JP2019173451A - Joint structure of column and beam - Google Patents

Abstract

To provide a joint structure of a column and a beam in which an outer diaphragm can be attached to a column without welding and which is excellent in stress transmission property in an earthquake.SOLUTION: An outer diaphragm 1 comprises divided diaphragms 2 divided into a plurality of parts. The divided diaphragm 2 includes a column plate 23 abutted to a column 5. Since the divided diaphragms 2 are fastened and fixed with each other via a connection member and joint surfaces of the divided diaphragms 2 are formed by tension joint portions 21 provided at both end portions of the column plate 23, only the column plate 23 of one of the divided diaphragms 2 is abutted to each column face of the column 5. A pair of vertically separated reinforcement plates 29, 29 are provided in the column plate 23 and the tension joint portions 21 provided at both end portions which face an outer wall 61. Connection members are provided between the pair of reinforcement plates 29, 29.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pillar-to-beam joint structure in which an H-shaped steel beam is joined to a pillar by an outer diaphragm.

  Conventionally, a diaphragm construction method is often applied to steel pipe columns constituting a building structure in order to reinforce and prevent deformation. The through diaphragm method, which is one of such diaphragm methods, is assembled by cutting a steel pipe column at the upper and lower flange positions of the H-shaped steel beam, and then inserting the diaphragm and welding it to the steel pipe column. The H-shaped steel beam is preliminarily cut out as a beam bracket for the portion to be joined to the steel pipe column, and is welded to the diaphragm through its upper and lower flanges, and is attached by welding the web to the skin plate of the steel pipe column. The beam bracket and the H-shaped steel beam attached to the diaphragm are joined to each other by high-strength bolt friction joining.

  In such a through-diaphragm method, in addition to the cutting process of the steel pipe column, a process of welding the diaphragm to the steel pipe column is added. In particular, in this welding and joining process, it is necessary to weld completely through the entire circumference of the steel pipe. For this reason, in addition to these cutting and welding processes, it is necessary to inspect the welded portion, and there is a problem in that the burden of work labor associated with production increases. In addition to this, a skilled welding engineer is required to ensure the quality of the welded portion. In addition, if the welded part is rejected in the nondestructive inspection, it is necessary to rework it, resulting in an excessive production cost and a long production period. In addition, the introduction of welding and cutting processes has increased the chances of using various devices, leading to an increase in energy consumption associated with production, which has had an adverse effect on the environment.

  Further, as a conventional diaphragm method, a high blade method (registered trademark) has been put into practical use. In this high blade method, two sets of cast steel integrated outer diaphragms (high blades) for the upper flange and the lower flange are inserted into the steel pipe column. Then, the upper and lower flanges of the H-shaped steel beam are fixed to each outer diaphragm by welding. In the H-shaped steel beam, a beam bracket for joining to the steel pipe column is cut out. The upper and lower flanges of the beam bracket are welded to the high blade, and the web of the beam bracket is welded to the rib plate attached to the column skin plate. The beam bracket and the H-shaped steel beam are joined to each other by high-strength bolt friction joining. In such high blades, various shapes and the like having excellent stress transferability have been studied.

  However, in this high blade method, the operation of inserting the high blade into the steel pipe column requires many steps, and the operation itself is often difficult. For this reason, a special insertion device for inserting the high blade into the steel pipe column may be required. In addition, in this high blade method, it is necessary to weld and join the high blade to the upper and lower flanges of the H-shaped steel beam. As described above, the manufacturing labor and cost are increased, and the construction period is prolonged. There was also.

  Further, as a conventional column beam joining method, a high-strength bolt tension joining method has been put into practical use. In such a construction method, a steel pipe column and an H-shaped steel beam are connected by split tee or high-strength bolt tension bonding via an end plate welded to the end surface of the H-shaped steel beam. Incidentally, when the split tee is used, the flange and the steel plate column skin plate are joined by high strength bolt tension joining, and the split tee web and the flange of the H-shaped steel beam are joined by high strength bolt friction joining. The web of the H-shaped steel beam is friction-joined with a rib plate attached to a steel pipe column as needed.

  However, in this high-strength bolt joint between the split tee or end plate and the steel pipe column, since the steel pipe column has a closed cross section, a lot of work labor is required for inserting and tightening the high-strength bolt. . One-side high-strength bolts that can be inserted from one direction have been put into practical use, but the bolts are expensive in the first place and have limited strength. In addition, there is a problem that a bolt control is required on the steel pipe column, and a special control device is required for positioning and ensuring accuracy.

  In addition, a technique in which the outer diaphragm is composed of a plurality of divided diaphragms is also disclosed (see, for example, Patent Document 1). However, even in the disclosed technique of Patent Document 1, since the split diaphragm employs a configuration in which the steel pipe column is joined by welding, as described above, the production labor and the production cost are increased, and the construction period is increased. There is also a problem that it will be prolonged.

  Similarly, Patent Document 2 discloses an example in which the outer diaphragm is configured by combining column beam joint hardware such as a split diaphragm. According to the technique disclosed in Patent Document 2, a method is adopted in which a beam-to-column joint is joined by a bolt without welding to a steel pipe column. In addition, the inside of the column beam joint metal is filled with a filler such as mortar resin, for example, to transmit stress by the adhesive force of the filler and the shear strength of the bolt. The technique disclosed in Patent Document 2 has an advantage that an increase in production labor and the like can be prevented by eliminating the need for welding work when attaching to a steel pipe column.

JP 2001-262699 A Japanese Unexamined Patent Publication No. 7-324380 JP 59-224740 A JP 2017-206823 A

  However, in the disclosed technique of Patent Document 2 described above, since a process of filling a filler such as a mortar resin is included, the production labor is increased correspondingly, and the material cost of the filler is required. There was a problem.

  In addition, it is inevitable that the so-called side pillars close to the outer wall and the outer diaphragms provided on the so-called corner pillars close to the corners of the outer wall protrude greatly toward the outer wall side rather than the column surface.

  In this regard, the disclosed technique disclosed in Patent Document 3 discloses an example of an outer diaphragm provided on a corner post. Moreover, in the disclosed technique of Patent Document 4, a technique for preventing interference in the outer diaphragm provided in the side column or the corner column in relation to the outer wall or the vertical trunk edge provided in the outer wall is disclosed.

  The disclosed technologies of Patent Documents 3 and 4 are a plurality of divided diaphragms having a column plate that is in contact with a column and a metal plate that extends in the horizontal direction in an outer diaphragm provided on a side column or a corner column. Is composed of a split diaphragm provided on the outer wall side without a beam being attached. The split diaphragm to which the beam is attached can be attached to the beam by increasing the projection length in the horizontal direction of the metal plate, and the split diaphragm provided on the outer wall side should reduce the projection length in the horizontal direction of the metal plate. Thus, it can be applied to side columns and corner columns.

  However, in the disclosure techniques of these Patent Documents 3 and 4, the split diaphragm provided on the outer wall side has a small protrusion length of the metal plate, so that the bending rigidity thereof is lower than the bending rigidity of the split diaphragm attached to the beam. Become. For this reason, when a compressive force directed in the horizontal direction acts on the column plate facing the outer wall, the column plate may be bent and deformed in a direction in which the tensile joints located at both ends of the column plate expand each other. In such a case, additional bending acts on the bolts that fasten and fix the split diaphragm provided on the outer wall side and the split diaphragm adjacent thereto. As a result, it is necessary to make the bolt for fastening and fixing the divided diaphragm provided on the outer wall side and the divided diaphragm adjacent to the divided diaphragm larger than the bolt for fastening and fixing between the divided diaphragms to which the beams are attached.

  Further, in the disclosed techniques of Patent Documents 3 and 4, the divided diaphragm has one metal plate extending in the horizontal direction. For this reason, when a bending moment from the beam acts on the split diaphragm, in addition to the above-described bending deformation of the column plate, the tensile joint of the split diaphragm provided on the outer wall side is bent out of plane toward the out-of-plane direction. There is. In such a case, an insulator reaction force acts on the bolt at the tensile joint. As a result, it is necessary to make the plate thickness of the tensile joint portion of the divided diaphragm provided on the outer wall side larger than the plate thickness of the tensile joint portion of the divided diaphragm attached to the beam.

  Accordingly, the present invention has been devised in view of the above-described problems, and the object of the present invention is to provide an outer diaphragm in a column-to-beam joint structure in which an H-shaped steel beam is joined to a column by an outer diaphragm. It can be attached to the pillar without using welding, can reduce production labor and production cost, can shorten the construction period, and also has excellent stress transmission performance during an earthquake, A column capable of suppressing the bending deformation of the column plate facing the outer wall and the out-of-plane bending deformation of the tensile joint located at both ends of the column plate in the outer diaphragm provided in the side column or the corner column; It is to provide a joint structure of beams.

