An assembled buckling-resistance H-shaped steel column base node

Abstract

The present invention discloses an assembled anti-buckling H-shaped steel column foot node, comprising a column foot bottom plate, a column foot stiffening rib, an H-shaped steel column, a blocking block and a plurality of anti-buckling restraint components, wherein the plurality of anti-buckling restraint components are all sleeved on the H-shaped steel column, and two adjacent anti-buckling restraint components are in contact and cooperation. The parent material of the H-shaped steel column of the present invention does not need to be opened, and the strength of the H-shaped steel column will not be weakened; by assembling the anti-buckling restraint component group, the local buckling of the H-shaped steel column foot under large deformation can be limited, thereby increasing the seismic energy dissipation capacity of the column foot node plate after yielding, and greatly improving the ductility of the node; the relative movement of the anti-buckling restraint component group in the axial direction of the H-shaped steel column is not restricted, and when the H-shaped steel column is subjected to axial force and bending moment, the anti-buckling restraint component group does not participate in the force transmission, the column foot node stiffness is not increased due to the application of the anti-buckling restraint component group, and the node connection bearing capacity requirement is not increased.

Description

Technical Field

[0001] The invention relates to the technical field of structural engineering earthquake resistance, and in particular to an assembled buckling-resistant H-shaped steel column foot node. Background Art

[0002] In steel frame structures, the majority of steel columns are rigidly connected to the foundation and are widely used. Existing research shows that H-shaped steel rigidly connected column bases are likely to produce local buckling at the flange and web of the column base under a large earthquake. The local buckling of the H-shaped steel plate will significantly reduce the bearing capacity and ductility of the column base node. Relatively speaking, the premature buckling or even fracture of the column base node under a large earthquake may cause premature damage to the structure and make it unable to continue to bear the load.

[0003] At present, for buckling-resistance steel column foot nodes or buckling-resistance steel beam-column nodes, they are mostly restrained by adding steel plates inside and outside the H-shaped steel flange plate, and high-strength bolts are often used to connect the inner and outer restraint plates with the H-shaped steel flange plate (holes are opened in the H-shaped steel flange plate parent material to allow the bolts to pass through). When the steel column foot is subjected to axial force and bending moment, the restraint plates on both sides of the H-shaped steel flange plate and the steel flange plate will participate in the force together, which will increase the stiffness of the column foot and lead to a greater demand for node bearing capacity.

[0004] Therefore, it is necessary to develop an anti-buckling H-shaped steel column base node that can achieve the goal of preventing local buckling of the H-shaped steel column base and not increasing the stiffness of the column base. Summary of the invention

[0005] The object of the present invention is to provide an assembled buckling-resistant H-shaped steel column base node to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides an assembled anti-buckling H-shaped steel column base node, comprising an H-shaped steel column base and several groups of anti-buckling constraint members, the H-shaped steel column base comprising 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 both fixed to the column base stiffening rib; the blocking block is located above the column base stiffening rib, the blocking block is fixedly connected to the flange plate of the H-shaped steel column, and the number of the blocking blocks on each side of the flange plate of the H-shaped steel column is not less than one; several groups of the anti-buckling constraint members are all sleeved on the H-shaped steel column, two adjacent anti-buckling constraint members are in contact and cooperation, and the bottom of the bottom anti-buckling constraint member is in contact and cooperation with the blocking block.

[0007] Preferably, the anti-buckling constraint component includes a U-shaped flange plate constraint plate, a U-shaped web plate constraint plate, a connecting plate, and high-strength bolts; the number of the U-shaped flange plate constraint plates is set to four, and the high-strength bolts are vertically fixedly connected to the long sides on both sides of the U-shaped flange plate constraint plate, and the U-shaped flange plate constraint plate is used to constrain the flange plate of the H-shaped steel column; the number of the U-shaped web plate constraint plates is set to two, and the U-shaped web plate constraint plate is used to constrain the web plate of the H-shaped steel column, and the short side of the U-shaped web plate constraint plate and the two ends of the connecting plate are provided with elliptical long holes, and the elliptical long holes are compatible with the high-strength bolts, and the short side of the U-shaped web plate constraint plate is fixedly matched with the long sides of the two U-shaped flange plate constraint plates by the high-strength bolts; the connecting plate and the blocking block are arranged on the same side, and the two ends of the connecting plate are fixedly matched with the long sides of the two U-shaped flange plate constraint plates by the high-strength bolts.

