JP2020183694A - Connection structure of wooden pole and wooden beam and construction method thereof - Google Patents

Abstract

To provide a connection structure of a wooden pole and a wooden beam having a superior workability and capable of preventing a damage of the beam, and its construction method.SOLUTION: The connection structure 1 comprises a first wooden pole member 6, a second wooden pole member arranged above the first pole member 6, a long member 15 such as a steel rod having a lower end side and an upper end side mounted to the first pole member 6 and the second pole member respectively, a wooden beam member 8 and a connection body 4 arranged between the first pole member 6 and the second pole member and with which the beam member 8 is connected. No crack occurs in earthquake as the end part of the beam member 8 is supported by a lower support part 20 of the connection body 4 from below and is supported by an upper support member 5 fixed to the connection body 4 as well. In addition, as an adhesion work of a lower end part of the long member 15 to the first pole member 6 is performed at a factory, an adhesion work at a site is only an adhesion work of an upper end part of the long member 15 to the second pole member.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a joint structure between a wooden column and a wooden beam and a method for constructing the joint structure.

Conventionally, various structures have been proposed as a joint structure between a wooden column and a wooden beam. For example, Patent Document 1 describes a rigid joint structure of a laminated wood beam and a laminated wood column. In the joining structure described in Patent Document 1, the upper and lower columns are joined by inserting the tenons of the upper and lower columns into the box-shaped cross-sectional shape joint hardware provided at the joint. Further, the fixing metal fitting protruding from the box-shaped cross-sectional shape joint metal fitting is inserted into the receiving metal fitting arranged in the groove provided on the end face of the beam, and the groove is filled with grout to join the beam to the column. To.

Further, Patent Document 2 describes that the rotational rigidity and proof stress of the joint portion are increased by introducing prestress into the joint portion of the wooden column beam. Wood-based materials such as laminated wood and single-plate laminated materials used for columns and beams are orthogonally anisotropic, that is, they are strong against compressive force in the direction parallel to the fiber but weak in the direction perpendicular to the fiber. It has the property of. Therefore, in the structure described in Patent Document 2, prestress is introduced by reinforcing by inserting a reinforcing bar extending in the lateral direction into the column.

Further, Patent Document 3 describes that a joint member made of a steel frame is joined to a wooden beam via a protruding metal fitting, and is joined to a wooden column by a steel rod or a bolt.

Japanese Unexamined Patent Publication No. 6-173343 JP-A-2009-197416 Japanese Unexamined Patent Publication No. 2015-218436

In the joint structure described in Patent Document 1, since the wooden columns have orthogonal anisotropy, the amount of reinforcement by the iron members of the wooden columns is large, and the processing labor and cost increase. Further, when bent, the end portion in contact with the joint portion of the beam is crushed on the compression side and separated at an early stage on the tension side, resulting in low rigidity. The joint structure described in Patent Document 2 reinforces the joint portion of wooden columns and beams. However, since pressure is applied only to the square washer at the end of the beam, sufficient prestress cannot be applied to the beam. In addition, reinforcing the columns with reinforcing bars is time-consuming, and there is a risk that the wood columns will be damaged and the joints will be damaged at an early stage. In the joint structure described in Patent Document 3, the metal fitting for attaching the beam protrudes from the joint member, which requires labor for processing and construction, and at the end portion in contact with the joint portion of the beam when bent. , Crushing occurs on the compression side, separation occurs early on the tension side, rigidity decreases, residual deformation after a large earthquake is large, and since the upper and lower columns are attached to the joint members, adhesive is injected at each site. Work was needed.

Further, the wooden beam has a problem that the end portion of the beam is cracked and the beam moves to either the upper or lower side at the time of an earthquake when only the crimping joint by prestress is performed (see FIG. 4 (A)).

In view of such a problem, an object of the present invention is to provide a joint structure between a wooden column and a wooden beam, which has good workability and can prevent damage to the beam, and a method for constructing the joint structure. It is also an object of at least some embodiments of the present invention to provide a junction structure of moment resistance junctions that can give a large prestress to the beam.

At least some embodiments of the present invention are a joint structure (1,31,51) of a wooden pillar (2) and a wooden beam (3), the first pillar member (6) made of wood, and the first pillar member (6) made of wood. The wooden second pillar member (7) arranged above the first pillar member, the lower end side is fixed to the first pillar member, and the upper end side is fixed to the second pillar member, and the first pillar member and It is arranged between the connecting portion (15, 58) connecting the second pillar members, the wooden beam member (8), the first pillar member and the second pillar member, and extends in the vertical direction. A joint (4,32) including through holes (14, 39, 54) through which the connecting portion is inserted, and lower supporting portions (20, 38) that project laterally and support the end portions of the beam members from below. And / or an upper support member (5) which is fixed to the joint and / or the second column member and supports the end portion of the beam member from above.

According to this configuration, since the end portion of the beam member is supported from above and below by the lower support portion and the upper support member, it is possible to prevent the end portion of the beam member from cracking and moving up and down during an earthquake.

In at least some embodiments of the present invention, in the above configuration, the joint is made of concrete or steel, and the beam member is such that pressure is generated between the side surface of the joint and the end face of the beam member. It is characterized by further providing a tension material that gives prestress to the concrete.

