CN217111870U - Pure torsion creep test device suitable for various size combined components - Google Patents
Pure torsion creep test device suitable for various size combined components Download PDFInfo
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- CN217111870U CN217111870U CN202220292642.3U CN202220292642U CN217111870U CN 217111870 U CN217111870 U CN 217111870U CN 202220292642 U CN202220292642 U CN 202220292642U CN 217111870 U CN217111870 U CN 217111870U
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Abstract
The utility model discloses a pure torsion creep test device suitable for combined members with various sizes, which can clamp and fix a test piece by taking a fixed end clamp beam and a loading end clamp beam with adjustable heights as supports; the center of a circle of the arc-shaped sliding support is designed to be coincident with the torsion center of the section of the test piece, so that the test piece is ensured to be in a pure torsion state; the height of the arc-shaped sliding support is adjusted through a plurality of steel backing plates to change the circle center position of the arc-shaped sliding support so as to be suitable for the sections of the steel-concrete combined members with different sizes and shapes; the distance between a loading point and a torsion center is controlled by placing a loading and loading device with a sliding support on the cantilever end of a clamping beam at the loading end; each part of the test device adopts a separated design, the whole test device mainly comprises steel such as a steel beam, a screw rod, a nut, a spring and a steel bar, and can be firstly prefabricated in a factory according to the design size, and then installed in a laboratory, and the test device mainly adopts mechanical connection modes such as bolts and the like so as to be convenient for installation, maintenance and debugging.
Description
Technical Field
The utility model belongs to the technical field of steel-concrete integrated configuration, especially, relate to a pure torsion creep test device and test method suitable for multiple size composite member.
Background
With the complication of a structural system and the development of a steel-concrete combined structure, various steel-concrete combined members, such as a curve-shaped steel-concrete combined box girder, a corrugated steel web pre-stressed combined box girder and the like, appear, and further tests and theoretical research are urgently needed for the torsion resistance of the emerging combined members; on the other hand, for long-term twisted components, how the torsion resistance under creep will develop is also a key basic research.
The experimental set-up for carrying out the above study needs to solve three problems: firstly, the steel-concrete combined member is in a pure torsional state, and the introduction of other non-torque loads such as bending moment, axial force, shearing force and the like must be avoided; secondly, the torsion center can be adjusted to be suitable for the sections of the steel-concrete combined members with different parameters; and thirdly, torque can be maintained, and the load size and the length of the force arm are continuously stabilized.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a creep test device for pure torsion suitable for various size combined components, so as to solve the above mentioned problems in the background art. The device can be used for carrying out pure torsional creep tests on steel-concrete combined members with different parameters, thereby providing test data support and reference for a pure torsional creep theory of a combined structure.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a pure torsion creep test device suitable for combined members with various sizes comprises a fixed end clamp beam, a loading end clamp beam, an arc-shaped sliding support, a loading holding device and a reaction frame,
the two ends of a combined member test piece are clamped and fixed by a fixed end clamping beam and a loading end clamping beam respectively, the lower part of the loading end clamping beam is arranged on an arc-shaped sliding support, one side of the loading end clamping beam extends out of a cantilever, a sliding support and a loading and holding device are sequentially arranged on the cantilever, the sliding support can rotate and slide, and the upper side of the loading and holding device is a cross beam of a reaction frame.
Furthermore, the combined member test piece is an I-shaped steel-concrete combined beam, a box-shaped steel-concrete combined beam, a U-shaped steel-concrete combined beam or a corrugated steel web combined beam.
Furthermore, the fixed end clamping beam and the loading end clamping beam respectively comprise two box-shaped steel beams, a plurality of clamping beam screws and a plurality of clamping beam nuts, each clamping beam screw penetrates through the upper box-shaped steel beam and the lower box-shaped steel beam, and the plurality of clamping beam nuts are screwed and fixed on the upper side and the lower side of each box-shaped steel beam respectively.
