CN109632468B - Assembled double-cutter hinged support suitable for pressure test of round steel pipes with various diameters - Google Patents
Assembled double-cutter hinged support suitable for pressure test of round steel pipes with various diameters Download PDFInfo
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- CN109632468B CN109632468B CN201910017436.4A CN201910017436A CN109632468B CN 109632468 B CN109632468 B CN 109632468B CN 201910017436 A CN201910017436 A CN 201910017436A CN 109632468 B CN109632468 B CN 109632468B
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Abstract
The invention relates to the field of structural tests, in particular to an assembled double-cutter hinged support system suitable for a compression test of round steel pipes with various diameters; the middle arc 2127474of the fixing component, the lateral cover plate of the fixing clamp, the connecting bottom plate of the fixing component, the middle plate provided with orthogonal grooves and the lower connecting plate provided with cutter hinges on the surface are included, bolt holes are formed in clamping plates on two sides of the middle arc 21274, nuts of connecting bolts can be adjusted, the purpose of fixing steel pipes with different diameters is achieved, long round bolt holes are formed in two sides of the periphery of the middle arc 21274, the purposes of axial compression and quantitative eccentric compression can be achieved by changing the position of the fixing bolts and adjusting the relative positions of the connected steel pipes and the clamp, and the fixing component connecting bottom plate and the lower connecting plate provided with the cutter hinges are matched with the middle plate provided with the orthogonal grooves, so that the bidirectional hinged support is achieved. Because the whole support device is connected in a pure assembly mode, the support device has a series of advantages of wide application range, easiness in disassembly, strong adjustability and the like.
Description
Technical Field
The invention relates to the field of civil engineering structure tests, in particular to an assembled bidirectional knife hinge support system for axial compression and eccentric compression tests of round steel pipes with different diameters.
Background
The circular steel tube is the most common component form in the building engineering, and is widely applied to the projects such as stadiums, airport terminal buildings, power transmission towers, bridges and the like. The axial compression and eccentric compression are the most typical stress modes of the round steel pipe component in the service process, and the axial compression and eccentric compression experiment is the most important technical means for researching the mechanical property of the round steel pipe component.
The boundary support condition is a key factor influencing the compression mechanical test of the circular steel tube member, and the support form commonly used in the circular steel tube axis compression test at present mainly comprises: welding plate type, ball hinge type, knife hinge type.
The welding plate type support is used for directly welding the two ends of the round steel pipe to the plate, so that the steel pipe base metal can be damaged in the welding process, and the accuracy of an experiment is obviously influenced. In addition, the constraint form of the welding plate type support is too strong and is close to consolidation constraint, so that the length of the steel pipe required by the test on the compression performance of the steel pipe with the same slenderness ratio is twice of that of other hinged supports, and the test is not favorable for experiment development.
The spherical hinge type support is characterized in that a cambered surface groove is formed in the top surface of the lower plate, a cambered surface bulge is welded to the bottom surface of the upper connecting plate, and the groove is in contact with the bulge to form hinge joint. However, because the contact area of the groove and the protrusion is large, when the axial force is large, the friction force between the groove and the protrusion is too large, and the problem that the node cannot rotate exists in the practical experiment process.
The cutter-hinge type support has good rotating performance, but the components of the traditional cutter-hinge type support and the spherical hinge type support are often fixed by gypsum, the installation efficiency is low, particularly, an eccentric compression test is carried out, the relative positions of the components and the support cannot be adjusted in the fixing mode of the traditional cutter-hinge type support and the spherical hinge type support, the eccentric positions cannot be quantized, the difficulty of precision control is greatly increased, and the potential safety hazard that a connecting plate falls off exists in the experimental process due to the reason that a contact plate is separated in the traditional cutter-hinge type support and the spherical hinge type support.
Therefore, it is necessary to develop an assembled double-cutter hinged support which is easy to detach, adjustable, safe and flexible and suitable for the stress and eccentric stress tests of round steel pipe axes with different diameters, so that the efficiency and the precision of the stress mechanical test of the round steel pipe component are improved, and technical support is provided for the mechanical property experimental study of the round steel pipe component.