According to this configuration, since the joint is made of concrete or steel instead of a wood material having orthogonal anisotropy, the joint is not broken even if a relatively large prestress is applied to the beam member. Further, by applying a relatively large prestress to the beam member, the joint between the beam member and the joint body can be made into a moment resistance joint, the rigidity and the bearing capacity of the ramen frame are increased, and the rigidity of the entire frame is increased. Also, the soft layer at the end of the beam member is crushed by receiving pressure from the joint body, so that a more reliable rigid joint can be obtained.

In at least some embodiments of the present invention, in any of the above configurations, the joint (4) is a precast concrete member, has the through holes (14, 54), and has the lower support portion from the side surface. A pair of sides of the main body (12) that projects (20) and the beam member that protrudes from the side surface of the main body and faces each other in the width direction in order to regulate the movement of the beam member in the width direction. It is characterized by including a portion supporting portion (21).

According to this configuration, since the upper part of the lower support portion is open in the joint body, the beam member can be moved from the upper part to the lower part and arranged at a predetermined position. Therefore, there are less restrictions on the construction order of the beam member and the joint body as compared with the case where the beam member is moved in the extending direction and arranged at a predetermined position.

In at least some embodiments of the present invention, in the above configuration, the upper support member comprises a steel or precast concrete member extending in the width direction of the beam member and above the pair of side supports. It is characterized in that it is arranged and fixed to the joint.

According to this configuration, the pair of side support portions can regulate the movement of the end portion of the beam member in the horizontal direction orthogonal to the extending direction, and the upper support member can be configured with a simple configuration.

In at least some embodiments of the present invention, in the first or second configuration, the joint (32) is placed on the upper end of the first column member and includes the lower support portion. A steel plate (33), a steel tubular member (34) that opens vertically and is fixed to the upper surface of the first steel plate at the lower end, and a steel tubular member (34) that is fixed to the upper end of the tubular member at the lower end and is fixed to the upper surface. A position in which the first steel plate and the second steel plate are vertically aligned with each other inside the side wall of the tubular member, including the second steel plate (35) on which the second pillar member is placed. It is characterized by including the through hole (39) arranged in.

According to this configuration, since the upper part of the lower support portion is open in the joint body, the beam member can be moved from the upper part to the lower part and arranged at a predetermined position. Therefore, there are less restrictions on the construction order of the beam member and the joint body as compared with the case where the beam member is moved in the extending direction and arranged at a predetermined position.

In at least some embodiments of the present invention, in the above configuration, the joint extends so as to be orthogonal to the width direction of the beam member, and is outside the upper surface and / or the tubular member of the first steel plate. It further includes a third steel plate (37) that is fixed to the side surface and engages with the end portion of the beam member.

According to this configuration, the third steel plate can regulate the movement of the end portion of the beam member in the horizontal direction orthogonal to the extending direction.

In at least some embodiments of the present invention, in any of the configurations having the steel joints described above, the joints are made of steel fixed to the lower surface of the first steel plate and the upper surface of the second steel plate. The plate frame (36) further included and fixed to the lower surface of the first steel plate is fixed so as to fit the upper end portion of the first pillar member and fixed to the upper surface of the second steel plate. The plate frame is arranged along the side edge of the second steel plate to receive the lower end portion of the second pillar member, and the upper support member is a steel material or precast extending in the width direction of the beam member. It is characterized in that it includes a concrete member and is fastened to the plate frame fixed to the upper surface of the second steel plate by a fastener (22).

According to this configuration, the plate frame transmits the stress in the horizontal direction of the upper end portion of the first pillar member and the lower end portion of the second pillar member, and facilitates the attachment of the upper support member.

In at least some embodiments of the present invention, in any of the above configurations, the connecting portion is a long member (15) having a lower end side fixed to the first pillar member and an upper end side fixed to the second pillar member. ), Or the lower end side is fixed to the first pillar member (52), and the upper end side is fixed to the second pillar member and the lower end side is to the upper end side of the first long member. It is characterized by including a second long member (53) that has been inherited.

According to this configuration, the shearing force and the bending moment can be transmitted between the first pillar member and the second pillar member with a simple structure.

At least some embodiments of the present invention are methods for constructing a joint structure (1,31) between a wooden pillar (2) and a wooden beam (3), and a through hole (14) extending in the vertical direction. , 39) and a step of creating a joint (4,32) including a laterally projecting lower support portion (13,38) and extending upward from the upper surface of the first pillar member (6) made of wood. A step of fixing the long member (15) to the first pillar member, and a step of arranging the first pillar member to which the long member is fixed at a position where the pillar should be constructed. A step of placing the joint on the upper surface of the first pillar member so that the long member is inserted into the through hole, and a wooden beam member (8) on the upper surface of the lower support portion. A step of placing the end portion, a step of fixing the upper support member (5) to the joint so as to support the upper surface of the end portion of the beam member, and a wooden material including a bottomed hole (18) on the lower surface. The step of moving the second pillar member (7) from above to the bottom so that the upper end side of the long member is inserted into the bottomed hole and placing the second pillar member (7) on the joint, and the bottomed hole. It is characterized by comprising a step of injecting an adhesive into the beam.

