JP2007046403A - Column and beam mounting structure for wooden building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reinforce an outer wall outdoor side and a building internal corner part while maintaining an opening. <P>SOLUTION: This column and beam mounting structure 1 for a wooden building comprises a pair of columns 2, 2 vertically installed on a base 6 opposite to each other and a beam 3 installed across the head parts of the columns. Reinforcing posts 4, 4 are adhered to their side faces facing each other and a pair of reinforcement plates 5, 5 are installed thereon so as to hold the head parts of the reinforcing posts 4 and the end part of the beam 3 from the both sides. The reinforcement plates 5 are fittedly adhered to cut recessed parts formed in the head parts of the reinforcing posts 4 and cut recessed parts formed at the end of the beam 3. The depths of the cut recessed parts and the cut recessed part are set to the thickness of the reinforcement plates 5 so that, in the fitted state, the surfaces of the reinforcement plates 5 are aligned with the surfaces of the reinforcing posts 4 and the surface of the beam 3, in other words, the reinforcing posts 4 are flush with the beam 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a column beam frame in a wooden building mainly used for renovation work.

  In homes, there is a need to secure a large space on the lower floor by changing the floor plan at the time of new construction due to changes in family structure and changes in lifestyle.

  In order to respond to such needs, renovation work will be done to remove the pillars and partition walls that are standing near the center of the living room and at the boundary of the adjacent living room. The horizontal rigidity of the column beam frame that contains them will decrease. Therefore, along with the removal of columns and partition walls, the above-described reinforcement work that increases the horizontal rigidity of the column beam frame is indispensable.

JP-A-6-99412

  Here, the horizontal rigidity of the column beam frame can be taken by providing a brace if it is an outer wall or by installing a reinforcing plywood to make it a load-bearing wall. Of course, the above measures cannot be taken because the pillars and partition walls are removed in order to secure a large space in the living room.

  Accordingly, the horizontal rigidity of the column beam frame including these columns and the like is reduced by the amount of removal of the columns and partition walls, resulting in a problem that the earthquake resistance of the whole wooden building is lowered.

  As a result of research and development from various viewpoints, the present applicants maintained such in-plane horizontal rigidity of the column beam frame even after removing the columns and partition walls that originally existed in the column beam frame. (Japanese Patent Application No. 2004-043459).

  However, in this invention, since the reinforcing plate protrudes to the side by the thickness, the opening is formed even if there is no problem in the column beam frame in the room as described above. Problems arise when the outer walls are seismically reinforced.

  In other words, in the case of an old house, there is another need to seismically reinforce the existing column beam frame regardless of the change in the floor plan, but the existing column beam frame, especially the column beam frame located on the outer wall, exists. In many cases, a large opening is provided on the surface of the structure and a sweep window or the like is fitted into the opening.

  However, since the reinforcing plate protrudes by the thickness, it is difficult to adopt the above-described invention on the outer side of the outer wall, and it is difficult to install the bearing wall by blocking the previous opening. Cause another problem.

  Moreover, since the protruding reinforcing plates interfere with each other at the corner where the outer wall and the outer wall meet at right angles, in other words, at the corner of the entrance and exit of the building, it is difficult to adopt the above-described invention. .

  The present invention has been made in consideration of the above-described circumstances, and provides a column beam structure in a wooden building that can be seismically reinforced while maintaining an opening even on the outside side of an outer wall or in a corner of a building. The purpose is to do.

  In order to achieve the above object, a column beam frame in a wooden building according to the present invention comprises a pair of columns arranged opposite to each other and a beam bridged over the head of the column as described in claim 1. In addition, a pair of reinforcing plates made of a wood-based material are attached to the side surfaces facing each other out of the pair of columns, and the heads of the supporting columns and the ends of the beams are sandwiched from both sides. It is fitted and bonded to a notch recess formed at the head of the accessory post and the end of the beam.

  Further, as described in claim 2, the column beam frame in the wooden building according to the present invention comprises a pair of columns arranged opposite to each other and a beam bridged over the head of the column, A wood-based material that attaches a beam to the lower surface and bonds the beam to side surfaces facing each other of the pair of columns, and sandwiches the head of the beam and the ends of the beam from both sides. A pair of reinforcing plates are fitted into and bonded to the notch recesses formed at the head of the accessory post and the end of the accessory beam.

