CN111948025A - Steel plate local buckling test device with sliding shaft and test method thereof - Google Patents
Steel plate local buckling test device with sliding shaft and test method thereof Download PDFInfo
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- CN111948025A CN111948025A CN202010898697.4A CN202010898697A CN111948025A CN 111948025 A CN111948025 A CN 111948025A CN 202010898697 A CN202010898697 A CN 202010898697A CN 111948025 A CN111948025 A CN 111948025A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 180
- 239000010959 steel Substances 0.000 title claims abstract description 180
- 238000012360 testing method Methods 0.000 title claims abstract description 109
- 238000010998 test method Methods 0.000 title claims abstract description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 6
- 230000000452 restraining effect Effects 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 239000010730 cutting oil Substances 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 239000004567 concrete Substances 0.000 description 11
- 238000011160 research Methods 0.000 description 9
- 239000002131 composite material Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
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- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 239000007787 solid Substances 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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Abstract
The invention discloses a steel plate local buckling test device with a sliding shaft and a test method thereof, wherein the test device comprises a pedestal, an axial loading assembly, a non-loading edge constraint assembly and a one-way constraint assembly; the pedestal is provided with a plurality of axial grooves in an axial penetrating manner, the unidirectional constraint assembly comprises a plurality of groups of threaded ejector rods, the number of the threaded ejector rods is equal to the number of the axial grooves, each group of threaded ejector rods comprises at least one threaded ejector rod, all the threaded ejector rods in each group of threaded ejector rods are correspondingly inserted into each axial groove, the threaded ejector rods are sleeved with pressure sensors and nuts, the lower end faces of the pressure sensors are abutted to the pedestal, the upper end faces of the pressure sensors are abutted to the nuts, and the top ends of the threaded ejector rods are abutted to the test piece steel plate; the axial loading assemblies are respectively arranged on the front side and the rear side of the test piece steel plate in the axial direction and provide axial force for the test piece steel plate; the non-loading edge constraint components are respectively arranged on the left side and the right side of the test piece steel plate in the vertical axial direction.
Description
Technical Field
The invention relates to the technical field of steel plate buckling tests, in particular to a steel plate local buckling test device with a sliding shaft and a test method thereof.
Background
In recent years, with the rapid development of social and economic benefits, a large number of high-rise and super high-rise buildings begin to emerge, and steel-concrete composite members such as pure steel plate shear walls, steel plate concrete composite shear walls, steel pipe concrete columns and the like are increasingly applied to the building structures. However, with the application of high-strength concrete and high-strength steel, the width-to-thickness ratio of the steel plate outside these members is increasing, and the problem of local buckling of the steel plate is becoming more and more prominent, and is receiving attention from engineers. In the aspect of cost economy, when the thin-wall combined member is adopted, the mechanical properties of the materials of steel and concrete are required to be fully exerted, and the yield strength of the steel needs to be fully developed. In terms of structural safety, the occurrence of the problem of local buckling of the steel plate can lead to early damage of the member and even integral failure of the structure, thereby causing disasters. Therefore, under the common requirements of economy and safety, it is necessary to study the problem of local buckling of the composite structural steel sheet. Only by clarifying the rules and modes of the local buckling of the steel plate, the method can be used for taking targeted measures to avoid or delay the local buckling of the steel plate. The method not only can generate good economic significance and adapt to the trend of times development, but also has important significance for the development and application of steel-concrete composite structures and thin-wall steel structures in engineering.
Nowadays, some scholars at home and abroad begin to perform related research on the local buckling performance of concrete-filled steel tubular columns with square, rectangular and other sections. However, the current research on the local buckling of the steel plate is not comprehensive, and most of the research is in a finite element and theoretical research stage, and the research result cannot be compared and corrected with accurate test data. The reason is that a test device for systematically researching the local buckling of the steel plate is lacking at home and abroad. And in only a plurality of existing test researches aiming at the local buckling performance of the steel plate on the outer side of the steel tube concrete column, a plurality of problems also exist. Such as: the loading design is unreasonable, the loading end equipment cannot accurately and independently apply load to the steel plate, the side restraining force generated by the inner side concrete cannot be considered, the effect of boundary conditions cannot be accurately considered, the current test research is based on specific components, the test result has no general significance, and the like. The problems directly restrict the research process of the local buckling performance of the steel structure and the combined structure.
