JP2017066600A - Column-beam connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a column-beam connection structure that enables a beam to be efficiently welded on a column-beam connection.SOLUTION: End face parts of through-diaphragms 2, 3 disposed on a column-beam connection 1 that connects a column 10 and beams 4, 5 comprise a first end face part A having a first projection amount and a second end face part B having a second projection amount that is smaller than the first projection amount. A beam depth of the beam 5 is smaller than a vertical distance between the through-diaphragms 2, 3. An upper flange 5a is welded and fixed on the first end face part A and a lower flange 5b is welded and fixed at a position displaced from the second end face part B toward a body side of the column-beam connection 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a column beam connection structure in which a column and a beam are bonded to a column beam connection portion.

  As shown in FIGS. 3A and 3B, a column beam joint 101 is fixed between the columns 100 and 100 by welding. The column beam joint 101 is provided with diaphragms 102 and 103 passing vertically. The upper and lower flanges of the beam 104 whose beam length coincides with the interval between the through diaphragms 102 and 103 are fixed to the end surfaces of the through diaphragms 102 and 103 by welding. On the other hand, for the beam 105 whose beam is shorter than the interval between the through diaphragms 102 and 103, the upper flange is welded to the end surface portion of the through diaphragm 102, but the lower flange is positioned above the through diaphragm 103. Welded to the joining face plate 101a.

  A haunch structure using a built-in H-section steel is known as another method for joining a beam 105 having a beam length shorter than the interval between the through diaphragms 102 and 103 to the through diaphragms 102 and 103.

  Further, Patent Document 1 discloses another method for joining a beam 105 whose beam is lower than the interval between the through diaphragms 102 and 103 to the column beam joint 101.

JP 2012-72575 A

  However, as shown in FIG. 3A, when the distance between the lower flange of the beam 105 and the lower through diaphragm 103 is narrow, an attempt is made to weld the lower surface side of the lower flange with the welding machine 200. Then, for example, there is a problem that the end surface portion of the lower through diaphragm 103 interferes with the tip of the welding machine 200 and the welding operation cannot be performed efficiently. On the other hand, as shown in FIG. 3B, when the upper surface side of the lower flange of the beam 105 is welded by the welding machine 200, the web of the beam 105 must be provided with a scallop, and therefore Work burden occurs.

  Moreover, in the haunch structure using a built-in H-section steel, there is a drawback that it is expensive because a roll H-section steel is not used. Moreover, since the structure disclosed in Patent Document 1 is based on bolt fastening, there is a drawback that the structure is complicated and expensive.

  This invention makes it a subject to provide the column beam junction structure which can weld a beam efficiently to a column beam junction part in view of said situation.

  In order to solve the above-described problem, the column beam connection structure according to the present invention provides a first end surface that is a first protrusion amount as an end surface portion of a through diaphragm provided in a column beam connection portion that joins a column and a beam. And a second end face portion that does not protrude or has a second protrusion amount smaller than the first protrusion amount, and at least one of upper and lower beam flanges in at least one beam is the second end surface portion. It is fixed by welding at a position shifted from the end face to the main body side of the column beam joint.

  If it is said structure, when the flange of a beam is weld-fixed in the position shifted | deviated from the said 2nd end surface part of the said through-diaphragm to the main body side of the said column beam junction part, the said 2nd end surface part does not protrude, or Since the second protrusion amount is smaller than the first protrusion amount, the second end surface portion is less likely to interfere with the tip of the welder even when the gap between the flange of the beam and the through diaphragm is narrow. As a result, welding work can be performed efficiently. Moreover, since it can be made non-scalloped, a cross-sectional defect is not generated, and the processing load is reduced.

  A reinforcing plate may be provided at a height different from the height of the flange of the beam welded and fixed at a position shifted to the main body side of the column beam joint in the column beam joint. According to this, even when the gap between the flange of the beam and the through diaphragm is narrow, the reinforcing plate can be appropriately fixed by welding.

  Both the upper and lower through-diaphragms may be welded and fixed at positions where the upper and lower flanges of the beam that are not joined to the first end surface portion are displaced from the second end surface portion on the side of the surface that becomes the second end surface portion.

  The surface through which the upper and lower through diaphragms both form the second end surface portion may be located on the outer wall side of the building. According to this, it becomes possible to provide the outer wall of a building at a position closer to the column beam joint.

  The first protrusion amount may be 20 mm or more and 30 mm or less, and the second protrusion amount may be 10 mm or less.

