JP2013060752A - Joint structure of beam and column, and joint member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple joint structure of beams and a column, which allows beams having different heights to be joined to a column without junction of a component such as a diaphragm within the column, through work outside the column only.SOLUTION: A beam joint member 9 includes a column joint surface 14 on the bottom face side and a beam installation surface 16 on one side face. The column joint surface 14 and the beam installation surface 16 are thus approximately perpendicular to each other. The column joint surface 14 is a region to be joined to the surface of a column. The column joint surface 14 is provided with a recess 15. Preferably the depth of the recess 15 is equal to or more than a half of the body thickness of the beam joint member 9. The column joint surface 14 is provided with a cutout part 11 along the width direction. The cutout part 11 prevents the interference with a diaphragm. In the vicinity of the cutout part 11, the recess 15 is provided with a rib 17 in the width direction on as needed basis. The rib 17 prevents the deformation of the beam joint member so as to reinforce the beam joint member.

Description

  The present invention relates to a beam-column connection structure or the like for connecting 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 a problem, and when joining beams having different heights to a column, a member such as a diaphragm is not joined to the inside of the column, and a simple structure is used only outside the column. It is an object of the present invention to provide a joint structure between a beam and a column that can be worked on.

  In order to achieve the above-described object, a first invention is a joint structure between a beam and a column, a column joint surface joined to the column, and a beam installation surface which is a surface substantially perpendicular to the column joint surface. The column joint surface includes a pair of diaphragms formed on the pillars, and a pair of diaphragms formed on the columns using a joining member in which a notch for preventing interference with the diaphragm is formed across the width direction of the main body. A first beam to which each flange portion is bonded to the diaphragm, and a second beam having a height different from that of the first beam and bonded to the column in a direction different from the first beam. And the thickness of the joining member at the intersection of the extension of the diaphragm and the joining member that prevents interference at the notch is set to be greater than the thickness of the column, One flange of the beam is in contact with one of the diaphragms. The column joining surface of the joining member is joined to the outer surface side of the pillar between the other flange portion of the second beam and the other diaphragm, and the second joining member is connected to the second beam through the joining member. It is a joining structure of a beam and a column, wherein stress transmission is performed between the other flange portion of the beam and the other diaphragm.

  A concave portion is provided on the column joining surface side, and the depth of the concave portion is a depth of half or more of the total thickness of the joining member, and an extension portion of the diaphragm that prevents interference at the notch portion; It is desirable that the thickness of the joining member at the intersection with the joining member is set to be larger than the thickness of the column. It is desirable that the lower surface of the other flange surface of the second beam is in contact with the beam installation surface of the joining member. Ribs may be formed in the recess in the width direction.

  According to the first invention, the concave portion is formed on the side of the joint surface to be joined to the column, and the depth of the concave portion is more than half of the thickness of the main body, thereby achieving weight reduction without having excessive strength. Can do. For example, when a force is applied in a direction in which the beam is separated from the column, the column bears a tensile force and the joining member bears a compressive force. At this time, the compressive force applied to the joining member is handled by the outer side from the center of the thickness of the joining member.

  That is, with respect to the direction of the force from the beam described above, the inner side from the center of the thickness of the joining member does not bear the compressive force, and the tensile force is handled by the column. It is unnecessary. Therefore, it is possible to achieve both high strength and light weight by forming a recess in this part.

  In addition, if the joining member is welded to the diaphragm and the outer surface of the column, and the lower surface of the flange portion of the beam contacts the beam installation surface of the joining member, the stress from the beam can be reliably transmitted to the column.

  In addition, if the rib is formed in the width direction in the concave portion, it is possible to prevent deformation of the joining member when force is applied from the beam to the column.

  2nd invention is a joining member of a beam and a pillar, Comprising: The column joining surface joined to a column, The beam installation surface which is a surface substantially perpendicular | vertical to the said column joining surface, The width direction of the said column joining surface A notch for preventing interference with the diaphragm, and a recess having a depth of at least half of the thickness of the joining member is formed on the column joining surface. It is a joining member characterized by these.

  According to the second aspect of the invention, it can be used for a joint between a beam and a column having different sizes, can transmit stress from the beam to the column efficiently, and obtain a lightweight beam joint member. it can.

  According to the present invention, when beams having different heights are joined to a column, the beam and the column can be operated only with the outside of the column with a simple structure without joining a member such as a diaphragm inside the column. A joining structure can be provided.