  The column-beam junction structure according to the first aspect of the present invention is a column-beam junction structure in which an H-shaped steel beam is joined to a column by an outer diaphragm. The outer diaphragm is composed of a plurality of divided diaphragms. The diaphragm has a column plate abutted against the column, and the divided diaphragm arranged along the H-shaped steel beam among the plurality of divided diaphragms is attached to a flange of the H-shaped steel beam. In addition, a beam plate provided with the column plate at the end is fastened and fixed between the divided diaphragms via a joining member, and between the divided diaphragms by tensile joints provided at both ends of the column plate. By forming the joint surface, only the column plate in one of the divided diaphragms is brought into contact with each column surface of the column. A pair of reinforcing plates spaced apart in the vertical direction are provided on the column plate facing the outer wall and the tensile joints provided at both ends thereof, and the joining member is provided between the pair of reinforcing plates. It is characterized by.

  The column-beam junction structure according to a second aspect of the present invention is the columnar and beam junction structure according to the first aspect, wherein the junction member is provided in a plurality in the vertical direction apart from the tensile junction, and the column plate faces the outer wall and both ends thereof The tensile joint provided in the transmission plate is provided with a transmission plate between the plurality of joining members spaced in the vertical direction.

  According to a third aspect of the present invention, there is provided the column-to-beam joint structure according to the second aspect, wherein the reinforcing plate is provided with a first notch corresponding to a vertical trunk edge provided on the outer wall, and the transmission plate is provided with the vertical trunk edge. A second notch corresponding to the above is provided.

  In any one of the first to third inventions, the column-beam joint structure according to the fourth invention is an L-shape in plan view along the column, the column plate facing each outer wall constituting the corner. The columnar plate and the tensile joint provided at both ends thereof are provided with the reinforcing plate having an L shape in plan view.

  According to the present invention having the above-described configuration, the outer diaphragm can be installed in a stable state based on mechanical attachment means without performing welding joint to the steel pipe column. Based on the friction force exerted between the outer diaphragm and the outer diaphragm, it is possible to prevent the outer diaphragm from dropping due to gravity. In addition, in the event of an earthquake, it is possible to prevent the outer diaphragm from moving in a vertical direction due to a force acting in the vertical direction and moving significantly as a problem in terms of force transmission. In particular, since the outer diaphragm can be fixed to the steel pipe column without using welding, the work labor involved in the production can be reduced. In addition, labor costs necessary for maintaining the quality of welds and costs for various equipment such as inspection devices can be reduced, and the production period can be shortened. For this reason, construction with reduced energy consumption can be performed, and an environment-friendly joining method can be achieved. In addition, the step of filling a filling material such as mortar resin can be omitted, and the manufacturing labor and the manufacturing cost can be reduced.

  Moreover, according to this invention, it becomes possible to save the effort which cut | disconnects a steel pipe column like the conventional through-diaphragm construction method. Furthermore, according to the present invention, the web in the so-called H-shaped steel beam may be configured not to be directly joined between the steel pipe columns, and the beam bracket as in the prior art may not be provided between the web and the steel pipe columns. In such a case, the construction of the beam bracket, which was mainly used in the prior art, is no longer required, so the construction cost can be greatly reduced based on the reduction of production labor, and the construction period can be shortened. It becomes. Further, since the beam bracket is not necessary, it is not necessary to attach the beam bracket to the steel pipe column in advance, and it is possible to transport the steel pipe as it is, thereby improving transport efficiency. In addition, it is possible to ensure stable quality of the joint structure. Moreover, since it is set as the structure which does not weld, the necessity for considering the design for improving impact resistance etc. is also relieved considerably, Therefore It becomes possible to improve the freedom degree of design.

  Furthermore, according to the present invention, the pillar plate and the tensile joint portion of the divided diaphragm provided on the outer wall side are provided with a pair of reinforcing plates spaced apart in the vertical direction, and a joining member is provided between the pair of reinforcing plates. It is done. Thereby, even if a compressive force acts, in the divided diaphragm provided on the outer wall side, it is possible to suppress the bending deformation of the column plates in the direction in which the tensile joints expand from each other. For this reason, an additional bending can be suppressed to the joining member which clamped and fixed between the division | segmentation diaphragms in the tension joint part located in the both ends of the column plate which faces an outer wall. As a result, according to the present invention, the joining member that fastens and fixes the split diaphragm provided on the outer wall side and the split diaphragm adjacent to the split diaphragm is fastened and fastened between the split diaphragms arranged along the H-shaped steel beam. It is not necessary to make it larger than the member, and a joining member of the same standard can be used.

  Further, according to the present invention, the pillar plate and the tensile joint portion of the divided diaphragm provided on the outer wall side are provided with a pair of reinforcing plates spaced apart in the vertical direction, and a joining member is provided between the pair of reinforcing plates. Provided. Thereby, even if the bending moment from the H-shaped steel beam acts on the split diaphragm, the out-of-plane bending deformation of the split diaphragm provided on the outer wall side toward the out-of-plane direction can be suppressed. For this reason, the insulator reaction force which acts on the joining member which clamped and fixed between the division | segmentation diaphragms in the tension joint part located in the both ends of the column plate which faces an outer wall can be suppressed. As a result, according to the present invention, it is not necessary to make the plate thickness of the tensile joint portion of the split diaphragm provided on the outer wall side larger than the plate thickness of the tensile joint portion of the split diaphragm attached to the H-shaped steel beam. The plate thickness can be made the same.

It is a perspective view of the joined structure of a steel pipe column and a beam to which the present invention is applied. It is a plane sectional view of the joined structure of a steel pipe column and a beam to which the present invention is applied. It is a side view of the joined structure of a steel pipe column and a beam to which the present invention is applied. It is a top view of one division | segmentation diaphragm. It is a perspective view of one division | segmentation diaphragm. It is a top view of the division | segmentation diaphragm provided in the outer wall side. It is a perspective view of the division | segmentation diaphragm provided in the outer wall side. It is a figure for demonstrating an example of the joining method of the steel pipe pillar and beam to which this invention is applied. It is a figure for demonstrating the other joining method of the steel pipe pillar and beam to which this invention is applied. It is a figure which shows the bending moment M which acts with respect to an H-shaped steel beam when a seismic force acts in the joining structure to which this invention is applied. It is a figure which shows the transmission path | route of the tensile force transmitted to the beam plate in a division | segmentation diaphragm. It is a figure which shows the transmission path | route of the compressive force transmitted to the beam plate in a division | segmentation diaphragm. It is a figure which shows the example which applies a junction structure to the corner part in a building structure. It is a figure which shows the structural example of the division | segmentation diaphragm comprised by L shape by planar view. It is a figure which shows the example which provided the notch about the transmission plate in a division | segmentation diaphragm. It is a front view which shows the test body used for this test. (A) is sectional drawing which shows the division | segmentation diaphragm of a comparative example, (b) is sectional drawing which shows the division | segmentation diaphragm of the example of this invention. (A) is a front view which shows the loading condition of this test, (b) is a side view of (a). (A) is a figure which shows the relationship between the amount of opening deformation between each division | segmentation diaphragm of a comparative example, and a load, (b) is the figure which shows the relationship between the amount of opening deformation between each division | segmentation diaphragm of an example of this invention, and a load. FIG.

  Hereinafter, a steel pipe column and beam joint structure to which the present invention is applied will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a steel pipe column / beam joining structure 10 to which the present invention is applied, FIG. 2 is a plan sectional view thereof, and FIG. 3 is a side view thereof.

  In the steel tube column / beam joint structure 10 to which the present invention is applied, the outer diaphragm 1 is used to dispose the H-shaped steel beam 3 perpendicular to the column surface of the steel tube column 5. In particular, the present invention is specialized when the outer diaphragm 1 is provided on the steel pipe column 5 as a so-called side column close to the outer wall 61.

  The steel pipe column 5 is a steel pipe having a rectangular cross section and having a predetermined plate thickness, which is applied as a column for a building structure. The steel pipe column 5 plays a role of preventing the collapse and collapse of the building structure while supporting the weight of the building structure itself even in a large shake caused by a large earthquake. The steel pipe column 5 is a so-called side column provided at a position close to the outer wall 61. In the following embodiment, a case where the steel pipe column 5 has a rectangular cross section such as a square cross section, a rectangular cross section, etc. will be described as an example. The corner portion 5a in the steel pipe column 5 may be formed in an arc shape or may be substantially a right angle.

