JP5969774B2 - Column and beam joint structure - Google Patents

Description

  The present invention relates to a column-to-beam joint structure for joining beams having different heights to a steel pipe column.

  Conventionally, in a structure using a steel pipe column, a beam made of H-shaped steel may be joined. When joining a column and a beam, a through diaphragm corresponding to the height of the flange portion of the beam is provided in order to efficiently transmit stress from the beam to the column at the junction. The through diaphragm is a plate-like member joined between the pillars by welding or the like. Usually, the flange portion of the beam is welded against the side of the through diaphragm.

  However, the size (height) of the beam joined to the column may not be the same in all directions. For example, a beam having a low height may be joined only in one direction. In such a case, at least one of the upper and lower flange portions of the beam cannot be joined to the through diaphragm to which the other beam is joined.

  Therefore, in order to join such beams having different heights, it is necessary to join an inner diaphragm inside the column.

  Moreover, as a column beam connection structure for joining such beams having different heights, a square cross-section tube, a cross plate supporting two parallel sides of the square cross-section tube, and a corner portion of the square cross-section tube are provided. The ends of the beam-to-column fittings, which are integrally formed by casting with the diagonal plates that support the two sides sandwiched, and at least the beam mounting range on the outer peripheral surface is formed flat, are welded to a column made of a square section tube. There is a beam-to-column connection structure in which a beam made of H-shaped steel is bonded to the outer peripheral surface of the beam-to-column metal fitting by non-scallop welding (Patent Document 1).

JP 2001-329613 A

  However, the work of providing the inner diaphragm inside the column has a problem that the welding amount is large and workability is poor. Further, in the structure described in Patent Document 1, it is necessary to integrally form the beam-column joint, which increases the mass of the hardware and increases the cost.

  The present invention has been made in view of such problems, and in the case where beams having different heights are joined to a column, a column beam having a special structure can be used without joining a member such as a diaphragm inside the column. It is an object of the present invention to provide a joint structure between a column and a beam that can be operated only with the outside of the column with a simple structure without using a joint metal.

In order to achieve the above-described object, the present invention is a structure for joining a column and a beam, and includes a pair of diaphragms formed on the columns, and a first beam in which each flange portion is joined to the upper and lower diaphragms. And a second beam having a height different from that of the first beam and joined to the column in a direction different from that of the first beam, and provided on an outer surface of the column, and from the outer surface of the column A main body having substantially the same thickness as the protrusion of the diaphragm, and having a width approximately the same as that of the diaphragm, and at least one end of the main body having the same width as the protrusion; A joining member having a convex part formed in the thickness direction, one flange part of the second beam is joined to one diaphragm, and the main body part and the convex part of the joining member are The column and the other diaphragm The other flange portion of the second beam is joined to the joining member, and stress is transmitted between the other flange portion of the second beam and the other diaphragm via the joining member. It is a joint structure of columns and beams characterized by

  The convex portion is formed at one end of the joining member, the second beam is joined eccentrically in the width direction with respect to the column, and the convex portion is joined to the second beam. The surface of the column may be a surface perpendicular to the column and may be joined to the column and the other diaphragm in the eccentric direction of the second beam.

  The convex portions are formed at both ends of the joining member, and the convex portions on both sides are joined to the pillar and the other diaphragm in a direction perpendicular to the surface of the pillar to which the second beam is joined. May be.

  As for the length of the convex part, it is desirable that it is 1/2 or less of the width of the pillar.

  The column has a substantially rectangular cross-sectional outer shape, a corner portion is formed by a curved surface portion, and an inner surface shape of the convex portion has a concave curved surface portion substantially corresponding to a shape of the curved surface portion. It is desirable that the radius of curvature is smaller than the radius of curvature of the curved surface portion.

  According to the present invention, since the joint between the column and the beam is performed by the beam joining member provided outside the column, the work can be performed only outside the column. Therefore, the workability of joining the beam to the column is excellent. In particular, the main body portion of the beam joining member has substantially the same thickness as the protruding amount of the diaphragm from the column, and the protruding portion has substantially the same width as the protruding amount, so that it can be easily joined to the diaphragm. . Moreover, since the height of the main body can be appropriately set according to the distance between the flange portion of the beam and the diaphragm, it can be easily applied even when the distance between the flange portion and the diaphragm is short.

  Further, when the beam is decentered with respect to the column and joined, the convex portion may be formed only at one end portion with respect to the main body portion. By doing in this way, the stress from a beam can be reliably transmitted to a column with a simple structure. Further, by forming the convex portions at both ends, the stress from the beam can be reliably transmitted to the column even when the beam is joined near the center in the width direction of the column.