According to this configuration, the long member is placed at the place where the pillar should be constructed with the lower end side fixed to the first pillar member, so that the long member is placed on the pillar at the place where the pillar should be constructed. Since the bonding work is performed only on the second pillar member, the construction period can be shortened. Further, since the upper support member is attached to the joint body after the beam member is arranged at a predetermined position, the beam member can be arranged at a predetermined position by moving at least from the upper side to the lower side. Therefore, there are less restrictions on the order of arrangement of the beam member and the joint body as compared with the case where the beam member is moved along the extending direction and arranged at a predetermined position.

At least some embodiments of the present invention are methods of constructing a joint structure (51) of a wooden pillar (2) and a wooden beam (3), with a through hole (54) extending in the vertical direction. , The step of creating the joint (4) including the lower support portion (13) protruding sideways, and the first long length so as to extend upward from the upper surface of the first pillar member (6) made of wood. The member (52) is fixed to the first pillar member, and the second long member (53) is fixed to the second pillar member so as to extend downward from the lower surface of the wooden second pillar member (7). Steps to place the first pillar member to which the first long member is fixed at a position where the pillar should be constructed, and the upper end side of the first long member penetrates the joint. A step of placing the first pillar member on the upper surface of the first pillar member, a step of placing an end of a wooden beam member on the upper surface of the lower support portion, and the end of the beam member so as to be inserted through the hole. The step of fixing the upper support member to the joint so as to support the upper surface of the portion, and the second pillar member from above to below so that the lower end side of the second long member is inserted into the through hole. It is provided with a step of moving toward the joint and placing it on the joint, and a step of forming a joint between the upper end side of the first long member and the lower end side of the second long member. It is a feature.

According to this configuration, it is necessary to fill the through hole of the filler at the place where the column should be constructed, but the work of adhering the first long member to the first column member and the second long member Since the work of adhering to the second pillar member can be performed in a work yard or the like at a factory or a construction site, the work at the construction site of the pillar can be reduced and the construction period can be shortened. Further, since the upper support member is attached to the joint body after the beam member is arranged at a predetermined position, the beam member can be arranged at a predetermined position by moving at least from the upper side to the lower side. Therefore, there are less restrictions on the order of arrangement of the beam member and the joint body as compared with the case where the beam member is moved along the extending direction and arranged at a predetermined position.

According to the present invention, it is possible to provide a joint structure between a wooden column and a wooden beam that can prevent damage to the beam, and to provide a method for constructing workability of the joint structure.

Front view showing the joint structure according to the first embodiment Perspective view showing a joint structure according to the first embodiment Front view showing the joint structure according to the first embodiment Vertical cross-sectional view showing a beam at the time of an earthquake (A: comparative example, B: first embodiment) Perspective view showing the joint structure according to the second embodiment Front view showing the joint structure according to the second embodiment An exploded front view showing a joint structure according to a third embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a joint structure 1 according to the first embodiment. The joining structure 1 has a column 2, a beam 3, a joining body 4 to which the column 2 and the beam 3 are joined, and an upper support member 5 that cooperates with the joining body 4 to support an end portion of the beam 3.

The pillar 2 includes a wooden first pillar member 6 and a wooden second pillar member 7 arranged above the first pillar member 6. In each of the first pillar member 6 and the second pillar member 7, the wood fibers extend substantially in the vertical direction. The wood-based material is laminated wood, laminated single plate, or the like.

The beam 3 includes a wooden beam member 8. In the beam member 8, the wood fibers extend in the extending direction of the beam member 8. One beam member 8 is bridged between two columns 2 adjacent to each other.

It is preferable to apply prestress to the beam member 8 by the tension member 10. Each beam member 8 is provided with an insertion hole 9 penetrating along the extending direction of the beam member 8, and the tension member 10 is inserted into the insertion hole 9. The tension material 10 is made of a PC steel rod, a PC steel wire, a PC steel stranded wire, or a rod or cable made of fiber reinforced plastic such as aramid fiber, carbon fiber or glass fiber. In order to reduce the influence of the decrease in tension due to creep or the like, it is preferable to use a material having a small elastic modulus as the tension material 10. The end portion of the tension member 10 is fixed to the joint 4 by the fixing tool 11. The tension member 10 may be bonded to the beam member 8 and the joint body 4. In the example shown in FIG. 1, one or a bundle of tension members 10 applies prestress to two beam members 8 adjacent to each other in the extending direction, but one or a bundle of tension members 10 Prestress may be applied to one beam member 8 or three or more beam members 8 whose center lines in the extending direction substantially coincide with each other. Further, the tension member 10 may apply prestress only to the end portion of the beam member 8 instead of the entire beam member 8. Further, the insertion hole 9 may be curved instead of linear.

2 and 3 are a perspective view of the joining structure 1 before joining the second pillar member 7, and a front view of the joining structure 1 before joining the second pillar member 7 and the beam member 8, respectively. .. As shown in FIGS. 2 and 3, the joint body 4 is made of concrete, preferably reinforced concrete, and has a rectangular parallelepiped main body portion 12 and a protruding portion 13 projecting laterally from the main body portion 12. Including. The joint body 4 is preferably a precast concrete member. The joint body 4 is placed on the upper surface of the first pillar member 6, and the second pillar member 7 is placed on the upper surface of the joint body 4. In a plan view, the contour of the main body 12 substantially coincides with the contours of the first pillar member 6 and the second pillar member 7. As shown in the figure, the lower surface and the upper surface of the joint 4 are in direct contact with the upper surface of the first column member 6 and the lower surface of the second column member 7, respectively, but through a filler such as grout (not shown). May come into contact with each other.