  The H-shaped steel beam 3 forms a framework of a building structure together with the steel pipe column 5, and includes a flange 31 (hereinafter also referred to as an upper flange 31) provided at the upper end of the web 32 and a lower end of the web 32. It consists of H-section steel which has the flange 33 (henceforth the lower flange 33) provided in this. The H-shaped steel beam 3 is attached via the outer diaphragm 1 so as to be orthogonal to the column surface of the steel pipe column 5. In the example of FIG. 1, a case is shown in which three H-shaped steel beams 3 are arranged at 90 ° intervals in three directions other than the direction facing the outer wall 61 with respect to the steel pipe column 5, but this is limited to this. It is not what is done. The H-shaped steel beam 3 is made plastic by yielding before the steel pipe column 5 even during a large stress action such as a large earthquake as will be described later, thereby preventing the steel pipe column 5 from being plasticized. Or by reducing it, it works to prevent the collapse of the building structure.

  As shown in FIG. 3, the outer diaphragm 1 is composed of a pair of upper and lower sides via an H-shaped steel beam 3. The upper outer diaphragm 1 is attached from the upper side of the upper flange 31, and the lower outer diaphragm 1 is attached from the lower side of the lower flange 33. The outer diaphragm 1 is configured by combining a plurality of divided diaphragms 2. That is, in a plan view, the outer diaphragm 1 is arranged so as to surround the periphery of the steel pipe column 5 by the divided diaphragm 2. The outer diaphragm 1 is premised on the use of steel, stainless steel, cast steel, spheroidal graphite cast iron or the like, but is not limited thereto, and any other metal such as an aluminum alloy other than steel is used. You may do it.

  Further, the divided diaphragm can be a factory welded assembly product that has been subjected to strict welding quality control.

  The divided diaphragms 2 function as one outer diaphragm 1 by being combined with each other. In this Embodiment, it has the division | segmentation diaphragm 2a each attached to three H-shaped steel beams among this division | segmentation diaphragm 2, and the division | segmentation diaphragm 2b provided in the outer wall 61 side.

  4 is a plan view of one divided diaphragm 2a, and FIG. 5 is a perspective view thereof. The split diaphragm 2 a has a beam plate 22 that is in contact with the upper flange 31 or the lower flange 33 in the H-shaped steel beam 3 and a column plate 23 that is in contact with the steel pipe column 5.

  The beam plate 22 has a bolt hole 127 drilled in advance for bolting with the upper flange 31 or the lower flange 33 in the H-shaped steel beam 3. In this beam plate 22, when the longitudinal direction of the H-shaped steel beam 3 is C, a plurality of bolt holes 127 are provided along the longitudinal direction C and the width direction.

  The beam plate 22 has a straight front end 22a and a side end 22b whose diameter is expanded from the front end 22a. The side end 22b may be formed with a rib (not shown) formed in a convex shape upward and / or downward. The width in the W direction of the front end portion 22 a of the beam plate 22 may be substantially the same as the width in the W direction of the upper flange 31 or the lower flange 33 of the H-shaped steel beam 3. In any case, one beam plate 22 is sized so as to be able to join only one upper flange 31 or one lower flange 33 in the H-shaped steel beam 3. In other words, the beam plates in the two or more divided diaphragms 2 adjacent to each other with respect to one upper flange 31 or one lower flange 33 are not joined. Note that the side end 22b of the beam plate 22 may have any other enlarged diameter shape.

  Further, the contact surface of the beam plate 22 with the flanges 31 and 33 is subjected to a high friction coefficient treatment as necessary. In this high friction coefficient increasing process, a metal spraying process, an inorganic zinc rich coating process, or the like is appropriately selected. Alternatively, a thin metal plate that has been processed with a high friction coefficient may be inserted between the beam plate 22 and the flanges 31 and 33.

  Such a beam plate 22 is attached to each of the H-shaped steel beams 3 arranged at intervals of 90 ° in plan view.

  The column plate 23 is provided at the end of the beam plate 22 in the C direction. The width in the W direction of the column plate 23 is configured to be wider than the width in the W direction at the front end portion 22 a of the beam plate 22. In other words, the beam plate 22 is gradually expanded in diameter from the front end portion 22 a and reaches the column plate 23. The plate surface of the column plate 23 extends in a direction perpendicular to the plate surface of the beam plate 22. The width in the W direction of the column plate 23 is substantially the same as the width of each column surface in the steel pipe column 5. Further, as shown in FIG. 5, the column plate 23 includes an upper column plate portion 23a extending upward from the end portion of the beam plate 22 and a lower column plate extending downward from the end portion of the beam plate 22. And a portion 23b. The column plate 23 can be fixed by being brought into contact with the surface of the steel pipe column 5. The column plate 23 may be configured by only one of the upper column plate portion 23a and the lower column plate portion 23b.

  Further, the column plate 23 may be subjected to a non-slip treatment on the contact surface with the steel pipe column 5 as necessary. As the anti-slip process, a blast process, a coating process, a metal spray process, a concavo-convex process by knurling or cutting, and the like are appropriately selected.

  At both ends of the column plate 23, tensile joints 21 are provided. When the split diaphragm 2 is formed using a steel plate, the column plate 23 and the tensile joint 21 may be formed by bending a steel plate integrated with each other, or separate steel plates may be used. You may make it join through welding etc. The bending angle θ1 of the tensile joint 21 located between the adjacent divided diaphragms 2a is extended in a direction bent approximately 45 ° from the extending direction (W direction) of the column plate 23 in plan view. When adjacent to the tensile joint 21 in the divided diaphragm 2b, the bending angle θ1 may be configured at any angle, for example, about 45 °, for example, 70 ° to 80 °. May be. In the tensile joint portion 21, the beam plate 22 that is gradually expanded in diameter from the front end portion 22a is continuous from the lower side. The tensile joint portion 21 may include an upper tensile joint portion 21 a that extends upward from the beam plate 22 and a lower tensile joint portion 21 b that extends downward from the beam plate 22. These tensile joint portions 21 are provided with two penetrating bolt holes 126 spaced apart in the vertical direction. The bolt hole 126 may be provided for each of the upper tensile joint 21a and the lower tensile joint 21b when the tensile joint 21 is constituted by the upper tensile joint 21a and the lower tensile joint 21b. . The bolt holes 126 may be provided in a plurality of three or more apart in the vertical direction.

  In addition, the tension | tensile_strength junction part 21 may differ in the plate | board plate 23 and its plate | board thickness, and the extension length to an upper direction and a downward direction may differ.

  Incidentally, the surface of the column plate 23 is substantially perpendicular to the surface of the beam plate 22. At this time, when the corner portion at the joint portion between the column plate 23 and the beam plate 22 is substantially vertical, stress is concentrated on the corner portion. From the viewpoint of avoiding stress concentration at the corner, R may be provided at the corner.

  6 is a plan view of one divided diaphragm 2b, and FIG. 7 is a perspective view thereof. The split diaphragm 2b includes a transmission plate 28 having a plane substantially the same height as the beam plate 22 described above, a column plate 23 abutting against the steel pipe column 5, and tensile joints provided at both ends of the column plate 23. 21 and a pair of reinforcing plates 29, 29 arranged substantially parallel to the transmission plate 28.

  Since the transmission plate 28 is not joined to the upper flange 31 or the lower flange 33 in the H-shaped steel beam 3, no bolt hole is provided in particular. The transmission plate 28 is provided at the column plate 23 and the tensile joints 21 provided at both ends thereof. The protruding length of the transmission plate 28 in the C direction may be substantially the same as or shorter than that of the tensile joint 21. However, the transmission plate 28 may protrude in the C direction from the tensile joint 21, but the protrusion length is preferably as small as possible.

  The transmission plate 28 is provided between two bolt holes 126 spaced apart in the vertical direction when two bolt holes 126 of the tensile joint portion 21 are spaced apart in the vertical direction. When three or more bolt holes 126 of the tensile joint portion 21 are provided apart in the vertical direction, the transmission plate 28 may be provided between any two bolt holes 126. A transmission plate 28 may be provided between the respective 126.

  The column plate 23 provided on the transmission plate 28 is provided at an end portion in the C direction of the transmission plate 28. The plate surface of the column plate 23 extends in a direction perpendicular to the plate surface of the transmission plate 28. From the viewpoint of avoiding stress concentration at the corner formed between the column plate 23 and the transmission plate 28, R may be provided at the corner.

