the slab formation put
It is placed between reaction beam and slab base, described slab base is provided with the corresponding breach of fixed steel wire rope.
Beneficial effects of the present invention：
1st, the present invention is simple in construction, reasonable in design, and lineoutofservice signal pull direction is tangent with torsion cylinder all the time in the present invention, and left
The lineoutofservice signal pull of right both sides is equal in magnitude in opposite direction, and moment of torsion effect is subjected only to so as to guarantee test beam；
2nd, the corner of test beam span centre of the invention is zero, i.e. warpage does not occur for section, it is ensured that the rotation for reversing cylinder is put down
Stability, and the security of stretch-draw jack can be improved；
3rd, the rotational freedom at the effective limit assay beam two ends of present invention energy, makes test beam from end section to middle each section
Deformation is by different degrees of constraint, so that constrained twisting deformability occurs for test beam.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is that the schematic diagram that cylinder is combined with loading frame is reversed in the present invention；
Fig. 3 is the structural representation of folder bearing in the present invention；
Fig. 4 is the decomposing schematic representation of folder bearing in the present invention；
Fig. 5 is the structural representation of torsion cylinder in the present invention；
Fig. 6 is the structural representation of support bar in the present invention；
Fig. 7 is the combination schematic diagram of torsion cylinder and steel wire rope in the present invention；
Fig. 8 is the result of the test figure of the present invention.
Wherein：1. loading frame；2. reverse cylinder；3. hollow plunger synchronous hydra-ulic jacks；4. press from both sides bearing；5. steel wire rope；
6. pedestal；7. column；8. reaction beam；9. steel plate one；10. steel pipe；11. inner cylinder；12. outer barrel；13. annulus；14. floor of putting more energy into；
15. round steel pipe one；16. shank of bolt；17. plate；18. steel plate two；19. round steel；20. round steel pipe two；21. slab base；22.
Post；23. support bar；24. test beam.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in figs. 1-7, a kind of girder steel constraint torsion experimental rig, including loading frame 1, torsion cylinder 2, hollow plunger are same
Stepped hydraulic jack 3, folder bearing 4 and steel wire rope 5, the two ends of described loading frame 1 are respectively equipped with folder bearing 4, and folder bearing 4 is fixed
On pedestal 6, hollow plunger synchronous hydra-ulic jacks 3, loading frame 2 are equipped with the upper and lower reaction beam 8 of described loading frame 1
Upper and lower reaction beam 8 between provided with cylinder 2 is reversed, reverse the fixture that fixation test beam 24 is provided with cylinder 2, wherein test beam
24 through reversing cylinder 2 and it being fixed by the fixture of test beam, and 24 two ends of test beam have folder bearing 4 to be consolidated
It is fixed.
Described loading frame 1 includes being provided with upper and lower counter-force between two columns 7 and upper and lower reaction beam 8, two described columns 7
Beam 8, described torsion cylinder 2 is fixed on the position between upper and lower reaction beam 8, wherein described column 7 is made up of steel pipe 10,
Described reaction beam 8 is welded by two blocks of steel plates 1 and is further applied load for hollow plunger synchronous hydra-ulic jacks 3；Described folder
Bearing 4 includes being provided with upper and lower support bar 23, the upper and lower support told between two pillars 7 and upper and lower support bar 23, two pillars 22
Bar 23 is welded by two round steel pipes 2 20, two blocks of steel plates 2 18 and a smooth round steel 19.Described torsion cylinder 2
Two cylinders not waited including two concentric radius are inner cylinder 11 and outer barrel 12, and floor of putting more energy into is passed through between inner cylinder 11 and outer barrel 12
14 welding, the upper and lower cylinder face of described outer barrel 12 is welded by the round steel pipe 1 of fixed steel wire rope 5, described outer barrel 12
Forward and backward nozzle is equipped with annulus 13；The fixture of fixation test beam 24 is provided with described inner cylinder 11, the fixation test beam 24
Fixture is made up of six roots of sensation high-strength bolt bar 16 and plate 17；Described steel wire rope 5 bypasses outer barrel 12 and tangentially extended, with
The slab base 21 of hollow plunger synchronous hydra-ulic jacks 3 is placed in the slab formation of one fixed lateral attitude of steel wire rope 5, described
Hollow plunger synchronous hydra-ulic jacks 3 be placed between reaction beam 8 and slab base 21, described slab base 21 is provided with
The corresponding breach of fixed steel wire rope 5, breach can fix steel wire rope 5.
During specific experiment, torsion cylinder 2 is clamped to the outer rim of test beam 24 by fixture, the two ends of test beam 24 are by folder branch
Seat 4 is fixed on pedestal 6, and hollow plunger synchronous hydra-ulic jacks 3 are placed between reaction beam 8 and slab base 21, are fixed
Steel wire rope 5.When test beam 24 twists deformation, because steel wire rope 5 is tangent with torsion cylinder 2 all the time, therefore examination can guarantee that
Test before and after test beam 24 and be subjected only to moment of torsion effect.The lifting of hollow plunger synchronous hydra-ulic jacks 3 applies pulling force, steel to steel wire rope 5
Outer barrel 12 of the direction of pull of cord 5 all the time with torsion cylinder 2 is tangent, and reversing cylinder 2 will rotate around itself center of circle, so as to drive examination
Test beam 24 also to twist deformation, press from both sides each in the middle of branch, the limitation of 4 pairs of end frees degree of test beam 24, test beam 24 by two ends
Displacement of the section along longitudinal direction will be received constraint by the buckling deformation of different degrees of effect of contraction, section will produce lonitudinal warping
Direct stress.
