JP5785724B2 - Steel frame joint structure - Google Patents

Description

  The present invention relates to a joint structure for steel members.

  In Patent Document 1, a secondary member having a shearing protrusion at the end is inserted into an opening provided on a side surface of a main member made of a tubular body, and the periphery is fixed with a filling grout material, thereby reducing welding work. There has been proposed a steel frame joint structure with reduced manufacturing costs (see Patent Document 1).

  Further, in Patent Document 2, the steel members are abutted with each other while being connected to each other with a steel material, and then the fiber members are filled and integrated into the spaces between the steel members so that the rigidity of the joint portion is increased. And the joining structure of the steel member which construction is easy is proposed (refer patent document 2).

JP 2000-87504 A JP-A-2005-213821

  Here, it is desired to improve the workability when joining the ends of steel beams while securing the joining strength.

  An object of the present invention is to improve the workability when joining the ends of steel beams while securing the joining strength.

The invention of claim 1 is a joining structure of steel members for joining the ends of a plurality of steel beams, a fixed part formed by solidifying fiber reinforced mortar or fiber reinforced concrete, and an end of the steel beam The plate surface is in contact with the outer peripheral surface of the fixed portion, the outer peripheral portion is not fixed to the diaphragm, and protrudes from the end plate, embedded in the fixed portion, and transmits stress to the fixed portion. Stress transmission means.

  According to the first aspect of the present invention, the stress transmission means of each steel beam is embedded in the fixing portion formed by solidifying the fiber reinforced mortar or fiber reinforced concrete, and the steel beam is joined. Therefore, compared to a structure in which steel beams are directly joined together by welding or the like, construction errors when joining the ends of steel beams can be easily absorbed, and as a result, the ends of the steel beams are joined together. The workability when doing so is improved.

  In addition, stress is transmitted from the stress transmitting means protruding from the end of one steel beam to the fixed portion, and the stress transmitted to the fixed portion is transferred from the stress transmitting means protruding from the end of the other steel beam to the other It is transmitted to the end of the steel member. Thus, since stress is transmitted between the ends of the plurality of steel beams via the fixing portion and the stress transmission means, the joining strength of the ends of the plurality of steel beams is ensured.

  Moreover, since the fixing | fixed part is formed with fiber reinforced mortar or fiber reinforced concrete, the tensile strength and toughness of a fixing | fixed part improve. Therefore, compared with the case where the fixing portion is formed of other than fiber reinforced mortar or fiber reinforced concrete, the bonding strength is improved.

  Therefore, the workability at the time of joining the ends of the steel beam is improved while securing the joining strength.

According to a second aspect of the present invention, the ends of the plurality of steel beams are connected by the stress transmission means .

In the invention of claim 2, stress is transmitted between the ends of the steel beam even through the stress transmission means . Thereby, the joint strength of the edge part of a some steel beam improves. Therefore, the joint strength at the ends of the plurality of steel beams is improved.

  According to a third aspect of the present invention, there is provided a stress transmitting means protruding from an end of a steel column, embedded in the fixed portion and transmitting stress with the fixed portion, embedded in the fixed portion, and the steel beam and the steel column are joined to each other Has been.

In the invention of claim 3, a stress transmission member of a steel column is embedded in the fixing portion, and the steel column is joined. Therefore, the workability at the time of joining the ends of the steel beam and the steel column is improved while securing the joining strength.
According to a fourth aspect of the present invention, an end plate that contacts the outer peripheral surface of the fixed portion is provided at an end of the steel column, and the stress transmission means protrudes from the end plate.

  ADVANTAGE OF THE INVENTION According to this invention, the workability | operativity at the time of joining the edge parts of steel beam can be improved, ensuring joining strength.