  The bending angle θ2 with respect to the extending direction (W direction) of the column plate 23 in the extending direction of the tensile joint portion 21 may be any angle. For example, in the form shown in FIG. Consists of less than. This angle θ2 is preferably 10 to 20 °. Incidentally, the bending angle θ2 of the tensile joint portion 21 in the divided diaphragm 2b is adjusted in relation to the bending angle θ1 of the tensile joint portion 21 in the adjacent divided diaphragm 2a. That is, the bending angle θ2 is adjusted to be approximately 90 ° −θ1.

  When the projection length of the transmission plate 28 in the C direction is set to be equal to or less than the tensile joint portion 21, the projection length itself of the transmission plate 28 in the C direction itself is reduced by reducing the bending angle θ2 with respect to the W direction at the tensile joint portion 21. Can also be reduced. The transmission plate 28 may be omitted.

  The outer shape of the reinforcing plate 29 is substantially equal to the outer shape of the transmission plate 28. Since the reinforcing plate 29 is not joined to the upper flange 31 or the lower flange 33 in the H-shaped steel beam 3, no bolt hole is particularly provided. The reinforcing plate 29 is provided on the column plate 23 and the tensile joints 21 provided at both ends thereof. The protruding length of the reinforcing plate 29 in the C direction may be substantially the same as or shorter than that of the tensile joint 21. Further, the protruding length of the reinforcing plate 29 may be substantially equal to the protruding length of the transmission plate 28. The reinforcing plate 29 may protrude in the C direction from the tensile joint portion 21, but the protruding length is preferably as small as possible.

  The reinforcing plate 29 is provided as a pair on both sides of the bolt hole 126 of the tensile joint 21 in the vertical direction. As shown in FIG. 7, when two bolt holes 126 of the tensile joint portion 21 are provided apart in the vertical direction, a pair of reinforcing plates 29, 29 are provided on both sides with the two bolt holes 126 sandwiched in the vertical direction. Will be provided. That is, two bolt holes 126 spaced in the vertical direction are provided between the pair of reinforcing plates 29 and 29. Of course, when the bolt holes 126 are provided in a plurality of three or more, a plurality of bolt holes 126 separated in the vertical direction may be provided between the pair of reinforcing plates 29.

  The reinforcing plate 29 includes a reinforcing plate 29a provided at the upper end of the upper tensile joining portion 21a and a reinforcing plate 29b provided in the lower tensile joining when the tensile joining portion 21 includes the upper tensile joining portion 21a and the lower tensile joining portion 21b. You may provide in the lower end of the part 21b. The upper tensile joint portion 21a may protrude further upward than the reinforcing plate 29a, and the lower tensile joint portion 21b may protrude further downward than the reinforcing plate 29b.

  The column plate 23 provided on the reinforcing plate 29 is provided at the end of the reinforcing plate 29 in the C direction. The plate surface of the column plate 23 extends in a direction perpendicular to the plate surface of the reinforcing plate 29. From the viewpoint of avoiding stress concentration at the corner formed between the column plate 23 and the reinforcing plate 29, R may be provided at the corner.

  Note that, in the divided diaphragm 2b, a transmission plate 28 and a reinforcing plate 29 made of a metal plate may be attached to the column plate 23 and the tensile joint portion 21 formed by bending the metal plate by welding. Further, the split diaphragm 2b may be formed with the column plate 23, the tensile joint portion 21, the transmission plate 28, and the reinforcing plate 29 by pouring heated metal into the mold.

  Next, when one outer diaphragm 1 is configured by combining the divided diaphragms 2a and 2b having the above-described configuration, for example, as shown in FIG. 8, four divided diaphragms 2a and 2b are disposed around the steel pipe column 5. Arrange. At this time, the column plates 23 of the divided diaphragms 2 a and 2 b are brought into contact with the column surface of the steel pipe column 5. As described above, since the width in the W direction of the column plate 23 is substantially the same as the width of each column surface in the steel pipe column 5, each column surface of the steel tube column 5 is just in the one divided diaphragm 2. Only the column plate 23 comes into contact. As a result, the column plates 23 of the two or more divided diaphragms 2a and 2b are not brought into contact with one column surface of the steel pipe column 5.

  Further, the tensile joint portion 21 as a joint surface between the adjacent divided diaphragms 2 is configured to be positioned in the vicinity of the corner portion 5 a of the steel pipe column 5.

  As described above, the tensile joint portions 21 are formed at both ends of the column plate 23 in the W direction. Since the width of the column plate 23 in the W direction is substantially the same as the width of each column surface of the steel pipe column 5, the tensile joints 21 positioned at both ends of the column plate 23 in the W direction are corners of the steel tube column 5. It will be located in the vicinity of the part 5a.

  In addition, each tensile joint 21 between the adjacent divided diaphragms 2a is extended from the extending direction (W direction) of the column plate 23 in a plan view to a direction bent in a direction of approximately 45 ° in a plan view. The tensile joints 21 between the diaphragms 2 are substantially parallel to each other. Further, the tensile joint 21 in the divided diaphragm 2a and the tensile joint 21 in the divided diaphragm 2b adjacent thereto are substantially parallel to each other when the bending angle θ2 is 90 ° −θ1.

In this abutment stage, the space between the tensile joints 21 in the divided diaphragms 2 adjacent to each other is formed. In the present invention, at least the interval e (e ₁ , e ₂ , e ₃ , e ₄ ) is designed to satisfy e ≧ 0.

  Next, the outer diaphragm 1 is attached. In the joining between the adjacent divided diaphragms 2a and 2b, the bolt 25 is inserted into the bolt hole 126 formed in the tensile joint portion 21 positioned in parallel to each other, and the screw portion of the bolt 25 is fastened and fixed by the nut 26. When the bolts 25 and nuts 26 are tightened, the adjacent divided diaphragms 2 a and 2 b gradually approach each other via the tensile joint 21. Then, at the stage where the bolts 25 and 26 are completely tightened, the tensile joint portions 21 of the adjacent divided diaphragms 2a and 2b come into contact with or approach each other, and e described above is reduced. At this time, as long as e is reduced, e is of course 0, but e> 0, so that the divided diaphragms 2 may be non-contact with each other.

  As shown in FIG. 1, the divided diaphragms 2 a and 2 b are fastened and fixed via bolts 25 and nuts 26. A pair of reinforcing plates 29 and 29 spaced apart in the vertical direction are provided on the column plate 23 and the tensile joint portion 21 of the divided diaphragm 2 b, and a bolt 25 and a nut 26 are provided between the pair of reinforcing plates 29 and 29. It will be. Furthermore, the transmission plate 28 is provided between the two bolts 25 and the nut 26 that are separated in the vertical direction in the column plate 23 and the tensile joint portion 21 of the divided diaphragm 2b.

  Next, the outer diaphragm 1 and the H-shaped steel beam 3 are attached. Bolts 41 are inserted through bolt holes 127 formed in the beam plate 22 in the divided diaphragm 2a. At this time, bolt holes (not shown) are also formed in advance in the upper flange 31 or the lower flange 33 to be attached to the beam plate 22, and the bolt holes 127 are inserted through these bolt holes 127. Further, the nut 42 is screwed onto the screw portion of the bolt 41 protruding from the flanges 31 and 33 and tightened. Thereby, the beam plate 22 and the flanges 31 and 33 in the H-shaped steel beam 3 are firmly attached and fixed to each other. In addition to the case where the split diaphragm 2 and the H-shaped steel beam 3 are joined by such bolt joining, the end of the beam plate 22 and the ends of the flanges 31 and 33 of the H-shaped steel beam 3 are butted against each other and welded. You may make it fix by doing. Further, the beam plate 22 and the flanges 31 and 33 may be overlapped with each other and fixed by fillet welding, or may be replaced by any other joining means.

  The operation of attaching the H-shaped steel beam 3 to the divided diaphragm 2b is not particularly performed. However, it is assumed that the divided diaphragm 2b is provided at a position where the column plate 23 faces the outer wall 61 as shown in FIG. The outer wall 61 is provided with a vertical body edge 62 on the inner side thereof, and the transmission plate 28 and the reinforcing plate 29 adjacent to the vertical body edge 62 have a small protruding length in the C direction as described above. For this reason, the vertical body edge 62 does not interfere with the transmission plate 28 and the reinforcing plate 29. As a result, it is possible to design the steel pipe column 5 as close as possible to the outer wall 61.

