JP2018204205A - Joint structure and building - Google Patents

Abstract

To provide a joint structure and a building which are more resistant to an earthquake than before.SOLUTION: In the present invention, a base plate 33 welded in overlapping relation to an end face of an H-shaped steel column 30 is fixed overlapped on a flange 21 of an H-shaped steel first beam 20. The base plate 33 is provided with a pair of base overhang parts 34, 34 extending from the column 30 to both sides and fixed to the flange 21 of the first beam 20. Between the pair of flanges 21, 21 of the first beam 20, there is provided reinforcing stiffeners 24, 24 located in a pair of imaginary first planes which are orthogonal to tips of the pair of base overhang parts 34, 34 and which are spaced outwardly from a pair of flanges 31, 31 of the column 30.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a joint structure in which a pillar and a beam of an H-shaped steel are connected, and a building having such a joint structure.

  Conventionally, in this type of joint structure, a plate is welded to the end face of a column, and the plate is fixed to a flange of the beam by bolts or welding. In addition, a stiffener for reinforcement is provided between the pair of flanges of the beam in order to suppress the vertical compression / tensile deformation of the beam due to the force from the column (see, for example, Patent Document 1).

JP 2007-327296 A (paragraph [0016], FIG. 2)

  However, in recent years when earthquake countermeasures are regarded as important, there is a demand for the development of a joint structure that is more resistant to earthquakes than the conventional one described above.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a joint structure and a building that are more resistant to earthquakes than before.

  In order to solve the above-mentioned problem, when the load on the building is analyzed by simulation or the like when an earthquake occurs, it can be seen that the beam of the joint is bent and twisted by the load received from the column. However, considering the vertical load that the beam of the joint normally receives from the column, it is technically common to place the stiffener for reinforcement in the same plane as the column flange between the beam flanges. ing. In conventional earthquake countermeasures, the load is distributed by increasing the number of joints by increasing the number of columns, and by increasing the formation of the columns and beams and the plate thickness. However, if it does so, the weight of a building will increase and the load by an earthquake will become large, and the problem that assembly | attachment work will increase will arise. From these, the inventor of the present application considers that the balance between the strength against compression / tensile deformation and the strength against bending / twist deformation is poor in the conventional joint structure, overturning the conventional common sense, and the spacing between the stiffeners for reinforcement The present invention has been completed by obtaining the detection that the strength against bending / twist deformation is increased by extending the distance between the pair of flanges of the pillars.

  That is, the invention according to claim 1 is a joint structure in which a base plate welded to be overlapped with an end face of an H-shaped steel column is overlapped and fixed to a flange of an H-shaped steel beam, and the base plate includes the column. A pair of base projecting portions that project from both sides of the beam and are fixed to the flanges of the beams, and are disposed between the pair of flanges of the beams and perpendicular to the pair of base projecting portions and It is a joint structure provided with a stiffener for reinforcement located in a pair of fictitious first planes that are spaced outward from a pair of flanges of a column.

  The invention according to claim 2 is the joint structure according to claim 1, wherein no stiffener is provided in an imaginary pair of second planes including the pair of flanges of the pillar.

  According to a third aspect of the present invention, an inner portion and an outer portion of the base plate with respect to the flange of the column are fixed to the flange of the beam by a plurality of bolts, and perpendicular to the second plane, the flange of the beam The joint structure according to claim 2, further comprising a contact plate that is directed to the inner surface of the base plate and sandwiches the flange of the beam with the base plate by tightening the plurality of bolts.

  According to a fourth aspect of the present invention, there is provided the joint according to any one of the first to third aspects, wherein a reinforcing rib for connecting the pair of base projecting portions and the side surface of the column is provided. Structure.

  The invention according to claim 5 is the joint structure according to claim 4, further comprising a facing rib that stands up from a tip end portion of each of the base projecting portions and faces the side surface of the column and is connected to the reinforcing rib. .

  A sixth aspect of the present invention is the joint structure according to the fifth aspect, wherein the opposing rib is disposed in the first plane.

  The invention according to claim 7 is the beam according to any one of claims 1 to 6, wherein the beam is sandwiched from above and below by the pair of columns, and the structures of the ends of the pair of columns on the beam side are the same. It is the joint structure according to claim 1.

