CN106769536B - 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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- CN106769536B CN106769536B CN201611033030.8A CN201611033030A CN106769536B CN 106769536 B CN106769536 B CN 106769536B CN 201611033030 A CN201611033030 A CN 201611033030A CN 106769536 B CN106769536 B CN 106769536B
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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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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of pure torsion test loading devices of beam, including to the torsion upper beam and torsion lower beam for being placed in test beam one end upper and lower surface and to the clamping upper beam and clamping lower beam for being placed in test beam other end upper and lower surface, one end of torsion lower beam is equipped with for providing the reaction frame of reaction force, and the jack with load cell for applying load for torsion lower beam is equipped in reaction frame；Torsion upper beam/rolling support is equipped between torsion lower beam and test beam upper and lower surface；Being rotatably connected below torsion lower beam has the reflexive support pier of unsymmetric structure, and the centre of twist of the center of rotation and test beam coincides；Lower beam is fixedly connected below clamp standoff pier for clamping.Rationally, the center of rotation by ensuring to reverse lower beam is the centre of twist of test beam, 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 for the boundary condition setting of test beam of the present invention.
Description
Technical field
The present invention relates to Structural Engineering experimental rig and its test methods more particularly to a kind of pure torsion test of beam to add
It carries and sets and its test method.
Background technique
In Structural Engineering, bridge, beams of concrete etc. can all be reduced to beam, in the complicated applied forces such as wind load and earthquake
Under effect, other than by axial force and moment of flexure, there are also the effects of torque.Therefore, it is necessary to beam under torque effect
Structural behaviour, failure mechanism furtherd investigate.At present in the pure torsion test of beam, when using electro-hydraulic servo actuation
When device is as loading equipemtn, cost is high.When there is no electro-hydraulic servo actuator as loading equipemtn, Normal hydraulic is generally used
Jack is as loading equipemtn.And in this case, loading device is compared with being difficult to obtain the ultimate bearing capacity of test beam, mainly
It is the increase because of the torsion angle with test beam torsion end, jack meeting run-off the straight, when tilt angle reaches a certain level
When, jack will be fallen.If be not provided with special device, the boundary condition setting of test beam is 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.
Summary of the invention
Goal of the invention: the object of the present invention is to provide one kind can ensure jack not run-off the straight and examination during loading
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 solution: in order to achieve the above object, the pure torsion test loading device of beam of the present invention, including test being placed in
The torsion upper beam of beam one end upper and lower surface and torsion lower beam and to being placed in the clamping of test beam other end upper and lower surface
One end of crossbeam and clamping lower beam, the torsion lower beam is equipped with for providing the reaction frame of reaction force, the reaction frame
The interior jack with load cell being equipped with for applying load for torsion lower beam；It is horizontal under the torsion upper beam/torsion
The rolling support for release test beam longitudinal restraint is equipped between beam and test beam upper and lower surface；Under the torsion lower beam
It can be rotatably connected to the reflexive support pier of unsymmetric structure, and the centre of twist of the center of rotation and test beam coincides；Institute
It states and is fixedly connected with clamp standoff pier below clamping lower beam.The boundary condition setting of test beam of the present invention is reasonable, by ensuring
Reverse lower beam center of rotation be 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 side wall of the jack is equipped with the jack anti-deflection device being located in reaction frame, the anti-bias dress of the jack
Set the fixed plate being fixedly connected with jack top including setting gradually from top to bottom, the limit for limiting jack movement
Frame, the anti-bias case of non-cover type of the very heavy top/bottom part of carrying, unidirectional hinged-support and be placed in torsion lower beam upper surface cylindrical roller；
A pair of of lateral support steel plate perpendicular to torsion lower beam is additionally provided on one opposite flank of the anti-bias case.The present invention passes through anti-
Power frame provides reaction force for device, while jack anti-deflection device being arranged in reaction frame, passes through the jack anti-deflection device
Ensure jack not run-off the straight during the torsion angle with test beam torsion end is gradually increased, jack will not occur
It falls.
