CN106769536A - The pure torsion test loading device of beam and its test method - Google Patents
The pure torsion test loading device of beam and its test method Download PDFInfo
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- CN106769536A CN106769536A CN201611033030.8A CN201611033030A CN106769536A CN 106769536 A CN106769536 A CN 106769536A CN 201611033030 A CN201611033030 A CN 201611033030A CN 106769536 A CN106769536 A CN 106769536A
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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
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
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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
- G01N2203/0021—Torsional
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0264—Beam
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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
- G01N2203/02—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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- 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
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of pure torsion test loading device of beam, including the torsion entablature and torsion sill that are opposite to test beam one end upper and lower surface and the clamping entablature and clamping sill that are opposite to test beam other end upper and lower surface, one end of torsion sill is equipped with the reaction frame for providing reaction force, is provided with reaction frame for the jack with force cell for torsion sill imposed load；Torsion entablature/be provided with rolling support between torsion sill and test beam upper and lower surface；Reverse to be rotatably connected below sill and have the reflexive support pier of unsymmetric structure, and the center of rotation coincides with the centre of twist of test beam；Sill is fixedly connected below clamp standoff pier for clamping.The boundary condition of test beam of the present invention sets reasonable, is the centre of twist of test beam by the center of rotation for ensuring to reverse sill, and uses the longitudinal restraint of rolling support release test beam to realize the torsion of test beam for around the pure torsion of the section centre of twist.
Description
Technical field
Add the present invention relates to Structural Engineering experimental rig and its test method, more particularly to a kind of pure torsion test of beam
Carry and put and its test method.
Background technology
In Structural Engineering, bridge, beams of concrete etc. can all be reduced to beam, in the complicated applied force such as wind load and earthquake
Under effect, in addition to by axial force and moment of flexure, the also effect of moment of torsion.Therefore, it is necessary to beam under moment of torsion effect
Structural behaviour, failure mechanism furtherd investigate.At present in the pure torsion test of beam, when using electro-hydraulic servo start
When device is as loading equipemtn, cost is high.When no electro-hydraulic servo actuator is used as loading equipemtn, typically using Normal hydraulic
Jack is used as loading equipemtn.And in this case, loading device compared be difficult to obtain test beam ultimate bearing capacity, mainly
Because the increase of the torsion angle at end is reversed with test beam, jack meeting run-off the straight, when angle of inclination reaches to a certain degree
When, jack will drop.If be not provided with special device, the boundary condition of test beam sets unreasonable, test beam
Torsion is not about the pure torsion of the beam section centre of twist.
It would therefore be highly desirable to solve the above problems.
The content of the invention
Goal of the invention：Jack not run-off the straight and examination in loading procedure can be ensured it is an object of the invention to provide one kind
The torsion for testing beam is the pure torsion test loading device of beam of the pure torsion around the section centre of twist.
The second object of the present invention is to provide the test method of the loading device.
Technical scheme：To realize object above, the pure torsion test loading device of beam of the present invention, including it is opposite to experiment
The torsion entablature of beam one end upper and lower surface and reverse sill and be opposite in the clamping of test beam other end upper and lower surface
Crossbeam and clamping sill, one end of the torsion sill is equipped with the reaction frame for providing reaction force, the reaction frame
Inside it is provided with for the jack with force cell for torsion sill imposed load；The lower horizontal stroke of torsion entablature/torsion
The rolling support for release test beam longitudinal restraint is provided between beam and test beam upper and lower surface；Under the torsion sill
The reflexive support pier of unsymmetric structure can be rotatably connected to, and the center of rotation coincides with the centre of twist of test beam；Institute
State clamping sill lower section and be fixedly connected with clamp standoff pier.The boundary condition of test beam of the present invention sets reasonable, by ensuring
Reverse sill center of rotation for test beam the centre of twist, and using rolling support release test beam longitudinal restraint come
The torsion for realizing test beam is the pure torsion around the section centre of twist.
