Pillar / beam joint part structure having sleeve in woody frame

Abstract

To provide a pillar / beam joint part structure capable of ensuring a sleeve in a joint member while rigidly joining a pillar and a beam by the highly resistant, highly rigid, and tough joint member.SOLUTION: A steel joint member 15 having a sleeve 14 formed therein is provided in a joint part 13 of wooden pillars 11a and 11b and a beam 12. The joint member includes an upper pillar side flange 17, a lower pillar side flange 19, a beam side flange 21, a square reinforcement web 24 provided in a part surrounded by the upper pillar side flange, the lower pillar side flange, and the bam side flange, and a plurality of reinforcement stiffeners 25a and 25b arranged in a lattice shape with required gaps on the front side and the rear side of the web. A sleeve is formed in a prescribed section of the web sectioned in a lattice shape by the stiffeners.SELECTED DRAWING: Figure 1-1

Description

[Technical field]

[0001] The present invention relates to a column-beam joint structure having a sleeve in a wooden frame. [Background technology]

[0002] Conventionally, as a method for joining wooden pillars and beams, a method using an anchor bolt in combination with an adhesive, a joining method using a lag screw bolt, a tension bolt, etc., and a joining method using a steel joint member at the joint between the pillar and the beam are also known. The applicant calls the joining method using an anchor bolt in combination with an adhesive a "glue in unbonded anchor (GIUA)" or "glue in rod (GIR)" (see Patent Document 1). In addition, the conventional guideline for installing a piping sleeve on a wooden beam without reinforcing it is that the position should be within the central third of the beam's depth, and the sleeve diameter should be no more than one-quarter of the beam's depth and 150 mm or less. This guideline is shown in the section entitled "Reduction in beam cross-sectional performance due to loss of through holes" in "Technical data on wooden school buildings using JIS A 3301 - Ministry of Education, Culture, Sports, Science and Technology, March 2015" (see Non-Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2021-188326 A [Non-patent literature]

[0004] [Non-Patent Document 1] "Technical information on wooden school buildings using JIS A 3301 - March 2015, Ministry of Education, Culture, Sports, Science and Technology" Summary of the Invention [Problem to be solved by the invention]

[0005] For example, when installing a sleeve for a kitchen air supply and exhaust duct on a wooden beam in a wooden building with a two-hour fire resistance, a sleeve opening of 300φ or more is required, including the fireproof coating inside the sleeve and the insulation of the piping. Therefore, measures such as increasing the beam depth to match the size of the sleeve or reinforcing the beam, as per the above guidelines, are necessary, which creates design constraints. Alternatively, design constraints may arise, such as installing a piping duct under the beam or under the floor. In addition, when providing a sleeve that will cause a cross-sectional defect in a beam, even if it is desirable to provide the sleeve close to the end of the beam according to the plan, it is said to be undesirable to provide the sleeve near the joint of the beam where stress is concentrated. Furthermore, even if a sleeve can be provided on the beam by reinforcing it with a high-tensile fiber sheet such as carbon fiber, aramid fiber, or glass fiber, the material cost of the high-tensile fiber sheet and the construction labor required are high, resulting in increased costs.

[0006] The present invention has been proposed to solve the above-mentioned problems, and provides a column-beam joint structure in which a column and beam are rigidly joined by a steel joint member that has high strength, rigidity, and toughness, while also securing a sleeve to the joint member. [Means for solving the problem]

[0007] The gist of the present invention for solving the problems of the conventional example is a structure of a column-beam joint having a sleeve in a wooden frame, in which a steel joint member with a sleeve is provided at the joint between a wooden column and a beam, and the joint member at least comprises an upper column flange to which an end of an upper column is connected, a lower column flange to which an end of a lower column is connected, a beam flange provided along both ends of the upper column flange and the lower column flange and to which an end of a beam is connected, a rectangular reinforcing web provided in an area surrounded by the upper column flange, the lower column flange, and the beam flange, and a plurality of reinforcing stiffeners arranged in a lattice pattern at required intervals on the front and back sides of the web, and the sleeve is formed in a predetermined section of the web that is partitioned in a lattice pattern by the stiffeners.