Further, the inner width of the box girder is larger than the diameter of the girder clamping screw.
Further, arc sliding support includes a plurality of steel tie plates, arc sliding support upper portion, the smooth rod iron of a plurality of arc sliding support and arc sliding support lower part, the top shape of arc sliding support lower part is the circular arc, and the centre of a circle of circular arc is located the cross-section centre of torsion of combination member test piece, the smooth rod iron of a plurality of arc sliding support has been placed to arc sliding support lower part, arc sliding support upper portion is placed on the smooth rod iron of a plurality of arc sliding support, install a plurality of steel tie plates on arc sliding support upper portion.
Furthermore, the height of the arc-shaped sliding support is adjusted through a plurality of steel base plates, and the steel base plates are fixed with the loading end clamping beam through a clamping beam screw rod and a clamping beam nut.
Further, sliding support includes sliding support pivot upper portion, sliding support pivot lower part, the smooth rod iron of a plurality of sliding support, two sliding support square billet and sliding support bottom plate, the sliding support bottom plate is placed in the top that the loading end pressed from both sides the roof beam, the smooth rod iron of a plurality of sliding support has been placed on the sliding support bottom plate to be fixed with two sliding support square billet, two sliding support square billet are located the both sides of the smooth rod iron of a plurality of sliding support, and the smooth rod iron top of a plurality of sliding support is sliding support pivot lower part, sliding support pivot lower part is connected with sliding support pivot upper portion through the sliding support pivot, sliding support pivot upper portion installs force sensor.
Furthermore, the fixed end clamping beam, the arc-shaped sliding support and the bottom of the reaction frame are fixed with the ground through ground anchor bolts.
Furthermore, one side of the loading end clamping beam is cantilevered out, and the extending length is not less than 1 meter.
Further, the loading is held lotus device and is included a plurality of loading nuts, a plurality of loading screw rods, jack, go up the steel sheet, a plurality of spring, lower steel sheet and force sensor for realize the loading and hold the lotus function, a plurality of loading screw rods are fixed on reaction frame crossbeam through a plurality of loading nuts, pass last steel sheet and lower steel sheet from last to down in proper order to a plurality of springs of overcoat, the steel sheet is connected to the top of a plurality of springs, and lower steel sheet is connected to the below, it has arranged a plurality of loading nuts for fixed loading screw rod to go up steel sheet upside and lower steel sheet downside, it sets up the jack to go up the steel sheet top, force sensor is installed to lower steel sheet below, force sensor's below and sliding support top are connected.
Compared with the prior art, the utility model discloses a design arc sliding support's the centre of a circle and the coincidence of test piece cross-section centre of torsion are in the pure state of turning round in order to ensure the test piece, adjust arc sliding support height through the steel cushion and change its centre of a circle position in order to be applicable to the steel-concrete composite member cross-section of different parameters, hold the control of lotus device in order to realize loading point and centre of torsion distance through the loading of placing area sliding support on the loading end presss from both sides the roof beam cantilever, both can realize applying and keeping of load, also can make torsion process in the torsion arm of force length keep unchangeable.
In summary, the pure torsion creep test device has the following advantages:
(1) and ensuring that the combined member test piece is in a pure torsion state. The arc-shaped sliding support is arranged at the lower part of the loading end clamping beam, the whole torsion process is carried out around the circle center of the arc-shaped sliding support, and the circle center of the arc-shaped sliding support is coincided with the torsion center of the section of the test piece, so that the test piece of the combined member is ensured to be in a pure torsion state, and the introduction of other non-torque loads such as bending moment, axial force, shearing force and the like is avoided.
