Clamping device adaptive to inclined column test

Abstract

The utility model belongs to the field of gardening facility structure test loading test, and particularly relates to a clamping device adaptive to an inclined column test, which comprises a bottom plate and is connected with an MTS actuator through the bottom plate, the front side of the bottom plate is fixedly connected with a rear clamping piece seat, and the front side of the rear clamping piece seat is detachably and fixedly connected with a front clamping piece seat. Grooves are formed in the rear side of the front clamping piece seat and the front side of the rear clamping piece seat, a front U-shaped clamping piece and a rear U-shaped clamping piece are arranged between the front clamping piece seat and the rear clamping piece seat, the front U-shaped clamping piece and the front clamping piece seat are connected through a rotating shaft, the rear U-shaped clamping piece and the rear clamping piece seat are connected through a rotating shaft, a screw hole extending longitudinally is formed in the front clamping piece seat in a penetrating mode, and an adjusting screw is arranged in the screw hole. The clamping device adopting the structure can be suitable for clamping column test pieces with different section sizes, section thicknesses and various section types through the arranged U-shaped clamping pieces, is convenient to mount and dismount, and improves the applicability and test efficiency of the device.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of horticultural facilities structure test loading test, concretely relates to the clamping device of adaptation inclined column test. BACKGROUND

[0002] Inclined column is widely used in the field of horticultural facilities and other engineering structures, and the test and test around it are also the research focus of the academic circle. The horticultural facilities structure is under the action of external snow and internal hanging vine double load for a long time, and the inclined column at the bottom of the structure framework often produces large internal force and plastic failure, and seriously, it will lead to the overall collapse of the facility structure. Therefore, the study on the stress performance of inclined column is very important to ensure the safety and stability of the facility structure. Unlike vertical column, inclined column faces difficulties in clamping and out-of-plane constraint during test loading, and the existing technology cannot meet the clamping test requirements of inclined column.

[0003] Therefore, whether a clamping device that is more safe and reliable, easy to install and operate can be provided by combining the test conditions of the existing structure test site to meet the clamping requirements of test pieces of different inclined angles and sizes has become one of the problems to be solved by the technical personnel in the field. SUMMARY

[0004] To solve the problem that the stress test of the inclined member cannot be met in the prior art, the utility model provides a clamping device for inclined column test, which comprises a bottom plate, an MTS actuator connected through the bottom plate, a front side of the bottom plate fixedly connected with a rear clamping piece seat, a front side of the rear clamping piece seat detachably fixedly connected with a front clamping piece seat, recesses provided on the rear side of the front clamping piece seat and the front side of the rear clamping piece seat, front U-shaped clamping pieces and rear U-shaped clamping pieces provided between the front clamping piece seat and the rear clamping piece seat, the front U-shaped clamping pieces and the rear U-shaped clamping pieces connected through shafts between the front U-shaped clamping pieces and the front clamping piece seat and between the rear U-shaped clamping pieces and the rear clamping piece seat, and longitudinal extension screw holes provided through the front clamping piece seat and adjusting screws arranged in the screw holes. The clamping device with this structure can be applied to the clamping of column test pieces of different cross-sectional sizes, cross-sectional thicknesses and various cross-sectional types by the U-shaped clamping pieces provided, is easy to install and disassemble, and improves the applicability and test efficiency of the device.

[0005] The clamping device for inclined column test provided by the utility model comprises a bottom plate at the rear, characterized in that a front side of the bottom plate is fixedly connected with a rear clamping piece seat, a front side of the rear clamping piece seat is detachably fixedly connected with a front clamping piece seat, recesses are provided on the rear side of the front clamping piece seat and the front side of the rear clamping piece seat, front U-shaped clamping pieces and rear U-shaped clamping pieces are provided between the front clamping piece seat and the rear clamping piece seat, the front U-shaped clamping pieces and the rear U-shaped clamping pieces are connected through shafts between the front U-shaped clamping pieces and the front clamping piece seat and between the rear U-shaped clamping pieces and the rear clamping piece seat, longitudinal extension screw holes are provided through the front clamping piece seat, adjusting screws are arranged in the screw holes, and an MTS actuator is connected with the bottom plate.

[0006] The threaded holes and adjusting screws are arranged on the upper side and the lower side of the middle part of the front clamping seat, and optionally, threaded holes and adjusting screws can also be arranged on the middle part. The upper side and the lower side can realize the angle fixation of the front U-shaped clamping piece by controlling the extension length of the adjusting screws. The angle fixation cannot be realized only by arranging the threaded holes and adjusting screws on the middle part.

[0007] The specific method for adjusting the angle is as follows: after the front U-shaped clamping piece, the rear U-shaped clamping piece and the test piece therebetween are rotated to the required inclination angle, the extension distance of the adjusting screws on the upper side and the lower side of the middle part of the front clamping seat on the rear side of the front clamping seat is adjusted, and the front U-shaped clamping piece at the test angle is abutted, so that the fixation and the angle setting are completed, and the test requirements of the column test piece with different inclination angles can be realized.