  In the invention of claim 8, between the pair of flanges of the beam, a stiffener for beam connection is provided in a center plane between the pair of flanges of the column, and the beam to which the column is connected is defined as The joint structure according to any one of claims 1 to 7, wherein another H-beam steel web is connected to the beam connecting stiffener.

  The invention of claim 9 is a building which is a multi-storey steel-framed multi-storied dwelling structure in which a plurality of dwelling units are arranged in the row direction, and extends in a first direction which is one of the row direction or the beam direction. A building comprising a plurality of first beams having a plurality of joint structures according to any one of claims 8 in the second direction, which is the other of the beam running direction or the beam-to-beam direction.

  The invention according to claim 10 is the invention according to any one of claims 1 to 8, wherein the first direction is a row direction, and between the adjacent units in the row direction of the building and between the adjacent dwelling units. And a plurality of second beams extending between the first beams and extending between the first beams, and bearing walls or braces arranged on the second beams. The building according to claim 9.

  According to an eleventh aspect of the present invention, the first direction is an inter-beam direction, and is arranged on the second beam, and a plurality of second beams extending in the column direction and passed between the first beams. The building according to claim 9, further comprising a bearing wall or a brace.

  In the joint structure according to claim 1, the stiffeners for reinforcement provided between the pair of flanges of the beam are arranged in a pair of fictitious first planes separated from the pair of flanges of the column on both outer sides. . That is, the distance between the stiffeners for reinforcement in the longitudinal direction of the beam is wider than the conventional one in which the stiffeners for reinforcement are arranged in the same plane as the pair of flanges of the columns. Thereby, the load which twists a pillar can be received with the stiffener for reinforcement arrange | positioned in the position away from the former with respect to the twist center, and twist strength improves. Further, even when the column is bent in the plane including the web of the column, it can be received by a stiffener for reinforcement arranged at a position farther away than the center of the bending, and the bending strength is improved. . Here, various loads that the beam receives from the column are transmitted to the stiffener for reinforcement via the flange of the beam. On the other hand, in the present invention, the base plate welded to the end face of the column is not just widened between the stiffeners for reinforcement, but is extended to both sides of the column to form a pair of base projecting portions, Since the stiffeners for reinforcement are arranged in a pair of first planes orthogonal to the pair of base projecting portions, the space between the stiffeners facing each other in the longitudinal direction of the beams is reinforced by the base plate. The increase in the load on the flange of the beam due to the expansion of the stiffener can be suppressed.

  Accordingly, in the joint structure of the present invention, the balance between the strength against the compressive / tensile deformation of the beam due to the load received from the column and the strength against the bending / twisting deformation is improved, and it is stronger against the earthquake than before. Moreover, in the building provided with this joint structure, the number of pillars can be reduced as compared with the conventional structure, and the weight of the building can be reduced. This also makes it more resistant to earthquakes and reduces the assembling work.

  If the reinforcement rib which connects between a pair of base overhang | projection part in a baseplate and the side surface of a pillar is provided like the structure of Claim 4, the bending strength of a base overhang | projection part will improve. In addition, as in the configuration of the fifth aspect, the torsional strength of the base overhanging portion is improved by connecting the opposing rib standing from the tip of the base overhanging portion and facing the side surface of the column to the reinforcing rib. In this case, it is preferable to arrange the opposing rib in a first plane that is substantially the same as the stiffener for reinforcement, as in the configuration of claim 6.

  In addition, it is good also as a structure which has a stiffener in a pair of 2nd plane containing a pair of flange of a pillar, and you may make it a structure which does not have (Invention of Claim 2). If the structure does not have a stiffener in the second plane, as in the configuration of claim 3, a patch plate orthogonal to the second plane and addressed to the inner surface of the flange of the beam is provided. The column and the beam can be connected by tightening the bolt so that the flange of the beam is sandwiched therebetween.

  In addition, the joint structure of the present invention has a joint having a column only below the beam (for example, a joint between a beam and a column that supports a ceiling beam) or a joint having a column only above the beam (for example, , Or a joint of a beam and a column supporting an underground beam), or by applying it to a joint provided with columns above and below the beam as in the configuration of claim 7. Building structure can be made strong against earthquakes.