  Moreover, if the length of a convex part is 1/2 or less of the width | variety of a pillar, even if it arrange | positions a beam joining member to the side surface which a pillar opposes, a mutual convex part does not interfere. Further, by making the curvature radius of the concave curved surface portion of the inner surface of the convex portion smaller than the curvature radius of the curved surface portion of the corner portion of the column, no gap is formed between the tip portion of the convex portion and the column. .

  According to the present invention, when a beam having a different height is joined to a column, a simple structure can be obtained without joining a member such as a diaphragm inside the column, and without using a specially-structured column beam joint hardware. Therefore, it is possible to provide a joint structure between a column and a beam that can be operated only outside the column.

The perspective view which shows the junction structure 1 of a column and a beam. It is a figure which shows the beam joining member 13, (a) is a perspective view, (b) is a top view. FIG. 2 is an elevation view showing a column-to-beam joint structure 1, where (a) is a cross-sectional view taken along the line AA in FIG. FIG. 3 is an elevation view showing a column-beam joint structure 1, which is a cross-sectional view taken along line CC of FIG. It is a figure which shows the beam joining member 13a, (a) is a perspective view, (b) is a top view. FIG. 3 is a cross-sectional view of a column / beam junction structure 1a in a state where the beam junction member 13a is used.

  Hereinafter, a column-to-beam joint structure 1 according to an embodiment of the present invention will be described. FIG. 1 is a perspective view showing a pillar-to-beam joint structure 1. The pillar-to-beam joint structure 1 is a structure in which a plurality of beams 9 a and 9 b are joined to a pillar 5.

  The column 5 is a hollow rectangular steel tube column, and the beams 9a and 9b are H-shaped steel. The beam 9a and the beam 9b have different beam heights. 1 shows an example in which the beam 9a is formed in one direction of the column 5 and the beam 9b is formed in one direction adjacent thereto, but the present invention is not limited to this, and a plurality of beams 9b are formed. It may be provided in the direction.

  A pair of diaphragms 3 a and 3 b are joined to the column 5. The diaphragms 3 a and 3 b are through-diaphragms that protrude outward from the column 5. The diaphragms 3a and 3b are provided above and below the pillar 5 with a predetermined interval.

  The ends of the upper and lower flange portions of the beam 9a are joined to the diaphragms 3a and 3b by welding, respectively. That is, the installation interval of the diaphragms 3a and 3b coincides with the flange portion interval of the beam 9a. Therefore, the stress from the beam 9a can be reliably transmitted to the column.

  The end of the flange portion 11a above the beam 9b is joined to the upper diaphragm 3a by welding. Since the beam 9b is lower than the beam 9a, a gap is generated between the flange portion 11b below the beam 9b and the diaphragm 3b.

  A beam joining member 13 is joined between the diaphragm 3b and the flange portion 11b of the beam 9b. That is, the flange portion 11b of the beam 9b, the diaphragm 3b, and the column 5 are joined via the beam joining member 13. Therefore, the stress from the beam 9b can be reliably transmitted to the column.

  2A and 2B are views showing the beam joining member 13, in which FIG. 2A is a perspective view and FIG. 2B is a plan view. The beam joining member 13 includes a main body portion 15 that is a substantially rectangular parallelepiped and a convex portion 17. The beam joining member 13 is a steel material having excellent weldability, for example. In addition, in the figure, although the main-body part 15 is shown by a rectangular parallelepiped, you may form the notch shape for avoiding a groove | channel and a welding surplus with respect to the welding part mentioned later.

  At both ends in the width direction of the main body 15 (the left-right direction in FIG. 2B), the direction perpendicular to the width direction (the vertical direction in FIG. 2A) (the vertical direction in FIG. 2A) ( A pair of convex portions 17 projecting on one side (in the thickness direction) are provided. A concave curved surface portion 16 having an arc shape is formed on the inner surface side of the convex portion 17 and in the vicinity of the base portion of the convex portion 17.

  3A is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3B is a cross-sectional view taken along the line BB in FIG. As shown in FIG. 3A, the beam joining member 13 is welded at the welded portion 19 with the side surface contacting the tip of the flange portion 11b of the beam 9b. Further, in the beam joining member 13, the upper part of the convex part 17 and the upper part of the main body part 15 are joined to the column 5 by the welding part 19. Furthermore, the lower part of the convex part 17 and the lower part of the main-body part 15 of the beam joining member 13 are welded by the diaphragm 3b and the welding part 19. FIG.