(2) The method is suitable for steel-concrete combined members with different parameters. The steel-concrete combined member has different cross sections and shapes, the position of the torsion center is different, any test piece can be clamped and fixed through the fixed end clamping beam and the loading end clamping beam, the position of the torsion center can be adjusted to the perpendicular bisector of the arc-shaped sliding support, and the height of the arc-shaped sliding support is adjusted through the steel cushion block to change the circle center position of the arc-shaped sliding support to be superposed with the torsion center of the cross section of the test piece, so that the steel-concrete combined member can be used for combined members with different parameters.
(3) The torque during the test can be controlled. The traditional creep test device can only realize axial pressure direction loading but is difficult to realize bending moment loading, a sliding support is arranged below a loading and load-holding device, when a loading beam rotates in the twisting process, a stress point is always right below the loading and load-holding device, namely the length of a load to a twisting center in the twisting process is constant, and the loading and load-holding device can realize the application and the maintenance of the load through the combined control of a jack, a flexible spring and a pressure sensor.
(4) Simple structure and convenient construction. Whole test device mainly comprises steel such as girder steel, screw rod, nut, spring, rod iron, can be according to design size at first at the mill prefabrication, later at the laboratory installation can, mainly adopt mechanical connection modes such as bolt to installation, maintenance and debugging.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic perspective view of a pure torsional creep test device suitable for various size combined members according to the present invention;
FIG. 2 is a schematic perspective view of the arc-shaped sliding support;
FIG. 3 is a schematic perspective view of the loading and holding device;
FIG. 4 is a schematic perspective view of the sliding support;
description of the figure code: 1-a composite member test piece; 2-fixing the end clamp beam; 3-clamping the beam at the loading end; 4-arc sliding support; 5-a sliding support; 6-loading a load holding device; 7-reaction frame; 8-box steel beam; 9-clamping the beam screw; 10-clamping the beam nut; 11-a loading nut; 12-a loading screw; 13-a jack; 14-upper steel plate; 15-a spring; 16-lower steel plate; 17-a force sensor; 18-a steel backing plate; 19-the upper part of the arc sliding support; 20-smooth steel bar of arc sliding support; 21-arc sliding support lower part; 22-the upper part of the rotating shaft of the sliding support; 23-sliding support rotating shaft; 24-the lower part of the rotating shaft of the sliding support; 25-sliding support smooth steel bar; 26-sliding support square steel bars; 27-sliding support base plate.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely explained below with reference to the drawings in the embodiment of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict, and the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments.
One specific embodiment, which will be described with reference to fig. 1 to 4, is a pure torsional creep test device suitable for composite members of various sizes, and includes a fixed end clamp beam 2, a loading end clamp beam 3, an arc-shaped sliding support 4, a sliding support 5, a loading load holding device 6 and a reaction frame 7, wherein two ends of a composite member test piece 1 are respectively clamped and fixed by the fixed end clamp beam 2 and the loading end clamp beam 3, the lower part of the loading end clamp beam 3 is placed on the arc-shaped sliding support 4, one side of the loading end clamp beam 3 is cantilevered, the sliding support 5 and the loading load holding device 6 are sequentially arranged on the loading end clamp beam, the sliding support 5 can rotate and slide, and the upper side of the loading load holding device 6 is a beam of the reaction frame 7.
The combined member test piece 1 can be an I-shaped steel-concrete combined beam, a box-shaped steel-concrete combined beam, a U-shaped steel-concrete combined beam, a corrugated steel web combined beam or other combined members.
The fixed end clamping beam 2 and the loading end clamping beam 3 respectively comprise two box-shaped steel beams 8, a plurality of beam clamping screws 9 and a plurality of beam clamping nuts 10, each beam clamping screw 9 penetrates through the upper box-shaped steel beam 8 and the lower box-shaped steel beam 8, the beam clamping nuts 10 are screwed and fixed on the upper side and the lower side of each box-shaped steel beam 8 respectively, and the width of the inside of each box-shaped steel beam 8 is larger than the diameter of each beam clamping screw 9.
