CN113607570B - Reinforced cylindrical curved plate buckling test device and method - Google Patents
Reinforced cylindrical curved plate buckling test device and method Download PDFInfo
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- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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Abstract
The invention discloses a reinforced cylindrical curved plate buckling test device which comprises a balance frame, a jack, a curved Bian Jiazai end clamp, a support frame and a curved edge fixed end clamp, wherein the support frame is arranged on the balance frame; the balance frame comprises a horizontal steel beam and two triangular counter-force supports arranged at one side of the horizontal steel beam at intervals, wherein the horizontal surfaces of the two triangular counter-force supports are respectively attached to the surface of the horizontal steel beam and are connected through bolts, and the vertical surfaces of the two triangular counter-force supports are oppositely arranged; one end of the jack is fixedly connected with a vertical surface of a triangle counter-force support, the other end of the jack is fixedly connected with a clamp at the end of the curve Bian Jiazai, a pressure sensor is clamped between the jack and the clamp at the end of the curve Bian Jiazai, and the pressure sensor is electrically connected with an instrument display; the bent edge fixed end clamp is fixedly connected with the vertical surface of the other triangle counter-force support, the supporting frame is fixedly connected with the horizontal steel beam, and the supporting frame is positioned between the bent edge loading end clamp and the bent edge fixed end clamp. The invention has simple structure and reduces the cost of the buckling test of the reinforced cylindrical curved plate.
Description
Technical Field
The invention relates to the technical field of buckling tests, in particular to a buckling test device and method for a reinforced cylindrical curved plate.
Background
The reinforced cylindrical shell has wide application in the fields of aerospace, missile, submarine, petrochemical industry, metallurgical industry and the like. The new dry gas tank belongs to a large special steel structure for storing gas fuel. The cabinet body belongs to a large thin-wall reinforced cylindrical shell, bears the functions of the gravity of the upper cabinet top, the internal gas pressure and the external wind load, and is particularly complex and significant in buckling experiment research under the combined load. Because of the limitations of high cost, long period, great difficulty and the like in adopting a prototype structure test, the development of the bending test of the reduced scale model of the large thin-wall reinforced cylindrical curved plate and the cylindrical shell with the combined load action of the shaft pressing and the side pressing is very necessary.
In the prior art, the reinforced cylindrical curved plate and cylindrical shell buckling test device and the test method under the combined action of the axial compression load and the external side compression load have less research; and the combined load buckling test device is mainly applied to marine and aerospace structures, and is fine in manufacturing and high in production cost. In order to solve the problems of verification and safety evaluation of buckling tests of a novel gas cabinet body, a reinforced cylindrical shell and a cylindrical curved plate; the gas holder is pushed to develop towards the large-scale, high-pressure and high-performance directions, so that the test and check requirements of the gas holder body structural design are met; and ensure accuracy and reliability of buckling test of the cabinet body under the combined load action of axial compression and external side pressure, and the buckling test device and the buckling test method suitable for the novel dry type gas cabinet body under the combined load action of axial compression and external side pressure are urgently needed.
Disclosure of Invention
The invention aims to provide a reinforced cylindrical curved plate buckling test device and method, which are used for solving the problems in the prior art and reducing the cost of the reinforced cylindrical curved plate buckling test.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a reinforced cylindrical curved plate buckling test device which comprises a balance frame, a jack, a curved Bian Jiazai end clamp, a support frame and a curved edge fixed end clamp, wherein the support frame is arranged on the balance frame; the balance frame comprises a horizontal steel beam and two triangular counter-force supports arranged at one side of the horizontal steel beam at intervals, wherein the horizontal planes of the two triangular counter-force supports are respectively attached to the surface of the horizontal steel beam and are connected with the surface of the horizontal steel beam through bolts, and the vertical planes of the two triangular counter-force supports are arranged oppositely; one end of the jack is fixedly connected with a vertical surface of the triangular counter-force support, the other end of the jack is fixedly connected with the clamp at the end of the curve Bian Jiazai, a pressure sensor is clamped between the jack and the clamp at the end of the curve Bian Jiazai, and the pressure sensor is electrically connected with an instrument display; the bent edge fixed end clamp is fixedly connected with the vertical surface of the other triangular counter-force support, the supporting frame is fixedly connected with the horizontal steel beam, and the supporting frame is positioned between the bent Bian Jiazai end clamp and the bent edge fixed end clamp;
the two curved edges of the reinforced cylindrical curved plate test piece are respectively welded with an arc reinforcing plate, the curved edges on the reinforced cylindrical curved plate test piece and the end parts of the longitudinal reinforcing ribs are respectively welded with the arc reinforcing plate, a curved Bian Jiazai end clamp is used for clamping one curved edge of the reinforced cylindrical curved plate test piece, a curved edge fixed end clamp is used for clamping the other curved edge of the reinforced cylindrical curved plate test piece, and two straight edges of the reinforced cylindrical curved plate test piece are respectively clamped on the supporting frame through clamping clamps.