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 pedestal, the space that the reaction frame crossbeam, reaction frame column and torsion lower beam surround are built-in with jack and thousand
Jin top anti-deflection device；Wherein, the reaction frame crossbeam is connected with fixed plate, the inside 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 is welded, sound construction, and is symmetrically set in reaction frame diagonal brace on the outside both sides of reaction frame and further enhances 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 are stood
Column upper end is rotatably connected by rotating stand and torsion lower beam, and the torsion of the center of rotation of the rotating stand and test beam
Center coincides, and the crossbeam of the reflexive support pier is fixedly connected with the ground；Wherein the rotating stand includes with the upper of arc convex
Half support and the lower half support with arc groove to fasten with it, are equipped in the groove of the lower half support and groove radian phase one
The arc retainer of cause is placed with several rollers in the arc retainer.The present invention uses the reflexive support of unsymmetric structure
Pier, can freely change the size of the load arm of force by adjusting the position of reflexive support pier, and the test beam that can carry out multiple groups parameter is pure
Torsion test；The present invention realizes being rotatably connected for torsion lower beam and reflexive support pier by rotating stand simultaneously, logical simultaneously
It crosses the upper half support with arc convex being mutually clamped and the lower half support with arc groove realizes its center of rotation and test beam
The centre of twist coincide.
Preferably, the torsion upper beam and torsion lower beam are welded by steel plate, the torsion upper beam and torsion
Lower beam is equipped with the bolt hole that L group corresponds up and down and matches with test beam size, and wears stud and connected
It connects；The lower surface of the torsion lower beam is equipped with the M group bolt hole to match with rotating stand；L and M is whole not less than 2
Number.
Further, the clamping upper beam and clamping lower beam are welded by steel plate, the clamping upper beam and clamping
Lower beam is equipped with the bolt hole that N group corresponds up and down and matches with test beam size, and wears stud and clamping
Support pier is connected, and wherein N is the integer not less than 2.Fabricated construction of the invention is, it can be achieved that the part of each component is quickly replaced
It changes, and is provided with multiple groups bolt hole on the torsion lower and upper cross-member of the device and clamping lower and upper cross-member, be conducive to for different sizes
Test beam be unfolded experimental study, it is versatile.
Furthermore the rolling support includes several segmentations being made of steel plate with groove and the pole being placed in groove
Formula support construction, the total length of the rolling support and the width of test beam are consistent.
Preferably, the clamp standoff pier is welded by steel plate, and the both ends of the clamp standoff pier pass through earth anchor and ground
It is affixed.
A kind of test method being carried out the pure torsion test of beam using above-mentioned loading device, is included the following steps:
(1), test beam, torsion upper beam, torsion lower beam, clamping upper beam, clamping lower beam, reaction frame, anti-is got ready
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), torsion lower beam, rotating stand are successively connected with reflexive support pier, adjust torsion lower beam to level；
(4), clamping lower beam is connected with clamp standoff pier, and adjusts clamping lower beam to level；
(5), test beam is installed, and places rolling support between torsion upper beam and torsion lower beam at it, will be reversed
Upper beam is connected with torsion lower beam, and clamping upper beam, clamping lower beam are connected with clamp standoff pier；
(6), the jack with load cell is connected with jack anti-deflection device, is placed in reaction frame；
(7), jack pair torsion lower beam applies load vertically downward, until test beam destroys；
(8), the data detected according to load cell calculate the torque that test beam is born；
(9), torsion angle caused by test beam is calculated according to the data that inclinator detects.