The main body 12 has a plurality of through holes 14 extending in the vertical direction. A long member 15 made of a steel rod such as a deformed reinforcing bar, a steel material such as a shaped steel, or a rod made of fiber reinforced plastic is inserted into each through hole 14. The lower end of the long member 15 is inserted into the first bottomed hole 16 provided on the upper surface of the first pillar member 6, fixed to the first pillar member 6 with an adhesive 17 such as epoxy resin, and is long. The upper end portion of the material 15 is inserted into the second bottomed hole 18 provided on the lower surface of the second pillar member 7, and is fixed to the second pillar member 7 by the adhesive 17. The long member 15 constitutes a connecting portion that connects the first pillar member 6 and the second pillar member 7 so as to transmit a shearing force and a bending moment between the first pillar member 6 and the second pillar member 7. The through hole 14 is filled with a filler such as grout, and the joint body 4 is coupled to the first column member 6 and the second column member 7. Further, the main body portion 12 has a tension material through hole 19 in which the tension material 10 is inserted, which extends in the horizontal direction and communicates with the insertion hole 9.

The projecting portion 13 projects from the side surface of the main body portion 12 toward the beam member 8 to be joined, and forms a U-shape when viewed from the extending direction of the beam member 8, so that the lower support portion 20 and the beam member 8 have a U-shape. It includes a pair of side support portions 21 facing each other in the width direction. The outer surfaces of the lower support portion 20 and the pair of side support portions 21 are preferably flush with the lower surface of the main body portion 12 and the side surface of the main body portion 12 parallel to the extending direction of the beam member 8 to be joined. .. The protruding portion 13 is provided on each surface of the main body portion 12 to which the beam member 8 is to be joined.

The lower support portion 20 supports the end portion of the beam member 8 from below. Further, an upper support member 5 that supports the end portion of the beam member 8 is attached to the joint body 4 from above. The upper support member 5 is composed of a shaped steel such as angle steel (upper support member 5 on the right side in FIG. 2) or a steel material such as a flat plate, or a rectangular parallelepiped precast concrete member (upper support member 5 on the left side in FIG. 2). , Extends in the width direction of the beam member 8. For example, when angle steel is adopted as the upper support member 5, one piece of angle steel is placed on the upper surface of the end portion of the beam member 8 and is arranged above the pair of side support portions 21 and the other. A piece of steel comes into contact with the main body 12 and is fixed by a fastener 22 such as a bolt. The lower support portion 20 and the upper support member 5 work together to regulate the vertical movement of the end portion of the beam member 8. Although different types of upper support members 5 are used for the plurality of protrusions 13 in FIG. 2, the same type of upper support members 5 may be used. Further, the upper support member 5 may be fixed to the second pillar member 7 instead of the main body portion 12 or together with the main body portion 12.

The distance between the pair of side support portions 21 is equal to or greater than the width of the beam member 8. When there is a gap between the pair of side support portions 21 and the beam member 8, it is preferable to fill with a filler (not shown) such as grout. The pair of side support portions 21 regulates the end portion of the beam member 8 from moving in the width direction of the beam member 8. The protruding portion 13 may not have a U-shape, and the side supporting portion 21 may be separated from the lower supporting portion 20.

Next, a method of constructing the joint structure 1 will be described with reference to FIGS. 1 to 3.

First, a joint 4 which is a precast concrete member is created in a work yard at a factory or a construction site. Even when a precast concrete member is used as the upper support member 5, it is created in a work yard at a factory or a construction site.

Further, the first pillar member 6, the second pillar member 7, and the beam member 8 are processed in the work yard of the factory or the construction site. The first pillar member 6 is provided with the first bottomed hole 16 on the upper surface of the first pillar member 6, and the lower end side of the long member 15 is inserted into the first bottomed hole 16 to inject the adhesive 17. The long member 15 and the long member 15 are fixed to each other. Further, a second bottomed hole 18 is provided on the lower surface of the second pillar member 7. Further, the material of the beam member 8 is cut in a vertical plane passing through the central axis thereof, and the cut surface is cut so that the insertion hole 9 is formed when the two cut members are reunited, and then the cut surface is cut. The two members are bonded at the cut surface to form a beam member 8.

Next, the first pillar member 6 to which the long member 15 is fixed is arranged at a position where the pillar 2 should be constructed.

Next, the joint body 4 is moved from above to below so that the long member 15 is inserted into the through hole 14, and is placed on the upper surface of the first pillar member 6. After that, the filler is filled in the through hole 14.

Next, the beam member 8 is moved from above to below so that the end portion is inserted into the U-shaped protruding portion 13, and is placed on the upper surface of the lower support portion 20.

Next, the upper support member 5 is fixed to the joint body 4 so as to support the upper surface of the end portion of the beam member 8. The upper support member 5 is fixed to the joint 4 by a fastener 22 or the like. The tension material 10 is inserted into the insertion hole 9 of the beam member 8 and the tension material through hole 19 of the joint body 4, both ends of the tension material 10 are fixed by the fixing tool 11, and prestress is introduced into the beam member 8. To do. Either fixing of the upper support member 5 or introduction of prestress may be performed first.