Wherein, the outer gusset of the jack is provided with the jack anti-deflection device in reaction frame, the anti-bias dress of the jack
Put including set gradually from top to bottom the fixed plate being fixedly connected with jack top, for limit jack movement it is spacing
Frame, the anti-bias case of non-cover type for carrying very heavy top/bottom part, unidirectional hinged-support and it is placed in the cylindrical roller of the upper surface for reversing sill；
It is additionally provided with one opposite flank of the anti-bias case perpendicular to a pair of lateral support steel plates for reversing sill.The present invention is by anti-
Power frame provides reaction force for device, while jack anti-deflection device is set in reaction frame, by the jack anti-deflection device
Jack not run-off the straight during the torsion angle that end is reversed with test beam gradually increases is ensured, jack will not occur
Drop.
Preferably, the surface that the anti-bias case and lateral support steel plate are in contact is sprayed with lubricant.
Further, the reaction frame includes symmetrically arranged reaction frame column and the reaction frame for connecting reaction frame column
Crossbeam, reaction frame base, the space that the reaction frame crossbeam, reaction frame column and torsion sill are surrounded are built-in with jack and thousand
Jin top anti-deflection device；Wherein, the reaction frame crossbeam is connected with fixed plate, the inner side of the reaction frame column and position-limited rack and
Lateral support steel plate is connected, and the outside of the reaction frame column is connected with reaction frame diagonal brace.Reaction frame of the invention is by steel
Plate weld is formed, sound construction, and is symmetrically set in reaction frame diagonal brace on the outside both sides of reaction frame and is further enhanced reaction frame
Enabling capabilities.
Furthermore, the asymmetric inverted T-type structure that the reflexive support pier is welded by steel plate, the reflexive support pier it is vertical
Post upper end is rotatably connected by rotating stand with sill is reversed, and center of rotation and the test beam of the rotating stand torsion
Center coincides, and the crossbeam of the reflexive support pier is fixedly connected with the ground；Wherein described rotating stand is included with the upper of arc convex
Half bearing and with the lower half bearing with arc groove that it fastens, be provided with the groove of the lower half bearing and groove radian phase one
The arc retainer of cause, several rollers are placed with the arc retainer.The present invention uses the reflexive support of unsymmetric structure
Pier, the size of the loading arm of force can be freely changed by the position for adjusting reflexive support pier, and the test beam that can carry out multigroup parameter is pure
Torsion test；The present invention realizes reversing being rotatably connected for sill and reflexive support pier by rotating stand simultaneously, while leading to
Cross the upper half bearing with arc convex being mutually clamped and realize its center of rotation and test beam with the lower half bearing with arc groove
The centre of twist coincide.
Preferably, the torsion entablature and reverse sill and be welded by steel plate, the torsion entablature and torsion
Sill is provided with the bolt hole that L groups are corresponded and matched with test beam size up and down, and wears stud and connected
Connect；The lower surface for reversing sill is provided with the M group bolts hole matched with rotating stand；L and M are whole not less than 2
Number.
Further, the clamping entablature and clamping sill are welded by steel plate, the clamping entablature and clamping
Sill is provided with the bolt hole that N groups are corresponded and matched with test beam size up and down, and wears stud with clamping
Support pier is connected, and wherein N is the integer not less than 2.Fabricated construction of the invention, the part for being capable of achieving each part is quickly replaced
Change, and multigroup bolt hole is provided with the torsion lower and upper cross-member and clamping lower and upper cross-member of the device, be conducive to for different size
Test beam launch experimental study, highly versatile.
Furthermore, the rolling support includes several segmentations being made up of steel plate with groove and the pole being placed in groove
Formula supporting construction, the total length of the rolling support is consistent with the width of test beam.
Preferably, the clamp standoff pier is welded by steel plate, and the two ends of the clamp standoff pier pass through earth anchor and ground
It is affixed.
A kind of test method that the pure torsion test of beam is carried out using above-mentioned loading device, is comprised the following steps：
(1), get test beam ready, reverse entablature, reverse sill, clamping entablature, clamping sill, reaction frame, anti-
Power frame diagonal brace, jack, rolling support, reflexive support pier, clamp standoff pier, jack anti-deflection device, position-limited rack, anti-bias case,
Unidirectional hinged-support and rotating stand；
(2), by the bottom of reaction frame, reaction frame diagonal brace, reflexive support pier and clamp standoff pier and bottom surface Joint, counter-force
Frame diagonal brace is connected with reaction frame；
(3) sill, rotating stand, will be reversed to be connected with reflexive support pier successively, sill to level is reversed in regulation；
(4), clamping sill is connected with clamp standoff pier, and adjusts clamping sill to level；
(5), test beam is installed, and rolling support is placed between torsion entablature and torsion sill at it, will reverse
Entablature is connected with sill is reversed, and clamping entablature, clamping sill are connected with clamp standoff pier；
(6), the jack with force cell is connected with jack anti-deflection device, is placed in reaction frame；
(7), jack pair reverses sill applying load vertically downward, until test beam is destroyed；
(8), the data detected according to force cell calculate the moment of torsion that test beam is born；
(9), the torsion angle according to produced by the data calculating test beam that inclinator is detected.