  As described above, one beam plate 22 has a size that can be joined only to one upper flange 31 or one lower flange 33. That is, one beam plate 22 and one upper flange 31 or one lower flange 33 have a one-to-one correspondence with each other. Therefore, as shown in FIG. 9, the beam plate 22 can be bolted to the upper flange 31 or the lower flange 33 in the H-shaped steel beam 3 in advance. That is, after integrating the divided diaphragm 2 on the H-shaped steel beam 3 in advance, these may be brought into close contact with the steel pipe column 5 in the direction of the arrow in the figure. Thereby, the construction of the joint structure 10 is simplified, and a rapid construction can be realized. In addition to this, according to the present invention, it is possible to integrate the split diaphragm 2 into the H-shaped steel beam 3 in advance in the factory, and transport it to the site in that state for attachment. It is also possible to improve the efficiency of on-site construction.

  As described above, in the present invention, the joining between the divided diaphragms 2a and 2b is performed based on only a so-called mechanical joining member such as a bolt without using any welding joining. Incidentally, any other joining member may be used as an alternative to joining with the bolts 25 and 41.

  The joining between the divided diaphragms 2a and 2b and the joining of the beam plate 22, the upper flange 31 and the lower flange 33 may be performed in any order.

  By performing the joining so as to reduce the distance e between the divided diaphragms 2a and 2b in this way, a pushing force from the outer diaphragm 1 constituting the divided diaphragm 2 toward the steel pipe column 5 acts. This pushing force is transmitted from the column plate 23 in the divided diaphragm 2 to the column surface in the steel pipe column 5. As a result, by making the contact pressure between the column plate 23 and the steel pipe column 5, it is possible to exert a strong frictional force between the contact surfaces. As a result, the outer diaphragm 1 can be installed in a stable state without performing welding joint to the steel pipe column 5, and can be prevented from falling based on gravity or the like. In particular, since the outer diaphragm 1 can be fixed to the steel pipe column 5 without using welding, it is possible to reduce the work labor involved in the production. In addition, labor costs necessary for maintaining the quality of welds and costs for various equipment such as inspection devices can be reduced, and the production period can be shortened. For this reason, construction with reduced energy consumption can be performed, and an environment-friendly joining method can be achieved.

  Moreover, according to the present Example, it becomes possible to save the labor which cuts a steel pipe column like the conventional through-diaphragm construction method. Furthermore, according to the present embodiment, the web 32 in the so-called H-shaped steel beam 3 is not directly joined to the steel pipe column 5, and no beam bracket as in the prior art is provided between the web 32 and the steel pipe column 5. It is configured. In this case, since the configuration of the beam bracket in the prior art becomes unnecessary, it is possible to greatly reduce the construction cost based on the reduction of the production labor, and the construction work period can be shortened. Further, since the beam bracket is not necessary, it is not necessary to attach it to the steel pipe column 5 in advance, and it can be transported in the state of the steel pipe, so that the transportation efficiency can be improved. Moreover, since it is set as the structure which excluded welding as much as possible, it becomes easy to ensure the stable quality of the joining structure 10. FIG.

  In addition, according to the present embodiment, although the above-described effect is diminished, a configuration in which a shear plate as in the prior art or a member for preventing slippage may be provided between the web 32 and the steel pipe column 5 is possible. Of course.

  In the joint structure 10 to which the present invention configured as described above is applied, when an earthquake force acts, a bending moment M acts on the H-shaped steel beam 3 as shown in FIG. When such a bending moment M acts on the H-shaped steel beam 3, this is converted into the axial force of the flanges 31 and 33, and this axial force propagates through the flanges 31 and 33. The axial force propagating through the flanges 31 and 33 becomes a tensile force T in the joint structure 10 as shown in FIG. 11 and a compressive force P as shown in FIG. 12 according to the direction of the bending moment.

  When the bending moment M as described above is applied, if a tensile force is applied to the upper flange 31, a compressive force is applied to the lower flange 33. Further, when a compressive force is applied to the upper flange 31, a tensile force is applied to the lower flange 33.

  Here, when the tensile force T based on the axial force acts in the joint structure 10, the tensile force T is first transmitted through the flange 31 (33) in the H-shaped steel beam 3. The tensile force T from the flange 31 (33) is transmitted to the beam plate 22 in the split diaphragm 2. As a result of the beam plate 22 being pulled in the vector direction of the tensile force T in FIG. 11, the column plate 23 connected thereto is also pulled in that direction. Incidentally, in this embodiment, the steel pipe column 5 and the column plate 23 are merely brought into contact with each other, and are not directly coupled through other coupling means or welding joints. For this reason, the tensile force T does not act directly on the steel pipe column 5 via the beam plate 22 and the column plate 23.

The tensile force T transmitted to the beam plate 22 in the divided diaphragm 2, so that the transmitted force T _a in Figure 11, into the path of T _b. That is, the forces T _a and T _b are transmitted via the column plate 23 and the tensile joint portion 21 so as to bypass the steel pipe column 5. And this is transmitted to the division | segmentation diaphragm 2 which has the column plate 23 provided in the beam plate 22 to which the original tensile force T has been transmitted, and the other column plate 23 which faces through the steel pipe column 5. FIG.

At this time, since the beam plate 22 has a shape that gradually increases in diameter from the front end portion 22a and reaches the column plate 23, the transmission path of the forces T _a and T _b can be made wider and smooth. Stress transmission is possible. As a result, the path through which the forces T _a and T _b are transmitted is not locally narrowed or bent sharply, and the stress concentration can be kept small. It is also possible to ensure the structural stability of the joint structure 10 itself.

The column plate 23 provided on the beam plate 22 to which the initial tensile force T has been transmitted and the column plate 23 facing each other via the steel pipe column 5 are exactly the same as those shown in FIG. 11 based on the transmitted stress. C _c acts toward the steel pipe column 5. This force C _c is in the same direction as the tensile force T transmitted from the beam plate 22 and becomes a compressive force C _c acting from the received column plate 23 toward the steel pipe column 5. That is, the tensile force T is converted into a compressive force C _{c that} acts on the steel pipe column 5 from the facing column plate 23. The facing column plate 23 and the steel pipe column 5 are fastened and fixed, but in addition to this, a compressive force _Cc is further applied.

As described above, according to this embodiment, the steel pipe column 5 and the column plate 23 are simply brought into contact with each other, so that the tensile force T is directly applied to the steel tube column via the beam plate 22 and the column plate 23. 5 so as not to act on, whereas the tensile force T of the minute becomes possible to propagate to another, and is capable converted to compressive force C _c at the dividing diaphragm 2 which ultimately face.

Further, when the (force T _b is applied to the tensile junction 21 of the split diaphragm 2b) the compressive force C _c action as shown in FIG. 11, in a direction pulling the joint 21, 21 of the division diaphragm 2b spreads to each other The column plate 23 of the divided diaphragm 2b tends to be bent and deformed. At this time, the pillar plate 23 and the tensile joint portion 21 of the divided diaphragm 2b are provided with a pair of reinforcing plates 29 and 29 that are spaced apart in the vertical direction. Bolts 25 and nuts 26 are provided. Thereby, a pair of reinforcement plates 29 and 29 resist the bending deformation of the column plate 23 of the divided diaphragm 2b.

  When the compressive force P based on the axial force acts on the joint structure 10, the compressive force P is first transmitted through the flange 31 (33) in the H-shaped steel beam 3 as shown in FIG. 12. The compressive force P from the flange 31 (33) is transmitted to the beam plate 22 in the split diaphragm 2. As a result of the beam plate 22 being pressed in the vector direction of the compressive force P in the figure, the column plate 23 connected thereto is also pressed in that direction. The column plate 23 and the steel pipe column 5 are fastened and fixed to each other, but in addition to this, a compressive force P is further applied.

  In this way, the joining structure 10 to which the present invention is applied transmits the tensile force T and the compressive force P directly to the steel pipe column 5 as the tensile force regardless of whether the tensile force T or the compressive force P is applied via the beam plate 22. Instead, it can be transmitted as a compression force. For this reason, even when the bending moment M in any direction is loaded on the H-shaped steel beam 3 based on the seismic force, it can be transmitted to the steel pipe column 5 as a compressive force.

  Further, when the bending moment M from the H-shaped steel beam 3 acts on the split diaphragm 2, the tensile joint portion 21 of the split diaphragm 2b tends to be bent out of plane toward the out-of-plane direction. At this time, in this embodiment, the pillar plate 23 and the tensile joint portion 21 of the divided diaphragm 2b are provided with a pair of reinforcing plates 29 and 29 spaced apart in the vertical direction, and between the pair of reinforcing plates 29 and 29. A bolt 25 and a nut 26 are provided as joining members. As a result, the pair of reinforcing plates 29, 29 resists out-of-plane bending deformation toward the out-of-plane direction of the tensile joint portion 21 of the split diaphragm 2b.

