JP2009030299A - Reinforcing glued laminated wood - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide reinforcing glued laminated wood which is simple in structure, and contributes to improvement in strength against bending stress and strength against shearing stress. <P>SOLUTION: According to the structure of the reinforcing glued laminated wood, two or more wooden plate members are laminated on each other, and grooves each having a semi-circular cross section for housing therein reinforcing steel rods, are formed in a laminated surface of each wooden plate member such that locations of the grooves match with each other, followed by boring shearing reinforcing bolt insertion holes through the wooden plate member in a plate thickness direction at regular intervals in a lengthwise direction of the wooden plate member. Then the reinforcing steel rod that is to be housed in the groove formed in the wooden plate member and has a plurality of protrusions formed on a surface thereof, is provided. The external diameter of the reinforcing steel rod is larger than an internal diameter of a groove having a circular cross section, that is secured by laminating the wooden plate members on each other. Then shearing reinforcing bolts are inserted into the respective shearing reinforcing bolt insertion holes to fasten the wooden plate members together, and the reinforcing steel rod is fixed to the wooden plate members laminated on each other in a manner biting the protrusions in the wooden plate members. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a reinforced laminated material used as a structural member such as a column or a beam in the building field.

Conventionally, as a laminated material used as a structural member in the construction field, one composed of only a wooden member is generally used. Japanese Patent Laid-Open No. 11-333809 discloses a reinforced laminated material in which a stiffened steel material is integrated with a wooden member via an adhesive to improve the bending rupture strength.
JP 11-333809 A

  However, for laminated timber made up of only wooden members, the load and bending strength that can be withstood are determined by the strength of the wooden members used, and there are also weak parts such as joints in the wooden members, and the quality is stable. There is a disadvantage of not. If high strength is required, increasing the cross-section of the laminated wood will increase the weight of the laminated wood, resulting in increased internal stress due to the loading load and earthquake stress. . In the case of a reinforced laminated material that integrates the stiffened steel material of the wooden member with an adhesive disclosed in JP-A-11-333809, the integrity of the wooden member and the stiffened steel material depends on the adhesive strength of the adhesive, When a load or an external force is applied, the wooden member and the stiffened steel material are likely to be displaced, and a problem that the reinforcing effect of the stiffened steel material cannot be exhibited sufficiently occurs.

  An object of the present invention is to provide a reinforced laminated material that improves the strength against bending stress and shear stress with a simple configuration, which solves the above problems.

  In order to solve the above-mentioned problem, the first invention of the present invention is a semi-circular cross-section in which two or more layers of plate-like wooden members are laminated in a reinforcing laminated material, and a rod-like reinforcing steel material is accommodated on the laminated surface of the plate-like wooden members. Are formed so that their positions coincide with each other, and shear reinforcement bolt insertion holes that penetrate in the plate thickness direction at regular intervals in the plate length direction of the plate-like wooden member are formed. The outer diameter including protrusions of a rod-shaped reinforcing steel member having a plurality of protrusions formed on the surface accommodated in the groove is made larger than the inner diameter of a circular groove formed by laminating a cross section, and the shear reinforcement bolt insertion hole is subjected to shear reinforcement. A bolt is inserted and fixed so that a plurality of projections of the fastening rod-shaped reinforcing steel material bite into the laminated plate-like wooden member.

  The second invention is characterized in that, in the reinforcing laminated material of the first invention, the bar-shaped reinforcing steel material on which the plurality of protrusions are formed is a deformed reinforcing bar.

  The third aspect of the present invention is the reinforcing laminated material of the first or second aspect of the present invention, wherein both ends of the bar-shaped reinforcing steel material on which the plurality of protrusions are formed protrude from the ends of the plate-like wooden member, Both ends are fastened and fixed to the end of the plate-like wooden member by a fixing tool.

  According to a fourth aspect of the present invention, in the reinforced laminated material according to any one of the first to third aspects of the invention, an adhesive is applied to a groove having a semicircular cross section formed on the laminated surface of the plate-like wooden member. .