(A) is a perspective view which shows the joining site | part of the steel beam and steel column joined by applying the joining structure of the steel member which concerns on 1st embodiment of this invention, (B) is a disassembled perspective view of (A). FIG. It is a perspective view which shows a part of joining site | part shown in FIG. (A) is the perspective view corresponding to FIG. 2 which shows a 1st modification, (B) is the top view which looked at the principal part of the web plate of (A) in the Z direction. (A) is a perspective view corresponding to FIG. 2 which shows a 2nd modification, (B) is a perspective view corresponding to FIG. 2 which shows a 3rd modification. (A) is an exploded perspective view showing a fourth modification, and (B) is a perspective view corresponding to FIG. 2 showing a fourth modification. (A) is a perspective view which shows the joining site | part of the steel beam and steel column joined by applying the joining structure of the steel member which concerns on 2nd embodiment of this invention, (B) is B- of (A). It is a longitudinal cross-sectional view along B line. It is a perspective view of the edge part of the steel member which joined the fixed muscle as an example of a stress transmission means

<First embodiment>
The joining structure of the steel member according to the first embodiment of the present invention will be described with reference to FIGS.

  In each figure, the Z direction indicates a vertical direction, the X direction is a direction orthogonal to the Z direction, and the Y direction is a direction orthogonal to the X direction and the Z direction. Note that the X direction and the Y direction are orthogonal to each other in plan view in the Z direction (vertical direction).

  Further, hereinafter, “X” or “XL, XR” is attached to the member arranged along the X direction and the member provided on the member, and the member arranged along the Y direction and “Y” or “YL, YR” is attached to the member joined to the member after the reference numeral. Further, “Z” or “ZU, ZL” is attached to members arranged along the Z direction and members provided in the component. However, when it is not necessary to distinguish between these, X, XL, XR, Y, YL, YR, Z, ZU, and ZL are omitted.

  As shown in FIG. 1 (A), an end 52 of a steel beam 50 and an end 32 of a steel column 30 constituting the structural frame of the structure 10 are nodes 110 (see FIG. 1 (B) and FIG. 2). It is joined via.

  As shown in FIGS. 1B and 2, in the present embodiment, the node 110 has a substantially cubic shape. The node 110 is formed by filling and solidifying the fiber reinforced mortar Q in a filling space formed by a mold or the like. The fiber reinforced mortar Q is a mortar material that is reinforced by combining synthetic fiber or steel fiber with mortar. In addition, instead of fiber reinforced mortar, fiber reinforced concrete reinforced by combining synthetic fiber or steel fiber with concrete may be used.

  As shown in FIG. 1, the steel beams 50XL and 50XR are arranged along the X direction, the steel beams 50YR and 50L are arranged along the Y direction, and the steel columns 30ZU and 30ZL are arranged along the Z direction (vertical direction). Has been placed. In FIG. 2, the joining of the steel beams 50XL and 50XR is shown as a representative, and the other steel beams 50YL and 50YR and the steel columns 30ZU and 30ZL are not shown.

  In the present embodiment, the steel beam 50 is an H-shaped steel having a substantially H-shaped cross section orthogonal to the axial direction (longitudinal direction), and the steel column 30 has a rectangular cross section orthogonal to the axial direction (longitudinal direction). It is said to be a steel pipe. The steel beam 50 and the steel column 30 may be a shape steel or steel material other than H-section steel or steel pipe.

  An end plate 54 made of a steel plate or the like is provided at an end 52 in the axial direction (longitudinal direction) of each steel beam 50. Similarly, an end plate 34 made of a steel plate or the like is provided at an end 32 in the axial direction (longitudinal direction) of the steel column 30. The end plates 34 and 54 are joined so that the out-of-plane direction (plate thickness direction) matches the axial direction (longitudinal direction) of each steel beam 50 and the steel column 30.

  In this embodiment, the end 52 of the steel beam 50 and the end 32 of the steel column 30 and the end plates 54 and 34 are joined by welding. However, it may be joined by a joining method other than welding, for example, bolt fastening. In the present embodiment, the end plates 34 and 54 are arranged so as to contact the outer peripheral surface of the node 110.

  A plurality of studs 60 are joined to each end plate 34, 54. Each stud 60 protrudes in the longitudinal direction of each steel beam 50 and steel column 30, and a hemispherical hump portion 62 is formed at the tip thereof. Each stud 60 is embedded and fixed in the node 110. However, arrangement | positioning, length, etc. are set so that each stud 60 may not interfere.