  In this embodiment, since only the compressive force is applied to the steel pipe column 5, the steel pipe column 5 to which the compressive force is applied stays in the substantially elastic deformation region without large out-of-plane deformation at the joint portion. It will be a thing. As a result, it becomes possible to prevent plasticization due to a tensile force being applied to the steel pipe column 5. Moreover, while preventing the plastic deformation of the steel pipe column 5, it is possible to prevent collapse of the building structure by first plasticizing the H-shaped steel beam 3 to which a tensile force is applied. For this reason, in order to prevent plastic deformation of the steel pipe column 5, it is not necessary to increase the plate thickness of the steel pipe column 5, which leads to reduction of the material cost of the steel material.

In the present embodiment, a tensile force T acts on the column plate 23 as shown in FIG. 11, as a result of intensified in minute compression force C _c, and can be suitably exerted frictional force therebetween Become. As a result, it is possible to prevent the outer diaphragm 1 from falling based on the gravity or the like.

In the present embodiment, the pillar plate 23 and the tensile joint portion 21 of the divided diaphragm 2 b are provided with a pair of reinforcing plates 29 and 29 that are spaced apart in the vertical direction, and a joining member is provided between the pair of reinforcing plates 29 and 29. The bolt 25 and the nut 26 are provided. As a result, as shown in FIG. 11, even if the compressive force C _c acts (the force T _b acts on the tensile joint 21 of the divided diaphragm 2b), the tensile joint 21 in the divided diaphragm 2b provided on the outer wall 61 side. , 21 can be prevented from being bent and deformed in the direction in which the column plates 23 expand from each other. For this reason, it can suppress that an additional bending acts on the volt | bolt 25 which clamped and fixed between the division | segmentation diaphragms 2a and 2b in the tension | bonding junction part 21 located in the both ends of the column plate 23 which faces the outer wall 61. FIG. . As a result, in this embodiment, the bolt 25 for fastening and fixing between the divided diaphragm 2b and the adjacent divided diaphragm 2a is fixed to the bolt 25 for fixing and fixing between the divided diaphragms 2a and 2a arranged along the H-shaped steel beam 3. It is not necessary to make it larger than 25, and the bolt 25 of the same standard can be used.

  Further, in this embodiment, the pillar plate 23 and the tensile joint portion 21 of the divided diaphragm 2b are provided with a pair of reinforcing plates 29 and 29 that are spaced apart in the vertical direction, and between the pair of reinforcing plates 29 and 29, A bolt 25 and a nut 26 are provided as joining members. Thereby, even if the bending moment M from the H-shaped steel beam 3 acts on the split diaphragm 2 provided on the outer wall 61 side, the out-of-plane bending deformation in which the tensile joint portion 21 of the split diaphragm 2b goes in the out-of-plane direction is suppressed. be able to. For this reason, it is possible to suppress the insulator reaction force from acting on the bolt 25 that has fastened and fixed between the divided diaphragms 2 a and 2 b at the tensile joints 21 positioned at both ends of the column plate 23 facing the outer wall 61. As a result, it is not necessary to make the plate thickness of the tensile joint portion 21 of the divided diaphragm 2b larger than the plate thickness of the tensile joint portion 21 of the divided diaphragm 2a, and these can be made the same.

  Furthermore, in this embodiment, two bolts 25 and nuts 26 as the joining members are provided in the tensile joint portion 21 of the divided diaphragm 2b so as to be vertically separated, and the column plate 23 facing the outer wall 61 and its tensile joint portion. 21 is provided with a transmission plate 28 between two bolts 25 and a nut 26 which are spaced apart in the vertical direction. Thereby, the bending deformation of the column plate 23 of the split diaphragm 2b toward the direction in which the tensile joints 21 and 21 of the split diaphragm 2b expand from each other, and the out-of-plane bending deformation of the split diaphragm 2b toward the out-of-plane direction of the tensile joint 21. , Can be more effectively suppressed.

  Further, according to the present embodiment, the tensile joint portion 21 is extended from the extending direction (W direction) of the column plate 23 in plan view to the direction bent in the direction of the range of the angles θ1 and θ2 described above in plan view. . For this reason, even when the ends of the flanges 31 and 33 in the H-shaped steel beam 3 are brought close to the steel pipe column 5, the flanges 31 and 33 are separated from the tensile joint 21 and interfere with each other. Disappears. Similarly, joint members such as bolts 25 and nuts 26 that fasten the tensile joints 21 that are brought into contact with each other are also separated from the flanges 31 and 33 that are close to the steel pipe column 5 and may interfere with each other. Disappear.

  For this reason, according to the present embodiment, the H-shaped steel beam 3 can be brought closer to the column surface of the steel pipe column 5. The load acting on the outer diaphragm 1 is reduced based on the bending moment of the H-shaped steel beam 3 shown in FIG. 10 by bringing the H-shaped steel beam 3 closer to the column surface of the steel pipe column 5. Can do. As a result, the plate thickness of each plate constituting the outer diaphragm 1 can be reduced, so that the degree of design freedom increases, and as a result, the manufacturing cost of the outer diaphragm 1 as a member can be kept low.

  Moreover, although this invention assumes the case where the H-shaped steel beam 3 is attached to a steel pipe column 5 as a side column in a T shape in a plan view, from the viewpoint of taking a wider room in a building structure, In some cases, the H-shaped steel beam 3 is shifted from the center of the steel pipe column 5. Accordingly, the divided diaphragms 2a do not have a uniform shape, and can be easily handled by decentering the position of the bolt hole 127 toward the outer wall 61 side.

  In addition to this, in the present invention, with respect to the divided diaphragm 2b, the joint surfaces m (see FIGS. 1 and 2) of the tensile joint portions 21 located at both ends of the column plate 23 facing the outer wall 61 are in the plan view. 23 with respect to the extension direction W of more than 0 ° and less than 45 °. As a result, the transmission plate 28 provided in the column plate 23 and the tensile joints 21 provided at both ends thereof is directed in the C direction when the protruding length in the C direction is assumed to be substantially the same as that of the tensile joint 21. It is possible to reduce the protruding length of the. As a result, the steel pipe column 5 can be brought as close as possible to the outer wall 61 side without the transmission plate 28 interfering with the vertical trunk edge 62 of the outer wall 61, and the room of the building structure can be taken wider. .

  FIG. 13 shows an example in which the steel pipe column 5 is applied to a corner column at a position closest to the corner of the outer wall 61. In such a case, two H-shaped steel beams 3 are attached to the steel pipe column 5 in an L shape in plan view using the above-described split diaphragm 2a. Of the peripheral surfaces constituting the steel pipe column 5, the divided diaphragm 2c is brought into contact with the surface to which the H-shaped steel beam 3 is not attached, in other words, the surface facing the outer wall 61.

  FIG. 14 is a perspective view of the split diaphragm 2c. The divided diaphragm 2c is configured in an L shape in a plan view, and the column plate 23 is configured by bending a corner portion 63 at approximately 90 ° in accordance with the circumferential shape of the steel pipe column 5. When R is provided at the corner of the steel pipe column 5, the column plate 23 of the divided diaphragm 2c may be similarly formed with R at the corner 63 accordingly. Further, the column plate 23 is not limited to the case where the column plate 23 is bent through the corner 63, and may be configured by fixing the two column plates 23 to each other by welding or the like. . Similarly, the transmission plate 28 and the reinforcing plate 29 attached to the column plate 23 are also configured to have an L shape in plan view along the column plate 23. The transmission plate 28 and the reinforcing plate 29 also have a small outward projecting length, for example, approximately the same or less than the tensile joint 21. In addition, tensile joints 21 are provided at both ends of the column plate 23 in the same manner as described above, and the joint surface m is formed at any angle with respect to the extending direction W of the column plate 23 in plan view. However, it is desirable that the angle be greater than 0 ° and less than 45 °.

  By attaching the divided diaphragm 2c and the two divided diaphragms 2a in the same manner via the bolts 25 and the nuts 26, it is possible to achieve the desired effect described above. In addition to this, since the transmission plate 28 and the reinforcing plate 29 are configured to have a small outward projecting length, the steel pipe column 5 can be connected to the outer wall as much as possible without interfering with the vertical trunk edge 62 at the corner of the outer wall 61. 61 can be brought close to the corner side, and the room of the building structure can be taken wider. Further, according to the present invention, the column plate 23, the transmission plate 28, and the reinforcing plate 29 are bent in an L shape in plan view without providing the tensile joint portion 21 at the corner 63 of the divided diaphragm 2c. By providing the tensile joint portion 21, it is possible to prevent interference with the vertical trunk edge 62 due to the protrusion protruding outward.