The utility model has the advantages that compared with prior art, the present invention has following remarkable advantage:
(1) the boundary condition setting of test beam of the present invention rationally, is tested by ensuring to reverse the center of rotation of lower beam
The centre of twist of beam, and the longitudinal restraint of rolling support release test beam is used to realize the torsion of test beam for around section torsion
Turn the pure torsion at center；
(2) present invention provides reaction force by reaction frame for device, while the anti-bias dress of jack being arranged in reaction frame
It sets, ensures jack during the torsion angle for reversing end with test beam is gradually increased not by the jack anti-deflection device
Run-off the straight, jack will not be fallen；
(3) present invention uses the reflexive support pier of unsymmetric structure, can freely change by adjusting the position of reflexive support pier
The size for becoming the load arm of force, can carry out the pure torsion test of test beam of multiple groups parameter；
(4) present invention is realized by rotating stand reverses being rotatably connected for lower beam and reflexive support pier, passes through simultaneously
The upper half support with arc convex that is mutually clamped and the lower half support with arc groove realize its center of rotation and test beam
The centre of twist coincides；
(5) fabricated construction of the invention, it can be achieved that each component local quick replacement, and the torsion of the device is horizontal up and down
It is provided with multiple groups bolt hole on beam and clamping lower and upper cross-member, is conducive to that experimental study is unfolded for various sizes of test beam, leads to
It is strong with property, it can be used for the pure torsion test of all kinds of rectangle beams, have a extensive future.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram 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 schematic diagram of rolling support in the present invention；
Fig. 6 (a)~6 (d) is the structural schematic diagram of common test beam；
Fig. 7 is the torque arithmetic schematic diagram that loading device of the present invention applies.
Specific embodiment
Technical solution of the present invention is described further with reference to the accompanying drawing.
As shown in Figure 1, a kind of pure torsion test loading device of beam of the present invention, including torsion upper beam 2, the lower cross of torsion
Beam 3, clamping upper beam 4, clamping lower beam 5, reaction frame 6, jack 7, rolling support 8, reflexive support pier 9, clamp standoff pier
10, jack anti-deflection device 11 and rotating stand 12.As shown in figure 3, jack anti-deflection device 11 includes fixed plate 111, limit
Frame 112, anti-bias case 113, unidirectional hinged-support 114, cylindrical roller 115 and lateral support steel plate 116, wherein fixed plate 111, limit
Frame 112, anti-bias case 113, unidirectional hinged-support 114 and cylindrical roller 115 are 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 pedestal 603 and reaction frame diagonal brace 604.
As shown in figure 3, jack of the invention uses hydraulic pressure separating formula jack, controlled by oil pump, model
The Maximal loading that can need to apply according to test is selected, which is fixed in fixed plate 111 by bolt handstand.Its
In, the outer side wall of jack 7 is equipped with the jack anti-deflection device 11 being located in reaction frame 6, opens up corresponding positioning in fixed plate 111
Hole is mutually fixed by the threaded hole of bolt and very heavy top/bottom part；It is additionally provided with threaded hole in fixed plate, and passes through bolt and reaction frame
602 bottom Joint of crossbeam.Position-limited rack 112 is a pair of of T-steel plate that opposite top is stuck in jack outer wall, which stands
Have on plate and passes through bolt equipped with bolt hole with the consistent arc notch of jack outer wall radian, the bottom plate of the T-steel plate
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 lower placement load cells 701, the load cell 701 and jack 7 are placed on together in anti-bias case 113, the anti-bias case
It is bolted at the top of 113 bottom and unidirectional hinged-support 114.It is additionally provided on an opposite flank of anti-bias case 113 simultaneously vertical
Directly in a pair of of lateral support steel plate 116 of torsion lower beam, 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 disulfide lubrication dry film.The lateral support steel plate 116 is inserted on 601 medial surface of reaction frame column
In conduit 605, with limit anti-bias 113 side of case to displacement.Unidirectional hinged-support 114 is that a pair is hinged and relatively turnable
Cylindrical roller 115 is arranged between the unidirectional hinged-support and torsion lower beam in half hinged-support.The present invention passes through cylindrical roller 115
It rolls, the rotation of unidirectional hinged-support 114 and lateral support steel plate were loading the limitation of anti-bias case lateral displacement to ensure
It jack 7 and 701 not run-off the straight of load cell and is fallen in journey.