[0008] The gist of the present invention for solving the problems of the above-mentioned conventional example is a structure of a column-beam joint having a sleeve in a wooden frame, in which a steel joint member having a sleeve is provided at the joint between a wooden column and a beam, and the joint member comprises an upper column side flange to which an end of an upper column is connected, a lower column side flange to which an end of a lower column is connected, side flanges provided along both ends of the upper column side flange and the lower column side flange and having a column side bracket, a beam side flange to which an end of a beam is connected and having a beam side bracket, and the upper column side flange. The bracket comprises at least a rectangular reinforcing web provided in the area surrounded by the lower column-side flange and the side flange, and a plurality of reinforcing stiffeners arranged in a lattice pattern at required intervals on the front and back sides of the web, wherein the sleeve is formed in a predetermined section of the web divided into a lattice pattern by the stiffeners, the column-side bracket and the beam-side bracket are fastened with high-strength bolts via a splice plate, and the sleeve is formed at the joint between the column-side bracket and the beam-side bracket.

[0009] Further, the sleeve is not formed in the section where the diagonal line of the web spans, and the sleeve is formed in the section where the diagonal line of the web does not span; The connection between the column side flange and the end of the column, and the connection between the beam side flange and the end of the beam are connected and fastened by anchor bolts or rod-shaped members of a required length fixed to the column side flange or the beam side flange; It includes. Effect of the Invention

[0010] According to the column-beam joint structure with a sleeve in a wooden frame of the present invention, the column and beam are rigidly joined by a steel joint member that is high in strength, rigidity and toughness, and by providing a sleeve in the joint member, it is possible to provide a sleeve at or near the beam joint where stress is concentrated. This makes it possible to secure a sleeve for piping equipment without causing any cross-sectional loss in the wooden beam to provide the sleeve, without increasing the beam depth of the wooden beam more than necessary, and without reinforcing the opening of the sleeve. Furthermore, when the column side bracket and the beam side bracket are fastened with high-strength bolts via a splice plate, a sleeve can be provided at the joint between the column side bracket and the beam side bracket, which provides various excellent effects, such as making it easier to adjust the erection of the column side bracket and the beam side bracket on site.

[0011] No sleeve is formed in the section where the diagonal line of the web is applied, and the sleeve is formed in the section where the diagonal line of the web is not applied, thereby achieving the excellent effect of avoiding the sleeve in the part where the stress of the joint member is applied and providing the sleeve in the part where the stress is low.

[0012] The connection between the column side flange and the end of the column, and the connection between the beam side flange and the end of the beam are connected and fastened with anchor bolts or rod-shaped members of the required length fixed to the column side flange or beam side flange and shear keys, which has the excellent effect of rigidly joining the column and beam with the joint member while transmitting stress from the anchor bolts etc. to the joint member. [Brief description of the drawings]

[0013] [Figure 1-1] 1 is a front view of a joint between a wooden pillar and a beam according to a first embodiment of the present invention. FIG. [Figure 1-2] 1 is a cross-sectional view taken along line AA in FIG. 1-1. [Figure 1-3] FIG. 1 is a cross-sectional view taken along line BB in FIG. [Figure 1-4] 1 is a perspective view of a joint between a wooden pillar and a beam according to a first embodiment of the present invention. FIG. [Figure 2-1] FIG. 11 is a perspective view of a joint between a wooden pillar and a beam according to a second embodiment of the present invention. [Figure 2-2] FIG. 11 is a perspective view showing the individual components of a joint between a wooden pillar and a beam in accordance with a second embodiment of the present invention, with the components separated. [Figure 2-3] FIG. 11 is a perspective view showing the individual components of a joint between a wooden pillar and a beam in accordance with a second embodiment of the present invention, with the components separated. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Next, an embodiment of the present invention will be described with reference to the drawings. The present invention relates to a column-beam joint structure with a sleeve in a wooden frame, in which the column and beam are rigidly joined by a steel joint member with high strength, rigidity, and toughness, while a sleeve is provided in the joint member. EXAMPLES

[0015] The structure of the column-beam joint with a sleeve in this wooden frame is, as shown in Figures 1-1 to 1-3, provided with a steel joint member 15 with a sleeve 14 at the joint 13 between the wooden columns 11a, 11b and the beam 12.

[0016] The joint member 15 is composed of an upper column side flange 17 to which the end of the upper column 11a is connected, a lower column side flange 19 to which the end of the lower column 11b is connected, a beam side flange 21 provided along both ends of the upper column side flange 17 and the lower column side flange 19 and to which the end of the beam 12 is connected, a rectangular reinforcing web 24 provided in the area surrounded by the upper column side flange 17, the lower column side flange 19, and the beam side flange 21, and a plurality of reinforcing stiffeners 25a, 25b (see Figure 1-2) arranged in a lattice pattern at required intervals on the front and back sides of the web 24.