Beneficial effect：Compared with prior art, the present invention has following remarkable advantage：
(1) boundary condition of test beam of the present invention sets reasonable, by ensuring that the center of rotation for reversing sill is experiment
The centre of twist of beam, and use the longitudinal restraint of rolling support release test beam to realize the torsion of test beam to be turned round around section
Turn the pure torsion at center；
(2) present invention passes through reaction frame for device provides reaction force, while setting the anti-bias dress of jack in reaction frame
Put, ensure jack during the torsion angle that end is reversed with test beam gradually increases not by the jack anti-deflection device
Run-off the straight, jack will not drop；
(3) present invention can freely be changed using the reflexive support pier of unsymmetric structure by the position for adjusting reflexive support pier
Become the size of the loading arm of force, the pure torsion test of test beam of multigroup parameter can be carried out；
(4) present invention realizes being rotatably connected for torsion sill and reflexive support pier by rotating stand, while passing through
The upper half bearing with arc convex being mutually clamped realizes its center of rotation with test beam with the lower half bearing with arc groove
The centre of twist coincides；
(5) fabricated construction of the invention, is capable of achieving the local quick replacement of each part, and the torsion of the device is horizontal up and down
Multigroup bolt hole is provided with beam and clamping lower and upper cross-member, is conducive to launching experimental study for various sizes of test beam, led to
It is strong with property, can be used for the pure torsion test of all kinds of rectangle beams, have a extensive future.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation of reaction frame in the present invention；
Fig. 3 is the explosive view of jack anti-deflection device in the present invention；
Fig. 4 is the explosive view of rotating stand in the present invention；
Fig. 5 is the structural representation of rolling support in the present invention；
Fig. 6 (a)~6 (d) is the structural representation of common test beam；
Fig. 7 is the torque arithmetic schematic diagram that loading device of the present invention applies.
Specific embodiment
Technical scheme is described further below in conjunction with the accompanying drawings.
As shown in figure 1, the pure torsion test loading device of a kind of beam of the invention, including reverse entablature 2, reverse lower horizontal stroke
Beam 3, clamping entablature 4, clamping sill 5, reaction frame 6, jack 7, rolling support 8, reflexive support pier 9, clamp standoff pier
10th, jack anti-deflection device 11 and rotating stand 12.As shown in figure 3, jack anti-deflection device 11 includes fixed plate 111, spacing
It is frame 112, anti-bias case 113, unidirectional hinged-support 114, cylindrical roller 115 and lateral support steel plate 116, wherein fixed plate 111, spacing
Frame 112, anti-bias case 113, unidirectional hinged-support 114 and cylindrical roller 115 set gradually from top to bottom.As shown in Fig. 2 reaction frame 6
It is welded by steel plate, including reaction frame column 601, reaction frame crossbeam 602, reaction frame base 603 and reaction frame diagonal brace 604.
