JP2005232797A - Column and beam mounting structure for wooden building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure the horizontal rigidity of a column and beam mounting structure including columns and partition walls even when removed. <P>SOLUTION: The column and beam mounting structure 1 comprises the pair of columns 2, 2 opposed to each other and erected on a sill and beams 3 bridged between the heads of the columns. Straining sills 4, 4 are adhered to the opposed side faces of the pair of columns 2, 2, respectively, and a pair of reinforcing plates 5, 5 are adhered to joint portions (two places) between the head of the column 2 and the beam 3 so that the joint portions are held between both sides thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

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, but in this case, if the pillars and the partition walls are removed, The horizontal rigidity of the column beam frame that contains them will decrease. Therefore, 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 seismic 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.

  The present invention has been made in consideration of the above-described circumstances, and provides a column beam frame in a wooden building that can ensure the horizontal rigidity of the column beam frame including the columns and partition walls even when the columns and partition walls are removed. 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 the column-beam frame, a wood-based material is formed by adhering additional columns to side surfaces facing each other out of the pair of columns and sandwiching the joint between the head of the column and the joint of the beam from both sides. A pair of reinforcing plates made of is bonded to the joint.

  In order to expand the living room space on the lower floor, the present applicant, in performing the renovation work to remove the pillars and partition walls standing in the living room space, how to reduce the earthquake resistance accompanying removal of the pillars and partition walls? As a result of various researches and experiments under such a focus, in mechanical fastening such as bolts, lag screws, and dowels, two members such as columns and beams are integrated into a rigid structure. In addition to finding out that there is a limit to contact, as an alternative method, by attaching a supporting column to an existing column and adhering a reinforcing plate to the joint of the column beam, the bending rigidity of the column increases. As a result, the degree of joint at the joint is improved, and the column beam frame is brought closer to the rigid frame frame, that is, a frame with a rigid connection between the column and the beam. As a result, the in-plane horizontal rigidity of the column beam frame is increased. Found a new finding that it is possible to improve the vibration resistance of the whole wooden structure.

  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 joint portions are connected to the head portions of the columns and the joint portions of the beams. A pair of reinforcing plates made of a wood-based material is bonded to the joint portion so that is sandwiched from both sides.

  In this way, the in-plane horizontal rigidity of the column beam frame is improved by the accessory column, and the reinforcement plate is bonded to the joint between the column head and the beam, so the degree of coupling between the column and beam increases. , Closer to rigid joints.

  Therefore, even if the columns and partition walls originally existing in the column beam frame are removed, the in-plane horizontal rigidity of the column beam frame will not be reduced.

  DESCRIPTION OF EMBODIMENTS 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 showing a column beam frame in a wooden building according to the present embodiment, and FIG. 2 is an exploded perspective view showing a joint portion of the column beam frame. 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. In the pair of pillars 2 and 2, the supporting pillars 4 and 4 are bonded to the side surfaces facing each other, and the joints of the head of the pillar 2 and the beam 3 are connected to both sides (two places). A pair of reinforcing plates 5 and 5 are bonded to the joint portion so as to be sandwiched from one side.

  The pair of reinforcing plates 5 and 5 are provided at two joint portions, respectively. In the configuration shown in FIG. 1, a total of four reinforcing plates 5 are 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. Can be configured.

  The shape and size of the reinforcing plate 5 should be appropriately determined so that the reinforcing effect is as large as possible within the range that fits in the ceiling pocket. In the present embodiment, it is assumed that another beam orthogonal to the beam 3 is hung on the column 2, and the notch 11 is provided so as not to interfere with the beam.

  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.

  In the column beam frame 1 in the wooden building according to the present embodiment, of the pair of columns 2 and 2, the auxiliary columns 4 and 4 are bonded to the side surfaces facing each other, and the heads and beams of the columns 2 at two locations are bonded. A pair of reinforcing plates 5 and 5 made of a wood-based material are bonded to the joint portion 3 so that the joint portion is sandwiched from both sides.

  In this way, the in-plane horizontal rigidity of the column beam frame 1 is improved by the accessory column 4 and the reinforcing plate 5 is bonded to the joint between the head of the column 2 and the beam 3. The degree of coupling becomes higher 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 columns and partition walls existing in the surface of the column beam frame 1 are removed.

  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. When it is necessary to temporarily receive the load on the upper floor, the pillar 2 and the auxiliary pillar 4 may be bonded before the existing pillar between the pillars 2 and 2 is removed.