  According to the present invention, the end surface portion of the through diaphragm is less likely to interfere with the tip of the welding machine, and the welding operation can be performed efficiently. Moreover, since it can be made non-scalloped, a cross-sectional defect is not generated, and the processing load is reduced.

FIG. 1 is a schematic view showing a beam-column joint structure according to an embodiment of the present invention, where FIG. 1 (A) is a front view, FIG. 1 (B) is a side view, and FIG. 1 (C) is a plan view. . FIG. 1 is a schematic side view showing a column beam connection structure according to another embodiment of the present invention. It is the schematic side view which showed the conventional column beam junction structure.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, in the column beam connection structure according to this embodiment, a column beam connection portion 1 made of a steel frame having a rectangular cross section is welded between the columns 10 and 10 made of a steel frame having a rectangular cross section. It is fixed. An upper through diaphragm 2 is provided by welding on the upper side of the beam-column joint 1 and a lower through diaphragm 3 is provided by welding on the lower side. A portion between the upper through diaphragm 2 and the lower through diaphragm 3 is a main body of the column beam joint 1. In addition, as the upper through diaphragm 2 and the lower through diaphragm 3, SN material C is used.

  There are a first protrusion amount and a second protrusion amount in the protrusion amounts of the end face portions of the through diaphragms 2 and 3 (protruding dimensions based on the joint surface plate 1a). That is, the end surface portion of the through diaphragm provided in the beam-column joint 1 has a first end surface portion A that is a first protrusion amount and a second protrusion amount that is smaller than the first protrusion amount. And a second end face portion B having the same. The second end surface portion B is not limited to the end surface having the second protrusion amount, but includes an end surface that does not protrude. The first projecting amount is a value that takes into account the thermal effect on the beam-to-column joint 1 and the column 10 when a beam flange is welded to the end surface.

  For example, the first protrusion amount of the through diaphragms 2 and 3 may be 20 mm or more and 30 mm or less, and the second protrusion amount may be 10 mm or less. Desirably, the second protrusion amount is 7 mm or less. More preferably, the second protrusion amount is 6 mm or less. In general, the projecting amount of the through diaphragm is recommended to be 25 mm (when the steel pipe plate thickness <28 mm).

  The beam 4 made of H-shaped steel whose beam coincides with the interval between the through diaphragms 2 and 3 has its upper flange 4a fixed to the first end surface portion A of the upper through diaphragm 2 by welding, and the lower flange 4b. The lower through-diaphragm 3 is fixed to the first end surface portion A by welding.

  For the beam 5 whose beam is shorter than the interval between the through diaphragms 2 and 3, the upper beam flange (hereinafter referred to as the upper flange 5 a) is welded and fixed to the first end surface portion A of the upper through diaphragm 2. Is done. On the other hand, a lower beam flange (hereinafter referred to as a lower flange 5 b) of the beam 5 is welded to the joint surface plate 1 a located on the lower through diaphragm 3. The said joint surface board 1a is corresponded to the board part of each surface of the main body of the said column beam junction part 1 which has a square cylinder shape. And the welding in the lower side flange 5b is performed in the lower surface side (side in which a web is not located), and an award is provided suitably in the upper surface side (side in which a web is located). An end surface portion of the lower through diaphragm 3 located below the lower flange 5b is a second end surface portion B.

  A reinforcing plate 6 is horizontally provided in the column beam joint 1 so as to be shifted to the side farther from the lower through diaphragm 3 (upper side) than the position of the lower flange 5b. The thickness of the reinforcing plate 6 may be, for example, equal to or greater than the thickness of the column beam joint 1. Here, the inner surfaces of the two plate portions (having the same plate thickness as the bonding surface plate 1a) of the column beam bonding portion orthogonal to the bonding surface plate 1a of the column beam bonding portion 1 and the reinforcement A square surface on the joint surface plate 1a surrounded by the plate 6 and the inner surfaces of the lower through diaphragm 3 is a surface having an out-of-plane bending total plastic yield strength greater than the total plastic moment of the beam and a yield moment greater. It has outer bending yield strength and punching shear strength.

  If the reinforcing plate 6 can be easily welded in the column beam joint 1 at a height corresponding to the position of the lower flange 5b, it may be provided at such a height. Although the reinforcing plate 6 can be called an inner diaphragm, when it is not easy to arrange the reinforcing plate 6 at such a height, the reinforcing plate 6 is arranged as described above.