[0017] The upper column side flange 17 and the lower column side flange 19 are rectangular steel plates having the required width and length, and both flanges 17, 19 are arranged horizontally with the required distance between them. The upper column side flange 17 is connected and tightly fastened to the end of the upper column 11a, and the lower column side flange 19 is connected and tightly fastened to the end of the lower column 11b.

[0018] The beam side flanges 21 are rectangular steel plates having the required width and length, and the beam side flanges 21 on one side and the other side are arranged vertically with the required distance between them, and the ends of the beams 12 are connected and tightly fastened to each beam side flange 21.

[0019] The connection between the end of the upper column 11a and the upper column side flange 17, the connection between the end of the lower column 11b and the lower column side flange 19, and the connection between the end of the beam 12 and the beam side flange 21 are fastened by anchor bolts 26 and shear keys 27 via the upper column side flange 17, the lower column side flange 19, and the beam side flange 21, respectively. In this way, by fastening with the anchor bolts 26, the columns 11a, 11b and the beam 12 are rigidly joined by the joint members 15, while stress is transmitted from the anchor bolts 26 to the joint members 15.

[0020] As already mentioned, the fastening joint using the anchor bolt 26 includes the adhesively unbonded anchor (GIUA) joining method or the adhesively bonded anchor (GIR) joining method that uses an anchor bolt in combination with an adhesive (see Patent Document 1), but is not necessarily limited to the anchor bolt 26, and it is also possible to use metal rod-shaped members such as lag screw bolts, tension bolts, PC steel bars, etc. as connectors. The shear key 27 has the role of transmitting the shear force acting on the pillars and beams to the joint member 15, and prevents misalignment between the joint member 15 and the pillars or beams. Note that the shear key 27 is not essential and may be omitted as appropriate.

[0021] The web 24 is a rectangular steel plate that is integrally provided for reinforcement in the area surrounded by the upper column-side flange 17, the lower column-side flange 19, and the beam-side flange 21.

[0022] The stiffeners 25a, 25b are long steel plates and are arranged in a lattice pattern at required intervals on the front and back sides of the web 24 (see Figs. 1-1 and 1-2). A plurality of horizontal stiffeners 25a and a plurality of vertical stiffeners 25b are arranged, and the stiffeners 25a, 25b divide the web 24 into a grid pattern like a checkerboard.

[0023] The sleeve 14 is formed on a web 24 of predetermined sections that are partitioned into a lattice shape by horizontal stiffeners 25a and vertical stiffeners 25b. Specifically, the sleeve 14 is formed in the web 24 in such a manner that the sleeve 14 is not formed in the area where the diagonal 28 of the web 24 is large, and the sleeve 14 is formed in the area where the diagonal 28 of the web 24 is not large (see FIG. 1-1). Furthermore, in other words, the position where the sleeve 14 is formed on the web 24 is such that the sleeve 14 is not formed in the sections at the four corners of the web 24, the sleeve 14 is not formed in the two sections in the central part of the web 24, and the sleeve 14 is formed in the other sections (see Figure 1-1). In other words, with columns 11a, 11b and beams 12 fastened together with anchor bolts 26 etc., rotation occurs at the end of column-beam joint member 15 in response to inter-story deformation during an earthquake. At that time, stress transmitted from joints such as anchor bolts 26 causes stress as shown by diagonal line 28 to be applied within joint member 15, and sleeve 14 cannot be provided in the section where diagonal line 28 is applied. However, sleeve 14 can be provided in the section where diagonal line 28 is not applied because the stress is low.

[0024] This type of joint can be applied to one-way rigid frame structures, two-way rigid frame structures, and pin-jointed frames. Also, as shown in Fig. 1-4, the orthogonal beam 29 perpendicular to the one-way rigid frame structure can be joined to a steel or wooden beam by pin connection using a conventional steel-framed joint method, with a gusset plate 30 extending from the steel joint member 15 and fastened with a high-strength bolt 32. In Fig. 1-4, the reference numeral 29 denotes the orthogonal beam, and the reference numeral 31 denotes the piping for facilities. EXAMPLES

[0025] Next, the structure of a column-beam joint having a sleeve in a wooden frame according to the second embodiment shown in Figures 2-1 to 2-3 will be described. In this second embodiment, the same parts as those in the first embodiment are given the same reference numerals and their details will be omitted.