Preferably, the vertical surface of the triangle counter-force support and the pressure sensor are respectively and fixedly connected with the jack through a connecting piece.
Preferably, the curved Bian Jiazai end clamp comprises a square steel plate, a trapezoid steel plate, a rectangular steel plate, a first arc curved plate and an arc cover plate, wherein the square steel plate and the rectangular steel plate are vertical, the trapezoid steel plate is horizontal, one end of the trapezoid steel plate is welded with the middle part of the square steel plate, the other end of the trapezoid steel plate is welded with the middle part of the rectangular steel plate, the first arc curved plate is welded on one side, far away from the trapezoid steel plate, of the rectangular steel plate, and the first arc curved plate is vertical to the rectangular steel plate; the first arc bent plate is uniformly provided with a plurality of first bolt holes, and the arc cover plate, the bent edge and the arc cover plate clamped by the bent Bian Jiazai end clamp are respectively provided with through holes corresponding to the second bolt holes one by one.
Preferably, the curved edge fixing end clamp comprises a fixing plate, a second circular arc curved plate and a circular arc cover plate, wherein the second circular arc curved plate is fixedly arranged on one side of the fixing plate, a plurality of second bolt holes are uniformly formed in the second circular arc curved plate, and through holes corresponding to the second bolt holes one by one are respectively formed in the circular arc cover plate, the curved edge and the circular arc cover plate which are clamped by the curved edge fixing end clamp.
Preferably, the supporting frame comprises four lower-layer transverse supporting rods, two lower-layer longitudinal supporting rods, eight vertical supporting rods, two upper-layer transverse supporting rods and two upper-layer longitudinal supporting rods, wherein the four lower-layer transverse supporting rods are uniformly distributed at intervals, one end of each lower-layer transverse supporting rod is welded with one lower-layer longitudinal supporting rod, and the other end of each lower-layer transverse supporting rod is welded with the other lower-layer longitudinal supporting rod; the bottom ends of the four vertical support rods are welded with one lower-layer longitudinal support rod, and the bottom ends of the other four vertical support rods are welded with the other lower-layer longitudinal support rod; the top ends of the four vertical support rods are welded with one upper layer longitudinal support rod, and the top ends of the other four vertical support rods are welded with the other upper layer longitudinal support rod; one end of the upper layer transverse supporting rod is welded with one vertical supporting rod, the other end of the upper layer transverse supporting rod is welded with the other vertical supporting rod, and the upper layer transverse supporting rod is lower than the top end of the vertical supporting rod; the length direction of the lower layer longitudinal supporting rod and the length direction of the upper layer longitudinal supporting rod are parallel to the length direction of the horizontal steel beam.
Preferably, four lower-layer transverse supporting rods, two lower-layer longitudinal supporting rods and two upper-layer transverse supporting rods are all angle steels, and eight vertical supporting rods and two upper-layer longitudinal supporting rods are all channel steels.
Preferably, four lower-layer transverse support rods are connected with the horizontal steel beam through bolts.
Preferably, the clamping fixture is a G-shaped fixture.
The invention also provides a buckling test method of the reinforced cylindrical curved plate, which comprises the steps of firstly arranging strain gauges on the inner side and the outer side of the skin of the reinforced cylindrical curved plate test piece and on stiffening ribs; then arranging a displacement meter at the axial loading end of the reinforced cylindrical curved plate test piece, and arranging a displacement meter at the middle position of the inner side of the reinforced cylindrical curved plate test piece; then, axial load is firstly applied to the reinforced cylindrical curved plate test piece by using a jack, and the applied axial force passes through the centroid of the axial cross section of the reinforced cylindrical curved plate test piece; and then applying side pressure load to the outer side of the upper part of the reinforced cylindrical curved plate test piece by utilizing the iron sand bag.