  In the case of the above configuration, when the lower flange 5b of the beam 5 is welded and fixed at a position shifted from the second end surface portion B of the through diaphragms 2 and 3 to the main body side of the column beam joint portion 1, Since the second end surface portion B does not protrude or has a second protrusion amount smaller than the first protrusion amount, even when the gap between the lower flange 5b of the beam 5 and the lower through diaphragm 3 is narrow, The second end surface portion B is less likely to interfere with the tip of the welding machine, and the welding operation can be efficiently performed on the lower surface side (side where the web is not positioned). Moreover, since it can be made non-scalloped, a cross-sectional defect is not generated, and the processing load can be reduced.

  In the above example, the upper flange 5a of the beam 5 whose beam is shorter than the interval between the through diaphragms 2 and 3 is welded to the end surface portion of the upper through diaphragm 2. However, the present invention is not limited to this. The lower flange 5b may be welded to the end surface portion of the lower through diaphragm 3, and the upper flange 5a may be welded to the joining face plate 1a located below the upper through diaphragm 2. In this case, In the upper through diaphragm 2, the corresponding end surface portion is the second end surface portion B, and in the lower through diaphragm 3, the corresponding end surface portion is the first end surface portion A. In this case, the reinforcing plate 6 is provided in the column beam joint 1 so as to be shifted to the side farther from the upper through diaphragm 2 (lower side) than the position of the upper flange 5a.

  As described above, by providing the reinforcing plate 6 at a height different from the height of the lower flange 5b of the beam 5 that is welded and fixed at a position shifted to the main body side of the column beam joint 1, It becomes easy to carry out welding fixation of the reinforcing plate 6.

  As shown in FIG. 1 (C), the upper and lower through diaphragms may both be located on the outer wall side of the building. According to this, it becomes possible to provide the outer wall of a building in the position close | similar to the said column beam junction part 1. FIG.

  In addition, as shown in FIG. 2, the upper and lower through diaphragms 2, 3 are both on the side where the second end surface portion B is formed, and the upper and lower flanges 5 a, 5 b of the beam 5 are both displaced from the second end surface portion B. It may be fixed by welding at a different position.

  The present invention can also be applied to a structure in which the column 10 provided on the upper side of the beam-column joint 1 is thinner than the column 10 provided on the lower side of the beam-column joint 1. Also in this case, the protruding amount of the upper and lower diaphragms 2 and 3 is set to a protruding dimension based on the joint face plate 1a.

  When the gap between the flanges 5a and 5b of the beam 5 and the upper and lower diaphragms 2 and 3 is wide, that is, when interference with welding is not particularly generated (for example, when the gap exceeds 50 mm), the flange 5a. Even when 5b is welded to the joint surface plate 1a, the corresponding end surface portion may be the first end surface portion A.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

DESCRIPTION OF SYMBOLS 1: Column beam junction part 1a: Joining surface board 2: Upper side diaphragm 3: Lower side diaphragm 4: Beam 4a: Upper flange 4b: Lower flange 5: Beam 5a: Upper flange 5b: Lower flange 6: Reinforcement board 10 : Pillar

Claims (5)

  As the end surface portion of the through diaphragm provided in the column beam joint for joining the column and the beam, the first end surface portion which is the first protrusion amount and the second end portion which does not protrude or is smaller than the first protrusion amount. And at least one of the upper and lower beam flanges of at least one beam is welded and fixed at a position shifted from the second end surface portion to the main body side of the column beam joint portion. Column beam connection structure characterized by being made.   2. The beam-to-column connection structure according to claim 1, wherein a reinforcing plate is provided in the beam-column joint with a height different from the height of the flange of the beam welded and fixed at a position shifted to the main body side of the beam-column joint. Column beam connection structure characterized by being provided.   3. The beam-column joint structure according to claim 1 or 2, wherein both the upper and lower flanges of the beam that are not joined to the first end surface portion are on the side where both the upper and lower through diaphragms become the second end surface portion. A beam-to-column connection structure characterized by being welded and fixed at a position shifted from the two end face portions.   3. The column beam connection structure according to claim 1 or 2, wherein a surface where the upper and lower through diaphragms both serve as the second end surface portion is located on the outer wall side of the building.   5. The beam-column joint structure according to claim 1, wherein the first protrusion amount is 20 mm or more and 30 mm or less, and the second protrusion amount is 10 mm or less. Column beam connection structure.

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