CN115749131A - Assembled buckling-restrained H-shaped steel column base node - Google Patents
Assembled buckling-restrained H-shaped steel column base node Download PDFInfo
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- CN115749131A CN115749131A CN202211557349.6A CN202211557349A CN115749131A CN 115749131 A CN115749131 A CN 115749131A CN 202211557349 A CN202211557349 A CN 202211557349A CN 115749131 A CN115749131 A CN 115749131A
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Abstract
The invention discloses an assembled buckling-restrained H-shaped steel column base node which comprises a column base bottom plate, column base stiffening ribs, an H-shaped steel column, a blocking block and a plurality of groups of buckling-restrained restraining members, wherein the buckling-restrained restraining members are sleeved on the H-shaped steel column, and two adjacent buckling-restrained restraining members are in contact fit. The base material of the H-shaped steel column does not need to be provided with holes, so that the strength of the H-shaped steel column cannot be weakened; the buckling-restrained restraining component group is assembled, so that the H-shaped steel column base can be restrained from generating local buckling under large deformation, the anti-seismic energy dissipation capacity of the column base node plate after yielding is improved, and the ductility of the node is greatly improved; the relative motion of the adopted buckling-restrained component group in the axial direction of the H-shaped steel column is not limited, when the H-shaped steel column is subjected to axial force and bending moment, the buckling-restrained component group does not participate in force transmission, the rigidity of a column base node is not increased due to the application of the buckling-restrained component group, and the requirement on the connection bearing capacity of the node is not improved.
Description
Technical Field
The invention relates to the technical field of structural engineering seismic resistance, in particular to an assembled buckling-restrained H-shaped steel column base node.
Background
In the steel frame structure, the steel columns are in rigid connection with the foundation mostly, and the application is very wide. The existing research shows that the H-shaped steel rigid-connection column base is likely to generate a local buckling phenomenon at the flange plate and the web plate of the column base under the action of a large earthquake, and the local buckling of an H-shaped steel plate part can obviously reduce the bearing capacity and the ductility of a column base node. In contrast, the column base node may be prematurely buckled or even broken under the action of a large shock, which may cause the structure to be damaged in advance and not be able to continue to bear load.
At present, for a buckling-restrained steel column base node or a buckling-restrained steel beam column node, a steel plate is additionally arranged inside and outside an H-shaped steel flange plate to restrain mostly, and a high-strength bolt is adopted to connect an inside and outside restraint plate and the H-shaped steel flange plate (a hole is formed in a parent metal of the H-shaped steel flange plate to enable the bolt to pass through) mostly. When the steel column base is stressed by axial force and bending moment, the constraint plates on two sides of the H-shaped steel flange plate and the steel flange plate can participate in the stress together, so that the rigidity of the column base is increased, and the bearing capacity requirement of the node is increased.
Therefore, it is required to develop a buckling-restrained H-shaped steel column base node which can not only prevent the H-shaped steel column base from generating the local buckling phenomenon, but also can prevent the rigidity of the column base from increasing.
Disclosure of Invention
The invention aims to provide an assembled buckling-restrained H-shaped steel column foot node to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides an assembled buckling-restrained H-shaped steel column base node which comprises an H-shaped steel column base and a plurality of groups of buckling-restrained restraining components, wherein the H-shaped steel column base comprises a column base bottom plate, a column base stiffening rib, an H-shaped steel column and a blocking block; the column base bottom plate is fixedly installed at the bottom of the H-shaped steel column, the column base stiffening rib is arranged between the column base bottom plate and the H-shaped steel column, and the column base bottom plate and the H-shaped steel column are fixed with the column base stiffening rib; the blocking blocks are positioned above the column foot stiffening ribs and fixedly connected to flange plates of the H-shaped steel column, and the number of the blocking blocks on each side flange plate of the H-shaped steel column is not less than one; the buckling restrained restraining members are sleeved on the H-shaped steel column, every two adjacent buckling restrained restraining members are in contact fit, and the bottoms of the buckling restrained restraining members at the bottommost layer are in contact fit with the stop blocks.
