JP2005213902A - Mounting structure of brace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a functional brace structure enabling inexpensive and easy construction by a simplified structure. <P>SOLUTION: In the brace 12 arranged diagonally in a space surrounded by columns 22a and 22a of a framework and a bed sill 21 or a beam 23, brackets 11 and 11 are fixed to diagonal angle parts of the space to fix one-side ends of connecting plates 51 and 51 to the brackets 11 and 11 with bolts 36 and 36, and slits 12a and 12a are formed at both ends of the brace 12 to insert other ends of the connecting plates 51 and 51 to the slits 12a and 12a. To connect the connection plates 51 to the brace 12, pin holes 51b, 51b, 12b and 12b are formed to insert drift pins 37 and 37 therethrough. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a staggered structure, and more particularly to a staggered concept used for a wall of a building (for example, a wooden house).

Many of the wooden houses built before the construction of the 1950 Building Standards Act are very fragile, and as a result, most of the houses that collapsed in the January 1995 earthquake (the Great Hanshin Earthquake) It was a wooden house built before construction.
One of the reasons why the wooden houses mentioned above are vulnerable to earthquakes is that there were many houses where the reinforcement streaks were not attached to the wall.
In addition, the results of investigating collapsed houses immediately after the occurrence of an earthquake show that even if a house has a staggered difference, the number of attached streaks is insufficient, or the struggle can prevent the house from collapsing. We know that there were many houses that did not.

In view of recent large earthquakes, there is an increasing demand for improving the earthquake resistance of houses and other buildings, not limited to disaster areas, and in recent years, many techniques for improving earthquake resistance have been proposed.
In order to improve the earthquake resistance of a building, it is effective to construct struts that function reliably and to increase the number of struts to be constructed. Measures for improving seismic resistance, such as providing different strata or increasing the number thereof, can be applied particularly to existing buildings that are difficult to rebuild, and the range of adaptation is wide and generally easy to adopt.

  For example, when fixing the striation directly to a beam or a column of a building as a conventional strut difference construction method, in the case of a flat stagger, in addition to fixing with bolts, flatten multiple screw nails, etc. The strut difference and the beam or the column are fastened structurally. In addition, in the case of the prismatic streak difference, the single-surface shear joining is used in which the streak is fastened to the beam or the column with a bolt.

  In addition, when fixing a streak to a beam or column of a building via a mounting member, the mounting member and the streak are fastened with a bolt or the like, and the mounting member and a beam or a column of the building are fastened with a bolt or the like. . In particular, with respect to the mounting member, various techniques have been proposed in the past for the purpose of simplifying the construction, improving the earthquake resistance by increasing the strength of the mounting member or stabilizing the fixing of the streak. For example, there are techniques described in Patent Document 1 and Patent Document 2.

JP-A-8-277588 JP 2000-73446 A

However, in the case of a misaligned mounting method that does not use mounting members, the horizontal load applied to the shaft assembly is more directly transmitted to the misalignment when horizontal shaking occurs in the building during an earthquake or the like. There is a possibility that the difference in the streaks cannot follow the deformation of the external shaft group, resulting in brittle fracture, and the difference in the streaks cannot function well.
In addition, even in buildings where the stiffening is fixed using the mounting members as described above, the tensile force and compression are staggered as the shaft assembly receives horizontal force during earthquakes and repeats small deformations. The force is repeatedly applied, which may cause looseness at the joint between the attachment member and the streak or the beam or column of the building, and the streak may not function properly. In addition, the greater the number of striations provided in a building, the better the earthquake resistance, but if the mounting members and staggers are complex structures, the cost for construction and production will increase and the number of streaks will increase. There is concern that this will lead to a significant cost increase.
As described above, if the streak cannot function well, when a large earthquake occurs, the building strength that can withstand strong horizontal compressive force and tensile force cannot be maintained. There is a possibility that it will lead to a major accident such as the collapse of things.
In view of this, the present invention proposes a staggered structure that has a simple structure, is inexpensive and simple to construct, and can retain its function.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

That is, in claim 1,
In a staggered arrangement in a space surrounded by a column of pillars and a base or beam, a bracket is fixed to a diagonal corner of the space, and a plate-like connecting member for connecting the stagger and the bracket. One end is fastened to the bracket with a bolt, and the other end side of the connecting member is inserted into a slit formed at both ends of the streak, and a drift pin is inserted into a pin hole formed between the connecting member and the streak so that the connecting member And fix the difference.