[0008] The inclination angle is adjusted in the above manner, so that the test piece can be tested in the horizontal stress test in the range of 30° inclination in the front-rear direction in the vertical direction of the horizontal plane, that is, 90°±30°.

[0009] In the above structure, the MTS actuator can monitor the applied load size in real time through the sensor.

[0010] The U-shaped size of the front U-shaped clamping piece and the rear U-shaped clamping piece can be adjusted and designed according to the inclination column cross-sectional size.

[0011] The clamping device for the test of the adaptive inclined column is used in cooperation with the following device: the device comprises two limiting columns fixedly connected with the base and a cross beam fixedly connected with the two limiting columns at the top of the two limiting columns, a surrounding device for limiting the foundation of the test piece, and two opposite face outer support arms fixedly arranged inward between the two limiting columns, and the inner side of the face outer support arm is fixedly provided with a face outer sliding plate, and the two face outer sliding plates are in close abutment with the pulley assembly of the clamping device.

[0012] As a preferred, a bolt hole is longitudinally arranged through the rear clamping seat, and a bolt hole corresponding to the rear clamping seat is arranged on the front side of the bottom plate, and the rear clamping seat is connected with the bottom plate through the bolt;

[0013] The rear clamping seat and the rear U-shaped clamping piece are rotatably connected, and as a preferred, the two opposite sides of the rear clamping seat are oppositely provided with holes corresponding to the rear U-shaped clamping piece and extending in the transverse direction, and a rotating shaft is arranged in the hole, and the rear U-shaped clamping piece is rotatably connected with the rear clamping seat through the rotating shaft.

[0014] Alternatively, the two opposite sides of the rear clamping seat are oppositely provided with holes corresponding to the rear U-shaped clamping piece and extending in the transverse direction, and the specific structure is that the two opposite sides of the rear clamping seat are oppositely provided with through holes corresponding to the rear U-shaped clamping piece and extending in the transverse direction, and the rear U-shaped clamping piece is provided with a through hole at the position corresponding to the rear clamping seat at the rear of the U-shaped groove of the rear U-shaped clamping piece, and the rear U-shaped clamping piece is connected with the rear clamping seat through the rotating shaft.

[0015] In addition, other types of rotating shafts can also be used for the rotatable connection between the rear U-shaped clamping piece and the rear clamping seat, as long as the rear U-shaped clamping piece can rotate relative to the rear clamping seat.

[0016] The front clamping seat and the front U-shaped clamping piece are rotatably connected, and preferably, the transverse sides of the front clamping seat are oppositely provided with holes corresponding to the front U-shaped clamping piece and extending in the transverse direction, and a rotating shaft is arranged in the hole, and the front U-shaped clamping piece is rotatably connected to the front clamping seat through the rotating shaft.

[0017] Alternatively, the transverse sides of the front clamping seat are oppositely provided with holes corresponding to the front U-shaped clamping piece and extending in the transverse direction, and specifically, the transverse sides of the front clamping seat are oppositely provided with through holes corresponding to the front U-shaped clamping piece and extending in the transverse direction, and the front U-shaped clamping piece is provided with a through hole in front of the U-shaped groove and corresponding to the front clamping seat, and the front U-shaped clamping piece is connected to the front clamping seat through the rotating shaft.

[0018] In addition, other types of rotating shafts can also be used for the rotatable connection between the front U-shaped clamping piece and the front clamping seat, as long as the front U-shaped clamping piece can rotate relative to the front clamping seat.

[0019] Screw holes are formed in the front clamping seat and extend in the longitudinal direction on the upper and lower sides of the middle part of the front clamping seat, and adjusting screws are arranged in the screw holes, and by adjusting the distance through which the adjusting screws pass out of the rear side of the front clamping seat, the adjusting screws can be used to abut the front U-shaped clamping piece at a to-be-measured angle to fix the to-be-measured angle.

[0020] Preferably, the front side of the rear clamping seat is fixedly connected to the front clamping seat through a long bolt, the transverse sides of the rear clamping seat are provided with screw holes extending in the longitudinal direction and corresponding to the front clamping seat, the transverse sides of the front clamping seat are provided with bolt through holes corresponding to the rear clamping seat, the front clamping seat is connected to the rear clamping seat through the long bolt, and in use, the method for installing the loading end of the to-be-tested piece is as follows: first, separate the front clamping seat and the rear clamping seat, install the long bolt in the bolt through hole of the front clamping seat, place the loading end of the to-be-tested piece in the groove of the rear U-shaped clamping piece, align the screw holes extending in the longitudinal direction of the front clamping seat and the rear clamping seat, and then rotate the long bolt to assemble the front clamping seat and the rear clamping seat, so that the loading end of the to-be-tested piece is positioned between the front U-shaped clamping piece and the rear U-shaped clamping piece.