[0026] The structure of the column-beam joint with a sleeve in the wooden frame of this second embodiment is, as shown in Figures 2-1 to 2-3, provided with a steel joint member 41 with a sleeve 14 formed at the joint 13 between the wooden columns 11a, 11b and the beam 12.

[0027] The joint member 41 is composed of an upper column side flange 17 to which the end of the upper column 11a is connected, a lower column side flange 19 to which the end of the lower column 11b is connected, a side flange 43 provided along both ends of the upper column side flange 17 and the lower column side flange 19 and having a column side bracket 42, a beam side flange 45 to which the end of the beam 12 is connected and has a beam side bracket 44, a rectangular reinforcing web 24 provided in the area surrounded by the upper column side flange 17, the lower column side flange 19, and the side flange 43, and a plurality of reinforcing stiffeners 25a, 25b arranged in a lattice pattern at required intervals on the front and back sides of the web 24.

[0028] The sleeve 14 is formed on a web 24 of predetermined sections that are partitioned into a lattice shape by horizontal stiffeners 25a and vertical stiffeners 25b. Specifically, the sleeve 14 is formed in the web 24 in such a manner that the sleeve 14 is not formed in the area where the diagonal 28 of the web 24 is large, and the sleeve 14 is formed in the area where the diagonal 28 of the web 24 is not large (see FIG. 1-1). In other words, the sleeve 14 is not formed in the sections at the four corners of the web 24, the sleeve 14 is not formed in the two sections in the central part of the web 24, and the sleeve 14 is formed in the other sections (see Figure 1-1). This configuration and the reasons for it are similar to those in the first embodiment, and so a description thereof will be omitted here.

[0029] The side flanges 43 are rectangular steel plates having a required width and length, and the side flanges 43 on one side and the other side are disposed vertically with a required distance between them. In addition, a column side bracket 42 is integrally provided on the side flange 43.

[0030] As shown in Fig. 2-3, the column-side bracket 42 has four horizontal steel plates 46 arranged at predetermined intervals in the horizontal direction, and reinforcing vertical steel plates 47 are arranged between each of the horizontal steel plates 46. A groove 48a for forming a sleeve 48 is provided in the vertical steel plate 47 in the center.

[0031] The beam side flange 45 is a rectangular steel plate of a required width and length, and is connected and fastened to the end of the beam 12. The connection between the end of the beam 12 and the beam side flange 45 is fastened by an anchor bolt 26 and a shear key 27 via the beam side flange 45. In this way, by fastening with the anchor bolts 26, the columns 11a, 11b and the beam 12 are rigidly joined by the joint members 41, while stress is transmitted from the anchor bolts 26 to the joint members 41.

[0032] As described above, the fastening joint using the anchor bolt 26 can be not only the adhesively unbonded anchor (GIUA) joining method or the adhesively bonded anchor (GIR) joining method, but also a metal rod-shaped member such as a lag screw bolt, a tension bolt, or a PC steel bar can be used as a connector.

[0033] A beam side bracket 44 is integrally provided on the beam side flange 45 . As shown in Fig. 2-3, the beam-side bracket 44 has four horizontal steel plates 49 arranged at predetermined intervals in the horizontal direction, and reinforcing vertical steel plates 50 are arranged between each horizontal steel plate 49. A groove 48b for forming a sleeve 48 is provided in the vertical steel plate 50 in the center.

[0034] As shown in FIG. 2-3, the column-side bracket 42 and the beam-side bracket 44 are fastened together by a plurality of high-strength bolts 52 via a plurality of splice plates 51. At the joint position between the column-side bracket 42 and the beam-side bracket 44, the grooves 48a and 48b join to form a sleeve 48 (see FIG. 2-1). By providing the sleeve 48 in the central portion between the column-side bracket 42 and the beam-side bracket 44 in this way, it becomes possible to provide the sleeve 48 even in a portion fastened with the anchor bolt 26 and less affected by the stress transmitted to the joint member 41.

