JP2018145646A - Reinforcement structure for column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement structure of a column capable of suppressing buckling in an out-of-plane direction of a column beam frame of a reinforcement member.SOLUTION: A brace 16 as a reinforcing member for reinforcing a column 10 and suppressing bending deformation of the column 10 in an in-plane direction of a column beam frame 14 constituted of the column 10 and a beam 12 joined to the column 10 is provided in a structure plane 14A of the column beam frame 14. Both ends in the longitudinal direction of the brace 16 are joined to the column 10 and the beam 12, respectively, and are curved so as to be convex upward or downward.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a column reinforcing structure.

  As a reinforcing member that reinforces a column beam frame composed of columns and beams of a building, for example, Patent Document 1 discloses a gusset plate that extends linearly at an angle with respect to an orthogonal axis composed of a column material and a beam material. A brace material having both ends fixed to a pillar material and a beam material is disclosed. However, the cane material extending in a straight line as disclosed in Patent Document 1 has a problem that it is easily buckled by an external force applied in an out-of-plane direction in the column beam frame.

JP 2013-177797 A

  In view of the above facts, an object of the present invention is to provide a column reinforcing structure capable of suppressing buckling of the reinforcing member in the out-of-plane direction in the column beam frame.

  The column reinforcing structure according to claim 1 is provided in a structure of a column beam structure including a column, a beam joined to the column, and the column and the beam. And a reinforcing member that is curved so as to be convex upward or downward.

  According to the said structure, a pillar can be reinforced by providing the reinforcement member respectively joined to a pillar and a beam in the construction surface of the pillar beam frame comprised with a pillar and a beam. In addition, since the reinforcing member is curved so as to protrude upward or downward, the design of the reinforcing member can be improved as compared with the configuration in which the reinforcing member extends linearly, and the column beam of the reinforcing member Buckling in the out-of-plane direction in the frame can be suppressed.

  The column reinforcing structure according to claim 2 is the column reinforcing structure according to claim 1, wherein the reinforcing structure is curved so as to protrude upward, and one end surface in the longitudinal direction thereof is the column. The other end surface in the longitudinal direction is bonded to the lower surface of the beam.

  According to the above configuration, since both end surfaces in the longitudinal direction of the reinforcing member are joined to one side surface of the column and the lower surface of the beam, respectively, compared to the configuration in which the side surface of the reinforcing member is joined to the column and the beam, Bending deformation can be further suppressed. Further, since the reinforcing structure is curved so as to be convex upward, an effective space under the beam can be widened.

  The column reinforcing structure according to claim 3 is the column reinforcing structure according to claim 1 or 2, wherein the column is made of H-shaped steel, and the reinforcing member is joined to one flange of the column. In addition, a reinforcing plate is attached between the one flange and the other flange.

  According to the said structure, cost can be reduced by comprising a pillar with a H-shaped steel compared with the pillar being a circular steel pipe. In addition, since a reinforcing member is joined to one flange of the column and a reinforcing plate is attached between one flange and the other flange, the reinforcing member suppresses bending deformation of the column in the in-plane direction of the column beam frame. In addition, it is possible to suppress bending deformation of the column in the out-of-plane direction of the column beam frame by the reinforcing plate.

  ADVANTAGE OF THE INVENTION According to this invention, the buckling to the out-of-plane direction in the column beam frame of a reinforcement member can be suppressed.

It is a general view which shows the reinforcement structure of the pillar which concerns on 1st Embodiment. It is the sectional view on the AA line in FIG. It is a general view which shows the reinforcement structure of the pillar which concerns on 2nd Embodiment. (A) is the exploded view which shows the junction part of the beam and reinforcement member in FIG. 3, (B) is the BB sectional drawing.