Fig. 6 is the preliminary identification of this experimental rig reliability.Research shows, by pressing from both sides bearing 4 to the two ends of test beam 24
Rotational freedom is limited, and displacement of each section along longitudinal direction has been actually subjected to different degrees of constraint, test beam in the middle of test beam 24
24 happens is that constrained twisting deformability.
The embodiment to the present invention is described above, but the present invention is not limited to above description.For this
For the technical staff in field, any equal modifications and substitutions to the technical program are all within the scope of the invention.Cause
This, the impartial conversion and modification made without departing from the spirit and scope of the invention all should be contained within the scope of the invention.
Claims (5)
1. a kind of girder steel constraint torsion experimental rig, it is characterised in that：Including loading frame, reverse the synchronous liquid of cylinder, hollow plunger
Jack, folder bearing and steel wire rope are pressed, the two ends of described loading frame are respectively equipped with folder bearing, and folder bearing is fixed on pedestal,
Described loading frame is provided with hollow plunger synchronous hydra-ulic jacks, loading frame provided with cylinder is reversed, and is reversed and is provided with cylinder
The fixture of fixation test beam, wherein test beam it are fixed through torsion cylinder and by the fixture of test beam, test beam
Two ends have folder bearing to be fixed.
2. a kind of girder steel constraint torsion experimental rig according to claim 1, it is characterised in that：Described loading frame includes
Upper and lower reaction beam is provided between two columns and upper and lower reaction beam, two described columns, described torsion cylinder is fixed on upper and lower
Position between reaction beam, wherein described column is made up of steel pipe, described reaction beam is welded confession by two blocks of steel plates one
Hollow plunger synchronous hydra-ulic jacks are further applied load.
3. a kind of girder steel constraint torsion experimental rig according to claim 1, it is characterised in that：Described folder bearing includes
Upper and lower support bar is provided between two pillars and upper and lower support bar, two pillars, the upper and lower support bar told is by two round steel pipes
2nd, two blocks of steel plates two and a smooth round steel are welded.
4. a kind of girder steel constraint torsion experimental rig according to claim 1, it is characterised in that：Described torsion cylinder bag
The two cylinders i.e. inner cylinder and outer barrel that two concentric radius are not waited is included, it is described by ribbed stiffener plate weld between inner cylinder and outer barrel
The upper and lower cylinder face of outer barrel weld by the round steel pipe one of fixed steel wire rope, the forward and backward nozzle of described outer barrel is equipped with circle
Ring；Be provided with the fixture of fixation test beam in described inner cylinder, the fixture of the fixation test beam by six roots of sensation high-strength bolt bar with
Plate is constituted.
5. a kind of girder steel constraint torsion experimental rig according to claim 4, it is characterised in that：Described steel wire rope is bypassed
Outer barrel tangentially extends, and it is very heavy that hollow plunger synchronous hydraulic is placed in the slab formation with a fixed steel wire rope lateral attitude
The slab base on top, described hollow plunger synchronous hydra-ulic jacks are placed between reaction beam and slab base, described thickness
Plate base is provided with the corresponding breach of fixed steel wire rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710437050.XA CN107179251B (en) | 2017-06-12 | 2017-06-12 | A kind of girder steel constraint torsion experimental rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710437050.XA CN107179251B (en) | 2017-06-12 | 2017-06-12 | A kind of girder steel constraint torsion experimental rig |
Publications (2)
| Publication Number | Publication Date |
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| CN107179251A true CN107179251A (en) | 2017-09-19 |
| CN107179251B CN107179251B (en) | 2019-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710437050.XA Active CN107179251B (en) | 2017-06-12 | 2017-06-12 | A kind of girder steel constraint torsion experimental rig |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108411951A (en) * | 2018-02-06 | 2018-08-17 | 太原理工大学 | A kind of stake top compliant rotational constrained test device and method |
| CN108593151A (en) * | 2018-07-10 | 2018-09-28 | 浙江永阳节能技术有限公司 | A kind of calorimeter crushing tester |