  The applicant has focused on how to improve the low seismic resistance caused by the opening when performing seismic reinforcement work for outer walls with large openings. As a result of the experiment, we found that there is a limit to integrating two members such as columns and beams into a rigid connection by mechanical fastening such as bolts, lag screws, and dowels. A pair of reinforcing plates made of a wood-based material is attached so that the pillar is bonded to the pillar, and the head of the pillar and the end of the beam, or the head of the pillar and the edge of the beam are sandwiched from both sides, If it is fitted and bonded to the head of the accessory column and the end of the beam, or a notch recess formed in the head of the accessory column and the end of the accessory beam, the bending rigidity of the column is increased and the beam The degree of bonding at the joint of To improve the horizontal rigidity of the column beam frame and improve the earthquake resistance of the whole wooden building as a result of bringing the column beam frame closer to the rigid frame, that is, a frame with a rigid connection between the column and beam. I found a new finding that I can.

  That is, in the column beam structure in the wooden building according to claim 1, the auxiliary columns are respectively bonded to the side surfaces facing each other out of the pair of columns, and the head portion of the auxiliary column and the end portion of the beam are connected to both side surfaces. A pair of reinforcing plates made of a wood-based material are fitted into and bonded to the notch recesses formed in the head of the accessory post and the end of the beam so as to be sandwiched from each other.

  In addition, in the column beam frame in the wooden building according to claim 2, the accessory beam is adhered to the lower surface of the beam, and the accessory columns are respectively adhered to the side surfaces facing each other of the pair of columns. A pair of reinforcing plates made of a wood-based material is fitted into the notch recesses formed in the head of the accessory column and the end of the beam so as to sandwich the head and the edge of the beam from both sides. It is adhered with.

  In this way, the horizontal rigidity of the column beam frame is improved by the supporting pillar or by the supporting pillar and the supporting beam, and the head of the supporting pillar and the end of the beam, or the head of the supporting pillar and the supporting beam are improved. Since the reinforcing plate is bonded to the end portion, the degree of joining between the accessory post and the beam or the accessory beam is increased and closer to the rigid joint.

  Therefore, even in the case of a column beam frame having an opening, the in-plane horizontal rigidity of the column beam frame can be improved without blocking the opening.

  Further, the pair of reinforcing plates are respectively fitted into the notch recesses formed in the head of the accessory post and the end of the beam, or the notch recesses formed in the head of the accessory post and the end of the accessory beam. Since they are bonded, the column beam and the reinforcing plate are flush with each other, and the protruding of the reinforcing plate can be prevented both indoors and outdoors.

  Therefore, it can be employed also on the outdoor side of the outer wall, and the reinforcing plates do not interfere with each other even at the entrance and exit corners of the building, and the entrance and exit corners can be strongly seismically reinforced.

  Hereinafter, embodiments of a column beam frame in a wooden building according to the present invention will be described with reference to the accompanying drawings. Note that components that are substantially the same as those of the prior art are assigned the same reference numerals, and descriptions thereof are omitted.

(First embodiment)

  FIG. 1 is a front view and a vertical sectional view showing a column beam frame in a wooden building according to the present embodiment. As can be seen from these drawings, the column beam frame 1 according to the present embodiment includes a pair of columns 2 and 2 that are arranged to face each other and are erected on a base 6, and a beam 3 that is bridged over the head of the column. And a pair of reinforcements such that the pillars 4 and 4 are bonded to the side surfaces facing each other of the pair of pillars 2 and 2, and the head of the pillar 4 and the end of the beam 3 are sandwiched from both sides. Plates 5 and 5 are attached.

  The accessory pillar 4 is a retrofitted reinforcing member having a height from the top end of the base 6 to the lower end of the beam 3 and is formed so that the pillar width (in the wall thickness direction) is the same as the width of the pillar 2. .

  The pair of reinforcing plates 5 and 5 are provided at the column beam joints at the heads of the supporting columns 4 and 4 and at the ends of the beam 3, respectively. In the configuration shown in FIG. Is used. Here, the reinforcing plate 5 is composed of a triangular plate material made of a wood-based material. For example, a structural plywood having a thickness of about 24 mm or a laminated plate having a thickness of about 24 to 35 mm to which a solid wood lamina is bonded. Alternatively, it can be cut out from 2 × 10 materials (commercially available wood having a thickness of 38 mm and a width of 235 mm).