[0021] When the test is performed, the loading end of the test piece is arranged between the front U-shaped clamping piece and the rear U-shaped clamping piece of the clamping device, the front clamping piece is abutted against the rear U-shaped clamping piece through the front clamping piece seat adjusting screw, the loading end of the test piece is limited and constrained by the cooperation of the front U-shaped clamping piece and the rear U-shaped clamping piece, more specifically, the front U-shaped clamping piece is abutted against the rear U-shaped clamping piece after the front clamping piece seat and the rear clamping piece seat are connected by the long bolt, at this time, the front U-shaped clamping piece and the rear U-shaped clamping piece become a whole, the angle is limited by abutting the front U-shaped clamping piece through the up-down adjusting screw, the MTS actuator applies a force to push the clamping device to the front side, so that the clamping device drives the test piece to perform the test, and the clamping device can also be pulled to the rear side.

[0022] Specifically, when the clamping device is subjected to a force by the MTS actuator, the clamping device drives the components to be subjected to the force, and since the front U-shaped clamping piece and the rear U-shaped clamping piece are rotatably connected to the front clamping piece seat and the rear clamping piece seat through the rotating shaft, it can be expected that the relative rotation of the front U-shaped clamping piece and the rear U-shaped clamping piece may occur when the clamping device drives the components to be subjected to the force, and since the adjusting screw has been adjusted to the state that the front U-shaped clamping piece and the rear U-shaped clamping piece and the test piece therebetween are abutted at the angle to be tested before the test, the adjusting screw can apply a supporting force to the front U-shaped clamping piece to offset the torque generated by the clamping device as a whole, so that the angle of the front U-shaped clamping piece is fixed during the whole test process.

[0023] The angle of the front U-shaped clamping piece, the rear U-shaped clamping piece and the test piece therebetween of the device is fixed by adjusting the penetration distance of the adjusting screw arranged on the front clamping piece seat during the test, and no additional components for fixing the rotation between the rear clamping piece seat and the rear U-shaped clamping piece and the rotation between the front clamping piece seat and the front U-shaped clamping piece are needed, and of course, other components for fixing the rotation between the clamping piece seat and the U-shaped clamping piece can also be arranged, and the utility model does not particularly limit this.

[0024] Optionally, the long bolt and the adjusting screw each comprise an integral screw rod and a nut arranged at the end of the screw rod, and the nuts of the long bolt and the adjusting screw are located at the front end of the front clamping piece seat after installation.

[0025] The test piece is an inclined column, and the loading end of the test piece is constrained and fixed between the front U-shaped clamping piece and the rear U-shaped clamping piece.

[0026] As preferred, the range of the adjusted angle is within 30° in the front-rear direction in the vertical direction of the horizontal plane, that is, 90°±30°.

[0027] As preferred, a triangular reinforcing plate is arranged on the clamping device, the triangular reinforcing plate is four, and is respectively fixedly arranged on the horizontal sides at the top and the bottom of the clamping device, the triangular reinforcing plate is respectively provided with bolt holes corresponding to the bottom plate and the front-rear inclined connecting plate, and the triangular reinforcing plate is respectively fixedly connected to the bottom plate and the front-rear inclined connecting plate through the bolt.

[0028] The anti-face-tilting connecting plates are fixedly arranged on both sides of the clamping device in the transverse direction, and the pulley assembly is arranged outside the anti-face-tilting connecting plates.

[0029] As preferred, the bottom plate is provided with transversely extending threaded holes in the side, the anti-face-tilting connecting plates are connected with the transversely extending threaded holes of the bottom plate through bolts, the anti-face-tilting connecting plates are two and fixedly arranged on opposite sides of the bottom plate, and the pulley assembly is arranged on the other side of the anti-face-tilting connecting plates relative to the bottom plate.

[0030] As further preferred, the pulley assembly comprises mounting seats integrally welded with the anti-face-tilting connecting plates, one side of the anti-face-tilting connecting plates is connected with the transversely extending side of the bottom plate through bolts, the other side is integrally welded with the mounting seats, four groups of mounting seats are integrally welded at four corners of each anti-face-tilting connecting plate, each group of mounting seats comprises two corresponding pulley plates provided with bolt holes in the middle, and a pulley is arranged between the two pulley plates of each group of mounting seats.

[0031] As preferred, the bottom plate is provided with bolt holes corresponding to the position of the end of the MTS actuator on the rear side, and the end of the MTS actuator is fixed on the bolt holes on the rear side of the bottom plate through bolts, so as to fix the bottom plate and the end of the MTS actuator and ensure that they are tightly connected.

[0032] One end of the MTS actuator is fixed on the vertical surface of the test bench through a base and a screw rod, and the other end is connected with the clamping device through bolts.

[0033] The specific steps of the device for testing are as follows:

[0034] 1) The loading end of the to-be-tested piece is arranged between the front U-shaped clamping piece and the rear U-shaped clamping piece of the clamping device, the front clamping piece is tightly pressed on the front U-shaped clamping piece through the front clamping piece adjusting screw on the rear side, and the rear U-shaped clamping piece cooperates with the front U-shaped clamping piece to limit and constrain the to-be-tested angle of the loading end of the to-be-tested piece.

[0035] 2) The base of the to-be-tested piece is clamped and limited by the enclosing device.