Compared with the prior art, the invention has the following technical effects:
the bending test device and method for the reinforced cylindrical curved plate have the advantages of simple structure and low cost, and the cost of the bending test of the reinforced cylindrical curved plate is reduced. According to the reinforced cylindrical curved plate buckling test device and method, the central angle of the reinforced cylindrical curved plate test piece is 120 degrees, and the typical test piece can embody typical characteristics of a reinforced cylindrical shell structure and save materials. The clamp for the curved edge and the straight edge of the reinforced cylindrical curved plate test piece is simple and convenient to design, simple and feasible to operate and compact and reliable in clamping. Considering the boundary effect of a curved edge and a straight edge of a typical test piece, the curved edge of the test piece is provided with a transition section, and the straight edge of the test piece is provided with proper reinforcing battens, so that buckling instability of the test piece is ensured to occur in an examination area in the middle of the test piece first. The reinforced cylindrical curved plate buckling test device under the combined action of the axial compression and the lateral compression does not need to bear or transfer load by means of a bearing wall and a bearing ground, and belongs to a self-balancing device. The coupling action of the combined load of the axial compression and the lateral compression of the typical test piece is decoupled and simplified into the action of firstly applying the axial compression and then applying the lateral compression.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a reinforced cylindrical curved plate buckling test apparatus according to the present invention;
FIG. 2 is a schematic structural view of a reinforced cylindrical curved plate test piece in the reinforced cylindrical curved plate buckling test device of the invention;
FIG. 3 is a schematic structural view of a balance frame in the reinforced cylindrical curved plate buckling test device of the invention;
FIG. 4 is a schematic structural view of a support frame in the reinforced cylindrical curved plate buckling test apparatus of the present invention;
FIG. 5 is a schematic structural view of a bent edge fixing end clamp in the reinforced cylindrical bent plate buckling test device;
FIG. 6 is a schematic structural view of a clamp at the end Bian Jiazai of the reinforced cylindrical curved plate buckling test apparatus according to the present invention;
FIG. 7 is a schematic structural view of a circular arc cover plate in the reinforced cylindrical curved plate buckling test device of the invention;
FIG. 8 is a schematic structural view of a clamping fixture in the reinforced cylindrical curved plate buckling test apparatus of the present invention;
wherein: 100. the buckling test device for the reinforced cylindrical curved plate; 2. a first triangular counter-force strut; 3. a second triangular counter-force strut; 4. a first connector; 5. a jack; 6. a second connector; 8. a curved edge loading end clamp; 81. square steel plate; 82. a trapezoidal steel plate; 83. a rectangular steel plate; 84. a first arc curved plate; 9. a support frame; 901. a lower layer transverse support rod; 902. a lower layer longitudinal support rod; 903. a vertical support rod; 904. an upper layer longitudinal support rod; 905. an upper layer transverse support rod; 10. a curved edge fixed end clamp; 101. a second arc curved plate; 102. a fixing plate; 11. a displacement meter; 12. a reinforced cylindrical curved plate test piece; 121. circular arc reinforcing plate; 122. reinforcing the battens; 13. a balance frame; 14. a circular arc cover plate; 15. clamping a clamp; 16. and (3) a screw.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by a person skilled in the art based on the embodiments of the invention without any inventive effort, are intended to fall within the scope of the invention.
The invention aims to provide a reinforced cylindrical curved plate buckling test device and method, which are used for solving the problems in the prior art and reducing the cost of the reinforced cylindrical curved plate buckling test.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 to 8: the embodiment provides a reinforced cylindrical curved plate buckling test device 100, which comprises a balance frame 13, a jack 5, a curved Bian Jiazai end clamp 8, a support frame 9 and a curved side fixed end clamp 10.
Wherein, balance frame 13 includes horizontal girder steel and interval setting two triangle-shaped counter-force props in horizontal girder steel one side, and the horizontal plane of two triangle-shaped counter-force props is laminated and is passed through bolted connection with the surface of horizontal girder steel respectively, and the vertical face of two triangle-shaped counter-force props sets up relatively. The right-hand member of jack 5 links firmly through the vertical face of first connecting piece 4 and second triangle-shaped counter-force brace 3, and the left end of jack 5 is connected with second connecting piece 6, and in this embodiment, second connecting piece 6 is connected with bent Bian Jiazai end anchor clamps 8 through four parallel screw rods 16, presss from both sides between jack 5 and bent Bian Jiazai end anchor clamps 8 and is equipped with pressure sensor, and pressure sensor is connected with instrument display electricity, and pressure sensor can transmit and measure the axial pressure that the jack applyed. The bent edge fixed end clamp 10 is fixedly connected with the vertical surface of the first triangle counter-force support 2, the supporting frame 9 is fixedly connected with the horizontal steel beam, and the supporting frame 9 is positioned between the bent edge loading end clamp 8 and the bent edge fixed end clamp 10.