Next, the second pillar member 7 is moved from the upper side to the lower side so that the upper end side of the long member 15 is inserted into the second bottomed hole 18, and is placed on the upper surface of the joint body 4.

Next, the adhesive 17 is injected into the second bottomed hole 18 so that the shearing force and the bending moment are transmitted between the first pillar member 6 and the second pillar member 7.

The lower end side and the upper end side of the long member 15 are fixed to the first pillar member 6 and the second pillar member 7 by the adhesive 17, respectively, and the bonding work is performed at the place where the pillar 2 is constructed for a long time. Only on the upper end side of the scale member 15. Therefore, the work at the construction site can be reduced and the construction period can be shortened.

Further, if it is necessary to move the beam member 8 along its extending direction and place it on the protruding portion 13, after constructing the joint 4 on one end side with respect to the beam member 8, the beam member 8 After the arrangement, it is necessary to construct the joint body 4 on the other end side with respect to the beam member 8, and the mounting order of the joint body 4 and the beam member 8 is often restricted. In the present embodiment, since the upper side of the protruding portion 13 is open, the beam member 8 can be attached to the joint body 4 from above. Therefore, the beam member 8 may be attached after the joint bodies 4 on both ends thereof are constructed, and there are few restrictions on the attachment order of the joint body 4 and the beam member 8.

The lower support portion 20 and the upper support member 5 cooperate with each other to sandwich the end portion of the beam member 8 from the vertical direction. FIG. 4 (A) shows the state of the joint structure 61 according to the comparative example at the time of an earthquake, and FIG. 4 (B) shows the state of the joint structure 1 according to the first embodiment at the time of an earthquake. In the joint structure 61 of the comparative example, the joint body 62 is not provided with the protruding portion 13, and the upper support member 5 is not provided. Therefore, the end portion of the beam member 8 is not sandwiched in the vertical direction, and cracks are likely to occur in the end portion of the beam member 8 along the extending direction at the time of an earthquake. Here, when the end portion of the beam member 8 sways up and down due to an earthquake, the contact position between the joint body 62 and the end face of the beam member 8 shifts to either the upper or lower side each time the end portion of the beam member 8 sways. A force is applied to move the end to either the top or bottom. On the other hand, in the joint structure 1 according to the first embodiment, as shown in FIG. 4 (B), the end portion of the beam member 8 is sandwiched by the lower support portion 20 and the upper support member 5 from above and below, and thus cracks. Is unlikely to occur, and movement up and down is also restricted.

If the joint between the column 2 and the beam 3 is made of wood, the joint may be destroyed by the prestress introduced into the beam member 8 due to the orthogonal anisotropy of the wood material. However, since the joint body 4 is made of concrete, the joint body 4 is not destroyed even if a prestress is applied so that a large pressure is applied between the beam member 8 and the joint body 4. Therefore, the prestress caused by the tension member 10 can be increased, and the joint between the beam member 8 and the joint 4 can be a moment resistance joint. By pressing the beam member 8 against the joint body 4 with a high pressure, the rigidity of the joint structure 1 can be ensured until the beam member 8 is separated from the joint body 4, and the bending strength of the joint structure 1 after the separation can be increased. The rigidity and proof stress of the ramen frame are increased. Further, since the rigidity of the joint structure 1 is increased, the rigidity of the entire frame can be increased. Further, the soft layer at the end of the beam member 8 is crushed by receiving pressure from the joint 4 at the stage of introducing prestress, so that a more reliable rigid joint can be obtained.

With the joint structure 1, the span of the beam 3 can be made relatively large, and a wide and open space can be created. In addition, since the rigidity and yield strength of wood-based buildings will increase, the usable range of wood will expand, contributing to the promotion of the use of wood, which is a renewable resource, especially wood-based materials. Moreover, since wood is lighter than concrete or steel, the weight of the building can be reduced.

Since tension can be introduced into the tension material 10 with a jack, it is easier to manage the tension as compared with the case where tension is introduced by torque.

Since the joint body 4 is made of concrete, the joint structure 1 maintains elasticity even during a large earthquake, and the recentering function due to unbonded prestress reduces residual deformation after the end of the earthquake. Further, since the joint body 4 is made of concrete, processing labor and the like including the end portion of the beam member 8 can be reduced.

Next, the joining structure 31 according to the second embodiment will be described with reference to FIGS. 5 and 6. The joining structure 31 according to the second embodiment is different from the first embodiment in that the joining body 32 is made of steel. In the description, the configurations common to the first embodiment are designated by the same reference numerals without description. FIG. 5 is a perspective view of the joint structure 31 before the beam member 8 and the second column member 7 are attached, and FIG. 6 is a front view of the joint structure 31 before the second column member 7 is attached.

The joint body 32 is placed on the upper end of the first pillar member 6, and is fixed to the upper surface of the first steel plate 33 at the lower end by opening vertically with the flat plate-shaped first steel plate 33 having a rectangular shape in a plan view. A steel tubular member 34 having a rectangular annular shape in a plan view, and a flat plate shape having a rectangular shape in a plan view in which a second pillar member 7 is placed on the upper surface of the tubular member 34 fixed to the upper end of the tubular member 34 on the lower surface. The second steel plate 35, the steel plate frame 36 fixed to the lower surface of the first steel plate 33 and the upper surface of the second steel plate 35, and the first steel plate are arranged so as to be orthogonal to the width direction of the beam member 8. A flat third steel plate 37, which is fixed to the upper surface of 33 and the outer surface of the tubular member 34 and is embedded in the end of the beam member 8 and has a rectangular shape or the like perpendicular to the width of the beam member 8. Including.