  As effects of the present invention, the following effects can be obtained.

In claim 1,
The drift pin is deformed when the shaft is in an earthquake, etc., which contributes to prevention of brittle fracture due to different muscles. Further, loosening of the wrong muscle is prevented.
In this way, loosening of the wrong muscle and brittle fracture are suppressed, and the function of the wrong muscle can be maintained, so that when the earthquake occurs, the muscle can withstand strong compressive force and tensile force. Only the strength can be exhibited. As a result, the possibility of a major accident such as collapse due to an earthquake is reduced.
Furthermore, the number of joints can be reduced by reducing the number of joints by reducing the number of joints by using a drift pin two-sided shear joint with a high yield strength per location for joining the streak and the beam or column of the building. Can be achieved.

Next, embodiments of the invention will be described.
FIG. 1 is a front view of a shaft assembly composed of columns and beams provided with streaking via a connection plate and drift pins according to an embodiment of the present invention, and FIG. 2 shows a state where the connection plate is attached to the shaft assembly composed of columns and beams. FIG. 3 is a diagram illustrating a connection structure between the bracket and the connection plate, FIG. 4 is a partial cross-sectional side view illustrating the connection structure between the bracket and the connection plate, and FIG. It is a figure which shows another form.
FIG. 6 is a front view showing a state in which a horizontal force is applied to the shaft assembly and deformed, and FIG. 7 is a diagram showing a state of elastic deformation of the drift pin.

  In FIG. 1, reference numeral 21 denotes a base placed horizontally on the foundation, 22 a is a through pillar or corner pillar, 22 b is a pipe pillar, and 23 is a beam. The foundation 21 is fixed on the foundation by anchor bolts 34, 34,... Projecting upward from the foundation, and through columns 22a and tube pillars 22b are appropriately spaced on the foundation 21 to join the metal fitting 33. It is erected through.

  One side end portion of the beam 23 is fixed to the upper and lower middle portions and the upper portion of the through column 22a via the joining hardware 40, and the beam 23 is horizontally mounted between the through columns 22a. The joining hardware 40 is fastened and fixed to the through pillar 22a by bolts 32, 32..., And the joining hardware 40 and the beam 23 are connected and fixed by bolts, pins (drift pins) or the like.

  Further, a plurality of tube columns 22b, 22b,... Are joined at appropriate intervals between the through columns 22a and 22a, between the beam 23 and the base 21, and between the beam 23 and the beam 23. It is being fixed via the hardware 31,31 .... The joining hardware 31 is fixed to the beam 23, the base 21, and the pipe column 22b by bolts or pins.

  As described above, the base is composed of the base 21, the through pillar 22a, the pipe pillar 22b, the beam 23, and the like. The substantially rectangular space defined by the beam 23 and the base 21 or the beam 23 and the beam 23 on the upper and lower sides and the column 22a and the tube column 22b or the tube column 22b and the tube column 22b on the left and right sides, The different streaks 12 are arranged as reinforcement members in a diagonal line.

In the mounting structure for the misalignment 12 according to the present invention, the bracket 11 which is a connection hardware fixed on the shaft assembly side, the connection plate 51 as a connecting member for connecting the misalignment 12 and the bracket 11, the bolt 34. 35 and the drift pins 37 and 37 are used to fix the streak 12 to the shaft set.
In FIG. 1, one streak is disposed between the adjacent through column 22 a and the tube column 22 b, and this streak has a sufficient function in general residential construction. However, it is also possible to arrange the two lines so as to intersect each other depending on the size of the building, the distance between the columns, and the like.