[0035] By using the method of joining the column side bracket 42 and the beam side bracket 44 as described above, the beam 12 with the beam side bracket 44 fastened with anchor bolts 26 or the like, and the upper column 11a with the joint member 41 fastened with anchor bolts 26 or the like are manufactured in advance at a factory, and at the site, the lower column 11b with anchor bolts 26 or the like incorporated into the column head is fastened to the joint member 41 of the upper column 11a, and further the column side bracket 42 and beam side bracket 44 are sandwiched with a splice plate 51 and fastened with high-strength bolts 52, thereby forming a joint between the column and the beam (see Figures 2-1 and 2-2). With this type of work process, the only joining work required on site is tightening the high-strength bolts 52, eliminating various on-site tasks such as injecting adhesive into the anchor bolts 26. Furthermore, there is the advantage that it becomes easier to adjust the plumbing of the column-side brackets 42 and the beam-side brackets 44.

[0036] The structure of the column-beam joint with a sleeve in a wooden frame constructed as described above rigidly joins the column and beam with a steel joint member that is high in strength, rigidity and toughness, and by securing the sleeve to the joint member, it is possible to provide the sleeve at or near the beam joint where stress is concentrated. This makes it possible to secure a sleeve for piping equipment without causing any cross-sectional loss in the wooden beam to provide the sleeve, without increasing the beam depth of the wooden beam more than necessary, and without reinforcing the opening of the sleeve. Furthermore, when the column side bracket and the beam side bracket are fastened with high-strength bolts via a splice plate, a sleeve can be provided at the joint between the column side bracket and the beam side bracket, making it easier to adjust the erection of the column side bracket and the beam side bracket on site. [Explanation of symbols]

[0037] 11a, 11b pillars 12 Beam 13 Joint 14 Sleeve 15 Joint material 17 Upper column flange 19 Lower column flange 21 Beam side flange 24 Web 25a, 25b stiffeners 26 Anchor bolt 27 Shear Key 28 Diagonal 29 Orthogonal Beam 30 Gusset Plate 31 Piping for equipment 32 High strength bolt 41 Joint parts 42 Pillar side bracket 43 Side flange 44 Beam side bracket 45 Beam side flange 46 horizontal steel plate 47 Vertical steel plate 48 Sleeve 48a Groove 48b Groove 49 Horizontal steel plate 50 vertical steel plate 51 Splice Plate 52 High strength bolt

Claims

1. A structure of a column-beam joint having a sleeve in a wooden frame, The joints between the wooden columns and beams are provided with steel joint members with sleeves. The connection member is an upper column side flange to which the end of the upper column is connected; a lower column side flange to which the end of the lower column is connected; A beam side flange is provided along each end of the upper column side flange and the lower column side flange, and an end of a beam is connected to the beam side flange; A rectangular reinforcing web provided in a region surrounded by the upper column side flange, the lower column side flange, and the beam side flange; A plurality of reinforcing stiffeners are arranged in a lattice shape at required intervals on the front side and the back side of the web, At least The sleeve is formed in a predetermined section of the web that is divided into a lattice shape by the stiffener. A structure of a column-beam joint having a sleeve in a wooden frame, characterized in that:

2. A structure of a column-beam joint having a sleeve in a wooden frame, The joints between the wooden columns and beams are provided with steel joint members with sleeves. The connection member is an upper column side flange to which the end of the upper column is connected; a lower column side flange to which the end of the lower column is connected; side flanges provided along ends of the upper and lower column-side flanges, respectively, and each having a column-side bracket; A beam side flange to which an end of the beam is connected and which has a beam side bracket; a rectangular reinforcing web provided in a region surrounded by the upper column side flange, the lower column side flange, and the side flange; A plurality of reinforcing stiffeners are arranged in a lattice shape at required intervals on the front side and the back side of the web, At least The sleeve is formed in a predetermined section of the web that is divided into a lattice shape by the stiffener, The column side bracket and the beam side bracket are fastened to each other by a high strength bolt via a splice plate, and the sleeve is formed at the joint between the column side bracket and the beam side bracket. A structure of a column-beam joint having a sleeve in a wooden frame, characterized in that:

3. The sleeve is not formed in the section where the diagonal line of the web crosses, and the sleeve is formed in the section where the diagonal line of the web does not cross.

3. A structure of a column-beam joint having a sleeve in a wooden structure according to claim 1 or 2.

4. The connection between the column side flange and the end of the column, and the connection between the beam side flange and the end of the beam shall be connected and fastened with anchor bolts or rod-shaped members of the required length fixed to the column side flange or the beam side flange.

3. A structure of a column-beam joint having a sleeve in a wooden structure according to claim 1 or 2.

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