Preferably, the buckling restrained component comprises a U-shaped flange plate restraining plate, a U-shaped web plate restraining plate, a connecting plate and a high-strength bolt; the number of the U-shaped flange plate restraining plates is four, the high-strength bolts are vertically and fixedly connected to long edges of two sides of the U-shaped flange plate restraining plates, and the U-shaped flange plate restraining plates are used for restraining flange plates of the H-shaped steel column; the number of the U-shaped web plate restraining plates is two, the U-shaped web plate restraining plates are used for restraining the web plates of the H-shaped steel column, elliptical long holes are formed in the short edges of the U-shaped web plate restraining plates and the two ends of the connecting plate, the elliptical long holes are matched with the high-strength bolts, and the short edges of the U-shaped web plate restraining plates are fixedly matched with the long edges of the two U-shaped flange plate restraining plates through the high-strength bolts; the connecting plate with block the piece and set up in same one side, the both ends of connecting plate and two the long limit of U type flange board restraint plate passes through high strength bolt fixed fit.
Preferably, a gap is formed between the buckling restrained restraining member and the H-shaped steel column.
Preferably, the high-strength bolt is a friction type high-strength bolt.
Preferably, the length of the long side of the U-shaped flange plate restraining plate is less than half of the width of the single-side flange plate of the H-shaped steel column.
Preferably, the width of the U-shaped groove of the U-shaped flange plate constraint plate is 2mm larger than the thickness of the flange plate of the H-shaped steel column to be constrained.
Preferably, the U-shaped flange plate constraint plate and the U-shaped web plate constraint plate are provided with high-strength bolt gaskets therebetween, and the high-strength bolt gaskets are sleeved on the high-strength bolts.
Preferably, the high-strength bolt comprises a high-strength bolt screw and a bolt nut sleeved on the high-strength bolt screw in a threaded manner.
Compared with the prior art, the invention discloses the following technical effects:
1. the invention can prevent the wing margin plate and the web plate of the H-shaped steel column from local buckling under the action of earthquake, and can limit the H-shaped steel column base from local buckling under large deformation by assembling the buckling-restrained constraint component group, thereby increasing the anti-seismic energy-consumption capability of the column base node plate after yielding and greatly improving the ductility of the node.
2. The buckling-restrained constraint component group adopted by the invention has no limited relative motion in the axial direction of the H-shaped steel column, when the H-shaped steel column is subjected to axial force and bending moment, the buckling-restrained constraint component group does not participate in force transmission, the rigidity of the column base node is not increased due to the application of the buckling-restrained constraint component group, and the requirement on the connection bearing capacity of the node is not improved.
3. The single group of buckling restrained components are connected and assembled through the friction type high-strength bolts, and the long oval bolt holes are formed in part of plates of the buckling restrained components, so that the space between the buckling restrained components and the flange plates and the web plates of the actual H-shaped steel column can meet the design requirements during assembly; the buckling restrained component is connected with the H-shaped steel column in a full bolt mode when being assembled, holes do not need to be formed in the base material of the H-shaped steel column, and the strength of the H-shaped steel column cannot be weakened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a side view of the overall structure of the present invention;
FIG. 3 is a top view of the overall structure of the present invention;
FIG. 4 is a top view of a single set of anti-buckling constraint members of the present invention;
FIG. 5 is an exploded view of a single set of anti-buckling constraint members of the present invention;
FIG. 6 is a schematic structural view of a U-shaped flange plate restraining plate for restraining the flange plates of the H-shaped steel columns according to the present invention;
FIG. 7 is a schematic structural view of a U-web restraining plate for restraining the web of an H-beam of the present invention;
FIG. 8 is a schematic view of a barrier according to the present invention;
wherein, 1, a column base bottom plate; 2. a column shoe stiffener; 3. h-shaped steel columns; 4. a U-shaped flange plate restraining plate; 5. a high-strength bolt screw; 6. a high-strength bolt washer; 7. the U-shaped web plate restricts the plate; 8. an elliptical long hole; 9. a connecting plate; 10. a blocking block; 11. and bolts and nuts.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-3, the invention provides an assembled buckling-restrained H-shaped steel column base node, which comprises an H-shaped steel column base and a plurality of groups of buckling-restrained restraining members; the H-shaped steel column base is formed by welding a column base bottom plate 1, column base stiffening ribs 2 and an H-shaped steel column 3; the buckling restrained component is mainly used for restraining local buckling possibly generated by flange plates and web plates of the H-shaped steel column 3, all components of the buckling restrained component are connected through friction type high-strength bolts, the buckling restrained component is not in contact with the H-shaped steel column 3, and a 1mm gap is reserved on each side; in practical application, the actual restraint range required by the H-shaped steel column 3 is considered, multiple groups of buckling-restrained restraining components can be selected to form buckling-restrained restraining component groups for restraining, the buckling-restrained restraining component groups are not connected and only contact with each other under the action of gravity, the bottom of the buckling-restrained restraining component at the bottommost layer contacts with the stop block 10 of spot welding, and the stop block 10 plays a limiting role.