The height of the arc-shaped sliding support 4 is adjusted by the arc-shaped sliding support 4 through a plurality of steel backing plates 18, and the steel backing plates 18 are fixed with the loading end clamping beam 3 through a clamping beam screw rod 9 and a clamping beam nut 10.
The fixed end clamping beam 2, the arc-shaped sliding support 4 and the reaction frame 7 are fixed with the ground through ground anchor bolts.
And a cantilever at one side of the loading end clamping beam 3 extends out, and the extension length is not less than 1 meter.
The loading and holding device 6 comprises a plurality of loading nuts 11, a plurality of loading screws 12, a jack 13, an upper steel plate 14, a plurality of springs 15, a lower steel plate 16 and a force sensor 17 and is used for realizing the loading and holding functions, the plurality of loading screws 12 are fixed on a cross beam of the reaction frame 7 through the plurality of loading nuts 11, sequentially penetrate through the upper steel plate 14 and the lower steel plate 16 from top to bottom and are sleeved with the plurality of springs 15, the upper steel plate 14 is connected above the plurality of springs 15, the lower steel plate 16 is connected below the plurality of springs 15, the plurality of loading nuts 11 are arranged on the upper side of the upper steel plate 14 and the lower side of the lower steel plate 16 and are used for fixing the loading screws 12, the jack 13 is arranged above the upper steel plate 14, the force sensor 17 is installed below the lower steel plate 16, and the lower part of the force sensor 17 is connected with the top of the sliding support 5.
the utility model discloses a stiff end presss from both sides roof beam 2 and loading end clamp roof beam 3 and presss from both sides tight fixedly with combined member test piece both ends, and on arc sliding support 4 was arranged in to loading end clamp roof beam 3, arc sliding support 4's the centre of a circle and the coincidence of 1 cross-section centre of torsion of combined member test piece were in the pure state of turning round, adjusted arc sliding support 4 through steel backing plate 18 and highly changed its centre of a circle in order to be applicable to the steel-concrete combined member cross-section that has different centre of torsion. One side of the loading end clamping beam 3 is cantilevered out, a loading and holding device 6 with a sliding support 5 is arranged on the loading end clamping beam to realize the control of the distance between the loading point and the torsion center, wherein the loading and holding device 6 can realize the application and the holding of the load, and the sliding support 5 can ensure the length of the force arm to be constant in the torsion process. The upper side of the loading and holding device 6 is provided with a beam of a reaction frame 7, and the reaction frame 6, the fixed end clamping beam 2 and the arc-shaped sliding support 4 are all reliably fixed through an earth anchor bolt.
The utility model discloses a design arc sliding support 4's centre of a circle and test piece cross-section centre of torsion's coincidence is in order to ensure that the test piece is in the pure state of turning round, adjust arc sliding support 4 height through a plurality of steel backing plates and change its centre of a circle position in order to be applicable to the steel-concrete composite member cross-section of different parameters, hold the load of taking sliding support 5 through holding the load device 6 in order to realize the control of loading point and centre of torsion distance on the 3 cantilever of clamp beam of loading end, both can realize applying and keeping of load, it remains unchanged also to make torsion in-process torsion arm of force length.
The test method of the pure torsion creep test device suitable for the combined components with various sizes is as follows:
(1) manufacturing and assembling: designing the sizes of all the components of the fixed end clamp beam 2, the loading end clamp beam 3, the arc-shaped sliding support 4, the sliding support 5, the loading and holding device 6 and the reaction frame 7 according to mechanical calculation, completing the manufacture in a factory, and assembling and debugging after the transportation to a test and examination;
(2) processing a steel base plate: calculating a torsion center according to the section characteristics of the combined member test piece 1, manufacturing a plurality of steel base plates 18 with corresponding sizes, and adjusting the height of the arc-shaped sliding support 4 to enable the circle center of the arc to coincide with the torsion center of the combined member test piece 1;
(3) mounting a test piece and applying a load: hoisting the combined member test piece 1 onto a testing device, adjusting to a correct position, screwing and fixing the fixed end clamping beam 2 and the loading end clamping beam 3, applying a load by the loading and holding device 6 according to a designed torque, and screwing the loading nut 11 to finish load holding;
(4) and (3) continuous supplement: and checking the value of the force sensor 17 of the loading and holding device 6 every other day, and if the load is reduced, timely replenishing the load and then screwing the loading nut 11 tightly to continuously maintain the load until the test is finished.