In the reinforced laminated material of the present invention, two or more layers of plate-like wooden members are laminated, and a semicircular groove having a semicircular cross section for accommodating a rod-like reinforcing steel material is aligned with the laminated surface of the plate-like wooden members, respectively. Forming a shear reinforcement bolt insertion hole penetrating in the plate thickness direction at regular intervals in the plate length direction of the plate-like wooden member, and forming a plurality of protrusions on the surface accommodated in the groove of the plate-like wooden member A plurality of tightening rod-shaped reinforcing steel materials by inserting a shear reinforcement bolt into the shear reinforcement bolt insertion hole and making it larger than the inner diameter of a groove having a circular cross section formed by laminating the outer diameter including protrusions of the rod-shaped reinforcement steel material formed with By fixing the protrusions so as to bite into the laminated plate-like wooden member, the strength against bending stress increases, the shear reinforcement bolt resists the shearing force, and each of the protrusions of the rod-like reinforcement steel material Part By biting into, the deviation of the plate-shaped wooden members and the rod-shaped reinforcing steel by shearing force strongly prevented, may be greater reinforcing glulam strength against shearing force.
By using a bar-shaped reinforcing steel material having a plurality of protrusions as a deformed reinforcing bar, it becomes easy to obtain various types of bar-shaped reinforcing steel materials having different diameters.
Both ends of the bar-shaped reinforcing steel material formed with a plurality of protrusions protrude from the end of the plate-shaped wooden member, and both ends of the protruding bar-shaped reinforcing steel material are fastened and fixed to the ends of the plate-shaped wooden member by a fixing tool. The integration of the rod-shaped reinforcing steel material and the plate-shaped wooden member becomes stronger.
With the configuration in which the adhesive is applied to the groove formed on the laminated surface of the plate-like wooden member, the adhesive force of the adhesive can further prevent the plate-like wooden member and the rod-shaped reinforcing steel material from being displaced due to the shearing force.

  Embodiments of the present invention will be described with reference to the drawings. 1-4 is a figure which shows one Embodiment of the reinforcement laminated material of this invention.

  In this embodiment, the reinforced laminated material 1 is formed by laminating at least two plate-like wooden members 2. As the plate-like wooden member 2, either a ground plate or a plywood may be used. However, since the effective use of thinned wood for maintaining the forest environment is an important issue, the use of thinned wood is cheap, and its use is also low from the standpoint of maintaining the forest environment. desired. The grooves 3 having a semicircular cross-section extending in the plate length direction for accommodating the rod-shaped reinforcing steel material 5 are partly laminated on a part of the laminated surface of the laminated plate-like wooden members 2 so that the positions thereof coincide with each other. At least one is formed in the width direction. At least one shear reinforcement bolt insertion hole 4 penetrating in the plate thickness direction of the laminated plate-like wooden member is formed at a constant interval in the plate length direction. The number of laminated plate-like wooden members 2 to be laminated, the number of grooves 3 having a semicircular cross section that accommodates a reinforcing steel material, the number of shear reinforcement bolt insertion holes 4 in the plate width direction, and the shear reinforcement bolt insertion holes The interval in the plate length direction of 4 is set according to the strength desired according to the application of the reinforcing laminated material 1.

  As the rod-shaped reinforcing steel material 5, one having a plurality of protrusions 6 formed on the outer surface thereof is used. As the rod-shaped reinforcing steel material 5 in which the plurality of protrusions 6 are formed, it is easy to obtain the material by using a deformed reinforcing bar as shown in FIG. However, any steel material may be used as long as a plurality of protrusions are formed on the surface without being limited to deformed reinforcing bars. The outer diameter including the protrusions 6 of the rod-shaped reinforcing steel material 5 on which the plurality of protrusions 7 are formed is slightly larger than the inner diameter of the groove having a circular cross section formed by matching the laminated surfaces of the grooves 3 having a semicircular cross section. In this embodiment, the length of the rod-shaped reinforcing steel material 5 is substantially the same as the plate length of the plate-like wooden member 2.

  An adhesive such as an epoxy resin may be applied in advance to the inner wall of the groove 3 having a semicircular cross section formed in the plate-like wooden member 2. A plate-shaped wooden member 2 is stacked by accommodating a rod-shaped reinforcing steel material 5 having a plurality of protrusions 6 formed in a groove 3 having a semicircular cross section. Next, the shear reinforcement bolt 7 is inserted into the shear reinforcement bolt insertion hole 4, the nut 8 is screwed onto the female screw at one end of the shear reinforcement bolt 7, and the laminated plate-like wooden member 2 is tightened in the thickness direction. By tightening the shear reinforcement bolts 7 in the plate thickness direction, the protrusions 6 of the rod-shaped reinforcing steel material 5 protruding slightly outward from the inner diameter of the circular cross-sectional grooves formed by lamination are the semicircular cross-sections of the respective plate-like wooden members 2. It bites into the inner wall of the shaped groove 3 and is fixed. At this time, the adhesive previously applied to the inner wall of the groove 3 having a semicircular cross section fills the gap between the rod-shaped reinforcing steel material 5 and the inner wall of each semicircular groove 3 and solidifies to form the plate. The reinforced laminated material 1 is integrated with the wooden member 2.