  In addition, as shown to Fig.3 (a), the notch part is previously formed in the beam 9b corresponding to the site | part to which the beam joining member 13 is joined. For this reason, the beam joining member 13 and the beam 9b do not interfere with each other. Further, as shown in FIG. 3B, the full width of the beam joining member 13 substantially matches the full width of the diaphragm 3b.

  FIG. 4 is a cross-sectional view taken along the line CC of FIG. The thickness T (FIG. 2B) of the main body portion 15 of the beam joining member 13 substantially coincides with the protrusion margin of the diaphragm 3 b with respect to the column 5. Further, the width W (FIG. 2B) of the convex portion 17 substantially coincides with the protrusion margin of the diaphragm 3 b with respect to the column 5. Therefore, when the beam joining member 13 is disposed on the diaphragm 3b, the outer surfaces of the main body portion 15 and the convex portion 17 do not protrude from the diaphragm 3b. Therefore, welding or the like is easy. In each welded portion, a backing metal (not shown) is used as necessary.

  The concave curved surface portion 16 on the inner surface of the convex portion 17 is disposed along the curved surface portion 7. Here, the concave curved surface portion 16 on the inner surface side of the convex portion 17 has a shape corresponding to the curved surface portion 7, and its curvature radius R 1 (FIG. 2B) is a curvature radius R 2 ( It is set slightly smaller than FIG. This is because when R1 is larger than R2, the tip end portion of the convex portion 17 and the inner surface of the main body portion 15 do not come into contact with the column 5.

  A slight gap may be formed between the concave curved surface portion 16 and the curved surface portion 7. Moreover, in order to show the appropriate welding allowance with the pillar 5 and the beam 9b, you may form the taper part etc. which show a welding part in the main-body part 15 and the convex part 17. FIG.

  The length L of the convex portion 17 (FIG. 2B) is ½ or less of the full width of the column 5. In addition, the length L of the convex part 17 points out the protrusion margin from the inner surface of a main-body part. By doing in this way, a pair of beam joining member 13 can be joined facing a pillar.

  For example, in FIG. 4, when the beam 9a on the left side of the column 5 is in the same mode as the beam 9b (in this case, the beam 9a is bonded in the other direction), the beam connecting member 13 is It is necessary to join a pair so as to sandwich them from the left and right. In this case, if the length L of the convex part 17 of the beam joining member 13 is ½ or less of the full width of the column 5, the convex parts 17 do not interfere with each other.

  Thus, by providing the beam joining member 13 between the diaphragm 3b and the beam 9b, the downward stress from the beam 9b, the moment starting from the joint with the diaphragm 3a, and the like can be reliably applied to the column 5. Can communicate. Moreover, the thickness of the beam joining member 13 can be appropriately set according to the distance between the beam 9b and the diaphragm 3b. Therefore, even when the distance between the beam 9b and the diaphragm 3b is narrow, it can be applied as a means for transmitting stress from the beam 9b to the column 5.

  Moreover, since the beam joining member 13 has the convex parts 17 at both ends, it can be joined to the three sides of the column 5. That is, not only the side to which the beam 9b is joined, but also the column 5 and the diaphragm 3b in a direction perpendicular thereto are joined. Therefore, the deformation of the diaphragm 3b is suppressed, and the stress from the beam 9b can be efficiently transmitted to the column 5.

  In the present embodiment, the beam 9b has a lower height than the beam 9a. However, the present invention can be applied even when the beam 9b is higher than the beam 9a. In this case, the web of the beam 9b may be cut out in a predetermined range, and the beam joining member 13 may be joined to the column 5 and the lower surface of the diaphragm 3b.

  Moreover, the beam joining member 13 does not need to be installed in the lower part of the beam 9b, and may be provided in the upper part. In this case, what is necessary is just to join the beam 9b and the beam joining member 13 in the state which the upper and lower sides of FIG.

  Next, a modified example of the column-to-beam joint structure 1 is shown. In addition, in the following description, about the structure which show | plays the function similar to the junction structure 1 of a pillar and a beam, the code | symbol same as FIGS. 1-4 is attached | subjected, and the overlapping description is abbreviate | omitted.