Therefore, it is necessary to provide a steel plate buckling test loading device for the action between the steel plate and the concrete and the actual boundary condition of the steel plate.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a steel plate local buckling test device with a sliding shaft, which is used for researching the local buckling performance of a steel plate under different boundary conditions of a non-loading edge and under the condition of unidirectional constraint.
Another object of the present invention is to: provided is a test method of the steel plate local buckling test device with the sliding shaft.
The technical scheme of the invention is as follows: a steel plate local buckling test device with a sliding shaft is used for researching the local buckling performance of a test piece steel plate and comprises a pedestal, an axial loading assembly, a non-loading edge constraint assembly and a one-way constraint assembly;
the pedestal is provided with a plurality of axial grooves in an axial penetrating manner, the unidirectional constraint assembly comprises a plurality of groups of threaded ejector rods, the number of the threaded ejector rods is equal to the number of the axial grooves, each group of threaded ejector rods comprises at least one threaded ejector rod, all the threaded ejector rods in each group of threaded ejector rods are correspondingly inserted into each axial groove, the threaded ejector rods are sleeved with pressure sensors and nuts, the lower end faces of the pressure sensors are abutted to the pedestal, the upper end faces of the pressure sensors are abutted to the nuts, and the top ends of the threaded ejector rods are abutted to the test piece steel plate;
the axial loading assembly is respectively arranged on the front side and the rear side of the test piece steel plate in the axial direction, and comprises two clamping steel plates, a movable steel plate, a guide rail and a pushing mechanism, wherein the two clamping steel plates jointly clamp one axial end of the test piece steel plate and are fixed through bolts;
the perpendicular axial left and right sides of test piece steel sheet is located respectively to non-loading limit restraint subassembly, non-loading limit restraint subassembly includes fixing base and sliding shaft, fixing base and pedestal fixed connection, the inside of fixing base is equipped with the sliding tray along the axial, the sliding tray is the cylinder type, the trompil is seted up towards the test piece steel sheet direction to the sliding tray, in the sliding shaft embedding sliding tray and with sliding tray sliding connection, the sliding shaft can rotate from top to bottom in the sliding tray, the perpendicular axial both ends of test piece steel sheet are connected with the sliding shaft respectively.
Further, the centre gripping steel sheet is the L type, and the centre gripping steel sheet includes grip block and the fixed plate that mutually perpendicular connects, and the common centre gripping test piece steel sheet of grip block of two centre gripping steel sheets axial one end is and pass through the bolt fastening, and the fixed plate of two centre gripping steel sheets passes through the bolt fastening respectively to the activity steel sheet.
Furthermore, a first rib plate is arranged on the clamping steel plate, and two sides of the first rib plate are respectively welded with the clamping plate and the fixing plate. Through setting up first floor, avoid axial loading in-process centre gripping steel sheet atress to warp.
Further, the movable steel plate extends towards the axial direction of the pushing mechanism to form a sliding block, the sliding block is connected with the guide rail in a sliding mode, a second rib plate is arranged between the sliding block and the movable steel plate, and two sides of the second rib plate are respectively welded with the movable steel plate and the sliding block.
Further, the pushing mechanism comprises a jack and a reaction frame, the reaction frame is fixed on the pedestal through a bolt, the outer cylinder of the jack is fixed on the reaction frame, and the ejector rod of the jack is connected with the movable steel plate.
Further, the pedestal is equipped with four column bases, and four column bases protrusion pedestal top surface form four bosss, and four boss two liang of distribution are in the perpendicular axial both sides of a plurality of axial slots, and the both ends of fixing base are installed on two bosss along the axial.
Further, the fixing seat is fixed with the boss through welding, and the test piece steel plate is fixed with the sliding shaft through welding.
Further, still include vertical spacing subassembly, vertical spacing subassembly includes slide bar and slide rail, and the slide rail is installed in the pedestal top surface along the axial, and the bottom of slide bar is equipped with spacing slider along the axial, and spacing slider and slide rail sliding connection are equipped with the screw thread on the slide bar, and the test piece steel sheet is run through at the top of slide bar, and the test piece steel sheet passes through the nut lock solid to the slide bar.
Further, the sliding groove and the sliding shaft are formed by linear cutting, and lubricating oil is coated between the sliding groove and the sliding shaft.