In a plan view, the outer contour of the tubular member 34 substantially coincides with the outer contour of the first pillar member 6 and the second pillar member 7. The first steel plate 33 projects laterally from the tubular member 34 on the side where the beam member 8 is joined to form the lower support portion 38. The lower support portion 38 and the upper support member 5 cooperate to sandwich the end portion of the beam member 8 up and down.

The first steel plate 33 and the second steel plate 35 each include through holes 39 arranged at positions that are vertically aligned with each other. The through hole 39 is arranged inside the side wall of the tubular member 34, and the intermediate portion of the long member 15 is inserted into the through hole 39 and the inside of the tubular member 34. It is not necessary to fill the inside of the through hole 39 and the tubular member 34 with a filler.

A through hole 40 for a tension member is provided on the side wall of the tubular member 34 at a position consistent with the insertion hole 9 in the extending direction of the beam member 8. The height of the tubular member 34 is approximately equal to the height of the beam member 8.

A groove (not shown) for fitting the third steel plate 37 is provided at the end of the beam member 8, and the third steel plate 37 reinforces the lower support portion 38 of the first steel plate 33 and the beam member 8 is provided. Regulate the movement of the width direction. In the illustrated example, a pair of the third steel plates 37 are provided so as to face each other in the width direction of the beam member 8, but one or three or more may be provided. Further, the third steel plate 37 may be fixed to only one of the upper surface of the first steel plate 33 and the outer surface of the tubular member 34. Further, the pair of third steel plates 37 may come into contact with the side surface of the beam member 8 instead of being embedded at the end of the beam member 8, and the beam member 8 may be brought into contact with the beam member 8 by embedding or engaging with the contact. Regulate the movement of the beam in the width direction.

The plate frame 36 is formed by combining steel plates parallel to each other in the vertical direction. The plate frame 36 fixed to the lower surface of the first steel plate 33 is fixed so as to fit the upper end portion of the first pillar member 6. The plate frame 36 fixed to the upper surface of the second steel plate 35 is provided along the side edge of the second steel plate 35. The upper support member 5 is fixed to the plate frame 36 fixed to the upper surface of the second steel plate 35 by the fastener 22, and the lower end portion of the second pillar member 7 is received inside the upper support member 5. If there is a gap between the plate frame 36 fixed to the upper surface of the second steel plate 35 and the lower end portion of the second pillar member 7, the gap is preferably filled with grout or the like. The sum of the thickness of the second steel plate 35 and the height of the plate frame 36 is approximately equal to the height of the upper support member 5.

The method of constructing the joint structure 31 will be described.

In the work yard of a factory or a construction site, the steel materials constituting the joint 32 are fixed to each other by welding or the like, and the first column member 6, the second column member 7, and the beam member 8 are processed. Similar to the first embodiment, the long member 15 is fixed to the first pillar member 6.

Next, the first pillar member 6 to which the long member 15 is fixed is arranged at a position where the pillar 2 should be constructed, and the joint body 32 is penetrated by the long member 15 through the first steel plate 33 and the second steel plate 35. It is moved from above to below so as to be inserted into the hole 39, and is placed on the upper surface of the first pillar member 6.

Next, the beam member 8 is moved from above to below and placed on the upper surface of the lower support portion 38. The second steel plate 35 protrudes slightly to the side of the tubular member 34 in order to take a welding allowance with the tubular member 34, and the beam member 8 is the second of the two joints 32 adjacent to each other. Since the length is such that it can pass between the steel plates 35, a gap is formed between the end surface of the beam member 8 and the outer surface of the tubular member 34. This gap is filled with a filler 41 such as grout. A sheath 42 or the like is arranged in the filler 41 in order to provide an insertion hole 9 for inserting the tension material 10 (see FIG. 1) and a hole matching the tension material through hole 40.

Next, the upper support member 5 is fixed to the plate frame 36 of the joint body 32 by the fastener 22 so as to support the upper surface of the end portion of the beam member 8. The tension material 10 (see FIG. 1) is inserted into the insertion hole 9 of the beam member 8 and the tension material through hole 40 of the joint body 32, and both ends of the tension material 10 are fixed by the fixing tool 11 (see FIG. 1). Then, prestress is introduced into the beam member 8. Either fixing of the upper support member 5 or introduction of prestress may be performed first.

Next, the second pillar member 7 is moved from the upper side to the lower side so that the upper end side of the long member 15 is inserted into the second bottomed hole 18, and the lower end portion is fitted into the plate frame 36. It is placed on the upper surface of the second steel plate 35.

Next, as in the first embodiment, the adhesive 17 is injected into the second bottomed hole 18, and the shearing force and the bending moment are transmitted between the first pillar member 6 and the second pillar member 7. To do so.