Disclosure of Invention
The invention aims to provide an assembled double-cutter hinged support system suitable for compression tests of round steel pipes with various diameters, which comprises axial compression and eccentric compression tests of the round steel pipes and solves the test control and safety problems that the axes of the round steel pipes are difficult to align, the supports are difficult to rotate, the eccentric degree in the eccentric compression tests is difficult to control quantitatively, a connecting plate falls off in the test process and the like in the axial compression test process of the round steel pipes. The characteristics of wide application range, easy disassembly and strong adjustability are realized to solve the problems of low time installation efficiency, difficult cleaning and the like caused by welding or gypsum pouring fixation of the traditional device.
In order to solve the above purpose, the invention adopts the following technical scheme:
the utility model provides an assembled double knives hinge support suitable for multiple diameter circular steel pipe compression test, includes two middle part circular arcs of fixed component 21274, the component fixed plate that the side direction apron, the bottom of shape anchor clamps, fixed clamp are equipped with the sword hinge, is equipped with the intermediate lamella that upper surface recess and lower surface recess are the orthogonality, the top is equipped with the lower part board of sword hinge. The whole test loading fixing device is formed by the assembly connection of all the components of the support system.
The test component is fixed through a middle arc 21274, the middle arc 21274is fixedly connected with the lateral cover plate and the component fixing plate through bolts; the component fixing plate with the cutter hinges at the lower part and the lower plate with the cutter hinges at the upper part are matched with the middle plate with the upper surface grooves and the lower surface grooves which are orthogonal, so that a bidirectional hinged support is realized; the lower plate is connected with a reaction frame system through bolts to form the whole test loading fixing device.
Preferably, the middle arc v 21274the shaped clamp comprises a middle arc part for fixing the steel pipe, a straight section clamping plate connected with the arc part, an outer side lug plate and a first long bolt rod connected with the arc part, the straight section clamping plate is provided with a bolt hole, the fastening degree of the connecting bolt can be adjusted, the purpose of fixing steel pipes with different diameters is achieved, the outer side lug plate is provided with a long bolt hole, the bolt can freely slide left and right in the outer side lug plate, the relative position of the connected steel pipe and the clamp is adjusted by changing the position of the first long bolt rod, and the purpose of axial center compression and quantitative eccentric compression is achieved.
Preferably, the component fixing plate comprises an upper lug plate groove, a first connecting bottom plate, a first side round lug and a lower knife hinge, the upper lug plate groove is matched with the first long bolt rod and provides inward thrust for a middle arc 21274, and the shape clamp provides inward thrust to strengthen the stability of steel pipe fixing.
Preferably, the intermediate plate includes connecting plate and second side round ear, and the connecting plate upper and lower surface all is equipped with the recess, and the recess of the upper surface of connecting plate and the recess direction of lower surface are the quadrature, and the upper surface recess forms the articulated connection of a direction with the cooperation of component fixed plate lower part sword hinge.
Preferably, the lower plate comprises a second connecting bottom plate, an upper cutter hinge and a second long bolt rod, the direction of the upper cutter hinge is orthogonal to the direction of the lower cutter hinge of the member fixing plate, the upper cutter hinge is matched with a groove on the lower surface of the middle plate to form hinged connection in the other direction, and therefore the purpose of bidirectional hinge is achieved.
Preferably, the second long bolt rod of lower part board cooperates with intermediate lamella second side circle ear, the first side circle ear of component fixed plate, realizes the temporary fixation of first connecting bottom plate, intermediate lamella and second connecting bottom plate, and side circle ear hole diameter is greater than the peg diameter, and peg nut diameter is greater than side circle ear hole diameter, and the stability of support when the component installation is ensured through tightening the nut during installation, during the loading test, through loosening nut tightening degree, realizes sword hinged-support free rotation, guarantees experimental safety simultaneously.