The other technical scheme of the invention is as follows: according to the test method of the steel plate local buckling test device with the sliding shaft, the pushing mechanism pushes the movable steel plate to move axially, and the movable steel plate moves axially to drive the clamping steel plate to move axially so as to provide axial loading force for the test piece steel plate; providing a vertical limiting assembly, wherein a sliding rod penetrates through a test piece steel plate and is locked and fixed through a nut, and the test piece steel plate in the area is restrained from displacing outwards from the plane so as to prevent the test piece steel plate from locally buckling; providing a plurality of threaded ejector rods to provide unidirectional constraint force for the test piece steel plate, changing the magnitude of the unidirectional constraint force by adjusting the tightness of nuts on the threaded ejector rods to simulate the local buckling condition of the test piece steel plate under different unidirectional constraint forces, and enabling the spacing between the plurality of threaded ejector rods to be from large to small by adjusting the spacing between the plurality of threaded ejector rods to simulate the bulging condition of the test piece steel plate in the unconstrained direction in the loading process under unidirectional rigid constraint; and providing a non-loading edge constraint component, and rotating up and down in the sliding shaft through the sliding shaft so as to simulate the hinge boundary of the non-loading edge of the steel plate of the test piece.
Compared with the prior art, the invention has the following beneficial effects:
(1) the non-loading edge constraint assembly is provided with a sliding groove and a sliding shaft, and the sliding shaft rotates up and down in the sliding groove to simulate the hinge boundary of the non-loading edge of the steel plate of the test piece.
(2) The axial loading assembly clamps the loading edges of the test piece steel plate by the clamping steel plate, can realize the loading condition of the solid support boundary of the two loading edges of the test piece steel plate, restrains the displacement of the clamping steel plate by the axial loading assembly through the guide rail, can realize that the clamping steel plate only moves along the axial direction, and ensures the loading accuracy.
(3) The method comprises the following steps that a plurality of threaded ejector rods are provided to provide unidirectional constraint force for a test piece steel plate, the threaded ejector rods can effectively simulate the action of concrete and the steel plate, the distance between the threaded ejector rods is adjusted to be smaller than that between the threaded ejector rods, and the condition that the test piece steel plate bulges in an unconstrained direction in a loading process under unidirectional rigid constraint can be simulated; and under the condition that the pressure sensor is installed, the threaded ejector rod pushes the steel plate to simulate different unidirectional constraint forces, simulate the lateral expansion of concrete and simulate the unidirectional stressed local buckling condition of the steel plate.
(4) The steel plate local buckling test device with the sliding shaft can provide axial and lateral loading and non-loading end constraint conditions, can better simulate the steel plate stress conditions under different loading conditions and boundary conditions, can better simulate the local buckling process of a steel plate in a combined structure during loading, and provides reliable test results for theoretical research and application design.
(5) The vertical limiting assembly is provided, the sliding rod penetrates through the test piece steel plate and is locked through the nut, the sliding rod is parallel to the limiting sliding block along the axial direction of the sliding rail, a certain area of the test piece steel plate is fixed, the area of the test piece steel plate can only translate along the axial direction, the out-of-plane displacement of the test piece steel plate in the area is restrained, and the area of the test piece steel plate is prevented from local buckling.
Drawings
FIG. 1 is a schematic view of the assembly of the test apparatus of the present invention with a test piece steel plate.
FIG. 2 is a schematic structural diagram of the testing apparatus of the present invention.
FIG. 3 is a front view of the test device of the present invention.
FIG. 4 is a partial top view of the test device of the present invention.
Fig. 5 is a cross-sectional view taken along line a-a of fig. 4.
Fig. 6 is a cross-sectional view taken along line B-B of fig. 4.
Fig. 7 is a cross-sectional view taken along line C-C of fig. 4.
Fig. 8 is a cross-sectional view taken along line D-D of fig. 4.
Fig. 9 is a schematic structural view of a unidirectional restraining assembly of the present invention.
Fig. 10 is a schematic structural view of the vertical stop assembly of the present invention.
FIG. 11 is a schematic structural diagram of a non-loading edge constraint assembly of the present invention.