[0036] 3) The switch of the MTS actuator is turned on, and the stress performance test is started.

[0037] Compared with the prior art, the clamping device for testing the adaptive inclined column has the following advantages:

[0038] (1) The U-shaped clamping piece in the clamping device can be designed according to different column sizes, and is suitable for inclined column test pieces of different cross-sectional sizes, cross-sectional thicknesses and various cross-sectional types, thereby improving the applicability of the method.

[0039] (2) the current test device cannot be used for inclined test piece stress performance loading, the existing equipment can only meet 90° vertical test piece loading, the method can realize -30°~30° (namely 90°±30°) inclined column test piece loading, and does not need to design additional power driving device, and the test piece loading can be realized by using the common MTS actuator in the structural test site.

[0040] (3) the pulley in the clamping device abuts against the out-of-plane supporting arm, sufficient lateral constraint is provided, out-of-plane instability of the inclined column test piece can be effectively avoided, and the test loading safety is ensured.

[0041] (4) the front and rear clamping piece seat bolt connection mode is adopted in the clamping device, installation and dismounting are convenient, the inclined column test piece can be quickly replaced, and the practicability and test efficiency of the device are improved.

[0042] (5) the device used in the method has the characteristics of flexible use, safety and reliability and convenient maintenance, and outstanding comprehensive benefits. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 It is the structure schematic view of the clamping device suitable for adapting inclined column test test of the utility model;

[0044] Figure 2 It is the real object real scene view of the clamping device suitable for adapting inclined column test test of the utility model;

[0045] Figure 3 It is the overall structure schematic view of the clamping device suitable for adapting inclined column test test in actual test of the utility model;

[0046] Figure 4 It is the overall structure real scene view of the clamping device suitable for adapting inclined column test test in actual test of the utility model;

[0047] Figure 5 It is the stress action schematic view of the utility model when the test piece to be tested is inclined forward, and the angle is kept fixed in test;

[0048] Figure 6 It is the stress action schematic view of the utility model when the test piece to be tested is not inclined and kept vertical, and the angle is kept fixed in test;

[0049] Figure 7 It is the stress action schematic view of the utility model when the test piece to be tested is inclined backward, and the angle is kept fixed in test.

[0050] In the figure, 1 is the clamping device, 11 is the base plate, 12 is the anti-outward tilting connecting plate, 13 is the triangular reinforcement plate, 14 is the mounting base, 15 is the pulley, 16 is the rear clamp seat, 17 is the rear U-shaped clamp, 18 is the front clamp seat, 19 is the front U-shaped clamp, 111 is the adjusting screw, 112 is the long bolt, 2 is the enclosure device, 3 is the anti-outward tilting support arm, 4 is the limiting column, 5 is the MTS actuator, 6 is the crossbeam, and 7 is the test piece. Detailed Implementation

[0051] The technical solution of this utility model will be further described below with reference to specific embodiments. These embodiments are only used to illustrate the technical solution of this utility model in more detail and should not be construed as limiting the scope of protection of this utility model.

[0052] In this utility model, Figure 3 The extension direction of the crossbeam 6 shown is taken as the transverse direction, and the horizontal orthogonal direction of the crossbeam 6 is taken as the longitudinal direction. With the crossbeam 6 as the reference, one side of the MTS actuator 5 is the rear side, and the other side is the front side.

[0053] like Figures 1-3 As shown, this utility model provides a clamping device adapted for inclined column test.

[0054] The clamping device for the inclined column test includes a clamping device 1, which includes a rear base plate 11. The front side of the base plate 11 is fixedly connected to the rear clamping plate seat 16. The front side of the rear clamping plate seat 16 is detachably fixedly connected to the front clamping plate seat 18. The rear side of the front clamping plate seat 18 and the front side of the rear clamping plate seat 16 are provided with grooves. A front U-shaped clamping plate 19 and a rear U-shaped clamping plate 17 are provided between the front clamping plate seat 18 and the rear clamping plate seat 16. The front U-shaped clamping plate 19 and the front clamping plate seat 18, and the rear U-shaped clamping plate 17 and the rear clamping plate seat 16 are all connected by a rotating shaft. The front clamping plate seat 18 is provided with a longitudinally extending screw hole and an adjusting screw 111 is provided therein. The base plate 11 at the rear of the clamping device 1 is connected to the MTS actuator 5.

[0055] At least the upper and lower sides of the middle of the front clamping plate seat 18 are provided with threaded holes and adjusting screws 111. Optionally, threaded holes and adjusting screws 111 can also be provided in the middle. The angle of the front U-shaped clamping plate 19 can be fixed by controlling the extension length of the adjusting screws 111 on the upper and lower sides. Setting only in the middle cannot achieve the purpose of angle fixation.

[0056] The specific method for adjusting the angle is: after rotating the front U-shaped clamping piece 19, the rear U-shaped clamping piece 17 and the to-be-tested piece 7 between the two to the required inclination angle, the to-be-tested piece 7 is limited to the to-be-tested angle by the MTS actuator 5 when the MTS actuator 5 exerts force on the rear clamping piece seat 16 during testing, so that the test requirements of column test pieces with different inclination angles can be met.