The two straight edges of the reinforced cylindrical curved plate test piece 12 are respectively clamped on the supporting frame 9 through clamping clamps 15, and the clamping clamps 15 are G-shaped clamps.
The curved edge loading end clamp 8 comprises a square steel plate 81, a trapezoid steel plate 82, a rectangular steel plate 83, a first arc curved plate 84 and an arc cover plate 14, wherein the square steel plate 81 and the rectangular steel plate 83 are vertical, the trapezoid steel plate 82 is horizontal, one end of the trapezoid steel plate 82 is welded with the middle part of the square steel plate 81, the other end of the trapezoid steel plate 82 is welded with the middle part of the rectangular steel plate 83, the first arc curved plate 84 is welded on one side, far away from the trapezoid steel plate 82, of the rectangular steel plate 83, and the first arc curved plate 84 is vertical to the rectangular steel plate 83; a plurality of first bolt holes are uniformly provided on the first circular arc curved plate 84.
The curved edge fixed end clamp 10 comprises a fixed plate 102, a second arc curved plate 101 and an arc cover plate 14, wherein the second arc curved plate 101 is fixedly arranged on one side of the fixed plate 102, and a plurality of second bolt holes are uniformly formed in the second arc curved plate 101.
The supporting frame 9 comprises four lower-layer transverse supporting rods 901, two lower-layer longitudinal supporting rods 902, eight vertical supporting rods 903, two upper-layer transverse supporting rods 905 and two upper-layer longitudinal supporting rods 904, wherein the four lower-layer transverse supporting rods 901 are uniformly distributed at intervals, one end of each lower-layer transverse supporting rod 901 is welded with one lower-layer longitudinal supporting rod 902, and the other end of each lower-layer transverse supporting rod 901 is welded with the other lower-layer longitudinal supporting rod 902; the bottom ends of the four vertical support rods 903 are welded with one lower-layer longitudinal support rod 902, and the bottom ends of the other four vertical support rods 903 are welded with the other lower-layer longitudinal support rod 902; the top ends of the four vertical support rods 903 are welded with one upper layer vertical support rod 904, and the top ends of the other four vertical support rods 903 are welded with the other upper layer vertical support rod 904; one end of the upper layer transverse support rod 905 is welded with one vertical support rod 903, the other end is welded with the other vertical support rod 903, and the upper layer transverse support rod 905 is lower than the top end of the vertical support rod 903; the length direction of the lower layer longitudinal support bars 902 and the upper layer longitudinal support bars 904 is parallel to the length direction of the horizontal steel beams.
The four lower-layer transverse supporting rods 901, the two lower-layer longitudinal supporting rods 902 and the two upper-layer transverse supporting rods 905 are all angle steels, and the eight vertical supporting rods 903 and the two upper-layer longitudinal supporting rods 904 are all channel steels. The four lower-layer transverse supporting rods 901 are connected with the horizontal steel beams through bolts.