  In the joint structure according to the eighth aspect, the beam can be reinforced also by a beam connecting stiffener that connects the beam and another beam.

  In the building which is an apartment house of claim 9, the entire building becomes strong against an earthquake due to the plurality of first beams extending in parallel to the first direction which is one of the beam running direction or the beam-to-beam direction. Moreover, according to the structure of Claim 10 and Claim 11, since the some 2nd beam spanned between 1st beams is equipped with several load-bearing walls or braces, it is the strength of the whole building. The balance is improved and it becomes even stronger against earthquakes.

The perspective view of the building concerning a 1st embodiment of the present invention. Cross section of building An enlarged cross-sectional view of part of a building Side sectional view of the building in the AA cross section of FIG. Side sectional view of the building in the BB cross section of FIG. Side view of joint Flat section of joint Side cross section of joint Side sectional view showing a part of bracing (A) Side view of joint according to second embodiment, (B) Plan sectional view (A) Side view of joint according to third embodiment, (B) Plan sectional view (A) Side view of joint according to fourth embodiment, (B) Plan sectional view (A) Side view of joint according to fifth embodiment, (B) Plan sectional view Plan sectional view of the building of the sixth embodiment Side sectional view of a building according to a modification of the present invention

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. An example of a building 10 is shown in FIG. This building 10 is a multi-storey residential building with a three-story steel frame, and has a substantially rectangular parallelepiped shape that is long in the column direction X.

  The structure of each level of the building 10 is substantially the same, and is divided into four dwelling units 11 in the direction X as shown in FIG. 2, and a passage 12 that connects these dwelling units 11 is one long side of the building 10. In addition, a staircase 13 that connects the passages 12 between the floors is provided on one short side of the building 10. In addition, the dwelling unit 11 on the other short side of the building 10 is provided with an expansion room 11B that projects to the passage 12 side. Further, the other long side surface of the building 10 is provided with a front projecting portion 10 </ b> A formed by slightly projecting a portion corresponding to the central two dwelling units 11 to the outside.

  Hereinafter, the side having the front projecting portion 10A in the building 10 is referred to as “front side” or “front side”, and the side having the passage 12 is referred to as “rear side” or “rear side”.

  As shown in FIG. 2, the building 10 is substantially plane symmetric in the column direction X except for the peripheral portion of the expansion room 11 </ b> B, and FIG. 3 shows the left half enlarged from the plane of symmetry. Yes.

  The frame of the building 10 is mainly composed of a plurality of H-shaped steel beams and columns. Further, all the beams are used in a state where a pair of flanges of H-shaped steel are opposed in the vertical direction, and the columns are all 1 The pair of flanges are used in a state where they face each other in the column direction X. In addition, in the column 30 </ b> A at the positions in front of both ends in the column direction X, a pair of H-shaped flanges face each other in the interbeam direction Y.

  As shown in FIG. 2, some of the plurality of beams continuously extend as the first beam 20 over the entire column direction X of the building 10. Here, “continuously extending” means that the first beam 20 extends continuously without being divided by the pillar, and the first beam 20 includes a plurality of H-section steels for convenience of conveyance. It connects by a well-known connection structure (refer FIG. 4).

  Specifically, the first beam 20 is arranged in the same way between the upper and lower ends of the building 10 and between each level, and the rear end that is at least a boundary with the passage 12 in the inter-beam direction Y of the dwelling unit 11, and the rear It is provided at a plurality of positions including an end position and a substantially central position. Further, the pillars 30 for each first beam 20 are arranged at a plurality of positions including at least both ends in the longitudinal direction of each first beam 20 and the boundary portion between the adjacent dwelling units 11 and 11. And as shown in FIG. 4, the joint structure which concerns on this invention is applied to the joint 19 in which the 1st beam 20 and the pillar 30 cross | intersect.

  6 to 9, the joint 19 in which the columns 30 and 30 are connected to the first beam 20 from above and below between the levels of the building 10 is shown in an enlarged manner. The size of the H-shaped steel of the column 30 and the H-shaped steel of the first beam 20 constituting the joint 19 between the layers is different. For example, the width of the web 32 of the column 30 is the same as that of the web 22 of the first beam 20. The width of the flange 31 of the pillar 30 is, for example, 70 to 90% larger than the width of the flange 21 of the first beam 20, as shown in FIG. Is doing well.