As shown in Fig. 2, reaction frame column 601 is symmetrical arranged, and connected by reaction frame crossbeam 602, reaction frame pedestal 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 lower beam 3 surround
It is equipped with jack 7 and jack anti-deflection device 11；Above-mentioned 602 bottom surface of reaction frame crossbeam, 601 medial surface of reaction frame column, counter-force
It erects and offers bolt hole respectively on 601 lateral surface of column.Wherein, 602 underrun bolt of reaction frame crossbeam and 111 phase of fixed plate
Connection, 601 medial surface of reaction frame column pass through bolt and 112 Joint of position-limited rack, 601 lateral surface of reaction frame column and reaction frame
604 Joint of diagonal brace.Wherein, the inside of reaction frame column 601 is additionally provided with conduit 605, which is for lateral branch to be arranged
Support steel plate 116.The present invention provides reaction force by reaction frame for device, while the anti-bias dress of jack being arranged in reaction frame
It sets, ensures jack during the torsion angle for reversing end with test beam is gradually increased not by the jack anti-deflection device
Run-off the straight, jack will not be fallen.
Loading device of the present invention includes to the torsion upper beam 2 and torsion lower beam for being placed in 1 one end upper and lower surface of test beam
3 and to the clamping upper beam 4 that is placed in 1 other end upper and lower surface of test beam and clamping lower beam 5, the torsion lower beam 3
One end is equipped with for providing the reaction frame 6 of reaction force, is equipped in the reaction frame 6 for applying load for torsion lower beam 3
The jack 7 with load cell 701；The torsion upper beam 2/ reverses to be set between lower beam 3 and 1 upper and lower surface of test beam
There is the rolling support 8 for release test beam longitudinal restraint；The lower section of the torsion lower beam 3 is rotatably connected and has unsymmetrical knot
The reflexive support pier 9 of structure, and the center of rotation and the centre of twist of test beam 1 coincide；It is fixed below the clamping lower beam 5
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
The upper end of the column is rotatably connected by rotating stand 12 and torsion lower beam 3, and the center of rotation and test of the rotating stand 12
The centre of twist of beam 1 coincides, 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 is welded, and the both 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 can freely change the size of the load arm of force by adjusting the position of reflexive support pier, can carry out the test of multiple groups parameter
The pure torsion test of beam.
As shown in figure 4, rotating stand 12 includes the upper half support 121 with arc convex and fastens with it recessed with arc
The lower half support 122 of slot, the groove of the lower half support 122 is interior to be equipped with the arc retainer 123 consistent with groove radian, the arc
Several rollers 124 are placed in shape retainer 123.Upper half support 121 with arc convex is by the thick steel through milling camber
Plate is welded with square steel plate combination, and the lower half support 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, try its center of rotation
The centre of twist for testing beam 1 is consistent.The present invention realizes the company of can be rotated of torsion lower beam and reflexive support pier by rotating stand
It connects, while the upper half support with arc convex by being mutually clamped and the lower half support with arc groove realize its center of rotation
It coincides with the centre of twist of test beam.
The present invention reverses upper beam 2 and torsion lower beam 3 is welded by steel plate, under the torsion upper beam 2 and torsion
Crossbeam 3 is equipped with the bolt hole that L group corresponds up and down and matches with test beam size, and wears stud and connected
It connects；The lower surface of torsion lower beam 3 is equipped with the M group bolt hole to match with rotating stand 12；L and M is whole not less than 2
Number.Clamping upper beam 4 and clamping lower beam 5 are welded by steel plate, and the clamping upper beam 4 and clamping lower beam 5 are equipped with N
The bolt hole that group corresponds up and down and matches with test beam size, and wear stud and be connected with clamp standoff pier 10
It connects, wherein N is the integer not less than 2.Above-mentioned fabricated construction, it can be achieved that each component local quick replacement, and the device
It is provided with multiple groups bolt hole on torsion lower and upper cross-member and clamping lower and upper cross-member, is conducive to for the expansion examination of various sizes of test beam
Research is tested, it is versatile.
As shown in figure 5, above-mentioned rolling support 8 includes several by the pole with groove steel plate 801 and be placed in groove
The segmented support construction of 802 compositions, the total length of the rolling support 8 are consistent with the width of test beam 1.Reverse upper beam with
It placed rolling support 8 respectively between torsion lower beam and the lower surface of test beam between the upper surface of test beam.