  The stud may be other than the structure shown in the figure. For example, a reinforcing bar stud may be used, and a mechanical fixing unit or a bump fixing unit may be provided inside the node 110. Further, the arrangement of the studs 60 shown in the figure is an example, and the arrangement is not limited to this arrangement.

"Construction process"
Next, an example of a joining process of the steel beam 50 and the steel column 30 according to the present embodiment will be described.

  First, the end plates 34 and 54 are joined to the end 52 of the steel beam 50 and the end 32 of the steel column 30, and the stud 60 is joined to the end plates 34 and 54. The steel beam 50 and the steel column 30 are arranged in a cross shape.

  A mold (not shown) is provided, and fiber reinforced mortar Q (or fiber reinforced concrete) is filled in the mold (filling space). In the present embodiment, the end plates 34 and 54 constitute part (or all) of the mold. Further, the end plates 34 and 54 may be formed with a filling hole and an air vent hole. Then, the filled fiber reinforced mortar Q is solidified to form a node 110 in which the stud 60 is embedded and fixed, and the end 52 of the steel beam 50 and the end 32 of the steel column 30 are connected to the node 110. Are joined together.

  Note that the node 110 in which the steel beam 50 and the steel column 30 are joined in advance may be manufactured at a factory outside the construction site of the structure 10 and carried to the construction site, or the steel beam 50 and the steel column 30 may be transported to the construction site. The node 110 may be manufactured in a state where is bonded. Or you may manufacture and join the node 110 in the state which assembled | attached the steel beam 50 and the steel column 30 at the time of construction.

In addition, the process mentioned above is an example and may be another process.
For example, in the case where the end plates 34 and 54 and the stud 60 are connected to each other by bolts, after the node 110 in which the stud 60 is embedded is manufactured, the end plates 34 and 54 are brought into contact with the node 110, thereby The end 52 of each steel beam 50 and the end 32 of each steel column 30 may be joined via the node 110 by bolting the stud 60 to the stud 60.

<Action and effect>
Next, the operation and effect of this embodiment will be described.

  The steel beam 50 and the stud 60 of each steel column 30 are embedded in the node 110 formed by solidifying the fiber reinforced mortar Q (or fiber reinforced concrete), whereby the end 52 and the steel frame of the steel beam 50 are embedded. The ends 32 of the pillars 30 are joined. Therefore, it is possible to easily absorb the construction error when joining the end portion 52 of the steel beam 50 and the end portion 32 of the steel column 30 as compared with a configuration in which the steel beam 50 is joined directly by welding or the like. The workability at the time of joining the end 52 of the steel and the end 32 of the steel column 30 is improved.

Further, as described above, when the node 110 is manufactured and joined in a state in which the steel beam 50 and the steel column 30 are assembled at the time of construction, the joining position and the joining angle of each steel beam 50 and each steel column 30 are finely adjusted. Thus, manufacturing errors and construction errors of each steel beam 50 and each steel column 30 can be absorbed.

  Further, for example, stress is transmitted to the node 110 from the stud 60 protruding from the end 52 (exactly, the end plate 54) of a certain steel beam 50, and the stress transmitted to the node 110 is transmitted to the other steel beam 50. It is transmitted from the stud 60 protruding from the end 52 and the end 32 of the steel column 30 to the end 52 of the other steel beam 50 and the end 32 of the steel column 30. Thus, since stress is transmitted between the end portions 52 of the plurality of steel beams 50 and the end portions 32 of the steel column 30 via the nodes 110 and the studs 60, the bonding strength is ensured.

  Note that the length and arrangement density (number) of the studs 60 may be appropriately adjusted according to the magnitude of the transmitted stress. For example, when the stress to be transmitted is large, the studs 60 may be lengthened or the arrangement density increased (the number of the studs 60 increased).

  Moreover, since the node 110 is formed of the fiber reinforced mortar Q (or fiber reinforced concrete), the tensile strength and toughness of the node 110 are improved. Therefore, compared with the structure in which the node 110 is formed of mortar or concrete that is not fiber reinforced, the bonding strength is improved.

  Therefore, workability at the time of joining the end portion 52 of the steel beam 50 and the end portion 32 of the steel column 30 is improved while securing the joining strength.

