JP2009221779A - Pillar reinforcement device of wooden building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pillar reinforcement device having a novel structure which is resistant to the occurrence of secular changes such as loosening of a fastening nut, and which makes possible easy retrofit execution. <P>SOLUTION: A reinforcing base frame 1 is fixed to the pillar 8 and the base concrete 6, and the reinforcing base frame 1 is provided with a hollow part 2 of which the face width gradually becomes smaller in the direction of the sides opposite to each other. Then the hollow part 2 of the reinforcing base frame 1 is filled with portland cement mortar 9, and the end of a bar steel 10 which extends between the reinforcing base frames 1, 1 is inserted to the Portland cement mortar 9 through an opening end on the sides opposite to each other of the reinforcing base frame 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a column reinforcing device for a wooden building.

  For example, a metal reinforcement frame is fixed to each surface of the column side and foundation concrete side with bolts, and a tightening bolt is screwed onto the reinforcement frame 杆, and a tightening nut screwed into this is screwed and tightened. There is a structure that copes with the pulling force that is applied to the pillar caused by the above (for example, Patent Document 1).

JP 10-169210 A

  The above-mentioned conventional one secures a reinforced state by tightening the tightening nut, so that the nut is loosened and a jaw is generated in the securing, which may impair the reinforcing performance.

  The present invention focuses on the disadvantages of such a conventional example, and an object thereof is to provide a column reinforcing device with a novel structure that is less likely to change with time such as loosening of a nut and can be easily retrofitted. It was created.

  A reinforcing base frame having a hollow portion whose expected width is gradually narrowed in a lateral direction facing each other is fixed to the pillar and the foundation concrete, and the reinforcing base frame is attached to the solidified material filled in the hollow portion of the reinforcing base frame. The end portion of the steel bar straddling between the reinforcing base frames is inserted through the opening ends on the opposite sides.

  According to the present invention, when a pulling force is applied to a column during an earthquake or the like, the filled solidified material filled in the reinforcing base frame becomes a tapered wedge-shaped hardened lump between the reinforcing base frames. Therefore, it is possible to obtain a column reinforcing device using a filled solidified material and a steel bar having excellent pull-out resistance. In addition, there is little change over time such as loosening of nuts, easy retrofitting, absorption of steps between the surface of the pillar and the foundation concrete, construction of a novel structure with seismic strength, and a novel structure that strengthens pillars in wooden buildings Can provide.

  The drawings show an embodiment of a column reinforcing device for a wooden building according to the present invention. FIG. 1 is a front view, FIG. 2 is a sectional view taken along the line 1a-a, FIG. 3 is a perspective view of a reinforcing base frame, and FIG. FIG. 5 is a partial cross-sectional view of the state at the time of construction, and FIG. 5 is another partial cross-sectional view of the state at the time of construction.

  In the figure, reference numeral 1 denotes a metal reinforcing base frame. The reinforcing base frame 1 is composed of a central rectangular hollow portion 2 and flat mounting portions 3 and 3 projecting on both sides of the hollow portion 2, and is a horizontally long metal plate. A metal frame having a substantially hat-shaped steel cross section is welded to a horizontally long metal plate at the wing portion of the metal frame, and the hollow portion 2 has an inner diameter from one open end 2 'in the vertical direction to the other open end. The diameter of the hollow portion 2 of the embodiment is gradually reduced in the 2 ″ direction, and the front portion 2a constituting the hollow portion 2 is moved forward from the one opening end 2 ′ to the other opening end 2 ″. As the width of the prospective direction gradually decreases from one opening end 2 'to the other opening end 2' with an inclined shape gradually approaching the rear piece 2b (consisting of the horizontally long metal plate) facing the piece 2a. On the other hand, the side pieces 2c and 2c constituting the hollow portion 2 are opposed to each other in the direction of finding, and the other opening end 2 is formed from the one opening end 2 '. In the form of an inclination gradually approaching as far as ′, the diameter gradually decreases from one opening end 2 ′ to the other opening end 2 ″ even in the width in the finding direction, but gradually decreases in the prospective direction width. Therefore, the shape of the hollow portion need not be limited to a rectangular tube shape as in the embodiment, and the shape of the cylinder or the like is not limited.