  A base plate 33 having a strip shape having substantially the same width as the flange 21 of the first beam 20 is overlapped and welded to the end face of the column 30. The length of the base plate 33 is 1.5 to 2.5 times (more specifically, approximately twice) the width of the flange 31 of the column 30 and extends in the longitudinal direction of the first beam 20. ing. As shown in FIG. 6, the thickness of the base plate 33 is about 2 to 5 times the thickness of the flange 21 of the first beam 20.

  The column 30 is arranged and welded at the center in the longitudinal direction and the width direction of the base plate 33. A pair of base projecting portions 34 and 34 according to the present invention is formed by portions of the base plate 33 that project from the column 30 to both sides.

  Reinforcing ribs 35 are erected from the center in the width direction of each base overhanging portion 34, and opposed ribs 36 are erected from the tip of the base overhanging portion 34. The opposing rib 36 is welded to the base projecting portion 34 in the shape of a square plate having substantially the same width as the flange 31 of the column 30 and faces the flange 31 in parallel. Further, the reinforcing rib 35 has a rectangular plate shape with the same height as the opposing rib 36 and is disposed in the same plane as the web 32 of the pillar 30, and the flange 31, the base overhanging portion 34, and the opposing rib of the pillar 30. It is welded to 36. The plate thickness of the opposing rib 36 is substantially the same as the plate thickness of the flange 31 of the column 30, and the plate thickness of the reinforcing rib 35 is substantially the same as the plate thickness of the web 32 of the column 30.

  The base plate 33 is fixed with a plurality of bolts B in a state of being entirely overlaid on the flange 21 of the first beam 20. For this purpose, a plurality of bolt insertion holes 37 are formed in the base plate 33 and the flange 21 of the first beam 20. As shown in FIG. 7, the bolt insertion holes 37 are arranged in two rows and two columns between the pillars 30 and the opposing ribs 36 with the reinforcing ribs 35 therebetween. In addition, between the flanges 31, 31 of the column 30, one is disposed on each side of the web 32 at a position near each flange 31. Then, four groups of three bolt insertion holes 37 in which two bolt insertion holes 37 outside the flange 31 and one bolt insertion hole 37 inside the flange 31 are aligned on the same straight line are formed. Yes.

  A contact plate 38 is assigned to the inner surface of the flange 21 of the first beam 20 for each group of bolt insertion holes 37. As shown in FIG. 6, the contact plate 38 has a length that fits between a beam connecting stiffener 23 and a reinforcing stiffener 24, which will be described later, so as to avoid welding beads, and the thickness of the plate 38 is the first beam 20. The thickness of the flange 21 is about 2 to 5 times the plate thickness. Furthermore, one group of bolt insertion holes 37 (that is, three bolt insertion holes 37) is formed in a row in each contact plate 38. Then, the contact plate 38 is directed to the inner surface of the flange 21 of the first beam 20, and the bolt B is passed through the bolt insertion hole 37 from the contact plate 38 side and screwed with the nut N. One beam 20 is fixed.

  Between the pair of flanges 21, 21 of the first beam 20, a total of four stiffeners 24 for reinforcement are provided on both sides of the web 22 of the first beam 20. The thickness of the reinforcing stiffener 24 is about 1.5 to 2 times the thickness of the flange 21 of the first beam 20. Then, as shown in FIG. 7, the reinforcing stiffener 24 is disposed in the first plane orthogonal to both longitudinal ends of the base plate 33, and the pair of flanges 21, 21 of the first beam 20, the web 22, (See FIG. 8). Moreover, as shown in FIG. 7, the opposing rib 36 and the stiffener 24 for reinforcement are arrange | positioned so that it may overlap partially seeing from an up-down direction. That is, the reinforcing stiffener 24 and the opposing rib 36 are disposed in substantially the same plane (corresponding to the “first plane” according to the present invention).

  As shown in FIG. 3, the second beam 25 orthogonal to the first beam 20 is formed in the joint 19 positioned at least at both ends of the building 10 in the row direction and the boundary portion between the adjacent dwelling units 11 and 11. It is connected. Such a joint 19 is provided with a beam connecting stiffener 23 between a pair of flanges 21, 21 of the first beam 20.