A kind of test method being carried out the pure torsion test of beam using loading device, is included the following steps:
(1), test beam 1, torsion upper beam 2, torsion lower beam 3, clamping upper beam 4, clamping lower beam 5, counter-force are got ready
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), the bottom of reaction frame 6, reaction frame diagonal brace 604, reflexive support pier 9 and clamp standoff pier 10 and ground are passed through
Ground anchor bolt Joint, reaction frame diagonal brace 604 are connected with reaction frame 6 by bolt；
(3), torsion lower beam 3, rotating stand 12 are successively connected with reflexive support pier 9 by bolt, it can be with temporarily
Support adjusts torsion lower beam 3 to level；
(4), clamping lower beam 5 is connected with clamp standoff pier 10 by bolt, and adjusts clamping lower beam 5 to water
It is flat；
(5), install test beam 1, and its torsion upper beam 2 and torsion lower beam 3 between place rolling support 8, will
Torsion upper beam 2 is connected with torsion lower beam 3, and clamping upper beam 4, clamping lower beam 5 and clamp standoff pier 10 are passed through spiral shell
Bolt is connected；
(6), the fixed plate 111 in the jack 7 with load 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 the underface of jack 7 is arranged in, very heavy
Load cell 701 is placed between top 7 and anti-bias case 113, is placed between unidirectional hinged-support 114 and torsion lower beam 3 several
A cylindrical roller 115；
(7), the load of the application of lower beam 3 vertically downward is reversed using 7 pairs of hydraulic pressure separating formula jack, loading procedure uses
By the graded loading way of power control load, until test beam 1 destroys；
(8), the data detected according to load cell 701 calculate the torque that test beam 1 is born；
(9), torsion angle caused by test beam 1 is calculated according to the data that inclinator 13 detects.
After the pure torsion test of test beam 1 for completing a kind of parameter, replaceable 1 (replaceable rotating stand when necessary of test beam
12, so that the center of rotation of rotating stand 12 matches with the centre of twist of 1 cross section of test beam) and retain remaining device, into
The pure torsion test of the test beam 1 of next kind of parameter of row.
As shown in fig. 7, the vertical force that jack 7 applies is F, it can be measured by load cell 701, torsion lower beam 3 is real
The load that border is subject to is the power F ' perpendicular to torsion lower beam 3, and the torsion angle generated is θ, can be measured by inclinator 13.Fig. 7
Middle ∠ CBD=∠ CAD=θ, BC=l, AD=h, AC=h ', it is F and lateral that power F ', which can be analyzed to the vertical force of jack application,
The horizontal force H that supporting steel plate 116 provides.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 generates is θ.
Rationally, the center of rotation by ensuring to reverse lower beam is test beam for the boundary condition setting of test beam of the present invention
The centre of twist, and the longitudinal restraint of rolling support release test beam is used to realize the torsion of test beam in the torsion of section
The pure torsion of the heart.
Claims (9)
1. a kind of pure torsion test loading device of beam, it is characterised in that: including to being placed in test beam (1) one end upper and lower surface
Torsion upper beam (2) and torsion lower beam (3) and to the clamping upper beam for being placed in test beam (1) other end upper and lower surface
(4) and clamping lower beam (5), one end of torsion lower beam (3) are equipped with the reaction frame (6) for providing reaction force,
The jack (7) with load cell (701) for applying load for torsion lower beam (3) is equipped in the reaction frame (6)；Institute
It states and is equipped with for release test beam longitudinal direction about between torsion upper beam (2)/torsion lower beam (3) and test beam (1) upper and lower surface
The rolling support (8) of beam；Being rotatably connected below torsion lower beam (3) has the reflexive support pier (9) of unsymmetric structure,
And the center of rotation and the centre of twist of test beam (1) coincide；Clamping branch is fixedly connected with below the clamping lower beam (5)
It supports pier (10)；The outer side wall of the jack (7) is equipped with the jack anti-deflection device (11) being located in reaction frame (6), the jack
Anti-deflection device (11) includes the fixed plate (111) being fixedly connected with jack top set gradually from top to bottom, for limiting
It the mobile position-limited rack (112) of jack, the anti-bias case of non-cover type (113) of the very heavy top/bottom part of carrying, unidirectional hinged-support (114) and sets
Cylindrical roller (115) in the upper surface of torsion lower beam；Be additionally provided on one opposite flank of the anti-bias case (113) perpendicular to
Reverse a pair of of lateral support steel plate (116) of lower beam.