The utility model can clamp the fixed test piece by using the fixed end clamping beam 2 with adjustable height and the loading end clamping beam 3 as the support; the center of the arc-shaped sliding support 4 is coincident with the torsional center of the section of the test piece, so that the test piece is ensured to be in a pure torsional state, and the introduction of other non-torque loads such as bending moment, axial force, shearing force and the like can be avoided; the height of the arc-shaped sliding support 4 is adjusted through a plurality of steel backing plates 18 to change the circle center position of the arc-shaped sliding support so as to be suitable for the sections of the steel-concrete combined members with different sizes and shapes; the distance between a loading point and a torsion center is controlled by placing a loading and loading device 6 with a sliding support 5 on the cantilever end of a loading end clamping beam 3, so that the application and the maintenance of the load can be realized, and the length of a torsion force arm can be kept unchanged in the torsion process; each part of the test device adopts a separated design, the whole test device mainly comprises steel such as a steel beam, a screw rod, a nut, a spring and a steel bar, and can be firstly prefabricated in a factory according to the design size, and then installed in a laboratory, and the test device mainly adopts mechanical connection modes such as bolts and the like so as to be convenient for installation, maintenance and debugging.
The embodiment of the present invention disclosed above is only used to help illustrate the present invention. The examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention.
Claims (10)
1. A pure torsion creep test device suitable for combined components with various sizes is characterized in that: comprises a fixed end clamping beam (2), a loading end clamping beam (3), an arc-shaped sliding support (4), a sliding support (5), a loading and holding device (6) and a reaction frame (7),
the two ends of a combined member test piece (1) are clamped and fixed by a fixed end clamping beam (2) and a loading end clamping beam (3) respectively, the lower part of the loading end clamping beam (3) is arranged on an arc-shaped sliding support (4), one side of the loading end clamping beam (3) extends out of a cantilever, a sliding support (5) and a loading holding device (6) are sequentially arranged on the loading end clamping beam, the sliding support (5) can rotate and slide, and the upper side of the loading holding device (6) is a cross beam of a reaction frame (7).
2. The purely torsional creep test apparatus suitable for use with a variety of sizes of composite members as claimed in claim 1, wherein: the combined member test piece (1) is an I-shaped steel-concrete combined beam, a box-shaped steel-concrete combined beam, a U-shaped steel-concrete combined beam or a corrugated steel web combined beam.
3. The purely torsional creep test apparatus suitable for use with a variety of sizes of composite members as claimed in claim 1, wherein: the fixed end clamping beam (2) and the loading end clamping beam (3) respectively comprise two box-shaped steel beams (8), a plurality of clamping beam screws (9) and a plurality of clamping beam nuts (10), each clamping beam screw (9) penetrates through the upper box-shaped steel beam and the lower box-shaped steel beam (8), and the plurality of clamping beam nuts (10) are screwed and fixed on the upper side and the lower side of each box-shaped steel beam (8).
4. The purely torsional creep test apparatus suitable for use with a plurality of sizes of composite members as claimed in claim 3, wherein: the internal width of the box-shaped steel beam (8) is larger than the diameter of the beam clamping screw (9).