  As shown in FIG. 9, the beam connecting stiffener 23 has the same shape as the reinforcing stiffener 24 and fits in the flanges 21 and 21 of the first beam 20, and the first beam 20 of the main body 23H It consists of a connecting projection piece 23A extending from an intermediate portion in the vertical direction at the edge opposite to the web 22. In addition, a pair of bolt insertion holes 23B are provided on the connecting protrusion 23A so as to be arranged vertically. As shown in FIG. 7, the plate thickness of the beam connecting stiffener 23 is substantially the same as the plate thickness of the flange 21 of the first beam 20.

  The beam connecting stiffener 23 is disposed in a plane parallel to the flange 31 at the center of the pair of flanges 31, 31 of the column 30, and the pair of flanges 21, 21 of the first beam 20 and the web 22. It is welded in a state orthogonal to. A pair of bolt insertion holes 23 </ b> B is also formed in the web 27 at the end of the second beam 25. Then, the bolts are passed through the second beam 25 and the connecting protrusion 23A of the beam connecting stiffener 23 in a state where the connecting protrusion 23A of the beam connecting stiffener 23 is superimposed on the web 27 of the second beam 25 from one side. Thus, the second beam 25 is coupled to the beam coupling stiffener 23.

  As shown in FIG. 3, a brace 50 is provided at both ends of the building 10 in the row direction X and the boundary between adjacent dwelling units 11 and 11. The brace 50 is formed between the column 30 on the first beam 20 near the rear end of the dwelling unit 11 and the column 30 on the first beam 20 at the approximate center of the dwelling unit 11 and the first beam 20 at the approximate center of the dwelling unit 11. It is provided between the upper column 30 and the column 30 on the front side of the column 30.

  As shown in FIG. 5, the brace 50 includes an intermediate beam 51 that is passed to the center in the vertical direction of the columns 30, 30 that face each other in the inter-beam direction Y. The intermediate beam 51 is made of an H-shaped steel, and a pair of flanges of the H-shaped steel face each other in the vertical direction. Both ends of the intermediate beam 51 are bolted to a plate welded to the center in the width direction of the flange 31 of the column 30 or are welded to the flange 31 of the column 30.

  Connecting plates 54 are welded and protruded on both the upper and lower surfaces at two positions located between the longitudinal center and both ends of the intermediate beam 51. Further, a connecting plate 53 is fixed to a corner portion between the second beam 25 and the flange 31 and is disposed in the same plane as the connecting plate 54. As shown in FIG. 9, the connecting plate 53 is welded to the fixing plate 55 that is bolted in a state of being overlapped with the flange 26 of the second beam 25 and the flange 31 of the column 30. And as shown in FIG. 5, the connection bar 52 comprised with the channel material which inclines with respect to the up-down direction is passed between the connection board 53 and the connection board 54, and is bolted. The brace 50 is configured as described above.

  This is the end of the description of the structure of the joint 19 and the building 10 of the present embodiment. Next, the structure of these joints 19 and the effect of the building 10 will be described.

  As shown in FIG. 2, in this building 10, first beams 20 that extend in the entire row direction X are provided at a plurality of locations in the inter-beam direction Y, and the joints 19 of the first beams 20 and the columns 30 are provided. The present invention is applied to the structure. As a result, as will be described in detail below, the balance of the strength of the entire building 10 is improved, and it becomes even stronger against earthquakes.

  That is, in the structure of the joint 19 according to the present invention, as shown in FIG. 6, the reinforcing stiffener 24 provided between the pair of flanges 21, 21 of the first beam 20 is connected to the pair of flanges 31 of the column 30. , 31 are arranged in a pair of imaginary first planes that are separated from both sides. That is, the space between the reinforcing stiffeners 24, 24 in the longitudinal direction of the first beam 20 is wider than the conventional one in which the reinforcing stiffeners are disposed in the same plane as the pair of flanges of the columns. Thereby, the load which twists the pillar 30 can be received with the stiffener 24 for reinforcement arrange | positioned in the position away from the former with respect to the twist center, and twist strength improves. Further, even when a load is applied to bend the column 30 in the longitudinal direction X, the reinforcing stiffener 24 disposed at a position farther away from the bending center can be received, and the bending strength is improved.