The perspective view which shows the junction structure 1 of a column and a beam. It is a perspective view which shows the beam joining member 9, (a) is a top perspective view, (b) is a bottom perspective view. FIG. 2 is an elevational view showing a joint structure 1 between a column and a beam, and is a cross-sectional view taken along line AA of FIG. (A) is an elevation view showing a column-to-beam joint structure 1, and is a cross-sectional view taken along the line BB in FIG. It is a perspective view which shows the beam joining member 21, (a) is a top perspective view, (b) is a bottom perspective view. FIG. 3 is an elevation view showing a column-to-beam joint structure 20.

  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 column-to-beam joint structure 1 is a structure in which a plurality of beams 7 a and 7 b are joined to a column 5.

  The column 5 is a hollow square steel pipe, and the beams 7a and 7b are H-shaped steel. The beam 7a and the beam 7b have different beam heights. 1 shows an example in which the beam 7a is formed in three directions of the column 5 and the beam 7b is formed in one direction. However, the present invention is not limited to this, and the beam 7b is provided in a plurality of directions. Also good.

  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 7a are joined to the diaphragms 3a and 3b by welding, respectively. That is, the installation intervals of the diaphragms 3a and 3b coincide with the flange portion intervals of the beam 7a. Therefore, the stress from the beam 7a can be reliably transmitted to the column.

  The end of the upper flange portion 8a of the beam 7b is joined to the upper diaphragm 3a by welding. Since the beam 7b is lower than the beam 7a, a gap is generated between the flange portion 8b below the beam 7b and the diaphragm 3b.

  In the present invention, the beam joining member 9 is joined between the diaphragm 3b and the flange portion 8b of the beam 7b. That is, the flange portion 8b of the beam 7b and the diaphragm 3b are joined via the beam joining member 9. Therefore, the stress from the beam 7b can be reliably transmitted to the column.

  2A and 2B are perspective views showing the beam joining member 9, wherein FIG. 2A is a top perspective view and FIG. 2B is a bottom perspective view. The beam bonding member 9 has a column bonding surface 14 on the bottom surface side and a beam installation surface 16 on one side surface. That is, the column joining surface 14 and the beam installation surface 16 are formed substantially perpendicularly.

  The column bonding surface 14 is a portion to be bonded to the column surface. A recess 15 is formed in the column bonding surface 14. It is desirable that the depth of the recess 15 is a depth that is at least half the thickness of the main body of the beam joining member 9.

  Moreover, the notch part 11 is formed in the column joint surface 14 over the width direction. The notch 11 avoids interference with the diaphragm. In the vicinity of the notch 11, the recess 15 is provided with a rib 17 in the width direction as necessary. The end surface of the rib 17 may be flush with the column bonding surface 14, or the height of the rib 17 may be lower than the depth of the recess 15. The ribs 17 reinforce the beam joint member by preventing deformation of the beam joint member.

  Tapered portions 13 are provided at the edges of the beam connecting members 9 with the column connecting surfaces on both sides. The taper portion 13 indicates a welding allowance between the beam joining member 9 and the column 5. This is because if the welding allowance is too small, the welding strength cannot be ensured, and if the welding allowance is too large, the distortion of the beam joining member and the like becomes large and excessive cost is required. Therefore, the taper part 13 for showing an appropriate welding allowance is formed.

  The beam joining member 9 is formed so that the thickness is the largest in the notch 11 and gradually decreases toward both ends. The shape of the beam joining member 9 is not limited to the illustrated example, and the shape of the recess 15 and the outer shape of the beam joining member 9 are appropriately set as long as the configuration described above is provided.

  FIG. 3 is a diagram showing a column-to-beam joint structure 1 and is a cross-sectional view taken along line AA in FIG. Similarly, FIG. 4A is a cross-sectional view taken along line BB in FIG.

  As shown in FIG. 3, the beam joining member 9 is joined to the column 5 so that the upper surface (beam installation surface 16) is in contact with the lower surface of the flange portion 8b of the beam 7b. That is, the beam joining member 9 is fixed so as to fill a space between the upper surface of the projecting portion of the diaphragm 3b which is a through diaphragm and the lower surface of the beam 7b.

  As described above, the notch portion 11 is formed at a portion corresponding to the joint portion of the beam joining member 9 with the diaphragm 3b. For this reason, the beam joining member 9 and the diaphragm 3b do not interfere with each other. The lower end of the beam joining member 9 is located below the diaphragm 3b. That is, the beam joining member 9 is joined to the outer peripheral surface of the column 5 across the diaphragm 3b.