(First embodiment)
Hereinafter, a column reinforcing structure according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

<Configuration>
As shown in FIG. 1, the pillar 10 of the first embodiment is made of, for example, H-section steel, and a plurality of (two in this embodiment) pillars 10 are erected from the floor 11. Further, a beam 12 made of, for example, H-shaped steel is bridged and joined to the upper portion of the column 10, and the column 10 and the beam 12 constitute a column beam frame 14.

  Furthermore, a cane 16 as a reinforcing member that reinforces the column 10 is provided in the surface 14A of the column beam frame 14. The cane 16 is made of, for example, H-shaped steel, and is curved so as to be convex upward. One end surface in the longitudinal direction of the cane 16 is joined to one side surface of the column 10, and the other end surface in the longitudinal direction is joined to the lower surface of the beam 12.

  Specifically, in the cane 16, the in-plane direction of the column beam frame 14 is a strong axis direction, and as shown in FIG. 2, the plate 18 in which a plurality of bolt holes 18 </ b> A are formed has one end surface in the longitudinal direction. It is welded to. A plurality of bolt holes are also formed at positions corresponding to one flange 10 </ b> A of the column 10, and the plate 18 is joined to the flange 10 </ b> A of the column 10 by the bolt 20, so that one end surface in the longitudinal direction of the cane 16 is formed. It is joined to the column 10.

  As shown in FIG. 1, the plate 22 is also welded to the other longitudinal end face of the cane 16, and the plate 22 is joined to the lower flange 12 </ b> A of the beam 12 by bolts 24. The other end surface in the longitudinal direction is joined to the beam 12.

  In addition, a plurality (two in the present embodiment) of reinforcing rib plates 26 are welded to the web 10 </ b> B of the column 10 at the joint portion between the column 10 and the cane 16. Similarly, a plurality of (two in the present embodiment) reinforcing rib plates 28 are welded to the web 12B of the beam 12 at the joint portion between the beam 12 and the cane 16.

  Furthermore, a pair of reinforcing plates 30 for reinforcement are welded between one flange 10A and the other flange 10C of the column 10. The reinforcing plate 30 is provided so as to cover the rib plate 26 from the longitudinal center portion of the column 10 to the upper portion which is a joint portion with the beam 12, and a closed cross section is formed by the flanges 10 </ b> A and 10 </ b> C and the reinforcing plate 30. Has been.

  In addition, the reinforcement plate 30 should just be attached to the upper part of the pillar 10 at least, and may be attached over the whole surface between the flanges 10A and 10C. Moreover, the some reinforcement plate 30 may be attached at intervals between flange 10A, 10C.

<Action and effect>
According to this embodiment, the cane 16 to be joined to the column 10 and the beam 12 is provided in the surface 14A of the column beam frame 14 composed of the column 10 and the beam 12. For this reason, the column 10 can be reinforced by the cane 16 and the bending deformation of the column 10 in the in-plane direction of the column beam frame 14 can be suppressed.

  Moreover, according to this embodiment, since the cane 16 is comprised by the H-section steel, cost can be reduced compared with the structure in which a cane is comprised by circular steel pipes, such as KT brace. . Here, the cane 16 generally composed of H-shaped steel has a weak axial direction, that is, the column beam frame 14 with respect to a buckling resistance against an external force applied in the strong axis direction, that is, the in-plane direction of the column beam frame 14. The buckling strength against external force applied in the out-of-plane direction is small.

  However, according to this embodiment, since the cane 16 has a curved shape, the limit load for the external force applied in the out-of-plane direction of the column beam frame 14 as compared with the configuration in which the cane is a straight shape. Becomes larger. For this reason, buckling in the out-of-plane direction in the column beam frame 14 of the cane 16 can be suppressed by making the cane 16 into a curved shape as compared with a straight cane. Moreover, since the cross-sectional area of the wand 16 can be reduced as compared with a wand having a linear shape, the material cost can be reduced.

  Furthermore, since the cane 16 is curved so as to be convex upward, the overall design of the cane 16 and the column beam frame 14 can be improved compared to a straight cane, In particular, the effective space below the beam 12 can be widened.