[0008] Preferably, a gap is provided between the anti-buckling restraint member and the H-shaped steel column.

[0009] Preferably, the high-strength bolts are friction-type high-strength bolts.

[0010] Preferably, the long side length 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.

[0011] Preferably, the width of the U-shaped groove of the U-shaped flange plate restraining plate is 2 mm greater than the thickness of the flange plate of the restrained H-shaped steel column.

[0012] Preferably, a high-strength bolt gasket is provided between the U-shaped flange plate restraining plate and the U-shaped web plate restraining plate, and the high-strength bolt gasket is sleeved on the high-strength bolt.

[0013] Preferably, the high-strength bolt comprises a high-strength bolt screw and a bolt nut threadedly sleeved on the high-strength bolt screw.

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] 1. The present invention can prevent the flange plate and web of the H-shaped steel column base from buckling locally under earthquake action. By assembling an anti-buckling restraint component group, the H-shaped steel column base can be limited from buckling locally under large deformation, thereby increasing the seismic energy dissipation capacity of the column base node plate after yielding and greatly improving the ductility of the node.

[0016] 2. The relative movement of the anti-buckling restraint member group adopted in the present invention in the axial direction of the H-shaped steel column is not restricted. When the H-shaped steel column is subjected to axial force and bending moment, the anti-buckling restraint member group does not participate in the force transmission, the stiffness of the column base node is not increased due to the application of the anti-buckling restraint member group, and the node connection bearing capacity requirement is not increased.

[0017] 3. The single set of anti-buckling restraint members adopted in the present invention are connected and assembled by friction-type high-strength bolts. The long elliptical bolt holes opened on some plates of the anti-buckling restraint members can ensure that the distance between the anti-buckling restraint members and the flange plates and web plates of the actual H-shaped steel columns during assembly meets the design requirements. The anti-buckling restraint members are assembled with the H-shaped steel columns by full bolt connection, and no holes are required on the parent material of the H-shaped steel columns, which will not weaken the strength of the H-shaped steel columns. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a side view of the overall structure of the present invention;

[0021] Figure 3 It is a top view of the overall structure of the present invention;

[0022] Figure 4 A top view of a single set of anti-buckling restraint members of the present invention;

[0023] Figure 5 An exploded view of a single set of anti-buckling restraint members of the present invention;

[0024] Figure 6 It is a structural schematic diagram of a U-shaped web restraining plate for restraining the web of an H-shaped steel column according to the present invention;

[0025] Figure 7 It is a structural schematic diagram of a U-shaped flange plate restraining plate for restraining an H-shaped steel column flange plate according to the present invention;

[0026] Figure 8 It is a structural schematic diagram of the blocking block of the present invention;

[0027] Among them, 1. Column foot bottom plate; 2. Column foot stiffening ribs; 3. H-shaped steel column; 4. U-shaped flange plate constraint plate; 5. High-strength bolt screw; 6. High-strength bolt gasket; 7. U-shaped web plate constraint plate; 8. Elliptical long hole; 9. Connecting plate; 10. Stop block; 11. Bolts and nuts. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] As attached Figure 1 -Attached Figure 3 As shown, the present invention provides an assembled anti-buckling H-shaped steel column base node, comprising an H-shaped steel column base and several groups of anti-buckling restraint members; the H-shaped steel column base is welded by a column base bottom plate 1, a column base stiffening rib 2 and an H-shaped steel column 3; the anti-buckling restraint member is mainly used to restrain the local buckling that may occur in the flange plate and the web of the H-shaped steel column 3, and the components of the anti-buckling restraint member are connected by friction-type high-strength bolts. There is no contact between the anti-buckling restraint member and the H-shaped steel column 3, and a 1mm gap is left on each side; in actual use, considering the actual constraint range required by the H-shaped steel column 3, multiple groups of anti-buckling restraint members can be selected to form an anti-buckling restraint member group for constraint, and the anti-buckling restraint member groups are not connected, but only contact each other under the action of gravity, and the bottom of the bottom anti-buckling restraint member is in contact with the spot-welded blocking block 10, and the blocking block 10 plays a limiting role.