It should be noted that, the two upper-layer longitudinal support rods 904 are installed at a certain inclination angle, so that the bottom surface of the straight-edge portion of the reinforced cylindrical curved plate test piece 12 can be attached to the support surface of the upper-layer longitudinal support rod 904. The two curved edges of the reinforced cylindrical curved plate test piece 12 are respectively welded with an arc-shaped reinforcing plate 121, and the curved edges of the reinforced cylindrical curved plate test piece 12 and the end parts of the longitudinal reinforcing ribs are respectively welded with the arc-shaped reinforcing plates; the curved edge clamped by the curved edge fixed end clamp 10, the circular arc reinforcing plate 121 clamped by the curved edge fixed end clamp 10 and the circular arc cover plate 14 in the curved edge fixed end clamp 10 are respectively provided with through holes corresponding to a plurality of second bolt holes one by one, the curved edge clamped by the curved edge Bian Jiazai end clamp 8, the circular arc reinforcing plate 121 clamped by the curved edge Bian Jiazai end clamp 8 and the circular arc cover plate 14 in the curved edge loading end clamp 8 are respectively provided with through holes corresponding to a plurality of first bolt holes one by one, the circular arc cover plate 14 and the first circular arc bending plate 84 or the second circular arc bending plate 101 clamp the circular arc reinforcing plate 121 and the curved edge through bolts, the circular arc reinforcing plate 121 can be arranged to reinforce the structural stability of the thinner curved edge of the reinforced cylindrical bending plate test piece 12, on the one hand, and on the other hand, the circular arc reinforcing plate 121 and the end part of the longitudinal reinforcing rib on the reinforced cylindrical bending plate test piece 12 are welded, so that the axial load transmission is facilitated, the reinforced cylindrical bending test piece 12 is ensured to be in the middle examination area firstly, and the reinforced cylindrical bending test piece 12 is required to be arranged on the outer side of the reinforced cylindrical test piece 12, and the reinforced bar is arranged on the outer side of the circular arc reinforcing plate is arranged on the side of the reinforced cylindrical test piece 12; the reinforced strip 122 is respectively arranged on the two straight edges of the reinforced cylindrical curved plate test piece 12, so that buckling instability of the reinforced cylindrical curved plate test piece 12 can be further ensured to occur in the test piece middle checking area first.
The invention also provides a buckling test method of the reinforced cylindrical curved plate, which comprises the steps of firstly arranging strain gauges on the inner side and the outer side of the skin of the reinforced cylindrical curved plate test piece 12 and on stiffening ribs; then, arranging a displacement meter 11 at the axial loading end of the reinforced cylindrical curved plate test piece 12, and arranging the displacement meter at the middle position of the inner side of the reinforced cylindrical curved plate test piece 12; then, the jack 5 is used for applying axial load to the reinforced cylindrical curved plate test piece 12, the jack 5 is also connected with a hydraulic loading device, and hydraulic pressure is added into the jack 5 through the hydraulic loading device so as to apply axial load to the reinforced cylindrical curved plate test piece 12; the applied axial force passes through the centroid of the axial cross section of the ribbed cylindrical curved plate test piece 12; then, applying side pressure load to the outer side of the upper part of the reinforced cylindrical curved plate test piece 12 by using an iron sand bag; the buckling test values of the reinforced cylindrical curved plate test piece 12 are obtained by recording the data of each displacement meter, strain gauge and pressure sensor.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "left", "right", "horizontal", "vertical", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (7)
1. The utility model provides a add muscle cylinder bent plate buckling test device which characterized in that: the device comprises a balance frame, a jack, a bent Bian Jiazai end clamp, a support frame and a bent side fixed end clamp; the balance frame comprises a horizontal steel beam and two triangular counter-force supports arranged at one side of the horizontal steel beam at intervals, wherein the horizontal planes of the two triangular counter-force supports are respectively attached to the surface of the horizontal steel beam and are connected with the surface of the horizontal steel beam through bolts, and the vertical planes of the two triangular counter-force supports are arranged oppositely; one end of the jack is fixedly connected with a vertical surface of the triangular counter-force support, the other end of the jack is fixedly connected with the clamp at the end of the curve Bian Jiazai, a pressure sensor is clamped between the jack and the clamp at the end of the curve Bian Jiazai, and the pressure sensor is electrically connected with an instrument display; the bent edge fixed end clamp is fixedly connected with the vertical surface of the other triangular counter-force support, the supporting frame is fixedly connected with the horizontal steel beam, and the supporting frame is positioned between the bent Bian Jiazai end clamp and the bent edge fixed end clamp;
the two curved edges of the reinforced cylindrical curved plate test piece are respectively welded with an arc-shaped reinforcing plate, the curved edges on the reinforced cylindrical curved plate test piece and the end parts of the longitudinal reinforcing ribs are respectively welded with the arc-shaped reinforcing plate, a curved Bian Jiazai end clamp is used for clamping one curved edge of the reinforced cylindrical curved plate test piece, a curved edge fixed end clamp is used for clamping the other curved edge of the reinforced cylindrical curved plate test piece, and two straight edges of the reinforced cylindrical curved plate test piece are respectively clamped on the supporting frame through clamping clamps;
the bent Bian Jiazai end clamp comprises a square steel plate, a trapezoid steel plate, a rectangular steel plate, a first arc bent plate and an arc cover plate, wherein the square steel plate and the rectangular steel plate are vertical, the trapezoid steel plate is horizontal, one end of the trapezoid steel plate is welded with the middle part of the square steel plate, the other end of the trapezoid steel plate is welded with the middle part of the rectangular steel plate, the first arc bent plate is welded on one side, far away from the trapezoid steel plate, of the rectangular steel plate, and the first arc bent plate is vertical to the rectangular steel plate; a plurality of first bolt holes are uniformly formed in the first arc-shaped curved plate, and through holes which are in one-to-one correspondence with the plurality of first bolt holes are respectively formed in the arc-shaped reinforcing plate, the curved edge and the arc-shaped cover plate which are clamped by the curved Bian Jiazai end clamp;
the bent limit stiff end anchor clamps include fixed plate, second circular arc bent plate and circular arc apron, the second circular arc bent plate sets firmly one side of fixed plate, evenly be provided with a plurality of second bolt holes on the second circular arc bent plate, by bent limit stiff end anchor clamps press from both sides tight circular arc reinforcing plate bent limit and circular arc apron are last be provided with respectively with a plurality of second bolt hole one-to-one's through-hole.