  Here, as shown in FIG. 2, the reinforcing plate 5 is fitted into and bonded to a notch recess 11 formed in the head of the supporting post 4 and a notch recess 12 formed in the end of the beam 3. There is a notch recess so that the surface of the reinforcing plate 5 is aligned with the surface of the supporting post 4 and the surface of the beam 3 in other words, in other words, to be flush with the supporting post 4 and the beam 3. 11 and the depth of the notch recess 12 are set to the thickness of the reinforcing plate 5.

  In the column beam frame 1 in the wooden building according to the present embodiment, the pillars 4 and 4 are bonded to the side surfaces facing each other out of the pair of pillars 2 and 2, respectively, and as shown in FIG. A pair of reinforcing plates 5 and 5 are formed at the notches 11 and 11 formed at the head of the supporting post 4 and at the end of the beam 3 so as to sandwich the head of 4 and the end of the beam 3 from both sides. The cutout recesses 12 and 12 are respectively fitted and bonded.

  In this way, the in-plane horizontal rigidity of the column beam frame 1 is improved by the supporting pillar 4 and the reinforcing plates 5 and 5 are bonded to the joint portion between the head of the supporting pillar 4 and the beam 3 from both sides. The degree of joint between the accessory post 4 and the beam 3, and the pillar 2 and the beam 3 is increased, and closer to the rigid joint. In that sense, it can be said that the reinforcing plate 5 corresponds to a gusset plate used for a steel frame.

  A procedure for constructing the column beam frame 1 in the wooden building according to the present embodiment as a renovation work will be described below.

  First, the notch recessed part 11 and the notch recessed part 12 are formed in the accessory pillar 4 and the beam 3, respectively.

  Next, planar contact is applied to the contact surfaces of the pillars 2 and the accessory pillars 4 as necessary to prepare for the bonding process.

  Next, the accessory columns 4 and 4 are bonded to the inner side surfaces of the columns 2 and 2, respectively, and the in-plane bending rigidity is increased.

  The adhesive to be used can be appropriately selected from any commercially available epoxy resin adhesives. For example, a two-component mixed epoxy marketed under the trade name of “Sea Cadure 30” by Nippon Seika Co., Ltd. Resin adhesive can be used. Such an adhesive has high viscosity and does not spill, so it has good workability. If it is not in winter, it will develop strength up to about 90% of the final strength in 3 days. There are advantages such as not.

  Next, a pair of reinforcing plates 5 and 5 are formed on the head of the supporting post 4 so as to be sandwiched from both sides at the joint between the head of the supporting post 4 and the end of the beam 3 at two locations. The cut-out recesses 11 and 11 and the cut-out recesses 12 and 12 formed at the ends of the beam 3 are respectively fitted and bonded. The same adhesive as described above may be used for bonding.

  As described above, according to the column beam frame 1 in the wooden building according to the present embodiment, the in-plane horizontal rigidity of the column beam frame 1 is improved by the auxiliary column 4, and the heads of the auxiliary columns 4 and 4 and Since the reinforcing plates 5 and 5 are bonded to the end portions of the beam 3 so as to sandwich the reinforcing plates 5 and 5, the degree of joining between the splint 4 and the beam 3 is increased and closer to the rigid joining.

  Therefore, even in the column beam frame 1 having an opening, the in-plane horizontal rigidity of the column beam frame 1 can be improved without blocking the opening.

  Further, the pair of reinforcing plates 5 and 5 are fitted and bonded to the notch recess 11 formed in the head of the accessory post 4 and the notch recess 12 formed in the end of the beam 3, respectively. The pillars 2, the supporting pillars 4 and the beams 3 and the reinforcing plate 5 are flush with each other, and the protruding of the reinforcing plate 5 can be prevented both indoors and outdoors.

  Therefore, as shown in FIG. 3, it can be adopted on the outside side of the outer wall, and the reinforcing plates 5 do not interfere with each other even at the entrance and exit corners of the building, and the entrance and exit corners are strongly seismically reinforced. Is also possible.