The device comprises a test piece steel plate 100, a pedestal 1, an axial groove 2, a column base 3, a boss 4, a threaded ejector rod 5, a pressure sensor 6, a nut 7, a movable steel plate 8, a guide rail 9, a clamping plate 10, a fixing plate 11, a first rib plate 12, a sliding block 13, a second rib plate 14, a fixing seat 15, a sliding shaft 16, a sliding groove 17, an opening 18, a jack 19, a reaction frame 20, a sliding rod 21, a sliding rail 22 and a limiting sliding block 23.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Examples
As shown in fig. 1 and fig. 2, the present embodiment provides a steel plate local buckling test apparatus with a sliding shaft, which is used for researching the local buckling performance of a test piece steel plate 100, and includes a pedestal 1, an axial loading assembly, a non-loading edge constraint assembly, a one-way constraint assembly, and a vertical limiting assembly.
As shown in fig. 2 and 3, a plurality of axial grooves 2 are axially arranged on the pedestal in a penetrating manner, the rack is provided with four column bases 3, the four column bases protrude out of the top surface of the rack to form four bosses 4, and the four bosses are distributed on two sides of the plurality of axial grooves in a vertical axial direction in a pairwise manner.
As shown in fig. 2, 5 and 9, the unidirectional constraint assembly includes a plurality of sets of threaded ejector rods 5, the number of sets of threaded ejector rods is equal to the number of axial grooves, each set of threaded ejector rods includes at least one threaded ejector rod, all the threaded ejector rods in each set of threaded ejector rods are correspondingly inserted into each axial groove, the threaded ejector rods are all sleeved with pressure sensors and nuts 6, the lower end faces of the pressure sensors are abutted to a pedestal, the upper end faces of the pressure sensors are abutted to nuts, the top ends of the threaded ejector rods are all abutted to a test piece steel plate to provide unidirectional constraint force, the pressure sensors are electrically connected with external electronic equipment, the nuts press the pressure sensors to apply a counter force to the threaded ejector rods by adjusting the tightness between the nuts and the threaded ejector rods, and the counter force is the unidirectional constraint force applied to the steel plate by.
As shown in fig. 6 and 10, the vertical limiting assembly comprises a sliding rod 21 and a sliding rail 22, the sliding rail is axially mounted on the top surface of the pedestal, a limiting sliding block 23 is axially arranged at the bottom of the sliding rod and is slidably connected with the sliding rail, threads are arranged on the sliding rod, a test piece steel plate penetrates through the top of the sliding rod, and the test piece steel plate is locked to the sliding rod through a nut. Fixing a certain area of the test piece steel plate, enabling the area of the test piece steel plate to only translate along the axial direction, restraining the out-of-plane displacement of the test piece steel plate in the area, and preventing the area of the test piece steel plate from local buckling.
As shown in fig. 2, 4 and 8, the axial loading assembly is respectively arranged at the front and back sides of the test piece steel plate in the axial direction, the axial loading assembly comprises two clamping steel plates, a movable steel plate 8, a guide rail 9 and a pushing mechanism, the two clamping steel plates jointly clamp one axial end of the test piece steel plate and are fixed through a bolt, one end of the clamping steel plate is connected with the movable steel plate, the guide rail is axially arranged on the top surface of the test pedestal, the movable steel plate is slidably connected with the guide rail, the pushing mechanism is arranged on the test pedestal and is used for pushing the movable steel plate to axially slide along the guide rail, in the embodiment, the clamping steel plate is in an L shape and comprises a clamping plate 10 and a fixed plate 11 which are mutually and vertically connected, the clamping plates of the two clamping steel plates jointly clamp one axial end of the test piece steel plate and, be equipped with first floor 12 on the centre gripping steel sheet, the both sides of first floor respectively with grip block and fixed plate welding, through setting up first floor, avoid axial loading in-process centre gripping steel sheet atress to warp. The movable steel plate extends towards the axial direction of the pushing mechanism to form a sliding block 13, the sliding block is connected with the guide rail in a sliding mode, a second rib plate 14 is arranged between the sliding block and the movable steel plate, two sides of the second rib plate are respectively welded with the movable steel plate and the sliding block, the displacement of the movable steel plate is restrained through the guide rail, the steel plate can be clamped to move only along the axial direction, and the loading accuracy is guaranteed; the pushing mechanism comprises a jack 19 and a reaction frame 20, the reaction frame is L-shaped, the reaction frame is fixed on the pedestal through a bolt, the outer cylinder of the jack is fixed on the reaction frame, and the ejector rod of the jack is connected with the movable steel plate.