  The reinforcing base frame 1 includes a foundation concrete 6 by passing through screw holes 5 and 5 ′ through a through hole 4 provided in the attachment portion 3, and a column 8 erected on the foundation concrete 6 via a base 7. Fastened in place, the reinforcing base frame 1 on the foundation concrete 6 side and the reinforcing base frame 1 on the column 8 side (indicated by reference numeral 1A in the figure) are arranged on the opposite sides of the other end 2 ″ side. That is, one reinforcing base frame 1 provided with a hollow portion 2 whose expected width gradually narrows in a direction approaching each other is stopped on the foundation concrete 6 side, and the other reinforcing base frame 1 (1A) is stopped on the column 8 side. The end portions 10a and 10a of the steel bar 10 are inserted into the Portland cement mortar 13 filled in the reinforcing base frames 1 and 1 through the opening ends 2 ″ and 2 ″ of the hollow portion 2 facing each other. Steel bar 10 is interposed between foundation concrete 6 and column 8 through reinforcing base frames 1 and 1 So, we are connected to them in rod steel 10.

  In order to obtain the apparatus of the embodiment, the reinforcing base frames 1 and 1 (1A) are fixed to the base concrete 6 and the pillar 8 at appropriate positions using the screw nails 5 and 5 'as described above. , 1 (1A), the end 10a is inserted and the steel bar 10 is combined between the reinforcing base frames 1 and 1, and the combination work is performed on each of the foundation concrete 6 and the column 8 respectively. The bottom surface of the reinforced base frame 1, 1 (1A) in the fixed state is combined with the action of temporarily fixing the lid plates 18 and 18 'to the base frame 1, 1 (1A) to close the bottom plate. The combination state of 10 is held by an appropriate support means, and the Portland cement mortar 13 is filled into the hollow portion 2 of each reinforcing base frame 1, 1 (1A) from above, and after hardening, the support means of the steel bar is removed, Also, the embodiment can be realized by removing the lid plates 18 and 18 '(not necessarily required). It is to obtain a location.

  The lid plates 18 and 18 'used for obtaining the example device were temporarily fixed to the reinforcing base frame 1 using an adhesive tape 19 as shown in FIGS. 4 and 5, but the means can be freely selected. The cover plate 18 used in the reinforcing base frame 1 fixed to the column 8 shown in FIG. 4 includes a notch 18a, and the bar 10 is engaged with the notch 18a to avoid interference of the bar 10. Thus, the Portland cement mortar 13 is prevented from falling off from the hollow portion 2 by being superposed on the reinforcing base frame and temporarily fixed.

  In addition, the steel bar is a so-called deformed steel bar used for a reinforcing bar, which is intended to use a hard-to-remove material from the Portland cement mortar 13 after hardening. Any form can be used as long as it can be expected to have an effect that it is difficult to come off, such as one provided with a hook (becomes an anchor), one bent, or one in which a nut is screwed onto the end of a bar rod. However, even if it is a straight rod, there is no inconvenience if it is integrated with Portland cement mortar, so the right or wrong can be determined by testing.

  In the examples, Portland cement mortar was used, but the composition has a fluidity that can be filled into the hollow portion (wedge-shaped gap) 2 regardless of the composition, and after filling, it means a material that can solidify and hold the anchor. It is sufficient that the material is solid (after solidification in the hollow portion 2 and needs to be strong enough to hold the anchor so that it does not come off, and the strength is generally about 20 N / mm 2 or more in terms of compressive strength). In addition to the Portland cement mortar of the examples, hydraulic cement such as alumina cement and mixed cement, epoxy resin, MMA resin, etc. can be used, and aggregate, extender pigment, fluidizing material, thickening as appropriate. An agent or the like can be added. Further, the fluidity of the filled solidified material can be used as long as it can be filled in the hollow portion 2 such as mortar, slurry, grease, or paste.

Front view. FIG. The perspective view of a reinforcement base frame. Sectional drawing of a part of the state at the time of construction. Sectional drawing of the other part of the state at the time of construction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reinforcement base frame 2 Hollow part 6 Foundation concrete 8 Column 10 Steel bar 13 Portland cement mortar

Claims (1)

  A reinforcing base frame having a hollow portion whose expected width is gradually narrowed in a lateral direction facing each other is fixed to the pillar and the foundation concrete, and the reinforcing base frame is attached to the solidified material filled in the hollow portion of the reinforcing base frame. A column reinforcing device for a wooden building, in which end portions of steel bars straddling between the reinforcing base frames are inserted through opening ends on the opposite sides.

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