  Further, according to the present embodiment, both longitudinal end surfaces of the cane 16 are joined to one side surface of the column 10 and the lower surface of the beam 12. For this reason, compared to the configuration in which the side surface of the cane 16 is joined to the column 10 or the beam 12, the bending deformation of the column 10 can be further suppressed by the cane 16.

  Furthermore, according to this embodiment, the reinforcing plate 30 is welded between the flanges 10 </ b> A and 10 </ b> C of the column 10. For this reason, the bending deformation of the column 10 in the out-of-plane direction of the column beam frame 14 can be suppressed by the reinforcing plate 30.

(Second Embodiment)
Next, a column reinforcing structure according to a second embodiment of the present invention will be described with reference to FIGS. In addition, description is abbreviate | omitted suitably about the structure similar to 1st Embodiment.

<Configuration>
As shown in FIG. 3, in the second embodiment, similarly to the first embodiment, a beam 42 is stretched over and joined to the upper part of a plurality (two in this embodiment) of the pillars 40. A column beam frame 44 is configured by the beam 42.

  An arch member 46 as a reinforcing member that reinforces the column 40 is provided in the surface 44A of the column beam frame 44. The arch member 46 includes a pair of bending members 48 made of, for example, H-shaped steel, and a joint member 50 that connects the bending members 48, and is provided so as to connect adjacent columns 40.

  Specifically, the pair of bending members 48 are curved such that the in-plane direction of the column beam frame 44 is a strong axis direction, and the whole is convex upward. One end surface in the longitudinal direction of the bending material 48 is joined to one flange 40 </ b> A of the column 40 via a plate 54 by a bolt 52. As shown in FIG. 4A, a plurality of bolt holes 56 are formed in the upper flange 48A, the lower flange 48B, and the web 48C at the other longitudinal end of the bending material 48, respectively.

  The joint member 50 is made of, for example, H-shaped steel, and the in-plane direction of the column beam frame 44 is a strong axis direction, and is curved so as to be convex upward as a whole. A plurality of bolt holes 58 are formed in the upper flange 50A, the lower flange 50B, and the web 50C at both ends in the longitudinal direction of the joint member 50, respectively.

  As shown in FIGS. 4A and 4B, the other end in the longitudinal direction of the bending member 48 and the both ends in the longitudinal direction of the joint member 50 straddle the webs 48C and 50C, and the webs 48C and 50C. It is fixed by a pair of plates 60 to be sandwiched.

  Specifically, a plurality of bolt holes 60A are formed in the plate 60, and the bolts 62 are inserted into the bolt holes 56 of the bending material 48, the bolt holes 58 of the joint member 50, and the bolt holes 60A of the plate 60. Thus, the pair of bending members 48 and the joint member 50 are connected to each other via the plate 60.

  Similarly, the upper flange 48A of the bending member 48 and the upper flange 50A of the joint member 50 are fixed with bolts 66 via a pair of plates 64 that straddle the upper flanges 48A and 50A and sandwich the upper flanges 48A and 50A. Yes. The lower flange 48B of the bending member 48 and the lower flange 50B of the joint member 50 are also fixed by bolts 70 through a pair of plates 68 that straddle the lower flanges 48B and 50B and sandwich the lower flanges 48B and 50B.

  Further, a connection plate 72 is erected on the upper flange 50 </ b> A of the joint member 50, and the connection member 72 is welded to the lower flange 42 </ b> A at a substantially central portion in the longitudinal direction of the beam 42, whereby the joint member 50 is It is fixed to the beam 42.

  Further, as in the first embodiment, a pair of reinforcing plates 74 for reinforcement are welded between one flange 40A and the other flange 40C of the column 40. The reinforcing plate 74 is provided from the central portion in the longitudinal direction of the column 40 to the upper portion that is a joint portion with the beam 42, and a closed cross section is formed by the flanges 40 </ b> A and 40 </ b> C and the reinforcing plate 74.