Preferably, the first long bolt rod connected with the circular arc part is welded at the upper edge part of the circular arc part to increase the middle circular arc 21274and the out-of-plane overturn resistance of the clamp.
Preferably, the upper lug plate groove of the component fixing plate is an unsealed slideway, so that the second long bolt rod can be directly put into the groove from the upper part, and the mounting difficulty is reduced.
Preferably, the lower plate edge is provided with bolt holes with fixed intervals, the lower plate edge can be connected and fixed with loading systems such as reaction frames with different widths through high-strength bolts, and the position of the whole support device can be adjusted.
Preferably, the support device is connected in a pure assembly mode, has a series of advantages of wide application range, easiness in disassembly, quickness in replacement, strong adjustability and the like, and is suitable for connecting the axial pressure test and the bias test of circular steel pipes with different diameters.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
firstly, compared with the existing welding plate type, ball hinge type and traditional knife hinge type hinged supports, the assembly type bidirectional knife hinge support system can fix steel pipe members with different diameters through an assembly type clamp, and the problems of low installation efficiency, difficulty in cleaning and the like caused by welding or gypsum pouring and fixing are avoided; and the middle part is in an arc shape of 21274, the first long bolt rod on the clamp can be directly put into the groove from the upper part, and the mounting difficulty is reduced. Has the advantages of easy disassembly, convenient cleaning and reuse and high installation efficiency.
Secondly, compared with the existing test support, the invention can adjust the relative position of the connected steel pipe and the clamp by changing the position of the first long bolt rod, and can simultaneously realize the purposes of axial center compression and quantitative eccentric compression; and the edge of the lower plate is provided with bolt holes with fixed intervals, the lower plate can be connected and fixed with loading systems such as reaction frames with different widths through high-strength bolts, the position of the whole support device can be adjusted, and when a certain deviation exists in the loading device, the influence can be eliminated by adjusting the position of the lower plate. The method has the characteristics of high test precision and good controllability.
Finally, the bottom surface cutter hinge direction of the upper connecting plate is orthogonal to the top surface cutter hinge direction of the lower component fixing plate, the upper cutter hinge and the lower cutter hinge are matched with the groove in the lower surface of the middle plate, so that the purpose of bidirectional hinge can be realized, and during a loading test, the cutter hinge support can freely rotate while the safety of the test is greatly improved by adjusting the tightness degree of the connecting nut on the second long bolt rod.
The invention can be widely applied to the field of the axial compression and eccentric compression tests of circular steel tubes with different diameters in civil engineering structures.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a middle arc 21274H-shaped clamp.
Fig. 2 is a schematic structural view of a lateral cover plate of the fixing jig.
Fig. 3 is a structural schematic diagram of a component fixing plate with a knife hinge at the bottom.
Fig. 4 is a schematic structural view of an intermediate plate provided with upper surface grooves and lower surface grooves in orthogonality.
Fig. 5 is a schematic view of the structure of the lower plate with a knife hinge on the top.
Fig. 6 is a schematic view showing the overall structure of the fabricated bidirectional knife and hinge support of the present application.
Fig. 7 is an exploded view of the fabricated bidirectional knife and reamer support of the present application.
Reference numerals: 11-middle arc part of fixed steel pipe, 12-straight section clamp plate section connected with arc part, 13-outside ear plate, 14-first long bolt rod, 31-upper ear plate groove, 32-first connecting bottom plate, 33-first side round ear, 34-lower knife hinge, 41-connecting plate, 42-second side round ear, 51-second connecting bottom plate, 52-upper knife hinge, 53-second long bolt rod, 61-round steel pipe in axial compression and eccentric compression test.