  By integrating the bar-shaped reinforcing steel material 5 and the plate-shaped wooden member 2, the strength against bending stress increases. The shear reinforcement bolt 8 resists the shearing force, and the protrusion 6 of the rod-shaped reinforcing steel material 5 bites into the inner wall of the groove 3 having a semicircular cross section of each plate-like wooden member 2 and the rod-shaped reinforcement by an adhesive. Due to the adhesive force between the steel material 5 and the plate-like wooden member 2, the displacement of the plate-like wooden member 2 and the rod-shaped reinforcing steel material 5 due to the shearing force is strongly prevented, and the reinforced laminated material 1 having a high yield strength against the shearing force is obtained. be able to.

  FIG. 5 is a diagram showing another embodiment of the reinforced laminated material 1 of the present invention.

  In this embodiment, the length of the bar-shaped reinforcing steel material 5 is set to be slightly longer than the plate length of the plate-like wooden member 2, and the lengths of both ends project from the end portions of the plate-like wooden member 2. The configuration of stacking the plate-like wooden member 2, housing the rod-shaped reinforcing steel material 5 in which the protrusions 6 are formed in the groove 3 coated with the adhesive, and fastening in the plate thickness direction by the shear reinforcing bolt 7 is shown in FIGS. Since it is the same as that of the embodiment, the description is omitted.

  A female screw is engraved in the portion protruding from the end of the laminated plate-like wooden member of the bar-shaped reinforcing steel material 5. After the tightening is completed by the shear reinforcement bolts 7 of the laminated plate-like wooden members 2, the pressing plates 8 are inserted into the rod-like reinforcing steel materials 5 protruding from both ends of the laminated plate-like wooden members, and both ends of the rod-like reinforcing steel materials A fixing tool 9 such as a nut is screwed onto the female screw engraved on the plate, and is fastened and fixed to both ends of the plate-like wooden member 2 via a pressing plate 8. By tightening and fixing the both ends of the plate-like wooden member 2 and the rod-shaped reinforcing steel material 5 by the fixing tool 9, a stronger integrated material can be obtained, and the reinforcing laminated material 1 having higher strength against bending stress and shearing force can be obtained. Can do. In this embodiment, a nut for screwing the fixing device 9 to the female screw is used. However, the rod-shaped reinforcing steel material 5 is not engraved on both ends of the rod-shaped reinforcing steel material 5 formed with the plurality of protrusions 7. It is also possible to use a reinforcing bar fixing tool in which a cylindrical body having an inner diameter larger than the outer diameter of the rod-shaped reinforcing steel material is inserted into both ends, and a wedge material is inserted into the gap between the cylindrical body and the rod-shaped reinforcing steel material 5 for fixing.

It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention.

Explanation of symbols

  1: Reinforced laminated material, 2: Plate-like wooden member, 3: Cross-sectionally semicircular groove, 4: Shear reinforcement bolt insertion hole, 5: Rod-like reinforcement steel material, 6: Projection, 7: Shear reinforcement bolt, 8: Presser plate , 9: Fixing tool

Claims (4)

Two or more layers of plate-like wooden members are laminated, and a groove having a semicircular cross section for accommodating a rod-shaped reinforcing steel material is formed on the laminated surface of the plate-like wooden members so that the positions thereof coincide with each other. Protrusion of a rod-shaped reinforcing steel material in which a shear reinforcement bolt insertion hole that penetrates in the plate thickness direction is formed at regular intervals in the plate length direction, and a plurality of projections are formed on the surface accommodated in the groove of the plate-like wooden member A plate-like wood in which a plurality of protrusions of a tightening rod-shaped reinforcing steel material are stacked by inserting a shear reinforcement bolt into the shear reinforcement bolt insertion hole, the outer diameter including Reinforced laminated lumber characterized by being fixed so as to bite into a member. The reinforcing laminated material according to claim 1, wherein the bar-shaped reinforcing steel material on which the plurality of protrusions are formed is a deformed reinforcing bar. Both end portions of the bar-shaped reinforcing steel material on which the plurality of protrusions are formed protrude from the end portions of the plate-shaped wooden member, and both end portions of the protruding bar-shaped reinforcing steel materials are fastened and fixed to the end portions of the plate-shaped wooden member by a fixing tool. The reinforced laminated material according to claim 1 or 2, wherein The reinforcing laminated material according to any one of claims 1 to 3, wherein an adhesive is applied to a groove having a semicircular cross section formed on a laminated surface of the plate-like wooden member.

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