| CN108709817A (en) * | 2018-07-11 | 2018-10-26 | 中国航发沈阳发动机研究所 | A kind of flexible axle twisting property experimental rig |
| CN109357649A (en) * | 2018-11-16 | 2019-02-19 | 浙江全华实业有限公司 | A kind of test platform for bridge expansion joint installation |
| CN109794566A (en) * | 2019-03-28 | 2019-05-24 | 射洪县才伦建材有限责任公司 | It is a kind of high to prolong cold rolled reinforcing steel bar with ribs workpiece producing device |
| CN110253471A (en) * | 2019-07-16 | 2019-09-20 | 宝业集团浙江建设产业研究院有限公司 | A kind of flexible jig for structural mechanics test |
| CN110426281A (en) * | 2019-07-29 | 2019-11-08 | 泸州临港工业化建筑科技有限公司 | A kind of construction steel structure intensity detecting device convenient for recycling |
| CN111811762A (en) * | 2020-07-10 | 2020-10-23 | 中国航发沈阳发动机研究所 | Blade fatigue test fixture |
| CN112051050A (en) * | 2020-09-23 | 2020-12-08 | 中国建筑第八工程局有限公司 | Detection device and detection method for steel strand inhaul cable |
| CN112213209A (en) * | 2020-10-12 | 2021-01-12 | 南通理工学院 | Torsion resistance test device for reinforced concrete member |
| CN112525726A (en) * | 2020-11-23 | 2021-03-19 | 东南大学 | Torsion test stand |
| CN114184495A (en) * | 2021-12-09 | 2022-03-15 | 中国船舶科学研究中心 | Ship equivalent beam sensitivity coefficient calibration fixing device and measuring method |
| CN114689297A (en) * | 2022-03-22 | 2022-07-01 | 大连理工大学 | Test bed for detecting torque transmission performance of thin-wall interference connector |
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| CN106053257A (en) * | 2016-06-03 | 2016-10-26 | 河海大学 | Torsion test device and method for measuring bending torque of concrete column |
| CN106441753A (en) * | 2016-11-16 | 2017-02-22 | 东南大学 | Long-beam component pure torsion test loading device and testing method thereof |
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| US6575042B1 (en) * | 2002-02-13 | 2003-06-10 | Beere Precision Medical Instruments, Inc. | Beam-type torsion applying and measuring tool |
| SK852012U1 (en) * | 2012-06-18 | 2012-10-02 | Slovenska Technicka Univerzita V Bratislave | Universal device for measuring the effects of torsion beams |
| CN103558099A (en) * | 2013-10-22 | 2014-02-05 | 沈阳建筑大学 | Bending torsion test loading device for steel tube concrete pile |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108411951A (en) * | 2018-02-06 | 2018-08-17 | 太原理工大学 | A kind of stake top compliant rotational constrained test device and method |
| CN108593151A (en) * | 2018-07-10 | 2018-09-28 | 浙江永阳节能技术有限公司 | A kind of calorimeter crushing tester |
| CN108709817B (en) * | 2018-07-11 | 2021-05-25 | 中国航发沈阳发动机研究所 | Flexible shaft torsion performance test device |
| CN108709817A (en) * | 2018-07-11 | 2018-10-26 | 中国航发沈阳发动机研究所 | A kind of flexible axle twisting property experimental rig |
| CN109357649A (en) * | 2018-11-16 | 2019-02-19 | 浙江全华实业有限公司 | A kind of test platform for bridge expansion joint installation |
| CN109357649B (en) * | 2018-11-16 | 2024-03-01 | 宁波路宝交通设施有限公司 | Test platform for bridge expansion joint device |
| CN109794566A (en) * | 2019-03-28 | 2019-05-24 | 射洪县才伦建材有限责任公司 | It is a kind of high to prolong cold rolled reinforcing steel bar with ribs workpiece producing device |
| CN110253471A (en) * | 2019-07-16 | 2019-09-20 | 宝业集团浙江建设产业研究院有限公司 | A kind of flexible jig for structural mechanics test |
| CN110253471B (en) * | 2019-07-16 | 2024-02-02 | 宝业集团浙江建设产业研究院有限公司 | Adjustable clamp for structural mechanics test |
| CN110426281B (en) * | 2019-07-29 | 2021-12-24 | 泸州临港工业化建筑科技有限公司 | Building steel structure strength detection device |
| CN110426281A (en) * | 2019-07-29 | 2019-11-08 | 泸州临港工业化建筑科技有限公司 | A kind of construction steel structure intensity detecting device convenient for recycling |
| CN111811762A (en) * | 2020-07-10 | 2020-10-23 | 中国航发沈阳发动机研究所 | Blade fatigue test fixture |
| CN112051050A (en) * | 2020-09-23 | 2020-12-08 | 中国建筑第八工程局有限公司 | Detection device and detection method for steel strand inhaul cable |
| CN112213209A (en) * | 2020-10-12 | 2021-01-12 | 南通理工学院 | Torsion resistance test device for reinforced concrete member |
| CN112525726A (en) * | 2020-11-23 | 2021-03-19 | 东南大学 | Torsion test stand |
| CN112525726B (en) * | 2020-11-23 | 2022-03-11 | 东南大学 | Torsion test stand |
| CN114184495A (en) * | 2021-12-09 | 2022-03-15 | 中国船舶科学研究中心 | Ship equivalent beam sensitivity coefficient calibration fixing device and measuring method |
| CN114184495B (en) * | 2021-12-09 | 2024-01-26 | 中国船舶科学研究中心 | Ship equivalent Liang Lingmin degree coefficient calibration fixing device and determination method |
| CN114689297A (en) * | 2022-03-22 | 2022-07-01 | 大连理工大学 | Test bed for detecting torque transmission performance of thin-wall interference connector |
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