<Action and effect>
According to the present embodiment, the arch member 46 has a curved shape, similar to the wand 16 of the first embodiment. For this reason, compared with the structure by which the bending material 48 of the arch member 46 is made into linear shape, the buckling to the out-of-plane direction in the column beam frame 14 of the arch member 46 whole can be suppressed, for example.

  Further, by using the arch member 46 as the reinforcing member, it is possible to improve the design of the entire column beam frame 44 as compared with the case where a straight cane or the like is used. The effective space can be widened.

  Furthermore, according to the present embodiment, the arch member 46 is provided so as to connect the adjacent columns 40 to each other, and a substantially central portion in the longitudinal direction of the arch member 46 is joined to the beam 42. For this reason, the external force applied to the arch member 46 can be distributed to the columns 40 and the beams 42, and a rib plate that reinforces the columns 40 and the beams 42 becomes unnecessary.

(Other embodiments)
As mentioned above, although an example of embodiment was demonstrated about this invention, this invention is not limited to this embodiment, Various other embodiment is possible within the scope of the present invention.

  For example, in the first and second embodiments, the wand 16 and the arch member 46 as the reinforcing members are curved shapes that are convex upward, but may be curved shapes that are convex downward. Even in this case, the buckling in the out-of-plane direction of the column beam frames 14 and 44 of the wand 16 and the arch member 46 can be suppressed as compared with the configuration in which the reinforcing member has a linear shape.

  Moreover, in 2nd Embodiment, although the arch member 46 was comprised by the pair of bending material 48 and the joint member 50 which connects the bending materials 48, the arch member 46 is comprised by one member of the arch shape. May be.

  Hereinafter, Example 1 and Comparative Example 1 of the present invention will be specifically described. In addition, embodiment of this invention is not limited to the Example shown below.

[Example 1]
In Example 1, an H-shaped steel wand model having a curved shape similar to the wand 16 of the first embodiment was created. Note that both end surfaces in the longitudinal direction of the cane model are pin-joined to one side face of the column and the bottom face of the beam, respectively, and the linear distance between the joining points is 3 m.

[Comparative Example 1]
In Comparative Example 1, a conventional H-shaped steel cane model extending linearly with an angle to a column and a beam was created. Note that both end surfaces in the longitudinal direction of the cane model are pin-joined to one side face of the column and the bottom face of the beam, respectively, and the linear distance between the joining points is 3 m.

<Buckling analysis>
About the cane model of Example 1 and the cane model of Comparative Example 1, the finite element analysis program MIDAS was used to compare the out-of-plane buckling limit loads in the column beam frame. The limit load at buckling of the model was approximately 2.5 times the limit load at buckling of the cane model of Comparative Example 1. From this analysis, it was confirmed that the curved cane has a larger buckling limit load against the external force applied in the out-of-plane direction of the column beam frame compared to the straight cane.

10, 40 Columns 10A, 10C, 40A, 40C Flange 12, 44 Beam 14, 44 Column beam frame 14A, 44A Construction surface 16 Staff (an example of a reinforcing member)
30, 74 Reinforcement plate 46 Arch member (an example of a reinforcement member)

Claims (3)

Pillars,
A beam joined to the column;
A reinforcing member which is provided in a construction surface of a column beam frame composed of the column and the beam, and which is joined to the column and the beam and curved so as to protrude upward or downward;
Column reinforcing structure with   The reinforcing structure is curved so as to be convex upward, one end surface in the longitudinal direction is joined to one side surface of the column, and the other end surface in the longitudinal direction is joined to the lower surface of the beam. Reinforcement structure of the described pillar.   The column is made of H-shaped steel, the reinforcing member is joined to one flange of the column, and a reinforcing plate is attached between the one flange and the other flange. Reinforcement structure for pillars as described in 1.