As shown in figure 3, jack of the invention uses hydraulic pressure separating formula jack, it is controlled by oil pump, its model
The Maximal loading for applying can be needed to select according to experiment, the jack is stood upside down by bolt and is fixed in fixed plate 111.Its
In, the outer gusset of jack 7 is provided with the jack anti-deflection device 11 in reaction frame 6, and corresponding positioning is opened up in fixed plate 111
Hole, is mutually fixed by bolt with the screwed hole of very heavy top/bottom part；Screwed hole is additionally provided with fixed plate, and by bolt and reaction frame
The bottom Joint of crossbeam 602.Position-limited rack 112 is a pair of T-steel plates that relative top is stuck in jack outer wall, the T-steel plate it is vertical
There is the arc notch consistent with jack outer wall radian, the base plate of the T-steel plate is provided with bolt hole on plate, and by bolt
It is connected with the reaction frame column 601 of reaction frame 6.The non-cover type body structure that anti-bias case 113 is welded by steel plate, jack
7 times placement force cells 701, the force cell 701 is together placed in anti-bias case 113 with jack 7, the anti-bias case
113 bottom is bolted with the top of unidirectional hinged-support 114.It is additionally provided with an opposite flank of anti-bias case 113 simultaneously vertical
Straight a pair of lateral support steel plates 116 in torsion sill, and the surface that anti-bias case 113 and lateral support steel plate 116 are in contact
It is sprayed with room temperature curing type molybdenum bisuphide lubrication dry film.On the medial surface of the lateral support steel plate 116 insertion reaction frame column 601
In conduit 605, the displacement lateral to limit anti-bias case 113.Unidirectional hinged-support 114 is hinged and relatively turnable for a pair
Half hinged-support, cylindrical roller 115 is set between the unidirectional hinged-support and torsion sill.The present invention is by cylindrical roller 115
Roll, the rotation of unidirectional hinged-support 114 and lateral support steel plate are ensured to the limitation of anti-bias case lateral displacement and loaded
Jack 7 and the not run-off the straight of force cell 701 and dropped in journey.
As shown in Fig. 2 reaction frame column 601 is symmetrical arranged, and connected by reaction frame crossbeam 602, reaction frame base 603
The upper and lower ends of reaction frame column 601.In the space that reaction frame crossbeam 602, reaction frame column 601 and torsion sill 3 are surrounded
It is equipped with jack 7 and jack anti-deflection device 11；The above-mentioned bottom surface of reaction frame crossbeam 602, the medial surface of reaction frame column 601, counter-force
Erect and offer bolt hole respectively on the lateral surface of post 601.Wherein, the underrun bolt of reaction frame crossbeam 602 and the phase of fixed plate 111
Connection, the medial surface of reaction frame column 601 is by bolt and the Joint of position-limited rack 112, the lateral surface of reaction frame column 601 and reaction frame
The Joint of diagonal brace 604.Wherein, the inner side of reaction frame column 601 is additionally provided with conduit 605, and the conduit 605 is for setting lateral branch
Support steel plate 116.The present invention passes through reaction frame for device provides reaction force, while setting the anti-bias dress of jack in reaction frame
Put, ensure jack during the torsion angle that end is reversed with test beam gradually increases not by the jack anti-deflection device
Run-off the straight, jack will not drop.
Loading device of the present invention includes being opposite to the torsion entablature 2 of one end upper and lower surface of test beam 1 and reverses sill
3 and the clamping entablature 4 and clamping sill 5 of test beam 1 other end upper and lower surface are opposite to, it is described to reverse sill 3
One end is equipped with the reaction frame 6 for providing reaction force, is provided with the reaction frame 6 for reverse the imposed load of sill 3
The jack 7 with force cell 701；The torsion entablature 2/ is reversed and set between sill 3 and the upper and lower surface of test beam 1
There is the rolling support 8 for release test beam longitudinal restraint；The lower section for reversing sill 3 is rotatably connected and has unsymmetrical knot
The reflexive support pier 9 of structure, and the center of rotation coincides with the centre of twist of test beam 1；The lower section of clamping sill 5 is fixed
It is connected with clamp standoff pier 10.
The asymmetric inverted T-type structure that reflexive support pier 9 of the invention is welded by steel plate, the reflexive support pier 9
Column upper end by rotating stand 12 with reverse sill 3 be rotatably connected, and the rotating stand 12 center of rotation with test
The centre of twist of beam 1 is coincided, and the crossbeam of reflexive support pier 9 is fixedly connected with the ground by ground anchor bolt.Clamp standoff pier 10 is by steel
Plate weld is formed, and the two ends of the clamp standoff pier 10 are fixedly connected with the ground by earth anchor.The present invention uses the torsion of unsymmetric structure
Support pier, the size of the loading arm of force can be freely changed by the position for adjusting reflexive support pier, can carry out the experiment of multigroup parameter
The pure torsion test of beam.