[0031] As attached Figure 4 and attached Figure 5 As shown, the two U-shaped flange plate restraint plates on the outer side of the flange plate of the H-shaped steel column 3 are connected by a connecting plate 9, and the connection method adopts friction type high-strength bolt connection. In order to facilitate assembly and positioning, the connecting plate 9 is provided with an elliptical long hole 8; the U-shaped web plate restraint 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 restraint plate 4 on the inner side of the flange plate of the H-shaped steel column 3. In order to facilitate assembly, the longest end distance of the U-shaped web plate restraint plate 7 should be smaller than the installation distance between the inner side wall direction of the flange plate of the H-shaped steel column 3, and the distance between the outer side end distance of the short side of the U-shaped web plate restraint plate 7 and the U-shaped flange plate restraint plate 4 installed on the inner side of the flange plate of the H-shaped steel column 3 is fixed by a high-strength bolt gasket 6 of 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 restraint plate 7 is adjusted and determined by the relative position of the high-strength bolt screw 5 in the corresponding elliptical long hole.

[0032] As attached Figure 6As shown, the U-shaped web restraining plate 7 for restraining the web of the H-shaped steel column 3 of the present invention is welded by three horizontal plates, and the chamfered right angles at the connection of the three plates should be designed to avoid the arc transition section at the connection between the flange plate and the web of the H-shaped steel column 3 after assembly; the short side steel plate of the U-shaped web restraining plate 7 is provided with an elliptical long hole 8 with a width slightly larger than the diameter of the high-strength bolt screw 5, which can be used for the high-strength bolt screw 5 to adjust and position inside it, thereby ensuring that the U-shaped web restraining plate 7 and the web of the H-shaped steel column 3 are at a designed distance.

[0033] As attached Figure 7 As shown, the width of the U-shaped groove of the U-shaped flange plate constraint plate 4 for constraining the local buckling of the flange plate of the H-shaped steel column 3 of the present invention needs to be about 2 mm larger than the thickness of the flange plate of the constrained H-shaped steel column 3, and the length of the long sides on both sides of the U-shaped groove of the U-shaped flange plate constraint plate 4 should be less than half of the width of the single-sided flange plate 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 after the large hexagonal head bolt rod is truncated, and the truncated incision is planed and welded to the outer wall of the U-shaped flange plate constraint plate 4, and the two are ensured to be vertical.

[0034] As attached Figure 8 As shown, the blocking block 10 of the present invention is in the shape of a triangular prism, which can prevent the anti-buckling restraining member group from being positioned and falling off. The shape of the blocking block 10 is not limited to the triangular prism.

[0035] In summary, the present invention aims at the problem of local buckling of the flange plate and the web of the H-beam rigid column foot under the action of a large earthquake, and discloses an assembled anti-buckling H-beam column foot node. A single group of anti-buckling restraining components is formed by a U-shaped flange plate restraining plate 4 for restraining the flange plate of the H-beam column 3, a U-shaped web plate restraining plate 7 for restraining the web of the H-beam column 3, a connecting plate 9 and friction-type high-strength bolts. The single group of anti-buckling restraining components can be selected at a reasonable height according to the processing conditions. Generally speaking, the lower the height of the single group of anti-buckling restraining components on the H-beam column 3, the more groups of anti-buckling restraining components are superimposed, and the better the anti-buckling effect is in actual use. The superimposed multiple groups of anti-buckling restraining components are in contact only due to gravity, and their vertical positions are determined by the blocking block 10.