Detailed Description
The assembled double-cutter hinge support system suitable for the compression test of round steel pipes with various diameters is described below by combining figures 1 to 7, the device comprises a middle circular arc (21274), a shape clamp shown in figure 1, a lateral cover plate of the fixing clamp shown in figure 2, a component fixing plate with cutter hinges arranged at the bottom, an intermediate plate with upper surface grooves and lower surface grooves orthogonal shown in figure 3, and a lower plate with cutter hinges arranged at the top, and is shown in figure 4, and the lower plate is shown in figure 5.
The middle arc part 11 of the clamp can be in contact with a round steel pipe to be tested, the fastening degree of a connecting bolt can be adjusted, the purpose of fixing steel pipes with different diameters is achieved, the outer side ear plate 13 is provided with a long round bolt hole, the bolt can freely slide left and right in the long round bolt hole, the relative position of the connected steel pipe and the clamp is adjusted by changing the position of the first long bolt rod, and the purposes of axial center compression and quantitative eccentric compression are achieved.
The lateral cover plate of the fixing clamp can be connected with the middle arc 21274, the outer side ear plate of the shape clamp is connected through a bolt to enhance the middle arc 21274, the outer anti-overturning capacity of the shape clamp is used for preventing test failure and even damage of a knife and hinge support system caused by overlarge lateral movement of a test steel pipe under certain test conditions.
The component fixing plate is arranged below the middle arc 21274, the upper lug plate groove 31 of the component fixing plate can be matched with the middle arc 21274, the first long bolt rod 14 of the shape clamp is screwed to form the middle arc 21274, the shape clamp provides inward thrust, and the stability of steel pipe fixing is enhanced.
The first side round lug 33 of the component fixing plate can be connected with the middle round lug 21274, the outer side lug plate 13 and the lateral cover plate of the clamp are connected through bolts, so that the upper part of the support system forms a whole, and the relative position is kept unchanged in the loading process.
The middle plate is arranged below the component fixing plate, grooves are formed in the upper surface and the lower surface of the middle plate, the directions of the grooves are orthogonal, and the grooves in the upper surface are matched with the knife hinges 34 on the lower portion of the component fixing plate to form hinged connection in one direction.
The lower plate is arranged below the middle plate, the direction of the top knife hinge 52 of the lower plate is orthogonal to the direction of the lower knife hinge 34 of the component fixing plate, and the upper knife hinge 52 is matched with the groove on the lower surface of the middle plate to form hinged connection in the other direction, so that the aim of bidirectional hinging is fulfilled.
The second long bolt pole 53 and the intermediate lamella second side round ear 42 of lower part board, the cooperation of component fixed plate first side round ear 33, realize first connecting bottom plate, the temporary fixation of intermediate lamella and second connecting bottom plate, side round ear hole diameter is greater than the peg diameter, peg nut diameter is greater than side round ear hole diameter, the stability of support when the component installation is ensured through tightening the nut during installation, during the loading test, through loosening nut tightening degree, realize sword hinged-support free rotation, guarantee experimental safety simultaneously.
The upper lug plate groove 31 of the component fixing plate 3 is an unclosed slideway, so that the first long bolt rod 14 can be directly put into the groove from the upper part, and the mounting difficulty is reduced.
The edge of the lower plate is provided with bolt holes with fixed intervals, and the lower plate can be connected and fixed with loading systems such as reaction frames with different widths through high-strength bolts, and the position of the whole support device can be adjusted.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the general idea of the present invention.
Finally, it should be noted that the above examples are only used for illustrating the technical solutions of the present invention and are not limited.