As shown in figure 4, rotating stand 12 includes the upper half bearing 121 with arc convex and recessed with the band arc that it fastens
The lower half bearing 122 of groove, is provided with the arc retainer 123 consistent with groove radian, the arc in the groove of the lower half bearing 122
Several rollers 124 are placed with shape retainer 123.Upper half bearing 121 with arc convex is by the thick steel through milling camber
Plate is formed with square steel plate Combination Welding, and the lower half bearing 122 with arc groove is by through being milled into the bloom with arc groove and side
Steel plate is welded.The arc radius of rotating stand 12 can be configured according to the size of test beam, make its center of rotation be examination
The centre of twist for testing beam 1 is consistent.The present invention realizes that reverse sill connects with the rotatable of reflexive support pier by rotating stand
Connect, while realizing its center of rotation by the upper half bearing with arc convex and the lower half bearing with arc groove that are mutually clamped
The centre of twist with test beam coincides.
Entablature 2 and the torsion sill 3 of reversing of the invention is welded by steel plate, under the torsion entablature 2 and torsion
Crossbeam 3 is provided with the bolt hole that L groups are corresponded and matched with test beam size up and down, and wears stud and connected
Connect；The lower surface for reversing sill 3 is provided with the M group bolts hole matched with rotating stand 12；L and M are whole not less than 2
Number.Clamping entablature 4 and clamping sill 5 are welded by steel plate, and the clamping entablature 4 and clamping sill 5 are provided with N
The bolt hole for corresponding up and down and matching with test beam size is organized, and wears stud and be connected with clamp standoff pier 10
Connect, wherein N is the integer not less than 2.Above-mentioned fabricated construction, the local quick replacement of achievable each part, and the device
Reverse and be provided with multigroup bolt hole on lower and upper cross-member and clamping lower and upper cross-member, be conducive to launching examination for various sizes of test beam
Test research, highly versatile.
As shown in figure 5, above-mentioned rolling support 8 includes several by steel plate with groove 801 and the pole being placed in groove
The segmented supporting construction of 802 compositions, the total length of the rolling support 8 is consistent with the width of test beam 1.Reverse entablature with
Rolling support 8 is placed respectively and torsion sill and the lower surface of test beam between the upper surface of test beam.
A kind of test method that the pure torsion test of beam is carried out using loading device, is comprised the following steps：
(1), get test beam 1 ready, reverse entablature 2, reverse sill 3, clamping entablature 4, clamping sill 5, counter-force
Frame 6, reaction frame diagonal brace 604, jack 7, rolling support 8, reflexive support pier 9, clamp standoff pier 10, jack anti-deflection device
11st, position-limited rack 112, anti-bias case 113, unidirectional hinged-support 114 and rotating stand 12；
(2), the bottom and ground of reaction frame 6, reaction frame diagonal brace 604, reflexive support pier 9 and clamp standoff pier 10 are passed through
Ground anchor bolt Joint, reaction frame diagonal brace 604 is connected with reaction frame 6 by bolt；
(3) sill 3, rotating stand 12, will be reversed to be connected by bolt with reflexive support pier 9 successively, can be with temporarily
Sill 3 to level is reversed in support regulation；
(4), clamping sill 5 is connected with clamp standoff pier 10 by bolt, and adjusts clamping sill 5 to water
It is flat；
(5), test beam 1 is installed, and rolling support 8 is placed between torsion entablature 2 and torsion sill 3 at it, will
Reverse entablature 2 and be connected with sill 3 is reversed, clamping entablature 4, clamping sill 5 and clamp standoff pier 10 are passed through into spiral shell
Bolt is connected；
(6) fixed plate 111 in the jack 7 with force cell 701 and jack anti-deflection device 11, is passed through into bolt
It is connected, fixed plate is fixed by bolts to the bottom of reaction frame crossbeam 602, position-limited rack 112 is fixed by bolts to reaction frame
On column 601；Unidirectional hinged-support 114 is connected with anti-bias case 113 with bolt, and is arranged on the underface of jack 7, very heavy
Force cell 701 is placed between top 7 and anti-bias case 113, places some in unidirectional hinged-support 114 and between reversing sill 3
Individual cylindrical roller 115；
(7) load that sills 3 apply vertically downward, is reversed using 7 pairs, hydraulic pressure separating formula jack, loading procedure is used
By the graded loading way of power controlled loading, until test beam 1 is destroyed；
(8), the data detected according to force cell 701 calculate the moment of torsion that test beam 1 is born；
(9), the torsion angle according to produced by the data calculating test beam 1 that inclinator 13 is detected.