As shown in fig. 4 and 5, two U-shaped flange plate restraining plates outside the flange plates of the H-shaped steel column 3 are connected by a connecting plate 9, the connecting plate is connected by friction-type high-strength bolts, and the connecting plate 9 is provided with an elliptical long hole 8 for assembling and positioning; and the U-shaped web plate restraining plate 7 on the outer side of the web plate of the H-shaped steel column 3 is connected with the friction type high-strength bolt on the U-shaped flange plate restraining plate 4 on the inner side of the flange plate of the H-shaped steel column 3. For convenience of assembly, the longest end distance of the U-shaped web plate constraint plate 7 is smaller than the installation distance between the inner side walls of the flange plates of the H-shaped steel column 3, the distance between the outer end distance of the short side of the U-shaped web plate constraint plate 7 and the distance between the U-shaped flange plate constraint plate 4 installed on the inner side of the flange plate of the H-shaped steel column 3 is found back by adopting a high-strength bolt gasket 6 with a certain thickness, and the distance between the web plate of the H-shaped steel column 3 and the long side of the U-shaped web plate constraint plate 7 is determined by adjusting the relative position of the high-strength bolt screw 5 in the corresponding oval long hole.
As shown in fig. 6, the U-shaped web restraint plate 7 for restraining the web of the H-shaped steel column 3 is formed by welding 3 horizontal plate members, and when the straight angle at the joint of the three plate members is designed, the circular arc transition section at the joint of the flange plate and the web of the H-shaped steel column 3 can be avoided after assembly; the short side steel plate of the U-shaped web plate constraint plate 7 is provided with an oval long hole 8 with the width slightly larger than the diameter of the high-strength bolt and screw 5, and the high-strength bolt and screw 5 can be adjusted and positioned in the steel plate constraint plate, so that the design distance between the U-shaped web plate constraint plate 7 and the web plate of the H-shaped steel column 3 is guaranteed.
As shown in fig. 7, the width of the U-shaped groove of the U-shaped flange plate restraining plate 4 for restraining the local buckling of the flange plate of the H-shaped steel column 3 needs to be about 2mm larger than the thickness of the flange plate of the H-shaped steel column 3 to be restrained, and the length of the long sides of the U-shaped groove of the U-shaped flange plate restraining plate 4 should be less than half of the width of the flange plate on one side of the H-shaped steel column 3 (the width needs to exclude the length of the arc segment); the high-strength bolt screw 5 is a pure screw obtained by cutting off a large hexagonal-head bolt rod, and the cut-off cut is planed to be welded with the outer side wall of the U-shaped flange plate constraint plate 4 and is perpendicular to the U-shaped flange plate constraint plate.
As shown in fig. 8, the blocking piece 10 of the present invention has a triangular prism shape, which can prevent the buckling-restrained member set from being positioned and from falling off, and the shape of the blocking piece 10 is not limited to the triangular prism shape.
In conclusion, the invention discloses an assembled buckling-restrained H-shaped steel column base node aiming at the problem that under the action of a large earthquake, the H-shaped steel rigid connection column base can be locally buckled in the flange plate and web plate regions. The buckling restrained brace is formed by a single group of buckling restrained brace members which are formed by a U-shaped flange plate restraining plate 4 restraining a flange plate of an H-shaped steel column 3, a U-shaped web plate restraining plate 7 restraining a web plate of the H-shaped steel column 3, a connecting plate 9 and a friction type high-strength bolt. The single group of buckling restrained restraining components can be selected to have reasonable height according to processing conditions, and generally, the lower the height of the single group of buckling restrained restraining components on the H-shaped steel column 3 is, the more the buckling restrained restraining components are stacked, and the better the buckling restrained effect is in actual use. The stacked sets of anti-buckling restraining members are contacted only by gravity, the vertical position of which is determined by the stop blocks 10.