2. the pure torsion test loading device of beam according to claim 1, 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.
3. the pure torsion test loading device of beam according to claim 1, it is characterised in that: reaction frame (6) packet
Include symmetrically arranged reaction frame column (601) and reaction frame crossbeam (602), reaction frame pedestal for connecting reaction frame column
(603), the space that the reaction frame crossbeam (602), reaction frame column (601) and torsion lower beam (3) surround is built-in with jack
(7) and jack anti-deflection device (11)；Wherein, the reaction frame crossbeam (602) is connected with fixed plate (111), the counter-force
The inside for erecting column (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).
4. the pure torsion test loading device of beam according to claim 1, it is characterised in that: the reflexive support pier
(9) the upper end of the column of the asymmetric inverted T-type structure being welded by steel plate, the reflexive support pier (9) passes through rotating stand
(12) it is rotatably connected with torsion lower beam (3), and the centre of twist of the center of rotation of the rotating stand (12) and test beam (1)
It coincides, the crossbeam of the reflexive support pier (9) is fixedly connected with the ground；Wherein the rotating stand (12) includes with arc convex
The lower half support (122) with arc groove that upper half support (121) He Yuqi fastens, in the groove of the lower half support (122)
Equipped with the arc retainer (123) consistent with groove radian, several rollers are placed in the arc retainer (123)
(124).
5. the pure torsion test loading device of beam according to claim 4, it is characterised in that: the torsion upper beam
(2) it is welded with torsion lower beam (3) by steel plate, the torsion upper beam (2) and torsion lower beam (3) are equipped in L group
Lower one-to-one correspondence and the bolt hole to match with test beam size, and wear stud and be attached；The torsion lower beam
(3) lower surface is equipped with the M group bolt hole to match with rotating stand (12)；L and M is the integer not less than 2.
6. the pure torsion test loading device of beam according to claim 1, it is characterised in that: the clamping upper beam
(4) it is welded with clamping lower beam (5) by steel plate, the clamping upper beam (4) and clamping lower beam (5) are equipped in N group
Lower one-to-one correspondence and the bolt hole to match with test beam size, and wear stud and be connected with clamp standoff pier (10),
Wherein N is 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 rolling support (8)
Including the segmented support construction that several are made 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).
8. 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 both ends of the clamp standoff pier (10) are fixedly connected with the ground by earth anchor.
9. a kind of test method that the pure torsion test of beam is carried out using any loading device of claim 1 ~ 8,
It is characterized in that: including the following steps:
(1), test beam (1), torsion upper beam (2), torsion lower beam (3), clamping upper beam (4), clamping lower beam are got ready
(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) are connected with reaction frame (6)；
(3), lower beam (3) will be reversed, rotating stand (12) is successively connected with reflexive support pier (9), adjusting torsion lower beam
(3) to horizontal；
(4), clamping lower beam (5) is connected with clamp standoff pier (10), and adjusts clamping lower beam (5) to level；
(5), install test beam (1), and its torsion upper beam (2) and reverse lower beam (3) between place rolling support
(8), torsion upper beam (2) is connected with torsion lower beam (3), by clamping upper beam (4), clamping lower beam (5) and is clamped
Support pier (10) is connected；
(6), the jack (7) with load cell (701) is connected with jack anti-deflection device (11), is placed in reaction frame
(1) in；
(7), jack (7) applies load vertically downward to torsion lower beam (3), until test beam (1) is destroyed；
(8), the data detected according to load cell (701) calculate the torque that test beam (1) is born；
(9), torsion angle caused by test beam (1) is calculated according to the data that inclinator (13) detects.
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| CN113252456B (en) * | 2021-04-12 | 2022-10-04 | 哈尔滨工业大学 | Variable-angle eccentric loading test device for truss structure |
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