After completing a kind of pure torsion test of test beam 1 of parameter, (the replaceable rotating stand if necessary of replaceable test beam 1
12, so that the center of rotation of rotating stand 12 matches with the centre of twist of the cross section of test beam 1) and retain remaining device, enter
The next kind of pure torsion test of the test beam of parameter 1 of row.
As shown in fig. 7, the vertical force that jack 7 applies is F, can be measured by force cell 701, reverse sill 3 real
The load that border is subject to is that, perpendicular to the power F ' for reversing sill 3, the torsion angle that it is produced is θ, can be measured by inclinator 13.Fig. 7
Middle ∠ CBD=∠ CAD=θ, BC=l, AD=h, AC=h ', power F ' can be analyzed to the vertical force of jack applying for F and lateral
The horizontal force H that supporting steel plate 116 is provided.Therefore torque T=Fl+Hh '=Fl+Ftan θ (ltan θ+h/cos that test beam 1 is subject to
θ), as θ and h smaller, T=Fl can be approximately considered；Under torque T effect, the torsion angle that test beam 1 is produced is θ.
The boundary condition of test beam of the present invention sets reasonable, by ensuring that the center of rotation for reversing sill is test beam
The centre of twist, and the longitudinal restraint of rolling support release test beam is used come in realizing the torsion of test beam to be reversed around section
The pure torsion of the heart.
Claims (10)
1. the pure torsion test loading device of a kind of beam, it is characterised in that：Including being opposite to test beam (1) one end upper and lower surface
Torsion entablature (2) and reverse sill (3) and be opposite to the clamping entablature of test beam (1) other end upper and lower surface
(4) and clamping sill (5), described one end for reversing sill (3) is equipped with reaction frame (6) for providing reaction force,
The jack (7) for the band force cell (701) for torsion sill (3) imposed load is provided with the reaction frame (6)；Institute
State torsion entablature (2)/reverse sill (3) and test beam (1) upper and lower surface between be provided with for release test beam longitudinally about
The rolling support (8) of beam；Being rotatably connected below torsion sill (3) has the reflexive support pier (9) of unsymmetric structure,
And the center of rotation coincides with the centre of twist of test beam (1)；Clamping sill (5) lower section is fixedly connected with clamping branch
Support pier (10).
2. the pure torsion test loading device of beam according to claim 1, it is characterised in that：The jack (7) is outward
Gusset is provided with the jack anti-deflection device (11) in reaction frame (6), and the jack anti-deflection device (11) is including from top to bottom
The fixed plate (111) being fixedly connected with jack top that sets gradually, the position-limited rack (112) for limiting jack movement,
Carry the anti-bias case of the non-cover type (113) of very heavy top/bottom part, unidirectional hinged-support (114) and be placed in the circle of the upper surface for reversing sill
Post roller (115)；It is additionally provided with one opposite flank of the anti-bias case (113) perpendicular to a pair of lateral supports for reversing sill
Steel plate (116).
3. the pure torsion test loading device of beam according to claim 2, it is characterised in that：The anti-bias case (113)
The surface being in contact with lateral support steel plate (116) is sprayed with lubricant.
4. the pure torsion test loading device of beam according to claim 2, it is characterised in that：Reaction frame (6) bag
Include symmetrically arranged reaction frame column (601) and reaction frame crossbeam (602), reaction frame base for connecting reaction frame column
(603) space that, the reaction frame crossbeam (602), reaction frame column (601) and torsion sill (3) are surrounded is built-in with jack
And jack anti-deflection device (11) (7)；Wherein, the reaction frame crossbeam (602) is connected with fixed plate (111), the counter-force
The inner side for erecting post (601) is connected with position-limited rack (112) and lateral support steel plate (116), outside the reaction frame column (601)
Side is connected with reaction frame diagonal brace (604).