  In the present embodiment, the description has been made on the assumption that the existing beam frame is seismically reinforced and the column beam frame 1 is constructed. However, the present invention is not necessarily limited to seismic reinforcement, that is, application to an existing building. It is also possible to employ the column beam frame 1 according to the present embodiment. In the case of a new construction, instead of the structure in which the accessory pillar 4 is bonded to the pillar 2, for example, one flat is the same as the width of the base or the beam, and the other width (in the wall thickness direction) is approximately twice that of the flat. It is desirable to use columns. Such pillars can be made of laminated wood, for example.

(Second Embodiment)

  Next, a second embodiment will be described. Note that components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 4 is a front view and a vertical sectional view showing the column beam frame in the wooden building according to the present embodiment. As can be seen from these drawings, the column beam frame 41 according to the present embodiment includes a pair of columns 2 and 2 that are arranged to face each other and are erected on the base 6, and a beam 3 that is bridged over the head of the column. Adhering a beam 42 having the same beam width as that of the beam 3 to the lower surface of the beam 3, and adhering the beam columns 4 and 4 to the side surfaces facing each other of the pair of columns 2 and 2, respectively. A pair of reinforcing plates 5 and 5 are attached so as to sandwich the head of the accessory pillar 4 and the end of the accessory beam 42 from both side surfaces.

  The accessory beam 42 is a retrofitted reinforcing member having an internal dimension of the columns 2 and 2 as a length. On the other hand, the accessory pillar 4 is a retrofitted reinforcing member having a height from the top end of the base 6 to the lower end of the accessory beam 42 so that the pillar width (in the wall thickness direction) is the same as the width of the pillar 2. It is formed.

  The pair of reinforcing plates 5 and 5 are respectively provided at the column beam joints at the heads of the supporting columns 4 and 4 and at the ends of the supporting beams 42. In the configuration shown in FIG. 5 is used.

  Here, as shown in FIG. 5, the reinforcing plate 5 is fitted into and bonded to a notch recess 11 formed at the head of the accessory post 4 and a notch recess 51 formed at the end of the accessory beam 42. In the fitted state, the surface of the reinforcing plate 5 is aligned with the surface of the accessory post 4 and the surface of the accessory beam 42, in other words, to be flush with the accessory pillar 4 and the accessory beam 42. The depths of the cutout recess 11 and the cutout recess 51 are set to the thickness of the reinforcing plate 5.

  In the column beam frame 41 in the wooden building according to the present embodiment, a beam 42 having the same beam width as the beam 3 is bonded to the lower surface of the beam 3 and the pair of columns 2 and 2 face each other. The supporting pillars 4 and 4 are respectively bonded to the side surfaces, and as shown in FIG. 5, the pair of reinforcing plates 5 and 5 are attached so that the head of the supporting pillar 4 and the end of the supporting beam 42 are sandwiched from both sides. The recesses 11 and 11 formed at the heads of the pillars 4 and the notch recesses 51 and 51 formed at the ends of the beam 42 are respectively fitted and bonded.

  By doing so, the in-plane horizontal rigidity of the column beam frame 41 is improved by the supporting columns 4 and 42, and the reinforcing plates 5 and 5 are attached to the joint between the head of the supporting column 4 and the supporting beam 42 from both sides. Since they are bonded, the joining degree between the accessory pillar 4 and the accessory beam 42, and hence the pillar 2 and the beam 3, is increased, and closer to the rigid joint.

  A procedure for constructing the column beam frame 41 in the wooden building according to the present embodiment as a renovation work will be described below.

  First, the notch recess 11 and the notch recess 51 are formed in the accessory post 4 and the accessory beam 42, respectively.

  Next, planar contact (canna) is applied to the contact surface of the beam 3 and the beam 42 as necessary to prepare for the bonding process. The same applies to the contact surfaces of the pillar 2 and the accessory pillar 4.

  Next, the accessory beam 42 is bonded to the lower surface of the beam 3, and the accessory columns 4 and 4 are bonded to the inner side surfaces of the columns 2 and 2, respectively, to increase the in-plane bending rigidity.

  Next, a pair of reinforcing plates 5 and 5 are formed on the head of the accessory post 4 so as to be sandwiched from both sides at the joint between the head of the accessory post 4 and the end of the accessory beam 42 at two locations. The cut-out recesses 11 and 11 and the cut-out recesses 51 and 51 formed at the ends of the beam 42 are respectively fitted and bonded.