2. The reinforced cylindrical curved plate buckling test apparatus of claim 1, wherein: the vertical surface of the triangle counter-force support and the pressure sensor are respectively and fixedly connected with the jack through a connecting piece.
3. The reinforced cylindrical curved plate buckling test apparatus of claim 1, wherein: the support frame comprises four lower-layer transverse support rods, two lower-layer longitudinal support rods, eight vertical support rods, two upper-layer transverse support rods and two upper-layer longitudinal support rods, wherein the four lower-layer transverse support rods are uniformly distributed at intervals, one end of each lower-layer transverse support rod is welded with one lower-layer longitudinal support rod, and the other end of each lower-layer transverse support rod is welded with the other lower-layer longitudinal support rod; the bottom ends of the four vertical support rods are welded with one lower-layer longitudinal support rod, and the bottom ends of the other four vertical support rods are welded with the other lower-layer longitudinal support rod; the top ends of the four vertical support rods are welded with one upper layer longitudinal support rod, and the top ends of the other four vertical support rods are welded with the other upper layer longitudinal support rod; one end of the upper layer transverse supporting rod is welded with one vertical supporting rod, the other end of the upper layer transverse supporting rod is welded with the other vertical supporting rod, and the upper layer transverse supporting rod is lower than the top end of the vertical supporting rod; the length direction of the lower layer longitudinal supporting rod and the length direction of the upper layer longitudinal supporting rod are parallel to the length direction of the horizontal steel beam.
4. A reinforced cylindrical curved plate buckling test apparatus according to claim 3, wherein: four lower floor's horizontal bracing piece, two lower floor's longitudinal support pole and two upper strata horizontal bracing piece are the angle steel, eight vertical support pole and two upper strata longitudinal support pole are the channel-section steel.
5. A reinforced cylindrical curved plate buckling test apparatus according to claim 3, wherein: four lower floor's horizontal bracing piece pass through the bolt with horizontal girder steel is connected.
6. The reinforced cylindrical curved plate buckling test apparatus of claim 1, wherein: the clamping fixture is a G-shaped fixture.
7. A buckling test method of a reinforced cylindrical curved plate is characterized by comprising the following steps of: based on the buckling test device of the reinforced cylindrical curved plate of any one of claims 1-6, strain gauges are firstly arranged on the inner side and the outer side of the skin of the reinforced cylindrical curved plate test piece and on stiffening ribs; then arranging a displacement meter at the axial loading end of the reinforced cylindrical curved plate test piece, and arranging a displacement meter at the middle position of the inner side of the reinforced cylindrical curved plate test piece; then, axial load is firstly applied to the reinforced cylindrical curved plate test piece by using a jack, and the applied axial force passes through the centroid of the axial cross section of the reinforced cylindrical curved plate test piece; and then applying side pressure load to the outer side of the upper part of the reinforced cylindrical curved plate test piece by utilizing the iron sand bag.
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| CN111948024A (en) * | 2020-08-31 | 2020-11-17 | 华南理工大学 | Steel plate local buckling test device with vertical limiting function and test method thereof |
| CN213749323U (en) * | 2020-09-27 | 2021-07-20 | 辽宁科技大学 | Steel pipe concrete presses-twists experimental loading device |
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