  Furthermore, in the present embodiment, end plates 54 and 34 are provided at the end 52 of the steel beam 50 and the end 32 of the steel column 30. Therefore, the stress is transmitted to the node 110 also through the end plates 34 and 54, and the stress 52 transmitted to the node 110 is transmitted through the end plates 34 and 54 to the end 52 of the steel beam 50 and the steel column 30. It is transmitted to the end 32. The end plates 34 and 54 mainly have a function of transmitting stress in the longitudinal direction (axial direction).

  In addition, although the end plates 34 and 54 are comprised so that the outer peripheral surface of the node 110 may be contacted, it is not limited to this. A configuration in which part or all of the end plates 34 and 54 are embedded in the node 110 may be employed.

<Modification>
Next, first to fourth modifications of the present embodiment will be described with reference to FIGS. In the following modifications, as in FIG. 2, the joint portion between the steel beam 50XL and the steel beam 50XL is illustrated and described as a representative, and the other steel beams 50YL and 50YR and the steel columns 30ZU and 30ZL are illustrated. The description is omitted.

  Further, in the first to third modifications (FIGS. 3 and 4) excluding the fourth modification (FIG. 5), the end plate 54 is configured to contact the outer peripheral surface of the node 110. However, it is not limited to this. Similarly to the above-described embodiment, a configuration in which part or all of the end plate 54 is embedded in the node 110 may be employed.

"First variation"
In the first modified example, as shown in FIG. 3A, a web plate 150 embedded and fixed in the node 110 is joined to the end plate 54 joined to the end 52 of the steel beam 50. The web plate 150 is arranged with the horizontal direction as the out-of-plane direction (plate thickness direction). In addition, a through hole 152 is formed in the web plate 150. Then, as shown in FIG. 3B, the fiber reinforced mortar Q enters the through hole 152 and solidifies, whereby a cotter 154 composed of the fiber reinforced mortar Q is formed.

  Therefore, stress is transmitted from the end 52 of one steel beam 50 to the node 110 through the web plate 150. Further, the stress transmitted to the node 110 is transmitted to the other steel beam 50 through the web plate 150.

  Further, as shown by an imaginary line (two-dot broken line) in FIG. 3B, a reinforcing bar 156 may be inserted through the through hole 152. By inserting the reinforcing bars 156 in this way, the stress transmission performance is improved, and as a result, the bonding strength is improved.

"Second modification"
In the second modification, as shown in FIG. 4A, a web plate 160 embedded and fixed in the node 110 is joined to the end plate 54 joined to the end 52 of each steel beam 50. The web plate 160 and a plurality of studs 162 protruding outward in the out-of-plane direction are joined.

  Therefore, stress is transmitted from the end 52 of one steel beam 50 to the node 110 through the web plate 150 having the stud 162. Further, the stress transmitted to the node 110 is transmitted to the other steel beam 50 via the web plate 160.

`` Third modification ''
In the third modification, as shown in FIG. 4B, a web plate 160 having a stud 162 is joined to the end plate 54 as in the second modification. Further, the front end of the web plate 160 is joined to a steel mandrel 170. Therefore, the end portions 52 of each steel beam 50 are connected via the web plate 160 and the mandrel portion 170.

  Therefore, since the stress is transmitted between the end portions 52 of the steel beam 50 even through the web plate 160 and the mandrel portion 170, the bonding strength is improved.

  In the first modification, the web plate 150 may be connected via the mandrel 170.

  Furthermore, it may be connected via a member other than the mandrel portion 170, or may have a configuration in which the tip portions of the web plates 150 and 160 are connected (connected).

  Moreover, the structure by which the edge part 32 of the steel column 30 was also connected may be sufficient. For example, by joining the end plate 34 of the steel column 30 to the upper end and the lower end of the web plate 160 in the figure, the end portion 52 of the steel beam 50 and the end portion 32 of the steel column 30 are also interposed through the web plate 160. The stress is transmitted between the two.

`` Fourth modification ''
In the fourth modified example, as shown in FIG. 5A, the end plate 54 (see FIG. 2 and the like) is not joined to the end portion 52 of the steel beam 50. However, the stud 60 is joined to the web 51 at the end 52 of the steel beam 50. Then, as shown in FIG. 5B, the stud 60 is buried and fixed in the node 110.