  Here, various loads received by the first beam 20 from the column 30 are transmitted to the stiffener 24 for reinforcement via the flange 21 of the first beam 20. On the other hand, in the structure of the joint 19 according to the present embodiment, not only the space between the stiffeners 24, 24 for reinforcement is widened, but also the base plate 33 welded to the end face of the column 30 is provided on both sides of the column 30. Since the stiffener 24 for reinforcement is disposed in a pair of first planes orthogonal to the pair of base projecting portions 34, 34 by extending the pair of base projecting portions 34, 34, the first beam Of the 20 flanges 21, a portion between the reinforcing stiffeners 24 facing in the longitudinal direction of the first beam 20 is reinforced by the base plate 33. Moreover, the base overhanging portion 34 stands up from the tip thereof and opposes the side surface of the column 30, and the reinforcing rib communicates between the opposing rib 36, the base overhanging portion 34, and the side surface of the column 30. 35. Further, a contact plate 38 is applied to the inner surface of the flange 21 of the first beam 20 in a range extending inside and outside the flange 31 of the column 30, and the flange 21 of the first beam 20 is sandwiched between the contact plate 38 and the base plate 33. It is. As a result, an increase in the load on the flange 21 of the first beam 20 due to the expansion of the stiffener 24 for reinforcement can be suppressed. Further, in the joint 19 to which the second beam 25 is connected, the first beam 20 is also reinforced by the beam connecting stiffener 23 for connecting the second beam 25.

  As described above, in the structure of the joint 19 according to the present embodiment, the balance between the strength against the compression / tensile deformation of the first beam 20 caused by the load received from the column 30 and the strength against the bending / twist deformation is improved. Become stronger against. Further, in the building 10 having the structure of the joint 19, the number of the pillars 30 can be reduced as compared with the conventional structure, and the building 10 can be reduced in weight. be able to. Further, the strength of the building 10 with respect to the load facing the beam direction X is enhanced by the above-described joint 19 group, whereas the strength of the building 10 with respect to the load facing the inter-beam direction Y is enhanced by the brace 50. Therefore, this point also improves the balance of strength of the entire building 10 and makes it stronger against earthquakes.

[Second Embodiment]
FIG. 10 shows the structure of a joint 19A according to the second embodiment of the present invention. The joint 19A of the present embodiment eliminates the opposing rib 36 in the joint 19 of the first embodiment, and the reinforcing rib 35A has a triangular shape to connect the side surface of the column 30 and the base overhanging portion 34. Yes.

[Third Embodiment]
FIG. 11 shows the structure of the joint 19B according to the third embodiment of the present invention. The joint 19B is not provided with the beam connecting stiffener 23, and the contact plate 38A extends over substantially the entire area between the reinforcing stiffeners 24, 24. Further, in this joint 19B, the opposing rib 36B is disposed not at the tip of the base overhanging portion 34 but at an intermediate portion, and is orthogonal to the reinforcing rib 35B. The bolt insertion holes 37 are respectively arranged in four regions of the base projecting portion 34 that are partitioned by the reinforcing ribs 35B and the opposing ribs 36B.

[Fourth Embodiment]
FIG. 12 shows the structure of a joint 19C according to the fourth embodiment of the present invention. In the joint 19 </ b> C, a ceiling plate 39 </ b> A having the same width as the opposing rib 36 is overlapped and welded to the upper ends of the reinforcing rib 35 and the opposing rib 36. A stiffener 39B is disposed and welded between the flanges 31 of the column 30 in the same plane as the ceiling plate 39A. In consideration of the screwing operation of the bolt B and the nut N, the reinforcing rib 35 and the opposing rib 36 are higher than those in the first embodiment.

[Fifth Embodiment]
FIG. 13 shows the structure of a joint 19D according to the fifth embodiment of the present invention. The joint 19D includes a contact plate 38B having the same length as the base plate 33. Then, a pair of reinforcing stiffeners 24 and 24 and a beam connecting stiffener 23 are welded between the base plates 33 and 33 that are vertically opposed to each other to form a unit 19U. The unit 19U is a web 22 of the first beam 20. Are bolted together with the base plate 33 of the column 30 in a state of being fitted on both sides of the column 30.