  5A and 5B are views showing the beam joining member 13a, in which FIG. 3A is a perspective view and FIG. 3B is a plan view. The beam joining member 13 a has substantially the same configuration as the beam joining member 13, but differs in that the convex portion 17 is formed only on one end side of the main body portion 15. That is, the beam joining member 13 is substantially U-shaped, whereas the beam joining member 13a is a substantially L-shaped member. The width and thickness of the main body, the length of the convex portion 17 and the radius of curvature of the inner surface of the convex portion are the same as those of the beam joining member 13.

  FIG. 6 is a diagram (corresponding to FIG. 4) showing a column-to-beam joint structure 1 a using a beam joint member 13 a instead of the beam joint member 13. The beam joining member 13a is joined to the diaphragm 3b, the column 5, and the beam 9b in substantially the same manner as the beam joining member 13, but the joining position of the beam 9b is different from the joining structure 1 of the column and the beam.

  In the column-beam joint structure 1 a, the beam 9 b is arranged eccentrically in the width direction of the column 5. That is, the beam 9b is eccentric with respect to the column 5 so that one side surface (lower side in the drawing) of the column 5 and one side surface (lower side in the drawing) of the beam 9b (flange portion 11b) coincide with each other. Placed in position.

  The convex portion 17 formed on the beam joining member 13a is disposed on the eccentric direction side of the beam 9b. Therefore, the deformation of the diaphragm 3b is suppressed, and the stress from the beam 9b can be efficiently transmitted to the column 5.

  Note that the convex portion 17 is not formed on the side opposite to the eccentric direction of the beam 9b (upward in the figure), and only the main body portion 15 is joined to the diaphragm 3b. Therefore, on the side where the convex portion 17 is not formed, the stress transmission from the beam 9b to the column 5 via the beam joining member 13a is inferior to the side where the convex portion 17 is formed. However, since the side where the convex part 17 is not formed is far from the joint part of the beam 9b, the influence is small. Therefore, the stress from the beam 9b to the column 5 can be efficiently transmitted by arranging the convex portion 17 on the side to which the beam 9b is joined.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  For example, in the reinforcing member 13, the inner surface of the convex portion 17 is the concave curved surface portion 16, but the portion may not necessarily be a curved surface. For example, the inner surface of the convex portion 17 may be formed by connecting a plurality of straight lines, or may be tapered. Also in this case, when the reinforcing member is joined to the column 5, the inner surface of the convex portion 17 may not interfere with the curved surface portion 7.

DESCRIPTION OF SYMBOLS 1, 1a ......... Column-beam joining structure 3a, 3b ......... Diaphragm 5 ......... Pillars 9a, 9b ......... Beam 11a, 11b ......... Flange portions 9, 9a, 9b ......... Beam joint members 13, 13a... Beam joining member 15... Main body 16... Concave surface 17.

Claims (5)

It is a joint structure between a column and a beam,
A pair of diaphragms formed on the pillars;
A first beam in which each flange portion is joined to the upper and lower diaphragms;
A second beam having a height different from that of the first beam and joined to the column in a direction different from that of the first beam;
Provided on the outer surface of the pillar, and having a thickness substantially the same as the protruding amount of the diaphragm from the outer surface of the pillar, and a body portion having substantially the same width as the diaphragm, and at least one end of the body portion, A joining member having substantially the same width as the protruding amount and having a convex part formed in the thickness direction of the main body part,
One flange portion of the second beam is joined to one of the diaphragms, the main body portion and the convex portion of the joining member are joined to the column and the other diaphragm, and the other of the second beams Are joined to the joining member,
A column-to-beam joint structure in which stress is transmitted between the other flange portion of the second beam and the other diaphragm through the joint member. The convex portion is formed at one end of the joining member,
The second beam is joined to the column eccentrically in the width direction,
The convex portion is a surface perpendicular to the surface of the column to which the second beam is bonded, and is connected to the column and the other diaphragm in the eccentric direction of the second beam. The column-to-beam joint structure according to claim 1, wherein The convex portions are formed at both ends of the joining member,
2. The column according to claim 1, wherein the convex portions on both sides are respectively joined to a column and the other diaphragm in a direction perpendicular to a surface of the column to which the second beam is joined. Connection structure with beams.   The length of the said convex part is 1/2 or less of the width | variety of the said pillar, The junction structure of the pillar and beam in any one of Claims 1-3 characterized by the above-mentioned.   The column has a substantially rectangular cross-sectional outer shape, a corner portion is formed by a curved surface portion, and an inner surface shape of the convex portion has a concave curved surface portion substantially corresponding to a shape of the curved surface portion. The column-beam connection structure according to any one of claims 1 to 4, wherein a curvature radius is smaller than a curvature radius of the curved surface portion.

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