  In FIG. 5B, the end 52 of the steel beam 50 is configured to contact the outer peripheral surface of the node 110, but the present invention is not limited to this. The end portion 52 of the steel beam 50 may be embedded in the node 110.

"Other variations"
In the first to third modifications, the web plate 150 and both the web plate 160 and the stud 60 (see FIG. 2) may be joined to the end plate 54.

  Further, in the fourth modified example, the web plate 150 of the first modified example and the web plate 160 of the second modified example may be joined to the end portion 52 of the steel beam 50.

Further, the stress transmission means may be a member other than the stud 60 having the bump portion 62 and the web plate 150 in which the through hole 152 is formed. For example, it may be the fixing muscle 360 whose tip side shown in FIG. 7 is bent in an L shape. Although FIG. 7 shows an example in which the fixing muscle 360 is applied to a configuration in which the end plate 54 is not joined as in the fourth modification, the present invention is not limited to this. The fixing plate 360 may be joined to the end plate 54.
Or the protrusion and unevenness | corrugation which can transmit stress may be sufficient. In short, any member may be used as long as it is embedded and fixed in the fixed portion (node) and can transmit stress to the fixed portion.

  In the above embodiment and each modified example, as shown in FIG. 1, the end portions 52XL, 52XL, 52YR, 52YL of the four steel beams 50XL, 50XR, 50YR, 50YL and the two steel columns 30ZU, 30ZL. Although the end portions 32ZU and 32ZL are joined to the outer surfaces of the node 110, the present invention is not limited to this. For example, the structure by which 5 or more steel frame members were joined may be sufficient. Moreover, what is necessary is just a structure with which at least 2 steel beam was joined via the node (fixed part). Furthermore, the plurality of steel beams may not be arranged orthogonally.

<Second embodiment>
The steel member joining structure according to the second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the member same as 1st embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 6, the end 52XL of the steel beam 50XL and the end 52XL of the steel beam 50XR are joined via a node 110.

  A reinforcing plate 180 is provided so as to be in contact with the outer peripheral surfaces on both outer sides of the node 110 in the Z direction. That is, the reinforcing plate 180ZU and the reinforcing plate 180ZL are disposed to face each other in the Z direction with the node 110 interposed therebetween. A stud 60 that protrudes inward in the Z direction is joined to the inner surface (the surface on the node 110 side) of the reinforcing plate 180. The stud 60 is buried and fixed in the node 110.

  In the present embodiment, both end portions in the X direction of the reinforcing plate 180 are joined to the end plate 54. Therefore, in the present embodiment, the end plates 54 of the steel beam 50 are connected by the reinforcing plate 180.

  A sheet 182 is provided outside the outer peripheral surface of the node 110 where the end plate 54 and the reinforcing plate 180 are not in contact. In the present embodiment, the sheet 182 is made of carbon fiber.

  Both ends in the Z direction of the sheet 182 are joined to the reinforcing plate 180. In other words, the two reinforcing plates 180 are arranged to face each other, and the reinforcing plates 180 arranged to face each other are connected by a sheet 182 provided along the outer peripheral surface of the node 110. Therefore, the reinforcing plate 180 and the sheet 182 restrain the outer peripheral surface of the node 110. Note that the sheet 182 and the end plate 54 may be joined or may not be joined.

<Action and effect>
Next, functions and effects of the present embodiment will be described.

  The end 52 of the steel beam 50 is joined via the node 110 and the reinforcing plate 180. The steel beam 50 is also joined by the stud 60 protruding from the end plate 54 provided at the end 52 of the steel beam 50 being embedded and fixed in the node 110.

  Then, stress is transmitted from one steel beam 50 to the node 110 via the end plate 54 and the stud 60, and the stress transmitted to the node 110 causes the end plate 54 and the stud 60 of the other steel beam 50 to pass through. To the other steel beam 50. Further, since the reinforcing plate 180 is provided with the stud 60 that transmits stress, the stress is transmitted to the node 110 via the reinforcing plate 180 and the transmitted stress is transmitted to the other steel frame via the reinforcing plate 180. It is transmitted to the beam 50. Further, stress is transmitted between the end portions 52 of the steel beam 50 through the reinforcing plate 180 and the sheet 182. As a result, the bonding strength of the steel beam 50 is ensured.