Claims (9)
1. An assembled double-cutter hinged support suitable for compression tests of round steel pipes with various diameters comprises two middle arcs (21274) of a fixed component, a lateral cover plate of the fixed component, a component fixing plate with cutter hinges at the lower part, an intermediate plate with an upper surface groove and a lower surface groove which are orthogonal, and a lower plate with cutter hinges at the upper part; the method is characterized in that: the test component is fixed by the middle arc 21274and the middle arc 21274; the component fixing plate with the cutter hinges at the lower part and the lower plate with the cutter hinges at the upper part are matched with the middle plate with the orthogonal grooves, so that a bidirectional hinged support is realized; the lower plate is connected with a reaction frame system through bolts to form a whole test loading fixing device; middle part circular arc 21274, shape anchor clamps are including the middle part circular arc part (11) of fixed steel pipe, straight section splint (12) that link to each other with the circular arc part, outside otic placode (13) and the first long bolt pole (14) that link to each other with the circular arc part, straight section splint (12) are opened has the bolt hole, and adjustable connecting bolt's fastening degree realizes the purpose of fixed different diameter steel pipe, and outside otic placode (13) are opened has the long round bolt hole, and the bolt can freely slide about its inside, through the position that changes first long bolt pole, adjusts the relative position of connected steel pipe and anchor clamps, realizes the purpose that axle center pressurized and ration eccentric pressurized.
2. The fabricated double-bladed hinge support of claim 1, wherein: the component fixing plate comprises an upper lug plate groove (31), a first connecting bottom plate (32), a first side round lug (33) and a lower knife hinge (34), wherein the upper lug plate groove (31) is matched with a first long bolt rod (14) and provides inward thrust for a middle arc (21274), and a shape clamp is used for enhancing the stability of steel pipe fixing.
3. The fabricated double-bladed hinge support of claim 1, wherein: the intermediate plate includes connecting plate (41) and second side round ear (42), and the connecting plate upper and lower surface all is equipped with the recess, and the recess of the upper surface of connecting plate and the recess direction of lower surface are the quadrature, and the upper surface recess forms the articulated connection of a direction with component fixed plate lower part sword hinge (34) cooperation.
4. The fabricated double-bladed hinge support of claim 3, wherein: the lower plate comprises a second connecting bottom plate (51), an upper knife hinge (52) and a second long bolt rod (53), the direction of the upper knife hinge (52) is orthogonal to the direction of the lower knife hinge (34) of the component fixing plate, the upper knife hinge (52) is matched with a groove on the lower surface of the middle plate to form hinged connection in the other direction, and the purpose of bidirectional hinge is achieved.
5. The fabricated double-bladed hinge support of claim 1, wherein: second long bolt pole (53) and intermediate lamella second side round ear (42) of lower part board, the cooperation of component fixed plate first side round ear (33), realize first connecting bottom plate, the temporary fixation of intermediate lamella and second connecting bottom plate, side round ear hole diameter is greater than the peg diameter, peg nut diameter is greater than side round ear hole diameter, the stability of support when the component installation is ensured through tightening the nut during, during the loading test, through loosening nut tightening degree, realize sword hinge support free rotation, guarantee experimental safety simultaneously.
6. The fabricated double-bladed hinge support of claim 1, wherein: a first long bolt rod (14) connected with the arc part is welded at the upper edge part of the arc part to increase the middle arc 21274and the out-of-plane anti-overturning capability of the clamp.
7. The fabricated double-bladed hinge support of claim 2, wherein: the upper lug plate groove (31) of the component fixing plate is an unsealed slideway, so that the first long bolt rod (14) can be directly put into the groove from the upper part, and the mounting difficulty is reduced.
8. The fabricated double-bladed hinge support of claim 1, wherein: the edge of the lower plate is provided with bolt holes with fixed intervals, and the lower plate can be connected and fixed with loading systems with different widths through high-strength bolts, and the position of the whole support device can be adjusted.
9. The fabricated double-bladed hinge support of claim 1, wherein: the stress modes of the round steel pipes with different diameters are axial compression and eccentric compression.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910017436.4A CN109632468B (en) | 2019-01-08 | 2019-01-08 | Assembled double-cutter hinged support suitable for pressure test of round steel pipes with various diameters |
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| CN201910017436.4A CN109632468B (en) | 2019-01-08 | 2019-01-08 | Assembled double-cutter hinged support suitable for pressure test of round steel pipes with various diameters |
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| CN109632468A CN109632468A (en) | 2019-04-16 |
| CN109632468B true CN109632468B (en) | 2021-06-11 |
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