  As described above, according to the column beam frame 41 in the wooden building according to the present embodiment, the in-plane horizontal rigidity of the column beam frame 41 is improved by the supporting columns 4 and 42, and the supporting columns 4 and 4. Since the reinforcing plates 5 and 5 are bonded so as to be sandwiched between the head and the end of the beam 42, respectively, the degree of bonding between the beam 4 and the beam 42 is increased and closer to the rigid connection.

  Therefore, even in the column beam frame 41 having an opening, the in-plane horizontal rigidity of the column beam frame 41 can be improved without blocking the opening.

  Further, the pair of reinforcing plates 5 and 5 are fitted and bonded to the notch recess 11 formed at the head of the accessory post 4 and the notch recess 51 formed at the end of the accessory beam 42, respectively. Therefore, the pillar 2, the accessory pillar 4, the beam 3, the accessory beam 42 and the reinforcing plate 5 are flush with each other, and the protrusion of the reinforcing plate 5 can be prevented both indoors and outdoors.

  Therefore, it can be employed also on the outdoor side of the outer wall, and the reinforcing plates 5 do not interfere with each other even at the entrance and exit corners of the building, and the entrance and exit corners can be strongly seismically reinforced.

  In the present embodiment, the description has been made on the assumption that the existing beam frame is seismically reinforced and the column beam frame 41 is constructed. However, the present invention is not necessarily limited to seismic beam reinforcement, that is, application to an existing building. It is also possible to employ the column beam frame 41 according to the present embodiment.

  Since the static force test was done in order to verify the effect of the joining structure of the wooden frame member concerning the present invention, the outline is explained below.

  FIG. 6 shows a specimen used for the test. As can be seen in the figure, the test piece is a reinforcing plate labeled as a gusset plate, with the supporting pillar and the supporting beam bonded to each other in a construction surface formed by a pair of pillars and beams spanning the pillars. Is a column beam frame that is bonded to the joint between the beam and the beam, and corresponds to the second embodiment.

  Here, the base is bay hiba 105 × 105, the existing column is cedar 105 × 105, the reinforcing column (auxiliary column) is white wood 105 × 105, the existing beam is bay pine 105 × 180, and the reinforcing beam (auxiliary beam) is white wood 105 ×. 150.

  When such a specimen was loaded with a static force of alternating positive and negative alternation (repeated three times with the same deformation), the wall amount was 2.12 m.

  Even if this is a column beam frame having a large opening with a span of 3,640 mm, according to the column beam frame of the present invention, for example, a single-wall bearing wall (double wall magnification at 91 cm, wall amount conversion) This means that the wall is better than 1.82m).

  By the way, in the conventional column beam structure, since all the joints are regarded as pin joints, they cannot be bearing walls, and the wall amount is zero when calculating the wall amount. In comparison, it can be said that the column beam frame according to the present invention is an epoch-making frame structure.

It is a figure of the column beam frame in the wooden building concerning a 1st embodiment, (a) is a front view and (b) is a vertical sectional view which meets an AA line. The exploded perspective view in a column beam junction part. The schematic plan view at the time of applying to a building access corner. It is a figure of the column beam frame in the wooden building concerning 2nd Embodiment, (a) is a front view, (b) is a vertical sectional view which follows a BB line. The exploded perspective view in a column beam junction part. It is a figure of the test body used for the static force test, (a) is a front view, (b) is the vertical sectional view which follows CC line.

Explanation of symbols

1,41 Pillar beam frame 2 in wooden building Column 3 Beam 4 Supporting column 5 Reinforcement plate 11 Notch recess 12 Notch recess 42 Anchor beam 51 Notch recess

Claims (2)

A pair of columns arranged opposite to each other and a beam bridged over the heads of the columns, and each of the pair of columns is bonded to side surfaces facing each other, and A pair of reinforcing plates made of a wood-based material are fitted into and bonded to the notch recesses formed at the head of the accessory post and the end of the beam so as to sandwich the end of the beam from both sides. A column-beam frame in a wooden structure. It consists of a pair of columns arranged opposite to each other and a beam bridged over the head of the column, and a beam is attached to the lower surface of the beam, and a beam is attached to the side of the pair of columns facing each other. A pair of reinforcing plates made of a wood-based material are formed on the head of the accessory post and the end of the accessory beam so as to be bonded to each other and sandwich the head of the accessory pillar and the end of the accessory beam from both sides. A column beam structure in a wooden building, characterized by being fitted and bonded to each of the notch recesses.

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