  As described above, the stress transmitted from each steel beam 50 to the node 110 via the end plate 54 and the stud 60 is transmitted to the reinforcing plate 180. Therefore, since the reinforcing plate 180 receives (bears) a part of the stress transmitted from each steel beam 50 to the node 110, the stress burden on the node 110 is reduced accordingly.

  Further, by providing the stud 60 on the reinforcing plate 180, the buckling preventing effect of the reinforcing plate 180 when the compressing direction stress is applied to the reinforcing plate 180 is exhibited.

  Further, the reinforcing plate 180 and the sheet 182 restrain the outer peripheral surface of the node 110. Therefore, even if an attempt is made to deform the outer peripheral surface of the node 110 by the stress transmitted to the node 110, the deformation of the outer peripheral surface of the node 110 is suppressed by the reinforcing plate 180 and the sheet 182. Will improve.

  Therefore, compared with a structure that does not include the reinforcing plate 180 and the sheet 182, the joint strength of the steel beam 50 is improved.

  In the present embodiment, the restraining means for restraining the node 110 has a structure in which the reinforcing plates 180 arranged to face each other are connected by the sheet 182, but is not limited thereto. For example, you may connect with plates, such as steel, not a sheet | seat. Alternatively, as shown by an imaginary line (two-dot broken line) in FIG. 6B, the reinforcing plates 180 may be connected by a column member 184 embedded in the node 110. Even if the reinforcing plate 180 is connected by the support member 184, the reinforcing plate 180 has an effect of restraining the outer peripheral surface of the node 110 and suppressing the deformation of the outer peripheral surface.

  Moreover, in this embodiment, each end plate 54 was connected by the reinforcement plate 180, However, It is not limited to this. Each end plate 54 and the reinforcing plate 180 may not be connected (joined).

<Others>
In addition, this invention is not limited to the said embodiment and modification.

  For example, in the above-described embodiment and modification, the node 110 is substantially a cube, but is not limited thereto. For example, a rectangular parallelepiped may be sufficient and a cross section may be a hexagon or a circle. Alternatively, it may be spherical.

  Further, for example, a reinforcing bar may be embedded in the node 110 to be reinforced.

  Further, for example, prestress may be introduced into the node 110. At this time, prestress may be introduced between the end plates 54. Prestress may be introduced into a site other than the end plate. For example, prestress may be introduced between the reinforcing plates 180 of the second embodiment.

  Further, the above-described plurality of embodiments and the plurality of modified examples can be implemented in combination as appropriate. Moreover, it cannot be overemphasized that it can implement with a various aspect in the range which does not deviate from the summary of this invention.

30 Steel column 50 Steel beam 52 End 60 Stud
110 nodes (fixed part)
150 Web plate (stress transmission means)
160 Web plate (stress transmitting means, connecting member)
170 Mandrel (connecting means)
180 Reinforcement plate (connecting means)
360 Anchor muscle (stress transmission means)
Q Fiber reinforced mortar

Claims (4)

A steel member joining structure for joining the ends of a plurality of steel beams,
A fixed part formed by solidifying fiber reinforced mortar or fiber reinforced concrete;
An end plate that is provided at an end of the steel beam, the plate surface is in contact with the outer peripheral surface of the fixed portion, and the outer peripheral portion is not fixed to the diaphragm ;
A stress transmission means that protrudes from the end plate and is embedded in the fixed portion and transmits stress with the fixed portion;
A steel member joining structure comprising: The ends of the plurality of steel beams are connected by the stress transmission means,
The steel member joining structure according to claim 1. A stress transmission means that protrudes from the end of the steel column and is embedded in the fixed portion and transmits stress with the fixed portion is embedded in the fixed portion,
The steel beam and the steel column are joined,
The joining structure of the steel member according to claim 1 or 2. An end plate in contact with the outer peripheral surface of the fixed portion is provided at an end of the steel column, and the stress transmission means protrudes from the end plate.
The joining structure of the steel member according to claim 3.

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