[0057] The inclination angle can be adjusted in the above manner, so that the to-be-tested piece 7 can be horizontally stressed in the vertical direction of the horizontal plane within the range of 30° in the front-rear direction, that is, 90°±30°.

[0058] In the above structure, the MTS actuator 5 can monitor the size of the applied load in real time through a sensor.

[0059] The U-shaped size of the front U-shaped clamping piece 19 and the rear U-shaped clamping piece 17 can be adjusted and designed according to the size of the column cross section.

[0060] The clamping device for the inclined column test is used in cooperation with the following device: the device comprises two limiting columns 4 fixedly connected to the base at the bottom and a cross beam 6 fixedly connected to the two limiting columns 4 at the top of the two limiting columns 4, a surrounding device 2 limiting the foundation of the to-be-tested piece 7, and two opposite face-external supporting arms 3 fixedly arranged inward between the two limiting columns 4, the inner side of the face-external supporting arm 3 is fixedly provided with a face-external sliding plate, and the two face-external sliding plates are in close abutment with the pulley assembly of the clamping device 1.

[0061] The rear clamping piece seat 16 is longitudinally provided with a bolt hole, and the front side of the bottom plate 11 is provided with a bolt hole corresponding to the rear clamping piece seat 16, and the rear clamping piece seat 16 is connected to the bottom plate 11 by a bolt.

[0062] The rear clamping piece seat 16 and the rear U-shaped clamping piece 17 are rotatably connected, preferably, the two sides of the rear clamping piece seat 16 are oppositely provided with holes extending in the transverse direction corresponding to the rear U-shaped clamping piece 17, and a rotating shaft is arranged in the hole, and the rear U-shaped clamping piece 17 is rotatably connected to the rear clamping piece seat 16 through the rotating shaft.

[0063] Alternatively, the rear clamping seat 16 is provided with holes corresponding to the rear U-shaped clamping piece 17 on the two opposite sides in the transverse direction, and the holes are through holes. The rear U-shaped clamping piece 17 is provided with a through hole at a position corresponding to the rear clamping seat 16 behind the U-shaped groove, and the rear U-shaped clamping piece 17 is connected to the rear clamping seat 16 through a rotating shaft.

[0064] In addition, other types of rotating shafts can be used for the rotatable connection between the rear U-shaped clamping piece 17 and the rear clamping seat 16, as long as the rear U-shaped clamping piece 17 can rotate relative to the rear clamping seat 16.

[0065] The front clamping seat 18 is rotatably connected to the front U-shaped clamping piece 19. As a preferred embodiment, the front clamping seat 18 is provided with holes corresponding to the front U-shaped clamping piece 19 on the two opposite sides in the transverse direction, and a rotating shaft is arranged in the hole. The front U-shaped clamping piece 19 is rotatably connected to the front clamping seat 18 through the rotating shaft.

[0066] Alternatively, the front clamping seat 18 is provided with holes corresponding to the front U-shaped clamping piece 19 on the two opposite sides in the transverse direction, and the holes are through holes. The front U-shaped clamping piece 19 is provided with a through hole at a position corresponding to the front clamping seat 18 in front of the U-shaped groove, and the front U-shaped clamping piece 19 is connected to the front clamping seat 18 through a rotating shaft.

[0067] In addition, other types of rotating shafts can be used for the rotatable connection between the front U-shaped clamping piece 19 and the front clamping seat 18, as long as the front U-shaped clamping piece 19 can rotate relative to the front clamping seat 18.

[0068] The front clamping seat 18 is provided with screw holes on the upper and lower sides of the middle part in the longitudinal direction, and an adjusting screw 111 is arranged in the screw hole. By adjusting the distance through which the adjusting screw 111 penetrates out of the rear side of the front clamping seat 18, the adjusting screw 111 can be used to abut the front U-shaped clamping piece 19 at a to-be-measured angle to fix the to-be-measured angle.

[0069] The front side of the rear clamp seat 16 is fixedly connected with the front clamp seat 18 through the long bolt 112, the rear clamp seat 16 is provided with a longitudinally extending threaded hole corresponding to the front clamp seat 18 on the two lateral sides, the front clamp seat 18 is provided with a bolt through hole corresponding to the rear clamp seat 16 on the two lateral sides, the front clamp seat 18 is connected with the rear clamp seat 16 through the long bolt 112, and the method for installing the loading end of the to-be-tested piece 7 in use is as follows: first, the front clamp seat 18 and the rear clamp seat 16 are separated, the long bolt 112 is installed in the bolt through hole of the front clamp seat 18, then the loading end of the to-be-tested piece 7 is placed in the groove of the rear U-shaped clamp 17, the longitudinally extending threaded holes corresponding to the front clamp seat 18 and the rear clamp seat 16 are aligned, and the front clamp seat 18 and the rear clamp seat 16 are assembled by rotating the long bolt 112, so that the loading end of the to-be-tested piece 7 is positioned between the front U-shaped clamp 19 and the rear U-shaped clamp 17.