[Sixth Embodiment]
FIG. 14 shows a structure of a building 10W according to the sixth embodiment of the present invention. In this building 10W, the first beam 20 extends continuously in the inter-beam direction Y, and the joint structure according to the present invention is applied to the joint 19 where the first beam 20 and the pillar 30 intersect. Further, a brace 50 is provided on the second beam 25 extending in the direction of the row of the building 10W. In FIG. 14, the portion corresponding to the first beam 20 is indicated by hatching.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) Instead of the brace 50 of the building 10 of the first embodiment, a configuration including a bearing wall may be adopted.

  (2) Moreover, as shown in FIG. 15, you may comprise so that the number of the braces 50 may reduce gradually toward the upper floor of the building 10. As shown in FIG.

  (3) Although the building 10 of the first embodiment includes the reinforcing rib 35 and the opposing rib 36, the reinforcing rib 35 and the opposing rib 36 are not provided on the base projecting portion 34. Also good.

DESCRIPTION OF SYMBOLS 10 Building 11 Dwelling unit 19,19A-19D Joint 20 First beam 21 Flange 22 Web 23 Beam stiffener 24 Stiffener for reinforcement 25 Second beam 26 Flange 27 Web 30 Column 31 Flange 32 Web 33 Base plate 34 Base overhang 35 , 35A, 35B Reinforcement ribs 36, 36B Opposing ribs 38, 38A, 38B Pad plate 50 Bracing X Cross-beam direction Y Inter-beam direction

Claims (11)

In the joint structure in which the base plate welded to the end face of the H-shaped steel column is overlapped and fixed to the flange of the H-shaped steel beam,
The base plate is provided with a pair of base projecting portions that project from both sides of the column and are fixed to the flange of the beam.
Between the pair of flanges of the beam, the reinforcement is located in a pair of fictitious first planes that are orthogonal to the pair of base overhangs and are spaced outward from the pair of flanges of the column. Joint structure with stiffeners for use.   The joint structure according to claim 1, wherein no stiffener is provided in an imaginary pair of second planes including the pair of flanges of the columns. An inner part and an outer part of the base plate with respect to the flange of the column are fixed to the flange of the beam by a plurality of bolts,
3. The support plate according to claim 2, further comprising a contact plate that is orthogonal to the second plane, is addressed to an inner surface of the flange of the beam, and sandwiches the flange of the beam with the base plate by tightening the plurality of bolts. Joint structure.   The joint structure according to any one of claims 1 to 3, further comprising a reinforcing rib that connects between the pair of base projecting portions and a side surface of the column.   The joint structure according to claim 4, further comprising an opposing rib that stands up from a tip portion of each of the base projecting portions and faces the side surface of the column and is connected to the reinforcing rib.   The joint structure according to claim 5, wherein the opposing rib is disposed in the first plane.   The said beam is pinched | interposed from the up-down direction by a pair of said pillar, The structure of the edge part by the side of the said beam of the pair of pillar is the same in any one of Claims 1 thru | or 6 The joint structure.   Between the pair of flanges of the beam, a beam connecting stiffener is provided in the center plane between the pair of flanges of the column, and the H-shaped steel beam different from the beam to which the column is connected The joint structure according to any one of claims 1 to 7, wherein the web is connected to the beam connecting stiffener. It is a building that is a multi-storey steel structure apartment house with multiple dwellings arranged in the direction of the beam
The first beam extending in a first direction which is one of the column direction or the inter-beam direction and having the plurality of joint structures according to any one of claims 1 to 8 is the other of the column direction or the inter-beam direction. A building with a plurality in the second direction. The first direction is a column direction;
Between the two dwelling units adjacent to both ends in the direction of crossing of the building,
The joint structure according to any one of claims 1 to 8,
A plurality of second beams extending between the first beams and extending between the first beams;
Bearing walls or braces placed on the second beam;
The building according to claim 9, further comprising: The first direction is an inter-beam direction,
A plurality of second beams extending in the column direction and passed between the first beams;
Bearing walls or braces placed on the second beam;
The building according to claim 9, further comprising:

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