5. the pure torsion test loading device of beam according to claim 1, it is characterised in that：The reflexive support pier
(9) the asymmetric inverted T-type structure being welded by steel plate, the column upper end of the reflexive support pier (9) passes through rotating stand
(12) with reverse sill (3) and be rotatably connected, and center of rotation and the test beam (1) of the rotating stand (12) the centre of twist
Coincide, the crossbeam of the reflexive support pier (9) is fixedly connected with the ground；Wherein described rotating stand (12) is including with arc convex
Upper half bearing (121) and the lower half bearing (122) with arc groove fastened with it, in the groove of the lower half bearing (122)
The arc retainer (123) consistent with groove radian is provided with, several rollers are placed with the arc retainer (123)
(124)。
6. the pure torsion test loading device of beam according to claim 5, it is characterised in that：The torsion entablature
(2) it is welded by steel plate with torsion sill (3), the torsion entablature (2) and torsion sill (3) are provided with L groups
Lower one-to-one corresponding and the bolt hole that matches with test beam size, and wear stud and be attached；The torsion sill
(3) lower surface is provided with the M group bolts hole matched with rotating stand (12)；L and M are the integer not less than 2.
7. the pure torsion test loading device of beam according to claim 1, it is characterised in that：The clamping entablature
(4) it is welded by steel plate with clamping sill (5), the clamping entablature (4) and clamping sill (5) are provided with N groups
Lower one-to-one corresponding and the bolt hole that matches with test beam size, and wear stud and be connected with clamp standoff pier (10),
Wherein N is the integer not less than 2.
8. the pure torsion test loading device of beam according to claim 1, it is characterised in that：The rolling support (8)
Including the segmented supporting construction that several are made up of steel plate with groove (801) and the pole (802) being placed in groove, the rolling
The total length of dynamic support (8) is consistent with the width of test beam (1).
9. the pure torsion test loading device of beam according to claim 1, it is characterised in that：The clamp standoff pier
(10) it is welded by steel plate, the two ends of the clamp standoff pier (10) are fixedly connected with the ground by earth anchor.
10. a kind of test method that the pure torsion test of beam is carried out using any described loading device of claim 1~9,
It is characterized in that：Comprise the following steps：
(1), get test beam (1) ready, reverse entablature (2), reverse sill (3), clamping entablature (4), clamping sill
(5), reaction frame (6), reaction frame diagonal brace (604), jack (7), rolling support (8), reflexive support pier (9), clamp standoff pier
(10), jack anti-deflection device (11), position-limited rack (112), anti-bias case (113), unidirectional hinged-support (114) and rotating stand
(12)；
(2), by the bottom and bottom surface of reaction frame (6), reaction frame diagonal brace (604), reflexive support pier (9) and clamp standoff pier (10)
Joint, reaction frame diagonal brace (604) is connected with reaction frame (6)；
(3) sill (3), rotating stand (12), will be reversed to be connected with reflexive support pier (9) successively, sill is reversed in regulation
(3) to level；
(4), clamping sill (5) is connected with clamp standoff pier (10), and adjusts clamping sill (5) to level；
(5) test beam (1), is installed, and rolling support is placed between torsion entablature (2) and torsion sill (3) at it
(8) entablature (2), will be reversed to be connected with sill (3) is reversed, by clamping entablature (4), clamping sill (5) and clamping
Support pier (10) is connected；
(6), the jack (7) with force cell (701) is connected with jack anti-deflection device (11), reaction frame is placed in
(1) in；
(7), jack (7) applies load vertically downward to torsion sill (3), until test beam (1) is destroyed；
(8), the data detected according to force cell (701) calculate the moment of torsion that test beam (1) is born；
(9), the torsion angle according to produced by data calculating test beam (1) that inclinator (13) is detected.
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| CN110849565A (en) * | 2019-12-19 | 2020-02-28 | 中国人民解放军陆军工程大学 | Universal device for space truss structure torsion experiment and use method |
| CN111504817A (en) * | 2020-04-20 | 2020-08-07 | 哈尔滨工程大学 | Steel fracture strain testing device under explosive load and testing method thereof |
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| CN113252456A (en) * | 2021-04-12 | 2021-08-13 | 哈尔滨工业大学 | Variable-angle eccentric loading test device for truss structure |
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| CN113970454A (en) * | 2021-10-28 | 2022-01-25 | 同济大学 | Continuous rigid frame bridge foundation ectopic torsion load model device and test method |
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