  The beam joining member 9 and the column 5 are joined by the welded portion 19 in the tapered portion described above. The contact surface between the lower surface of the flange portion 8b of the beam 7b and the beam installation surface 16 is not necessarily welded.

  In FIG. 3, the flange portion 8a above the beam 7b and the contact portion of the diaphragm 3a are welded, and the contact portion between the web portion of the beam 7b and the end portion of the flange portion 8b and the outer peripheral surface of the column 5 is welded. However, the contact portion between the beam joining member 9 and the column 5 and the diaphragm 3b may be welded. However, the beam joining member 9 may be welded to the outer peripheral surface of the column 5, and the beam joining member 9 and the diaphragm 3b Does not necessarily need to be welded. In this case, the notch 11 may be enlarged, and a gap may be formed between the beam joining member 9 and the diaphragm 3b.

  It should be noted that an extension portion of the diaphragm 3b to which the beam joining member 9 is joined (an extension portion in a direction orthogonal to the beam joining member 9 when the beam joining member 9 is joined to the vertical column) and the intersection of the beam joining member 9 Assuming that the thickness of the beam joining member 9 (the thickness at the bottom of the concave portion 15 at the part) is T, T is set to be larger than the thickness t of the column 5. That is, the depth of the concave portion 15 is set to be half or more of the total thickness of the main body of the beam joining member 9 and T is larger than t.

  In this manner, by providing the beam joining member 9 between the diaphragm 3b and the beam 7b, the downward stress from the beam 7b, the moment starting from the joint with the diaphragm 3a, and the like can be reliably applied to the column 5. Can communicate.

  FIG. 4B is a cross-sectional view taken along the line CC of FIG. As described above, the beam joining member 9 is welded to the column 5 at the tapered portion 13. In this state, when a force is applied from the beam to the column, the force is also applied to the beam joining member 9.

  For example, in FIG. 3, it is assumed that a force is applied in a direction in which the beam 7b moves away from the column 5c (right direction in the figure). In this case, a force in the tensile direction is applied to the inner side (E in the drawing) from the center (D in the drawing) in the thickness direction of the column 5 and the beam joining member 9. Further, a compressive force is applied to the outer side (F in the figure) than the center (D in the figure) in the thickness direction of the beam joining member 9.

  In this case, since the column 5 can handle the tensile force, excessive strength is not required on the inner side E of the center D of the beam joining member 9. On the other hand, on the outer side F from the center D of the beam joining member 9, since only the beam joining member 9 is responsible for the compressive force, high strength is required.

  In the beam joining member 9 according to the present invention, the portion (F) where high strength is required is thick, and in the portion (E) where strength is not required, a recess 15 is formed to reduce the thickness. . That is, in a state where the column 5 is bonded, the thickness of the portion far from the bonding surface of the column 5 is increased, so that the reinforcement can be efficiently performed and the weight can be reduced by the recess 15. In particular, the proof strength in the out-of-plane direction of the reinforced column can be improved by increasing the thickness of the portion far from the column.

  The beam joining member 9 need not be installed at the lower part of the beam 7b, but may be provided at the upper part. In this case, the beam 7b and the beam joining member 9 may be joined in a state where the top and bottom in FIGS. In this case, the bottom plate of the beam joining member 9 and the contact surface of the beam 7b need to be joined by welding or the like.

  As described above, according to the present embodiment, when the beams 7b having different heights are joined to the pillar 5, it is not necessary to provide an inner diaphragm inside the pillar 5, and a special joining hardware is provided. There is no need to join to part of the pillar. For this reason, it is excellent in the workability | operativity of a beam and a column.

  Further, the beam joining member 9 can be made of a general steel material, and therefore is inexpensive. In addition, since the vertical space between the upper surface (or lower surface) of the projecting portion of the through diaphragm and the lower surface (or upper surface) of the beam 7b is reliably filled with the beam joining member, the column 5 and the beam 7b are joined. The beam joint member can reliably receive the vertical force and moment from Therefore, the stress from the beam 7b can be reliably transmitted to the column 5 with a simple structure.

  Moreover, since the recessed part 15 is formed in the column joining surface side, since it is lightweight and especially the thickness of the site | part which needs an intensity | strength is thick, it can reinforce efficiently.

  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, the tapered portion 13 does not necessarily have a tapered shape, and may be a stepped portion, a marking line or the like as long as the welding allowance can be visually recognized.