As shown in fig. 6, fig. 7 and fig. 11, the perpendicular axial left and right sides of test piece steel sheet is located respectively to the limit restraint subassembly of non-loading, the limit restraint subassembly of non-loading includes fixing base 15 and sliding shaft 16, the both ends of fixing base weld on two bosss along the axial, the inside of fixing base is equipped with sliding tray 17 along the axial, trompil 18 is seted up towards test piece steel sheet direction to the sliding tray, sliding shaft embedding sliding tray in and with sliding tray sliding connection, the sliding shaft can rotate from top to bottom in the sliding tray, the perpendicular axial both ends of test piece steel sheet pass through welded fastening with the sliding shaft respectively. In this embodiment, the slide groove and the slide shaft are formed by wire cutting, and lubricating oil is applied between the slide groove and the slide shaft.
According to the test method of the steel plate local buckling test device with the sliding shaft, the pushing mechanism pushes the movable steel plate to move axially, and the movable steel plate moves axially to drive the clamping steel plate to move axially so as to provide axial loading force for the test piece steel plate; providing a vertical limiting assembly, wherein a sliding rod penetrates through a test piece steel plate and is locked and fixed through a nut, and the test piece steel plate in the area is restrained from displacing outwards from the plane so as to prevent the test piece steel plate from locally buckling; the method comprises the steps that a plurality of threaded ejector rods are provided to provide unidirectional constraint force for a test piece steel plate, the stress of a pressure sensor is checked through external electronic equipment, the unidirectional constraint force is changed by adjusting the tightness of nuts on the threaded ejector rods to simulate the local buckling condition of the test piece steel plate under different unidirectional constraint forces, and the intervals among the threaded ejector rods are adjusted from large to small to simulate the situation that the test piece steel plate bulges to an unconstrained direction in the loading process under unidirectional rigid constraint; and providing a non-loading edge constraint component, and rotating up and down in the sliding shaft through the sliding shaft so as to simulate the hinge boundary of the non-loading edge of the steel plate of the test piece.
As mentioned above, the present invention can be better realized, and the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; all equivalent changes and modifications made according to the present disclosure are intended to be covered by the scope of the claims of the present invention.
Claims (10)
1. A steel plate local buckling test device with a sliding shaft is used for researching the local buckling performance of a steel plate of a test piece and is characterized by comprising a pedestal, an axial loading assembly, a non-loading edge restraining assembly and a one-way restraining assembly;
the pedestal is provided with a plurality of axial grooves in an axial penetrating manner, the unidirectional constraint assembly comprises a plurality of groups of threaded ejector rods, the number of the threaded ejector rods is equal to the number of the axial grooves, each group of threaded ejector rods comprises at least one threaded ejector rod, all the threaded ejector rods in each group of threaded ejector rods are correspondingly inserted into each axial groove, the threaded ejector rods are sleeved with pressure sensors and nuts, the lower end faces of the pressure sensors are abutted to the pedestal, the upper end faces of the pressure sensors are abutted to the nuts, and the top ends of the threaded ejector rods are abutted to the test piece steel plate;
the axial loading assembly is respectively arranged on the front side and the rear side of the test piece steel plate in the axial direction, and comprises two clamping steel plates, a movable steel plate, a guide rail and a pushing mechanism, wherein the two clamping steel plates jointly clamp one axial end of the test piece steel plate and are fixed through bolts;
the perpendicular axial left and right sides of test piece steel sheet is located respectively to non-loading limit restraint subassembly, non-loading limit restraint subassembly includes fixing base and sliding shaft, fixing base and pedestal fixed connection, the inside of fixing base is equipped with the sliding tray along the axial, the sliding tray is the cylinder type, the trompil is seted up towards the test piece steel sheet direction to the sliding tray, in the sliding shaft embedding sliding tray and with sliding tray sliding connection, the sliding shaft can rotate from top to bottom in the sliding tray, the perpendicular axial both ends of test piece steel sheet are connected with the sliding shaft respectively.
2. The device for testing the local buckling of the steel plate with the sliding shaft as claimed in claim 1, wherein the clamping steel plate is L-shaped and comprises a clamping plate and a fixing plate which are perpendicularly connected with each other, the clamping plates of the two clamping steel plates jointly clamp one axial end of the test piece steel plate and are fixed through bolts, and the fixing plates of the two clamping steel plates are respectively fixed to the movable steel plate through bolts.