[0036] The assembled anti-buckling H-beam column base node provided by the present invention can limit the occurrence of local buckling of the H-beam column flange or web by adding an anti-buckling constraint member around the position where local buckling may occur in the H-beam column 3 near the H-beam column base and releasing the vertical degree of freedom, without increasing the original stiffness of the steel column base.

[0037] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An assembled buckling-resistance H-shaped steel column foot node, characterized in that: The invention comprises an H-shaped steel column base and a plurality of groups of anti-buckling restraint members, wherein the H-shaped steel column base comprises a column base bottom plate (1), a column base stiffening rib (2), an H-shaped steel column (3) and a blocking block (10); the column base bottom plate (1) is fixedly mounted on 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 both fixed to the column base stiffening rib (2); The blocking block (10) is located above the column foot stiffening rib (2), and the blocking block (10) is fixedly connected to the flange plate of the H-shaped steel column (3), and the number of the blocking block (10) on each side flange plate of the H-shaped steel column (3) is not less than one; a plurality of groups of anti-buckling restraint members are sleeved on the H-shaped steel column (3), two adjacent anti-buckling restraint members are in contact and cooperation, and the bottom of the bottom anti-buckling restraint member is in contact and cooperation with the blocking block (10); The anti-buckling restraint member comprises a U-shaped flange plate restraint plate (4), a U-shaped web plate restraint plate (7), a connecting plate (9), and high-strength bolts; the number of the U-shaped flange plate restraint plate (4) is set to four, and the high-strength bolts are vertically fixedly connected to the long sides of the two sides of the U-shaped flange plate restraint plate (4), and the U-shaped flange plate restraint plate (4) is used to restrain the flange plate of the H-shaped steel column (3); the number of the U-shaped web plate restraint plate (7) is set to two, and the U-shaped web plate restraint plate (7) is used to restrain the H-shaped steel column (3 ) is constrained by the web of the U-shaped web constraint plate (7), the short sides of the U-shaped web constraint plate (7) and the two ends of the connecting plate (9) are provided with elliptical long holes (8), the elliptical long holes (8) are compatible with the high-strength bolts, the short sides of the U-shaped web constraint plate (7) and the long sides of the two U-shaped flange plate constraint plates (4) are fixedly matched by the high-strength bolts; the connecting plate (9) and the blocking block (10) are arranged on the same side, and the two ends of the connecting plate (9) are fixedly matched with the long sides of the two U-shaped flange plate constraint plates (4) by the high-strength bolts.

2. The assembled buckling-resistance H-shaped steel column base node according to claim 1 is characterized in that: A gap is provided between the anti-buckling restraint member and the H-shaped steel column (3).

3. The assembled buckling-resistance H-shaped steel column base node according to claim 1, characterized in that: The high-strength bolts are friction-type high-strength bolts.

4. The assembled buckling-resistance H-shaped steel column base node according to claim 1, characterized in that: The length of the long side of the U-shaped flange plate restraining plate (4) is less than half the width of the single-side flange plate of the H-shaped steel column (3).

5. The assembled buckling-resistance H-shaped steel column base node according to claim 4, characterized in that: The width of the U-shaped groove of the U-shaped flange plate restraining plate (4) is 2 mm greater than the thickness of the flange plate of the restrained H-shaped steel column (3).

6. The assembled buckling-resistance H-shaped steel column base node according to claim 1, characterized in that: A high-strength bolt gasket (6) is provided 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.

7. The assembled buckling-resistance H-shaped steel column base node according to claim 3, characterized in that: The high-strength bolt comprises a high-strength bolt screw rod (5) and a bolt nut (11) threadedly sleeved on the high-strength bolt screw rod (5).

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