  In addition, the pillar plate 23 and the tensile joint portion 21 of the divided diaphragm 2c are provided with a pair of reinforcing plates 29 and 29 spaced apart in the vertical direction, and a bolt as a joining member is provided between the pair of reinforcing plates 29 and 29. 25 and a nut 26 are provided. Thereby, even if a compressive force acts on the column plate 23, it is possible to suppress bending deformation of the column plate 23 toward the direction in which the tensile joint portions 21 and 21 expand in the divided diaphragm 2c. For this reason, it becomes possible to suppress that an additional bending acts on the bolt 25 that has fastened and fixed the divided diaphragms 2a and 2c. As a result, the bolt 25 for fastening and fixing between the divided diaphragm 2c and the adjacent divided diaphragm 2a is made larger than the bolt 25 for fastening and fixing between the divided diaphragms 2a and 2a arranged along the H-shaped steel beam 3. There is no need, and the bolt 25 of the same standard can be used.

  In addition, the pillar plate 23 and the tensile joint portion 21 of the divided diaphragm 2c are provided with a pair of reinforcing plates 29 and 29 spaced apart in the vertical direction, and a bolt as a joining member is provided between the pair of reinforcing plates 29 and 29. 25 and a nut 26 are provided. Thereby, even if the bending moment M from the H-shaped steel beam 3 acts on the split diaphragm 2, the out-of-plane bending deformation in which the tensile joint portion 21 of the split diaphragm 2c faces in the out-of-plane direction can be suppressed. For this reason, it becomes possible to suppress that a lever reaction force acts on the volt | bolt 25 which clamped and fixed between the division | segmentation diaphragms 2a and 2c. As a result, it is not necessary to make the plate thickness of the tensile joint portion 21 of the divided diaphragm 2c larger than the plate thickness of the tensile joint portion 21 of the divided diaphragm 2a, and these can be made the same.

  In addition, two bolts 25 and nuts 26 as connecting members are provided in the tensile joint 21 of the split diaphragm 2c so as to be separated in the vertical direction, and the column plate 23 facing the outer wall 61 and the tensile joint 21 thereof are A transmission plate 28 is provided between two bolts 25 and nuts 26 that are spaced apart in the direction. Thereby, in the split diaphragm 2c, the bending deformation of the column plate 23 toward the direction in which the tensile joints 21 and 21 expand and the out-of-plane bending deformation toward the out-of-plane direction of the tensile joint 21 of the split diaphragm 2c are further performed. It can be effectively suppressed. Incidentally, in this embodiment, the transmission plate 28 may be omitted.

  Further, since the joint surface m in the tensile joint portion 21 is set to be more than 0 ° and less than 45 ° with respect to the extending direction W of the column plate 23, the protruding amount of the tensile joint portion 21 itself to the outer wall 61 is suppressed. It is possible to prevent interference with the longitudinal body edge 62.

  15A shows an example in which the first notch 101 is provided for the transmission plate 68 and the second notch 201 is provided for the reinforcing plate 69 when the steel pipe column 5 is used as a side column. ing. The first cutout 101 is cut out from the front end 68a of the transmission plate 68 toward the column plate 23 according to the position where the vertical body edge 62 is formed. Further, the second notch 201 is configured by being cut out from the front end 69a of the reinforcing plate 69 toward the column plate 23 in accordance with the position where the vertical body edge 62 is formed. The first notch 101 and the second notch 201 have the same shape as each other, but may have different shapes, and the first notch 101 and the second notch 201 may have any shape. Good. When the divided diaphragm 2c is actually disposed, the distance between the vertical body edge 62 and the column plate 23 is shortened by bringing the vertical body edge 62 close to the formation place of the first notch 101 and the second notch 201. can do. As a result, the steel pipe column 5 can be brought as close as possible to the corner side of the outer wall 61.

  The column plate 23 and the tensile joint 21 of the divided diaphragm 2b are provided with a pair of reinforcing plates 29 and 29 spaced apart in the vertical direction, and a bolt as a joining member is provided between the pair of reinforcing plates 29 and 29. 25 and a nut 26 are provided. Thereby, also in the example of FIG. 15A, in the split diaphragm 2b, the bending deformation of the column plate 23 toward the direction in which the tensile joints 21 and 21 expand, and the out-of-plane direction of the tensile joint 21 of the split diaphragm 2b. It is possible to suppress out-of-plane bending deformation toward the surface.

  The example of FIG. 15B shows an example in which the first notch 102 is provided for the transmission plate 68 and the second notch 202 is provided for the reinforcing plate 69 when the steel pipe column 5 is used as a corner column. Yes. The first notch 102 is obtained by notching the corner portion of the transmission plate 68 in the vicinity of the corner portion 63 of the divided diaphragm 2c. The second cutout 202 is formed by cutting out the corner portion of the reinforcing plate 69 in the vicinity of the corner 63 of the split diaphragm 2c. The first cutout 102 and the second cutout 202 may have any shape. When the divided diaphragm 2c is actually disposed, the distance between the vertical drum edge 62 and the column plate 23 is shortened by bringing the vertical drum edge 62 close to the formation place of the first notch 102 and the second notch 202. can do. As a result, the steel pipe column 5 can be brought as close as possible to the corner side of the outer wall 61. In addition to this, in the example of FIG. 15, it is possible to exhibit the above-mentioned expected effect only by introducing the first notches 101 and 102 and the second notches 201 and 202, and in particular, new members and components Therefore, it is possible to reduce the construction cost by reducing the number of parts and to save labor in the construction process. Also in the embodiment shown in FIG. 15, the transmission plate 28 may be omitted.

  The column plate 23 and the tensile joint 21 of the divided diaphragm 2c are provided with a pair of reinforcing plates 29 and 29 spaced apart in the vertical direction, and between the pair of reinforcing plates 29 and 29, a bolt 25 and a nut 26 are provided. Is provided. Accordingly, also in the example of FIG. 15B, the bending deformation of the column plate 23 toward the direction in which the tensile joints 21 and 21 expand in the divided diaphragm 2c and the out-of-plane direction of the tensile joint 21 of the divided diaphragm 2b. The outward out-of-plane bending deformation can be suppressed.

  Incidentally, in the example of FIG. 15, tensile joint portions 21 are provided at both ends of the column plate 23 in the same manner as described above, and the joint surfaces m thereof extend in the extending direction W of the column plate 23 in plan view. On the other hand, it may be configured at any angle.

  Furthermore, according to the present invention, so-called high-strength bolt tension joining may be performed between the bolt 25 and the nut 26. As a result, even when a tensile force is applied to the bolt 25 and the nut 26 as a result of the above-described tensile force T being loaded, these can be absorbed, and the split diaphragm 2 is prevented from being displaced. It becomes possible to do.

  As described above, according to the present invention, it is possible to perform the assembly centering on the bolt joint without using the welding joint, so that it is possible to combine the high-strength bolt joint and absorb the force generated in various places. As a result, it is possible to improve the yield strength of the entire joint structure 10 against an earthquake or the like.

  Further, according to the present invention, the outer diaphragm 1 as described above is attached to the upper flange 31 and the lower flange 33 of the H-shaped steel beam 3, respectively. Therefore, when a bending moment based on vibration is applied to the H-shaped steel beam 3 during an earthquake, it is possible to expect the above-described effects on the upper flange 31 side and the lower flange 33 side.

  Moreover, although the joining structure 10 to which this invention is applied demonstrated taking the case where the outer diaphragm 1 was attached with respect to the steel pipe pillar 5 which consists of a square steel pipe, it is not limited to this, It is with respect to the column of a reinforced concrete structure. Of course, the same applies. Even in such a case, the same function can be achieved by bringing the column plate 23 in the divided diaphragm 2 into contact with the column in the same manner and tightening and fixing.

  Furthermore, the present invention can be applied to concrete-filled steel pipe construction (CFT) as an alternative to the steel pipe column 5.

  The present inventors made a test body and conducted a test for confirming the effect of the present invention.