In the joint structure 31 according to the second embodiment, as in the first embodiment, the construction period is shortened because the bonding work of the long member 15 at the construction site is only on the upper end side, and the beam member 8 is laterally or upward. There are few restrictions on the mounting order of the joint body 32 and the beam member 8 because they can be moved downward from the joint body 32 and arranged between the joint bodies 32, and the end of the beam member 8 due to the sandwiching between the lower support portion 38 and the upper support member 5. It has the effect of preventing cracks in the part and restricting vertical movement.

Further, since the joint body 32 is made of steel instead of wood material, the prestress introduced into the beam member 8 can be increased as in the first embodiment including the concrete joint body 4, and the beam member 8 can be increased. The span can be made relatively large, the joint between the beam member 8 and the joint 4 can be a moment resistance joint, the rigidity and strength of the ramen frame are increased, and the rigidity of the entire frame is increased, which is reliable. The rigid joint can be formed, the residual deformation after the end of the earthquake is reduced, and the processing labor including the end portion of the beam member 8 is reduced.

Next, the joint structure 51 according to the third embodiment will be described with reference to FIG. 7. In the joint structure 51 according to the third embodiment, the first long member 52 and the second long member 53, which are joined to each other, are mainly used instead of the long member 15 (see FIG. 3). Different from the embodiment. In the description, the configurations common to the first embodiment are designated by the same reference numerals without description. FIG. 7 is an exploded front view of the joint structure 51.

The first long member 52 is fixed to the first pillar member 6 on the lower end side by an adhesive 17 (see FIG. 3), and the second long member 53 is fixed to the second pillar member 7 on the upper end side by the adhesive 17 (see FIG. 3). (See FIG. 3). The first long member 52 and the second long member 53 are made of steel rods such as deformed reinforcing bars, steel materials such as shaped steel, or rods made of fiber reinforced plastic.

The main body 12 of the joint 4 has a plurality of through holes 54 extending in the vertical direction. The through holes 54 are inserted into the upper end side of the first long member 52 and the lower end side of the second long member 53. A joint instrument 59 such as a steel pipe is embedded in the lower portion of the through hole 54 because it is a mechanical joint that has been widened, and the upper end side of the first long member 52 and the lower end side of the second long member 53 are They are connected to each other by mechanical joints. The through hole 54 is filled with a filler 55 such as grout. On the side surface of the main body 12, an injection hole 56 used for filling the filler 55 is provided so as to communicate with the through hole 54 near the lower end, and a discharge hole 57 for discharging the filler 55 is provided. It is provided near the upper end so as to communicate with the through hole 54. The injection hole 56 and the discharge hole 57 extend in a substantially horizontal direction.

The upper end side of the first long member 52 whose lower end side is fixed to the first pillar member 6 and the second long member 53 whose upper end side is fixed to the second pillar member 7 are connected to each other, whereby the first pillar A connecting portion 58 for connecting the first pillar member 6 and the second pillar member 7 is configured so as to transmit a shearing force and a bending moment between the member 6 and the second pillar member 7.

Next, with reference to FIGS. 1 and 7, a part different from the first embodiment in the method of constructing the joint structure 51 will be described.

In a work yard or factory at a construction site, a first bottomed hole 16 (see FIG. 3) is provided on the upper surface of the first pillar member 6, and the lower end side of the first long member 52 is inserted into the first bottomed hole 16. Then, the adhesive 17 (see FIG. 3) is injected to fix the first pillar member 6 and the first long member 52 to each other. Further, a second bottomed hole 18 (see FIG. 3) is provided on the lower surface of the second pillar member 7, and the upper end side of the second long member 53 is inserted into the second bottomed hole 18 to form an adhesive 17 (FIG. 3). By injecting (see), the second pillar member 7 and the second long member 53 are fixed to each other.

Next, the first pillar member 6 to which the first long member 52 is fixed is arranged at a position where the pillar 2 should be constructed, and the joint body 4 is further provided with the first long member 52 having a through hole 54 and a joint. It is moved from above to below so as to be inserted into the instrument 59, and is placed on the upper surface of the first pillar member 6.

After attaching the beam member 8, the upper support member 5, and the tension member 10 in the same manner as in the first embodiment, the lower end side of the second long member 53 is inserted into the through hole 54 and the joint fixture 59. As described above, it is moved from above to below and placed on the upper surface of the joint 4. At this time, in the joint device 59, the upper end of the first long member 52 and the lower end of the second long member 53 are arranged so as to be in contact with each other or close to each other.

Next, in order to fill the through hole 54 with the filler 55, the filler 55 is injected through the injection hole 56. When the filler 55 starts to be discharged from the discharge hole 57, the injection of the filler 55 is finished.

The filling work of the filler 55 is performed at the place where the pillar 2 is constructed, but the work of adhering the first long member 52 to the first pillar member 6 and the work of adhering the second long member 53 to the second pillar member 7 Since the bonding work is performed in the work yard of the factory or the construction site, the work at the construction site of the pillar 2 can be reduced and the construction period can be shortened. The portion of the joint structure 51 according to the third embodiment having the same structure as that of the first embodiment has the same effect as that of the portion in the first embodiment.

Although the description of the specific embodiment is completed above, the present invention can be widely modified without being limited to the above embodiment. The structure of the connecting portion of the third embodiment may be applied to the second embodiment.