[0070] When testing, the loading end of the to-be-tested piece 7 is arranged between the front U-shaped clamp 19 and the rear U-shaped clamp 17 of the clamping device 1, the front U-shaped clamp 19 is tightly pressed against the rear U-shaped clamp 17 through the front clamp seat 18 adjusting screw 111 passing through the rear side, and the loading end of the to-be-tested piece 7 is positioned and constrained in cooperation with the rear U-shaped clamp 17, more specifically, the front U-shaped clamp 19 is tightly pressed against the rear U-shaped clamp 17 after the front clamp seat 18 and the rear clamp seat 16 are connected through the long bolt 112, at this time, the front U-shaped clamp 19 and the rear U-shaped clamp 17 become an integral whole, and the positioning of the angle can be realized by tightly pressing the front U-shaped clamp 19 through the up-down adjusting screw 111, the MTS actuator 5 applies a force to the front side to push the clamping device 1, so that the clamping device 1 drives the to-be-tested piece 7 to test, or the clamping device 1 is pulled backward.

[0071] When the clamping device 1 is subjected to a force through the MTS actuator 5, the clamping device 1 drives the components to be subjected to a force, and since the front U-shaped clamp 19 and the rear U-shaped clamp 17 are rotatably connected with the front clamp seat 18 and the rear clamp seat 16 through the rotating shaft, it can be expected that the front U-shaped clamp 19 and the rear U-shaped clamp 17 may relatively rotate when the clamping device 1 drives the components to be subjected to a force, and since the adjusting screw 111 is adjusted to the state that the front U-shaped clamp 19, the rear U-shaped clamp 17 and the to-be-tested piece 7 therebetween are tightly pressed at the to-be-tested angle before testing, the adjusting screw 111 can apply a supporting force to the front U-shaped clamp 19 to offset the torque generated by the clamping device 1 as a whole, so that the angle of the front U-shaped clamp 19 is fixed during the whole testing process.

[0072] The angle of the front U-shaped clamping piece 19, the rear U-shaped clamping piece 17 and the to-be-tested piece 7 between the two when the device is tested is fixed by adjusting the distance of the adjusting screw 111 arranged on the front clamping piece seat 18, and no other components for fixing the rotation between the rear clamping piece seat 16 and the rear U-shaped clamping piece 17 and the rotation between the front clamping piece seat 18 and the front U-shaped clamping piece 19 need to be additionally arranged, of course, other components for fixing the rotation between the clamping piece seat and the U-shaped clamping piece can also be arranged, and the utility model does not specially limit this.

[0073] Optionally, the long bolt 112 and the adjusting screw 111 both comprise an integral screw rod and a nut arranged at the end of the screw rod, and the nuts of the long bolt 112 and the adjusting screw 111 are both located at the front end of the front clamping piece seat 18 after installation.

[0074] The to-be-tested piece 7 is an inclined column; and the loading end of the to-be-tested piece 7 is constrained and fixed between the front U-shaped clamping piece 19 and the rear U-shaped clamping piece 17.

[0075] As preferred, the range of the adjusting angle is within 30° in the front-rear direction in the vertical direction of the horizontal plane, that is, 90°±30°.

[0076] The clamping device 1 is provided with three triangular reinforcing plates 13, the three triangular reinforcing plates 13 are four in number and are fixedly arranged at the lateral sides of the top and the bottom of the clamping device 1, the three triangular reinforcing plates 13 are respectively provided with bolt holes corresponding to the bottom plate 11 and the anti-outward-inclination connecting plate 12, and the three triangular reinforcing plates 13 are fixedly connected with the bottom plate 11 and the anti-outward-inclination connecting plate 12 through bolts.

[0077] The anti-outward-inclination connecting plates 12 are fixedly arranged at the lateral sides of the clamping device 1, and the pulley assemblies are arranged at the outer sides of the anti-outward-inclination connecting plates 12.

[0078] The bottom plate 11 is provided with a horizontally extending threaded hole at the side, the anti-outward-inclination connecting plate 12 is connected with the horizontally extending threaded hole of the bottom plate 11 through a bolt, the anti-outward-inclination connecting plate 12 is two in number and is fixedly arranged at the opposite sides of the bottom plate 11, and the pulley assembly is arranged at the other side of the anti-outward-inclination connecting plate 12 relative to the bottom plate 11.

[0079] The pulley assembly comprises an integral mounting seat 14 welded with the anti-outward-inclination connecting plate 12, one side of the anti-outward-inclination connecting plate 12 is connected with the lateral side of the bottom plate 11 through a bolt, and the other side is integrally welded with the mounting seat 14, four groups of mounting seats 14 are integrally welded at the four corners of each anti-outward-inclination connecting plate 12, each group of mounting seats 14 comprises two pulley plates provided with corresponding bolt holes at the middle, and a pulley 15 is arranged between the two pulley plates of each group of mounting seats 14.

[0080] The diameter of the pulley 15 should be larger than the diagonal length of the pulley plate to ensure that the pulley 15 can be installed between the pulley plates and the outer edge thereof can abut against the out-of-plane slide plate.