  In this way, the accessory post 4 can be used as a temporary support material during the renovation work.

  As an adhesive to be used, it is possible to appropriately select from any commercially available adhesive. For example, a two-component mixed epoxy resin adhesive marketed under the trade name “Sea Cadure 30” from Nippon Sika Co., Ltd. Agents 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 bonded to the joints so as to sandwich the joints between the heads of the columns 2 and the beams 3 from both sides. The same adhesive as described above may be used for bonding.

  It is desirable to secure a margin of about 55 mm or more for the column 2 or the beam 3. Needless to say, the reinforcing plate 5 is bonded not only to the pillars 2 and the beams 3 but also to the attached pillars 4 that are retrofitted.

  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 accessory column 4, and the head of the column 2 and the beam 3 are Since the reinforcing plate 5 is bonded to the joint portion, the degree of coupling between the column 2 and the beam 4 is increased, and closer to the rigid joint.

  Therefore, even if the columns and partition walls that originally existed in the surface of the column beam frame 1 are removed, the horizontal rigidity in the plane of the column beam frame 1 will not be lower than that of the previous frame. It is possible to maintain earthquake resistance.

  Specifically, when a horizontal loading test was performed using a plywood having a cross section of the pillar 2 of 105 mm × 105 mm and a thickness of 24 mm, the rigidity was about 1 m in terms of wall amount. Therefore, if the accessory column 4 having the same cross section as that of the column 2 is used, assuming that the joint between the column 2 and the beam 3 is rigidly connected, it is 3.1 m in terms of wall amount when calculated from a theoretical formula. The wall amount is 1.7 times that of a single brace of a shaku (a standard unit of housing, which is about 91 cm in the metric system).

  In the present embodiment, the description has been made on the assumption that the existing frame existing in the living room space is seismically reinforced and the column beam frame 1 is constructed. However, it is not necessarily limited to seismic reinforcement, that is, application to an existing building. Instead, it is also possible to employ the column beam frame 1 according to the present embodiment from the time of new construction.

  According to such a configuration, it is possible to design and construct a house having a large space on the lower floor. 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, a flat pillar whose width is the same as the width of the base or the beam and whose width is about twice that of the base is used. desirable. Such pillars can be made of laminated wood, for example.

  In this embodiment, the existing frame to be seismically reinforced is assumed to be present in the room space, but it can also be used for the outer wall portion. In other words, for external walls that do not require an opening, seismic reinforcement can be performed using conventional braces and seismic walls, but when a large opening is desired, for example, built-in garages or store entrances are seismic resistant. In the case of reinforcement, if the column beam frame of the present invention is applied, sufficient in-plane horizontal rigidity can be ensured even if a large opening through which a vehicle or a large number of customers can enter and leave is left. In addition, if the column beam frame according to the present invention is applied to the outer wall of the living room in contact with the terrace or solarium, the room and the terrace or solarium are integrated by the large opening provided by the column beam frame. It is possible to create a comfortable living space.

  In the present embodiment, the notch 11 is provided in the reinforcing plate 5 on the assumption that another beam orthogonal to the beam 3 is installed on the column 2, but the notch is not an essential configuration. Depending on the situation of the beam hanging on the pillar 2, this can be omitted.

  Further, in the present embodiment, the column beam frame 1 including the pair of columns 2 and 2 and the beam 3 bridged over the heads of the columns has been described as an example. However, the column beam frame according to the present invention is the above-described column beam frame. Needless to say, the present invention is not limited to the so-called beam winning structure as shown in the description and the drawings, and can be applied to a so-called column winning structure in which a column is used as a column.

It is a figure of the column beam frame in the wooden building concerning this embodiment, (a) is a front view, (b) is a vertical sectional view which meets an AA line. The disassembled perspective view of the column beam frame in the wooden building which concerns on this embodiment.

Explanation of symbols

1 Column and beam frame in wooden building 2 Column 3 Beam 4 Additional column 5 Reinforcement plate

Claims (1)

A pair of columns arranged opposite to each other and a beam bridged over the heads of the columns, and adhering columns to the side surfaces facing each other out of the pair of columns, and the heads of the columns and the A column beam frame in a wooden building, wherein a pair of reinforcing plates made of a wood-based material are bonded to the joint so that the joint is sandwiched from both sides by the joint of the beam.

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