1,31,51: Joining structure 4,32: Joined body 5: Upper support member 6: First pillar member 7: Second pillar member 8: Beam member 9: Insertion hole 10: Tension material 12: Main body 13: Protruding Parts 14, 39, 54: Through holes 15: Long material (connecting part)
17: Adhesive 18: Second bottomed hole (bottomed hole)
20, 38: Lower support part 21: Side support part 33: First steel plate 34: Cylindrical member 35: Second steel plate 36: Plate frame 37: Third steel plate 52: First long material 53: Second long Material 55: Filler 58: Connecting part

Claims (10)

It is a joint structure of wooden columns and wooden beams.
The first pillar member made of wood and
A wooden second pillar member arranged above the first pillar member,
A connecting portion in which the lower end side is fixed to the first pillar member and the upper end side is fixed to the second pillar member to connect the first pillar member and the second pillar member.
Wooden beam members and
A through hole that is arranged between the first column member and the second column member and extends in the vertical direction to insert the connecting portion, and projects laterally to support the end portion of the beam member from below. With the joint including the lower support part,
A joint structure comprising the joint body and / or an upper support member fixed to the second pillar member and supporting the end portion of the beam member from above. The joint is made of concrete or steel and is made of steel.
The joint structure according to claim 1, further comprising a tensioning material that prestresses the beam member so that pressure is generated between the side surface of the joint body and the end surface of the beam member. The joint is a precast concrete member, and the main body portion having the through hole and projecting the lower support portion from the side surface, and the main body portion of the main body portion in order to regulate the movement of the beam member in the width direction. The joint structure according to claim 1 or 2, wherein the beam member includes a pair of side support portions that project from the side surface and face each other in the width direction of the beam member. The upper support member includes a steel material or a precast concrete member extending in the width direction of the beam member, and is characterized in that the upper support member is arranged above the pair of side support portions and fixed to the joint. The joining structure according to claim 3. The joint is
A first steel plate placed on the upper end of the first pillar member and including the lower support portion, and
A steel tubular member that opens up and down and is fixed to the upper surface of the first steel plate at the lower end.
A second steel plate fixed to the upper end of the tubular member on the lower surface and on which the second pillar member is placed is included.
According to claim 1 or 2, the first steel plate and the second steel plate each include the through holes arranged at positions vertically aligned with each other inside the side wall of the tubular member. The described joint structure. The joint extends so as to be orthogonal to the width direction of the beam member, is fixed to the upper surface of the first steel plate and / or the outer surface of the tubular member, and engages with the end portion of the beam member. The joint structure according to claim 5, further comprising a matching third steel plate. The joint further includes a steel plate frame fixed to the lower surface of the first steel plate and the upper surface of the second steel plate.
The plate frame fixed to the lower surface of the first steel plate is fixed so as to fit the upper end portion of the first pillar member.
The plate frame fixed to the upper surface of the second steel plate is arranged along the side edge of the second steel plate to receive the lower end portion of the second pillar member.
The upper support member includes a steel material or a precast concrete member extending in the width direction of the beam member, and is fastened to the plate frame fixed to the upper surface of the second steel plate by a fastener. Item 5. The joining structure according to Item 5 or 6. The connecting portion includes a long member whose lower end side is fixed to the first pillar member and whose upper end side is fixed to the second pillar member, or whose lower end side is fixed to the first pillar member. Any of claims 1 to 7, wherein the material includes a material and a second long material whose upper end side is fixed to the second pillar member and whose lower end side is connected to the upper end side of the first long material. The joint structure according to one item. It is a method of constructing a joint structure between wooden columns and wooden beams.
A step of creating a joint including a through hole extending in the vertical direction and a lower support portion protruding laterally,
A step of fixing a long member to the first pillar member so as to extend upward from the upper surface of the first pillar member made of wood.
A step of arranging the first pillar member to which the long member is fixed at a position where the pillar should be constructed, and
A step of placing the joint on the upper surface of the first pillar member so that the long member is inserted into the through hole.
A step of placing the end of the wooden beam member on the upper surface of the lower support portion, and
A step of fixing the upper support member to the joint so as to support the upper surface of the end portion of the beam member.
A step of moving a wooden second pillar member having a bottomed hole on the lower surface from above to downward so that the upper end side of the long member is inserted into the bottomed hole and placing it on the joint. ,
A construction method comprising a step of injecting an adhesive into the bottomed hole. It is a method of constructing a joint structure between wooden columns and wooden beams.
A step of creating a joint including a through hole extending in the vertical direction and a lower support portion protruding laterally.
The first long member is fixed to the first pillar member so as to extend upward from the upper surface of the first wooden pillar member, and the first long member extends downward from the lower surface of the second pillar member made of wood. 2 Steps to fix the long member to the second pillar member,
A step of arranging the first pillar member to which the first long member is fixed at a position where the pillar should be constructed, and
A step of placing the joint on the upper surface of the first pillar member so that the upper end side of the first long member is inserted into the through hole.
A step of placing the end of the wooden beam member on the upper surface of the lower support portion, and
A step of fixing the upper support member to the joint so as to support the upper surface of the end portion of the beam member.
A step of moving the second pillar member from above to below and placing it on the joint so that the lower end side of the second long member is inserted into the through hole.
A construction method comprising a step of forming a joint between the upper end side of the first long member and the lower end side of the second long member.

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