As shown in FIGS. 1 to 4, the bracket 11 is fixed to a joint portion, that is, a corner portion between the beam 23 or the base 21 and the column 22 a or the tube column 22 b.
The bracket 11 has a “U” shape in a side view and a plan view, that is, a shape in which two faces of the hexahedron are opened. -11a is drilled. Further, the other surface of the bracket 11 is provided with a bolt hole 11b for fixing to the pillars 22a and 22b with a bolt 35, and the other surface is provided with a bolt 39 on the beam 23 or the base 21. Bolt holes 11c for fixing are formed.
The brackets 11 and 11 arranged above and below the beam 23 can be fixed by a single bolt 39, and the bracket 11 arranged on the base 21 can be fixed together with the anchor bolt 34. Is possible.

Further, as shown in FIG. 5, a bracket 41 integrally formed by joining a bracket 22 and a metal fitting 40 for connecting the column 22 a and the beam 23 or the base 21 is formed on the metal fitting 40 and the bracket 11. It is also possible to substitute.
For example, the bracket 41 is formed in a “U” shape in a plan view, and through holes 41 a and 41 a which are bolt holes for supporting a streak are formed in the upper part and the lower part. A locking portion 41b for locking the provided bolt is formed, and fixing pin holes 41c, 41c,... Are drilled in the midway between the through holes 41a and 41a.

  The connection plate 51 is made of a metal such as a steel plate. As shown in FIGS. 2 and 3, a bolt hole 51 a for fixing to the bracket 11 with a bolt 36 is formed at one end of the connection plate 51. A plurality of pin holes 51b and 51b are formed in the other end portion for fixing to the streak 12 with the drift pins 37 and 37.

  Further, the streak 12 is made of wood or the like, and has a length slightly shorter than the length of the connection plate 51 at a middle position in the thickness direction at both end portions, that is, a thickness that can store the connection plate 51, that is, a connection Slits 12 a and 12 a having a width slightly larger than the thickness of the plate 51 are formed. And the pin hole 12b * 12b is drilled in the location which overlaps with the slit 12a of the streak 12 according to the position of the pin hole 51b * 51b of the said connection plate 51. As shown in FIG.

  The drift pin 37 inserted through the pin hole 12b is a drift pin having a taper that can be fixed by being driven into the hole. In the present embodiment, two drift pins 37 and 37 are used for a pair of joints with the streak 12 with the connection plate 51 to form a two-surface shear joint. Since the drift pins 37 have a high yield strength per place and do not require a large number for connection, not only the machining of the misalignment 12 with the connection plate 51 is simplified, but also the number of connectors can be reduced. As a result, the assembly work can be simplified and the construction can be rationalized (reduction of man-hours).

Next, a method for arranging the streak 12 will be described.
First, brackets 11 and 11 are attached to the corners in the diagonal direction of the rectangular space formed by the columns 22a and 22b, the beam 23, and the base 21, and the columns 22a (or 22b) and bolts 35 and 39 and nuts are used. It is fixed to the beam 23 or the base 21. Then, the connecting plates 51 and 51 are inserted into the slits 12a and 12a formed at both ends of the streak 12 so that the pin hole 51b of the connecting plate 51 and the pin hole 12b of the staggered line 12 are matched, and these holes 51b and 12b are aligned. The drift pins 37 are inserted into the two to connect them.

Then, the bolt holes 51a and 51a drilled at both ends of the connection plates 51 and 51 are matched with the bolt holes 11a and 11a drilled in the brackets 11 and 11, and bolts are inserted into these bolt holes 51a and 11a. Insert 36 and tighten with nuts.
However, after the connection plate 51 is first pivotally connected to the bracket 11 by the bolt 36, the connection plate 51 is inserted into the slit 12a, and the connection plate 51 and the slit 12a are connected by the drift pin 37. It is also possible to adopt a construction method in which the bolt 36 is fastened and fixed.