3. The device for testing the local buckling of the steel plate with the sliding shaft as claimed in claim 2, wherein a first rib plate is arranged on the clamping steel plate, and two sides of the first rib plate are respectively welded with the clamping plate and the fixing plate.
4. The device for testing the local buckling of the steel plate with the sliding shaft as claimed in claim 2, wherein the movable steel plate extends axially towards the pushing mechanism to form a sliding block, the sliding block is connected with the guide rail in a sliding manner, a second rib plate is arranged between the sliding block and the movable steel plate, and two sides of the second rib plate are respectively welded with the movable steel plate and the sliding block.
5. The device for testing the local buckling of the steel plate with the sliding shaft as claimed in claim 1, wherein the pushing mechanism comprises a jack and a reaction frame, the reaction frame is fixed on the pedestal through a bolt, an outer cylinder of the jack is fixed on the reaction frame, and a mandril of the jack is connected with the movable steel plate.
6. The device for testing the local buckling of the steel plate with the sliding shaft as claimed in claim 1, wherein the pedestal is provided with four column feet, the four column feet protrude out of the top surface of the pedestal to form four bosses, the four bosses are distributed on two sides of the plurality of axial grooves in a direction perpendicular to the axial direction, and two ends of the fixing seat are axially mounted on the two bosses.
7. The device for testing the local buckling of the steel plate with the sliding shaft as claimed in claim 6, wherein the fixing seat is fixed to the boss by welding, and the test piece steel plate is fixed to the sliding shaft by welding.
8. The steel plate local buckling test device with the sliding shaft according to claim 1, further comprising a vertical limiting assembly, wherein the vertical limiting assembly comprises a sliding rod and a sliding rail, the sliding rail is axially mounted on the top surface of the pedestal, a limiting sliding block is axially arranged at the bottom of the sliding rod, the limiting sliding block is slidably connected with the sliding rail, threads are arranged on the sliding rod, the top of the sliding rod penetrates through the test piece steel plate, and the test piece steel plate is locked to the sliding rod through a nut.
9. The device for testing the local buckling of the steel plate with the sliding shaft as claimed in claim 1, wherein the sliding groove and the sliding shaft are formed by wire cutting, and lubricating oil is coated between the sliding groove and the sliding shaft.
10. A test method of the steel plate local buckling test device with the sliding shaft as claimed in any one of claims 1 to 9, wherein the pushing mechanism pushes the movable steel plate to move axially, and the movable steel plate moves axially to drive the clamping steel plate to move axially so as to provide axial loading force for the steel plate of the test piece;
providing a plurality of threaded ejector rods to provide unidirectional constraint force for the test piece steel plate, changing the magnitude of the unidirectional constraint force by adjusting the tightness of nuts on the threaded ejector rods to simulate the local buckling condition of the test piece steel plate under different unidirectional constraint forces, and enabling the spacing between the plurality of threaded ejector rods to be from large to small by adjusting the spacing between the plurality of threaded ejector rods to simulate the bulging condition of the test piece steel plate in the unconstrained direction in the loading process under unidirectional rigid constraint;
and providing a non-loading edge constraint component, and rotating up and down in the sliding shaft through the sliding shaft so as to simulate the hinge boundary of the non-loading edge of the steel plate of the test piece.
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| CN202010898697.4A CN111948025B (en) | 2020-08-31 | 2020-08-31 | Steel plate local buckling test device with sliding shaft and test method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114544346A (en) * | 2022-02-23 | 2022-05-27 | 北京市市政二建设工程有限责任公司 | Novel bidirectional loading test device for corrugated steel structure |
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| CN102175437A (en) * | 2011-01-14 | 2011-09-07 | 天津大学 | Buckling test device for deepwater submarine conduit |
| CN107167378A (en) * | 2017-05-16 | 2017-09-15 | 华北理工大学 | Axial tension experimental rig and its test method |
| CN107782606A (en) * | 2017-10-30 | 2018-03-09 | 华侨大学 | A kind of experimental rig and its application method of the local buckling behavior of double steel plate combined concrete shear wall steel plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114544346A (en) * | 2022-02-23 | 2022-05-27 | 北京市市政二建设工程有限责任公司 | Novel bidirectional loading test device for corrugated steel structure |
| CN114544346B (en) * | 2022-02-23 | 2024-04-05 | 北京市市政二建设工程有限责任公司 | Bidirectional loading test device for corrugated steel structure |
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| CN111948025B (en) | 2024-04-26 |
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