  In the above-described embodiment, the concave portion is formed on the column bonding surface, but the concave portion is not necessarily required. FIGS. 5A and 5B are perspective views showing the beam joining member 21 having no recess, where FIG. 5A is a top perspective view and FIG. 5B is a bottom perspective view. The beam bonding member 21 has a column bonding surface 24 on the bottom surface side and a beam installation surface 26 on one side surface. That is, the column joining surface 24 and the beam installation surface 26 are formed substantially perpendicularly. The column bonding surface 24 is a part bonded to the surface of the column. The notch 12 is formed in the column bonding surface 24 in the width direction. The notch 12 avoids interference with the diaphragm.

  A marking line 23 is provided in the vicinity of the edge of the beam joining member 21 on both sides with the column joining surface 24 as necessary. The marking line 23 is for specifying the welding range between the beam joining member 21 and the column 5, and has the same function as the tapered portion 13.

  FIG. 6 is a diagram showing a column-beam joint structure 20. As shown in FIG. 6, the beam joining member 21 is joined to the column 5 so that the upper surface (beam installation surface 26) is in contact with the lower surface of the flange portion 8b of the beam 7b. That is, the beam joining member 21 is fixed so as to fill a space between the upper surface of the protruding portion of the diaphragm 3b that is a through diaphragm and the lower surface of the beam 7b.

  As described above, the notch portion 12 is formed at a portion corresponding to the joint portion of the beam joining member 21 with the diaphragm 3b. For this reason, the beam joining member 21 and the diaphragm 3b do not interfere with each other. The lower end of the beam joining member 21 is located below the diaphragm 3b. That is, the beam joining member 21 is joined to the outer peripheral surface of the column 5 across the diaphragm 3b.

  In FIG. 6, the flange portion 8a above the beam 7b and the contact portion of the diaphragm 3a are welded, and the contact portion between the web portion of the beam 7b and the end portion of the flange portion 8b and the outer peripheral surface of the column 5 is welded. However, the contact portion between the beam joining member 21 and the column 5 and the diaphragm 3b may be welded. However, the beam joining member 21 may be welded to the outer peripheral surface of the column 5, and the beam joining member 21 and the diaphragm 3b Does not necessarily need to be welded. In this case, the notch 12 may be enlarged and a gap may be formed between the beam joining member 21 and the diaphragm 3b.

  It should be noted that an extension portion of the diaphragm 3b to which the beam joining member 21 is joined (when the beam joining member 21 is joined to a vertical column, an extension portion in a direction perpendicular to the extension) and the beam joining member 21 is intersected. When the thickness of the beam joining member 21 is T, T is set to be larger than the thickness t of the column 5.

  Thus, even when the beam joining member 21 having no recess is used, the same effect as that of the beam joining member 9 can be obtained.

1, 20... Column-to-beam joint structure 3a, 3b .... Diaphragm 5 .... Columns 7a, 7b. 12 ......... Notched portion 13 ......... Tapered portion 14, 24 ......... Column joint surface 15 ......... Recessed portion 16, 26 ......... Beam installation surface 17 ......... Rib 19 ......... Welded portion 23 ... ... marking line

Claims (5)

It is a joint structure between a beam and a column,
A column-joining surface to be joined to the column, and a beam installation surface that is substantially perpendicular to the column-joining surface, and the column-joining surface has a notch for preventing interference with the diaphragm. Using a joining member formed across the width direction of
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;
The thickness of the joining member at the intersection of the diaphragm extension and the joining member that prevents interference at the notch is set to be greater than the thickness of the column,
One flange portion of the second beam is joined to one of the diaphragms, and the column of the joining member is disposed on the outer surface side of the column between the other flange portion of the second beam and the other diaphragm. A joining structure of a beam and a column, wherein joining surfaces are joined, and stress transmission is performed between the other flange portion of the second beam and the other diaphragm through the joining member.   A concave portion is provided on the column joining surface side, and the depth of the concave portion is a depth of half or more of the total thickness of the joining member, and an extension portion of the diaphragm that prevents interference at the notch portion; The beam-column joining structure according to claim 1, wherein the thickness of the joining member at an intersection with the joining member is set to be larger than the thickness of the column.   3. The joint structure between a beam and a column according to claim 2, wherein a rib is formed in the concave portion in the width direction.   The joint structure of the beam and the column according to any one of claims 1 to 3, wherein a lower surface of the other flange surface of the second beam is in contact with the beam installation surface of the joining member. . A joining member between a beam and a column,
A column joining surface to be joined to the column;
A beam installation surface which is a surface substantially perpendicular to the column joining surface;
A notch for preventing interference with the diaphragm, which is formed across the width direction of the column joining surface,
A concave member having a depth of at least half of the thickness of the bonding member is formed on the column bonding surface.

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