According to the assembled buckling-restrained H-shaped steel column foot node provided by the invention, the buckling-restrained restraining component is additionally arranged around the position, which is possibly partially buckled, of the H-shaped steel column 3 near the H-shaped steel column foot, and the vertical direction freedom degree is released, so that the effect of limiting the local buckling of the flange plate or the web plate of the H-shaped steel column can be achieved, but the original rigidity of the steel column foot is not increased.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described 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 can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (8)
1. The assembled buckling-restrained H-shaped steel column base node is characterized by comprising an H-shaped steel column base and a plurality of groups of buckling-restrained restraining components, wherein the H-shaped steel column base comprises a base bottom plate (1), a base stiffening rib (2), an H-shaped steel column (3) and a stop block (10); the column base bottom plate (1) is fixedly installed at the bottom of the H-shaped steel column (3), the column base stiffening rib (2) is arranged between the column base bottom plate (1) and the H-shaped steel column (3), and the column base bottom plate (1) and the H-shaped steel column (3) are fixed with the column base stiffening rib (2); the blocking blocks (10) are located above the column base stiffening ribs (2), the blocking blocks (10) are fixedly connected to flange plates of the H-shaped steel columns (3), and the number of the blocking blocks (10) on each side flange plate of each H-shaped steel column (3) is not less than one; the buckling restrained components of a plurality of groups are all sleeved on the H-shaped steel column (3), every two adjacent buckling restrained components are in contact fit, and the bottoms of the buckling restrained components at the bottommost layers are in contact fit with the blocking blocks (10).
2. The assembled buckling restrained H-shaped steel column foot node according to claim 1, wherein the buckling restrained members comprise U-shaped flange plate restraining plates (4), U-shaped web restraining plates (7), connecting plates (9), high-strength bolts; the number of the U-shaped flange plate restraining plates (4) is four, the high-strength bolts are vertically and fixedly connected to long edges of two sides of each U-shaped flange plate restraining plate (4), and the U-shaped flange plate restraining plates (4) are used for restraining flange plates of the H-shaped steel columns (3); the number of the U-shaped web plate restraining plates (7) is two, the U-shaped web plate restraining plates (7) are used for restraining the web plates of the H-shaped steel column (3), the short edges of the U-shaped web plate restraining plates (7) and the two ends of the connecting plate (9) are both provided with an oval long hole (8), the oval long holes (8) are matched with the high-strength bolts, and the short edges of the U-shaped web plate restraining plates (7) are fixedly matched with the long edges of the two U-shaped flange plate restraining plates (4) through the high-strength bolts; the connecting plate (9) and the blocking block (10) are arranged on the same side, and two ends of the connecting plate (9) are fixedly matched with the long edges of the two U-shaped flange plate restraining plates (4) through the high-strength bolts.
3. The assembled buckling restrained H-section steel leg node according to claim 1, wherein a gap is provided between the buckling restrained constraint member and the H-section steel column (3).
4. The assembled buckling restrained H-shaped steel leg node of claim 2, wherein the high-strength bolts are friction-type high-strength bolts.
5. The assembled buckling restrained H-section steel column foot node according to claim 2, characterized in that the length of the long side of the U-section flange plate restraining plate (4) is less than half the width of the single-sided flange plate of the H-section steel column (3).
6. The assembled buckling restrained H-section steel column foot node according to claim 5, wherein the U-shaped channel width of the U-shaped flange plate restraining plate (4) is 2mm greater than the flange plate thickness of the H-section steel column (3) being restrained.
7. The assembled buckling restrained H-shaped steel column foot node according to claim 2, wherein a high-strength bolt gasket (6) is arranged between the U-shaped flange plate restraining plate (4) and the U-shaped web plate restraining plate (7), and the high-strength bolt gasket (6) is sleeved on the high-strength bolt.
8. The assembled buckling restrained H-shaped steel column foot node according to claim 4, wherein the high-strength bolt comprises a high-strength bolt screw (5) and a bolt nut (11) threaded on the high-strength bolt screw (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211557349.6A CN115749131A (en) | 2022-12-06 | 2022-12-06 | Assembled buckling-restrained H-shaped steel column base node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211557349.6A CN115749131A (en) | 2022-12-06 | 2022-12-06 | Assembled buckling-restrained H-shaped steel column base node |
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| Publication Number | Publication Date |
|---|---|
| CN115749131A true CN115749131A (en) | 2023-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211557349.6A Pending CN115749131A (en) | 2022-12-06 | 2022-12-06 | Assembled buckling-restrained H-shaped steel column base node |
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|---|---|
| CN (1) | CN115749131A (en) |
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2022
- 2022-12-06 CN CN202211557349.6A patent/CN115749131A/en active Pending
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