[0081] The rear side of the base plate 11 is provided with bolt holes corresponding to the end position of the MTS actuator 5, and the end of the MTS actuator 5 is fixed in the bolt holes on the rear side of the base plate 11 by bolts, for fixing the base plate 11 and the end of the MTS actuator 5.

[0082] One end of the MTS actuator 5 is fixed to the vertical surface of the test bench through a base and a screw rod, and the other end is connected to the clamping device 1 through bolts, and as a preferred embodiment, the bolts connecting the end of the MTS actuator 5 and the clamping device 1 are separate components.

[0083] As a preferred embodiment, the base at the bottom of the limiting column 4 includes anchor bolts, and the bottom of the limiting column 4 is fixed to the horizontal surface of the test bench through the base with anchor bolts.

[0084] The anti-out-of-plane support arm 3 includes an out-of-plane support beam and an out-of-plane slide plate, and the out-of-plane support beam is provided with bolt holes at one end corresponding to the limiting column 4 and is provided with bolts, and the out-of-plane support beam and the limiting column 4 are fixed by bolts, thereby fixing the out-of-plane support beam and the limiting column 4.

[0085] The other end of the out-of-plane support beam opposite to the limiting column 4 is provided with a long hole, and the out-of-plane slide plate is uniformly provided with bolt holes at a height corresponding to the long hole at the end of the out-of-plane support beam, and the out-of-plane slide plate is fixedly connected to the out-of-plane support beam by bolts. The position of the bolts can be adjusted according to the installation position of the test piece, and the out-of-plane slide plate is connected to the long hole of the out-of-plane support beam, thereby improving the installation fault tolerance of the test piece.

[0086] After placing the test piece 7 to be tested on the enclosure device 2, the test piece 7 is fixed by the enclosure device 2.

[0087] When the clamping device 1 is subjected to a force by the MTS actuator 5, the clamping device 1 drives its components to bear the force, and since the front U-shaped clamping piece 19 and the rear U-shaped clamping piece 17 are rotatably connected to the front clamping piece seat 18 and the rear clamping piece seat 16 through the rotating shaft, it is expected that the front U-shaped clamping piece 19 and the rear U-shaped clamping piece 17 may rotate relative to each other when the clamping device 1 drives the components to bear the force. Since the adjusting screw 111 has been adjusted to the state that the front U-shaped clamping piece 19, the rear U-shaped clamping piece 17 and the test piece 7 therebetween are tightly abutted at the angle to be tested before the test, the adjusting screw 111 can apply a supporting force to the front U-shaped clamping piece 19 to offset the torque generated by the clamping device 1 as a whole, so that the angle of the front U-shaped clamping piece 19 is fixed during the entire test process.

[0088] As Figures 5-7As shown, when the MTS actuator 5 applies a forward or rearward force, the front U-shaped clamping piece 19, the rear U-shaped clamping piece 17 and the test piece 7 therebetween have a certain rotating tendency, at this time, the torque is offset due to the supporting effect of the adjusting screw 111, so that the angle is fixed during the test.

[0089] The physical map in the test of the clamping device suitable for testing the inclined column test is as shown in Figure 2 .

[0090] The test method of the above device is as follows:

[0091] 1) First, separate the front clamping piece seat 18 and the rear clamping piece seat 16, set the inclined test piece 7 column loading end in the groove of the rear U-shaped clamping piece 17 of the clamping device 1, install the long bolt 112 on the front clamping piece seat 18, align the corresponding longitudinally extending threaded holes on the front clamping piece seat 18 and the rear clamping piece seat 16, and then rotate the long bolt 112 to assemble the front clamping piece seat 18 and the rear clamping piece seat 16, so that the loading end of the test piece 7 is limited between the front U-shaped clamping piece 19 and the rear U-shaped clamping piece 17;

[0092] 2) Adjust the distance of the adjusting screw 111 passing out of the rear side of the front clamping piece seat 18, so that it abuts against the front U-shaped clamping piece 19 at the measured angle, so as to adjust the measured angle;

[0093] 3) The column foundation is clamped and limited by the fence device 2;

[0094] 4) Turn on the switch of the MTS actuator 5, start the inclined column stress performance test, and the yield and ultimate bearing capacity of the inclined column can be obtained by the above method.

[0095] Using the above method and device, the stress performance test of the 85° (i.e. 5° backward inclination) inclined column is carried out; the size information of the 85° inclined column is as follows:

[0096] The 85° inclined column has a length of 1700 mm, a cross-sectional size of 30 mm*75 mm*2 mm, and a wall thickness of 2 mm; the test scene is as shown in Figure 3 . The specific results are as follows:

[0097] Through detection, the yield load of the 85° inclined column is 3.49 kN, and the ultimate load is 4.05 kN.