As described above, the streak 12 and the connection plate 51 are formed by two-surface shear bonding using the drift pins 37. As a result, as shown in FIG. 6 (a), when the compressive force is applied to the misalignment 12 and the misalignment joined body A of the connection plates 51 and 51 disposed at both ends thereof, conversely, FIG. As shown in (b), even when a tensile force is applied, the force acts on the drift pins 37, 37... Connecting the streak 12 and the connection plate 51.
The drift pins 37, 37,... Can be elastically deformed to some extent, and when a compressive force or a tensile force is applied to the muscular joint A, the drift pins 37, 37,. By deforming, it is possible to absorb the deformation of the muscle joint A.

  That is, when a compressive force is applied to the muscular joint A, the length of the muscular joint A is shortened by elastic deformation of the drift pins 37, 37, as shown in FIG. When the compression force is released following the deformation of the shaft assembly, the drift pins 37, 37... Are elastically deformed again to restore the original length of the joint A. Further, when a tensile force is applied to the cross-jointed joint A, the drift pins 37, 37... When the force is released, the drift pins 37, 37,... Are elastically deformed again to restore the original length of the different muscle joint A.

  In a relatively small earthquake, the drift pins 37, 37,... Can be elastically deformed to cope with the compressive force and tensile force applied to the cross-jointed joint A. When the deformation required for the body A exceeds the elastically deformable range of the drift pins 37, 37,..., The drift pins 37, 37,. Corresponds to tensile force.

Thus, in the staggered difference 12 arranged diagonally in the space surrounded by the shaft columns 22a and 22b and the base 21 or the beam 23,
Brackets 11 and 11 are fixed to diagonal corners of the space,
One end of a connection plate 51, 51, which is a plate-like connection member for connecting the line 12 and the bracket 11, 11, is fastened to the bracket 11, 11 with bolts 36, 36,
The other end of the connection plate 51/51 is inserted into slits 12a / 12a formed at both ends of the streak 12 and drift pins 37 / 51b are inserted into the pin holes 12b / 51b formed in the connection plate 51/51 and the streak 12. 37... Are inserted to fix the connection plates 51 and 51 and the streak 12 so that
The drift pins 37, 37... Are deformed in the same way for both the compressive force and the tensile force applied to the misalignment 12, thereby deforming the shaft assembly caused by a horizontal force applied during an earthquake or the like. Can be absorbed, the brittle destruction of the misalignment 12 can be prevented, the good function of the misalignment 12 can be maintained, and the damage and collapse of the building can be prevented or reduced.

The front view of the axis | shaft group which consists of the pillar and beam which provided the streak difference via the connection plate and drift pin which concern on the Example of this invention. The front view which shows a mode that the connection plate was attached to the axial group which consists of a column and a beam. The figure explaining the connection structure of a bracket and a connection plate, and a streak. Side surface partial sectional drawing explaining the connection structure of a bracket, a connection plate, and a streak. The figure which shows another form of the metal fitting for joining. The front view which shows the state which applied the force of the horizontal direction to the shaft group and deform | transformed. The figure which shows the mode of the elastic deformation of a drift pin.

Explanation of symbols

11 Mounting member (bracket)
12 Streaks 12a Slit 22a / 22b Pillar 23 Beam 37 Drift pin 51 Connection plate

Claims (1)

In a staggered arrangement in a diagonal space in a space surrounded by a column of pillars and foundations or beams,
Fix the brackets to the diagonal corners of the space,
Fasten one end of the plate-like connecting member to connect the streak and the bracket to the bracket with a bolt,
The other end side of the connecting member is inserted into a slit formed at both ends of the streak, and a drift pin is inserted into a pin hole formed between the connecting member and the streak to fix the connecting member and the streak. Mounting structure with different lines.

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