5. The purely torsional creep test apparatus suitable for use with a variety of sizes of composite members as claimed in claim 1 or 3 or 4, wherein: arc sliding support (4) include a plurality of steel tie plates (18), arc sliding support upper portion (19), the smooth rod iron (20) of a plurality of arc sliding support and arc sliding support lower part (21), the top shape of arc sliding support lower part (21) is the circular arc, and the centre of a circle of circular arc is located the cross-section centre of torsion of combination member test piece (1), the smooth rod iron (20) of a plurality of arc sliding support have been placed to arc sliding support lower part (21), place on the smooth rod iron (20) of a plurality of arc sliding support on arc sliding support upper portion (19), install a plurality of steel tie plates (18) on arc sliding support upper portion (19).
6. The purely torsional creep test apparatus suitable for use with a variety of sizes of composite members as claimed in claim 5, wherein: the height of the arc-shaped sliding support (4) is adjusted through a plurality of steel base plates (18) by the arc-shaped sliding support (4), and the steel base plates (18) are fixed with the loading end clamping beam (3) through the beam clamping screw (9) and the beam clamping nut (10).
7. The purely torsional creep test apparatus suitable for use with a variety of sizes of composite members as claimed in claim 1, wherein: the sliding support (5) comprises a sliding support rotating shaft upper part (22), a sliding support rotating shaft (23), a sliding support rotating shaft lower part (24), a plurality of sliding support smooth steel bars (25), two sliding support square steel bars (26) and a sliding support bottom plate (27), the sliding support base plate (27) is arranged above the loading end clamping beam (3), a plurality of sliding support smooth steel bars (25) are arranged on the sliding support base plate (27), two sliding support square steel bars (26) are fixed, the two sliding support square steel bars (26) are positioned at two sides of a plurality of sliding support smooth steel bars (25), the sliding support rotating shaft lower part (24) is arranged above the plurality of sliding support smooth steel bars (25), the lower part (24) of the sliding support rotating shaft is connected with the upper part (22) of the sliding support rotating shaft through a sliding support rotating shaft (23), and a force sensor (17) is arranged on the upper part (22) of the rotating shaft of the sliding support.
8. The purely torsional creep test apparatus suitable for use with a variety of sizes of composite members as claimed in claim 1, wherein: the bottom of the fixed end clamping beam (2), the arc-shaped sliding support (4) and the reaction frame (7) are fixed with the ground through ground anchor bolts.
9. The purely torsional creep test apparatus suitable for use with a variety of sizes of composite members as claimed in claim 1, wherein: and a cantilever at one side of the loading end clamping beam (3) extends out, and the extension length is not less than 1 meter.
10. The purely torsional creep test apparatus suitable for use with a variety of sizes of composite members as claimed in claim 1, wherein: the loading and holding device (6) comprises a plurality of loading nuts (11), a plurality of loading screw rods (12), a jack (13), an upper steel plate (14), a plurality of springs (15), a lower steel plate (16) and a force sensor (17) and is used for realizing the loading and holding functions, the plurality of loading screw rods (12) are fixed on a cross beam of the reaction frame (7) through the plurality of loading nuts (11), sequentially penetrate through the upper steel plate (14) and the lower steel plate (16) from top to bottom and are sleeved with the plurality of springs (15), the upper steel plate (14) is connected above the plurality of springs (15), the lower steel plate (16) is connected below the plurality of springs (15), the plurality of loading nuts (11) are arranged on the upper side of the upper steel plate (14) and on the lower side of the lower steel plate (16) and are used for fixing the loading screw rods (12), the jack (13) is arranged above the upper steel plate (14), and the force sensor (17) is arranged below the lower steel plate (16), the lower part of the force sensor (17) is connected with the top of the sliding support (5).
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| CN202220292642.3U CN217111870U (en) | 2022-02-14 | 2022-02-14 | Pure torsion creep test device suitable for various size combined components |
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| CN202220292642.3U CN217111870U (en) | 2022-02-14 | 2022-02-14 | Pure torsion creep test device suitable for various size combined components |
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| CN202220292642.3U Active CN217111870U (en) | 2022-02-14 | 2022-02-14 | Pure torsion creep test device suitable for various size combined components |
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