[0098] Using the above method and device, the stress performance test of the 110° (i.e. 20° forward inclination) inclined column is carried out; the size information of the 110° inclined column is as follows:

[0099] The stress performance test of the 110° inclined column is carried out; the size information of the 110° inclined column is as follows:

[0100] 110° inclined column, test piece length 1700 mm, cross-sectional size 30 mm x 75 mm x 2 mm, wall thickness 2 mm; the specific results obtained by MTS actuator are as follows:

[0101] It is detected that the yield load of the 110° inclined column is 2.64 kN, and the ultimate load is 3.28 kN.

[0102] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any equivalent replacement, modification, etc. made by the skilled in the art within the spirit and principle of the present application without any creative labor should be included in the protection scope of the present application.

Claims

1. A clamping device adapted to the tilting column test, the clamping device (1) comprising a rear base plate (11), characterized in that, The front side of the bottom plate (11) is fixedly connected with the rear clamping seat (16), the front side of the rear clamping seat (16) is detachably fixedly connected with the front clamping seat (18), the rear side of the front clamping seat (18) and the front side of the rear clamping seat (16) are provided with grooves, the front U-shaped clamping piece (19) and the rear U-shaped clamping piece (17) are arranged between the front clamping seat (18) and the rear clamping seat (16), the front U-shaped clamping piece (19) and the rear U-shaped clamping piece (17) are connected with the front clamping seat (18) and the rear clamping seat (16) through pivots, the front clamping seat (18) is provided with a longitudinally extending screw hole, and an adjusting screw (111) is arranged in the screw hole; and the bottom plate (11) is connected with an MTS actuator (5).

2. The clamping device for the adapted tilt column test of claim 1, wherein, The rear clamping seat (16) is provided with a bolt hole in the longitudinal direction, the front side of the bottom plate (11) is provided with a bolt hole corresponding to the rear clamping seat (16) in the front side, and the rear clamping seat (16) is connected with the bottom plate (11) through a bolt; the rear clamping seat (16) is provided with a hole corresponding to the rear U-shaped clamping piece (17) in the transverse direction on the two opposite sides, and a pivot is arranged in the hole, so that the rear U-shaped clamping piece (17) is rotatably connected with the rear clamping seat (16); the front clamping seat (18) is provided with a hole corresponding to the front U-shaped clamping piece (19) in the transverse direction on the two opposite sides, and a pivot is arranged in the hole, so that the front U-shaped clamping piece (19) is rotatably connected with the front clamping seat (18); and the front clamping seat (18) is provided with a screw hole in the longitudinal direction on the upper and lower sides of the middle part, and an adjusting screw (111) is arranged in the screw hole.

3. The clamping device for the adapted tilt column test of claim 2, wherein, The front side of the rear clamping seat (16) is fixedly connected with the front clamping seat (18) through a long bolt (112), the rear clamping seat (16) is provided with a screw hole corresponding to the front clamping seat (18) in the longitudinal direction on the two opposite sides, the front clamping seat (18) is provided with a bolt hole corresponding to the rear clamping seat (16) in the transverse direction on the two opposite sides, and the front clamping seat (18) is connected with the rear clamping seat (16) through the long bolt (112).

4. The clamping device for the adapted tilt column test of claim 1 or 2 or 3, wherein: The clamping device (1) is provided with triangular reinforcing plates (13), the triangular reinforcing plates (13) are four in number and are fixedly arranged on the two opposite sides of the top and bottom of the clamping device (1) in the transverse direction, the triangular reinforcing plates (13) are provided with bolt holes corresponding to the bottom plate (11) and the anti-face outward inclined connecting plate (12), and the triangular reinforcing plates (13) are fixedly connected with the bottom plate (11) and the anti-face outward inclined connecting plate (12) through bolts.

5. The clamping device for the adapted tilt column test of claim 4, wherein, The bottom plate (11) is provided with a transversely extending threaded hole on the side surface, and the anti-face-tilting connecting plate (12) is connected to the transversely extending threaded hole of the bottom plate (11) through a bolt, the anti-face-tilting connecting plate (12) is fixed on the opposite sides of the bottom plate (11) and is provided with a pulley assembly on the other side of the bottom plate (11); the pulley assembly comprises a mounting seat (14) which is integrally welded with the anti-face-tilting connecting plate (12), the anti-face-tilting connecting plate (12) is connected to the lateral side of the bottom plate (11) through a bolt on one side, and is integrally welded with the mounting seat (14) on the other side, four groups of mounting seats (14) are integrally welded at the four corners of each anti-face-tilting connecting plate (12), each group of mounting seats (14) comprises two corresponding pulley plates which are provided with bolt holes in the middle, and a pulley (15) is arranged between the two pulley plates of each group of mounting seats (14).

6. The clamping device for the adapted tilt column test of claim 1 or 2, wherein, The bottom plate (11) is provided with a bolt hole corresponding to the position of the end of the MTS actuator (5) on the rear side, and the end of the MTS actuator (5) is fixed on the bolt hole on the rear side of the bottom plate (11) through a bolt, so as to fix the bottom plate (11) and the end of the MTS actuator (5); one end of the MTS actuator (5) is fixed to the vertical surface of the test bench through a base and a screw rod, and the other end is connected to the clamping device (1) through a bolt.

Images