  FIG. 16 is a front view showing the test body used in this test. In the test body, four divided diaphragms A to D are arranged around the steel pipe 55, and the two divided diaphragms are joined by two bolts 75 and nuts 76, respectively. As the bolt 75, a high strength bolt of F10T × M16 defined by Japanese Industrial Standards was used. Bolts of the same standard are used for joining between the divided diaphragms.

  As the steel pipe 55, a 300 mm × 300 mm × 12 mm square steel pipe was used. Moreover, the steel material of SN490B prescribed | regulated by Japanese Industrial Standard was used for the material of the division | segmentation diaphragms AD. Further, the split diaphragms A to D were formed by bending a single steel plate to form the tensile joints 71 at both ends of the column plate 73. The plate thickness of the tensile joint portion 71 and the plate thickness of the column plate 73 were each 16 mm. The plate thickness of the beam plate 72 was 19 mm. In the split diaphragms A to C, the beam plate 72 is attached to the tensile joint 71 and the column plate 73 by welding.

  FIG. 17A is a cross-sectional view showing a split diaphragm D of a test sample of a comparative example, and FIG. 17B is a cross-sectional view showing a split diaphragm D of the test sample of the present invention. In the test body of the comparative example, one transmission plate 78 is provided on the divided diaphragm D, and the reinforcing plate 79 is not provided. In addition, the test sample of the present invention was provided with a transmission plate 78 on the split diaphragm D and a pair of reinforcing plates 79. For this reason, the test body of the example of the present invention is provided with the bolt 75 and the nut 76 provided at the tensile joint 71 of the divided diaphragm D between the pair of reinforcing plates 79. Further, the thickness of the transmission plate 78 of the divided diaphragm D and the thickness of the reinforcing plate 79 were each 19 mm. The transmission plate 78 and the reinforcing plate 79 were attached to the tensile joint 71 and the column plate 73 by welding.

  That is, the difference between the test body of the comparative example and the test body of the present invention is only the presence or absence of the pair of reinforcing plates 79, and the steel pipe 55, the bolt 75, the nut 76, and the tensile joint 71 of the split diaphragms A to D. The beam plate 72, the column plate 73, and the transmission plate 78 are the same.

  FIG. 18A is a side view showing the loading situation of this test, and FIG. 18B is a front view of FIG. 18A. In the test, each test specimen of the comparative example and the example of the present invention was subjected to monotonic tension loading with a load R, and each divided diaphragm was divided into four parts between the divided diaphragms AB, between the divided diaphragms BC, between the divided diaphragms CD and between the divided diaphragms DA. The amount of deformation Δs in the meantime was measured. FIG. 19A is a diagram showing the relationship between the amount of deformation Δs between the divided diaphragms and the load of the comparative example, and FIG. 19B is the amount of deformation Δs between the divided diaphragms of the present invention. It is a figure which shows the relationship between a load.

In the comparative example, when the load was about 0.9R _max , both the bolts 75 between the divided diaphragms CD were broken and ended. Further, as shown in FIG. 19A, the amount of deformation Δs between the divided diaphragms CD where the bolts 75 are broken is between the other divided diaphragms (between the divided diaphragms AB, between the divided diaphragms BC, and between the divided diaphragms DA). It became larger than the amount of deformation Δs. As described above, in the comparative example, the amount of deformation Δs is increased and the bolt 75 is broken at the joint portion with the split diaphragm D where only the transmission plate 78 is provided.

On the other hand, in the example of the present invention, the bolt 75 did not break between any of the divided diaphragms when loaded to near 0.9R _max . In the example of the present invention, in consideration of the safety of the test, the loading was finished in the middle after loading to near 0.9R _max . As shown in FIG. 19B, the amount of deformation Δs between the divided diaphragms CD and between the divided diaphragms DA is the amount of deformation Δs between the other divided diaphragms (AB between the divided diaphragms and BC between the divided diaphragms). Became smaller. Thus, in the example of the present invention, the amount of opening deformation Δs becomes small at the joint portion between the transmission plate 78 and the divided diaphragm D where the reinforcing plate 79 is provided. From this, if the loading of the example of the present invention is continued without stopping halfway, the bolt 75 breaks either between the divided diaphragms AB or between the divided diaphragms BC where the opening deformation amount Δs is large. It is estimated that it will end. Therefore, in the example of the present invention, it can be said that the strength between the divided diaphragms CD and between the divided diaphragms DA can exceed the strength between the divided diaphragms AB and the divided diaphragms BC. The amount of deformation ΔS between the split diaphragms CD and between the split diaphragms DA can be suppressed, and the proof stress exceeds that between the split diaphragms AB and the split diaphragms BC. The bolt 75 and the nut 76 are between the pair of reinforcing plates 79. This is because the bending deformation of the column plate 73 in the divided diaphragm D and the out-of-plane bending deformation toward the out-of-plane direction of the tensile joint 71 can be suppressed by being provided.

  As described above, in the example of the present invention, the pillar plate 73 and the tensile joint portions 71 provided at both ends thereof are provided with the pair of reinforcing plates 79, and between the pair of reinforcing plates 79, the bolt 75 and the nut 76 are provided. Is provided. Thereby, in the example of this invention, the bending deformation of the column plate 73 which goes to the direction where the tensile junction parts 71 and 71 of the division | segmentation diaphragm D spread mutually can be suppressed. For this reason, it becomes possible to suppress that an additional bending acts on the bolt 75 at the joint location of the split diaphragm D. As a result, in the present invention, it is not necessary to increase the bolts 75 used for joining the divided diaphragms D, and the bolts 75 that join the other divided diaphragms and the same standard bolts can be used.

  In the example of the present invention, a pair of reinforcing plates 79 are provided on the column plate 73 and the tensile joints 71 provided at both ends thereof, and a bolt 75 and a nut 76 are provided between the pair of reinforcing plates 79. It is done. Thereby, in the example of the present invention, the out-of-plane bending deformation in which the tensile joint portion 71 of the divided diaphragm D faces in the out-of-plane direction can be suppressed. For this reason, the insulator reaction force can be suppressed in the bolt 75 at the joint location of the divided diaphragm D. As a result, in the present invention, it is not necessary to make the plate thickness of the tensile joint portion 71 of the divided diaphragm D larger than the plate thickness of the tensile joint portion 71 of the other divided diaphragms A to C. can do.

DESCRIPTION OF SYMBOLS 1 Outer diaphragm 2 Split diaphragm 3 H-shaped steel beam 5 Steel pipe column 10 Joint structure 21 Tensile joint 21a Upper tensile joint 21b Lower tensile joint 22 Beam plate 22a Front end 22b Side end 23 Column plate 23a Upper column plate 23b Lower column plate portion 25, 41 Bolt 26, 42 Nut 28 Transmission plate 29 Reinforcement plate 31 Upper flange 32 Web 33 Lower flange 61 Outer wall 62 Vertical trunk edge 63 Corner 68 Transmission plate 69 Reinforcement plate 101, 102 First notch 201, 202 Second notch 126, 127 bolt hole

Claims (4)

In the column-to-beam joint structure in which an H-shaped steel beam is joined to the column by an outer diaphragm,
The outer diaphragm consists of a divided diaphragm divided into a plurality of parts,
The divided diaphragm has a column plate that comes into contact with the column,
Of the plurality of split diaphragms, the split diaphragm arranged along the H-shaped steel beam has a beam plate that is attached to a flange of the H-shaped steel beam and has the column plate provided at an end thereof.
Between the divided diaphragms is fastened and fixed via a joining member, and a joining surface between the divided diaphragms is formed by tensile joints provided at both ends of the pillar plate, so that each pillar surface of the pillar is formed. Only the column plate in one of the divided diaphragms is in contact,
The columnar plate facing the outer wall and the tensile joints provided at both ends thereof are provided with a pair of reinforcing plates spaced apart in the vertical direction,
A joining structure of columns and beams, wherein the joining member is provided between the pair of reinforcing plates. A plurality of the joining members are provided apart from each other in the vertical direction at the tensile joint portion,
The column according to claim 1, wherein a transmission plate is provided between the plurality of joining members spaced apart in the vertical direction at the pillar plate facing the outer wall and the tensile joint provided at both ends thereof. And beam joint structure. The reinforcing plate is provided with a first notch corresponding to a vertical trunk edge provided on the outer wall,
The column-to-beam joint structure according to claim 2, wherein the transmission plate is provided with a second notch corresponding to the longitudinal body edge. The pillar plate facing each outer wall constituting the corner is L-shaped in plan view along the pillar,
The column according to any one of claims 1 to 3, wherein the column plate and the tensile joints provided at both ends thereof are provided with the reinforcing plate having an L shape in plan view. And beam joint structure.

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