JP2007303105A - Aseismatic reinforcing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aseismatic reinforcing structure cutting down an installation cost while having sufficient earthquake resistance, simple in structure and dispensing with work such as welding. <P>SOLUTION: The aseismatic reinforcing structure installed in a room of an existing house comprises steel sills 11 formed of H-shape steel; steel columns 3 formed of square pipe steel, with the lower ends arranged at the corner parts of the steel sills; steel beams 12 formed of H-shape steel and arranged at the upper ends of the respective steel columns; first fastening members 5 each formed into a right-angled isosceles triangle from a thick steel plate, wherein two side parts with a right-angled part held between are bent at a right angle to one side to form fastening parts 5a, 5b, and the fastening part on one side is fastened to the steel sill or the steel beam while the fastening part on the other side is fastened to the steel column; second fastening members 6 each formed in a right-angled isosceles triangle from a thick steel plate, wherein two side parts with a right-angled part held between are bent at a right angle to one side to form fastening parts 6a, 6b, and the respective fastening parts are fastened to the adjacent steel sills or steel beams; and bolts 15 and nuts 16 for fastening the first and second fastening members, steel sills, steel beams and steel columns. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a seismic reinforcement structure that is installed in a desired room of an existing wooden house to reinforce the seismic strength.

  Japanese houses are traditionally timbered wooden houses, especially when they are old and have deteriorated for a long time, and when large earthquakes occur, beams, girders, columns, etc. are subjected to loads exceeding the seismic resistance. There is a risk that the entire house will collapse due to the load on the roof. As a countermeasure, it is necessary to remodel the current building foundations, beams, and poles into earthquake-resistant structures, but there is a problem that it takes a lot of cost and time.

  Therefore, an evacuation room with a steel structure having an opening communicating with the adjacent room is installed in a desired room of the existing building, and the evacuation room includes a steel frame base installed on the base floor of the room to be installed, A plurality of steel columns coupled to at least the corners of the steel frame foundation, a steel frame beam coupled to the upper end of the steel column, and a plurality of steel frames fixed between the steel frame foundation, the steel column and the steel beam There has been proposed a house with an earthquake-proof evacuation room having a structure including a wall panel (for example, see Patent Document 1).

Alternatively, a seismic chamber with a steel structure with an opening communicating with the adjacent room is installed in the desired room of the existing building, and this seismic room has a shape and dimensions corresponding to the room to be installed and is on the base floor of the room A steel frame base installed in the base, a plurality of steel columns connected to each side of the steel frame base, steel frame beams connected to the upper ends of the steel columns, and between adjacent steel columns and It has a steel frame that connects the steel frame base between the steel columns and between the steel frame beams, a floor is provided on the steel frame base, and a surface wall is stretched on the interior display surface of the steel columns and the steel wall. In addition, a house with an earthquake-resistant room having a structure in which a surface ceiling is stretched on the lower surface of a steel frame beam has been proposed (see, for example, Patent Document 2).
Utility Model Registration No. 3019502 (pages 10-13, FIG. 4) Utility Model Registration No. 3025985 (pages 13 to 18, FIG. 9)

  The effectiveness of earthquake-proof evacuation rooms and houses with earthquake-proof rooms has been recognized and is gradually becoming widespread. However, the proposed earthquake-proof evacuation room and the house with the earthquake-proof room have a complicated structure, so there are a large number of parts, and as a result, the number of parts to be assembled increases, which takes time for assembly at the construction site. There is also a problem of high cost.

  It is essential that the seismic reinforcement has strength, but it is also important to reduce the installation cost. Therefore, having a sufficient strength and suppressing the installation cost is a big problem in spreading the seismic structure.

  As a structure to reduce the installation cost, it is possible to arrange a steel welded evacuation box consisting of a ceiling plate, four columns, a floor plate and one side plate in the building. It is necessary to weld, and there is a problem of fire and the like due to welding, so it is difficult to install in a wooden house.

  An object of the present invention is to provide a seismic reinforcement structure that has sufficient seismic resistance, reduces installation costs, has a simple structure, and does not require any work such as welding.

In order to achieve the above object, the seismic reinforcement structure according to the present invention is a seismic reinforcement structure that is installed and reinforced in a desired room of an existing house,
Bolt insertion holes are formed at both ends of the horizontal upper part and the central vertical part made of H-shaped steel, and are installed on the foundation formed in the one chamber to constitute a steel frame foundation,
Bolt insertion holes corresponding to the bolt insertion holes in the upper part are formed at the lower ends of the side surfaces that are made of square pipe steel and are arranged perpendicular to the corners of the steel frame foundation and facing the ends of the adjacent steel foundations. Steel columns,
A bolt insertion hole is formed at the upper end of each steel column corresponding to the bolt insertion hole formed on the opposite side surface of the steel column at both ends of the horizontal lower portion and the central vertical portion made of H-shaped steel. A steel beam constituting a steel frame beam,
The steel plate, the steel beam, and the steel column are formed at each fastening part by forming two fastening parts by forming a right isosceles triangle shape with a thick steel plate and bending the two sides sandwiching the right angle part at right angles to one side. A bolt insertion hole is formed corresponding to the bolt insertion hole of the steel plate, one fastening portion is fastened to the upper end portion of the steel base or the lower end portion of the steel beam, and the other fastening portion is the steel frame. A first fastening member fastened to a corresponding side of the column;
The steel plate is formed into a right-angled isosceles triangle shape, the two sides sandwiching the right-angled portion are bent at right angles to one side to form two fastening portions, and the right-angled portion is cut corresponding to the steel column. A bolt insertion hole is formed in each fastening part corresponding to the bolt insertion hole of the steel base and the steel beam, and one side fastening part is fastened to the end of the vertical part of the steel base or steel beam. A second fastening member whose side fastening portion is fastened to a vertical end portion of the steel base or steel beam orthogonal to the steel base or steel beam;
A bolt and a nut for fastening the fastening portion of the first and second fastening members, the steel base, the steel beam, and the steel column are provided.

  Four steel foundations are arranged on a solid foundation constructed in a room to be seismically strengthened in an existing house, forming a quadrangle, and both ends of each vertical part of adjacent steel foundations are bolts and nuts using second fastening members To fix the steel frame base. Steel columns are arranged at the corners of the steel frame foundation, and the ends of the steel frames and the side surfaces of the steel columns opposite to the ends of the steel frame are fixed by bolts and nuts with a first fastening member. Set up. And the upper end of the opposite side of the steel column suspended from the corner of the steel frame foundation and both ends of the steel beam are fixed with bolts and nuts by the first fastening members, respectively, and both ends of the vertical part of the adjacent steel beam Is fixed with a bolt and a nut by a second fastening member.

  The steel foundations forming the steel frame foundations and the steel beams forming the steel frame beams are fastened by a second fastening member having a right-angled isosceles triangle, and the steel frame foundation, the steel frame beam, and the steel column are By fastening with the first fastening member having an equilateral triangle, the strength against the load from the up / down / left / right direction and the oblique direction is ensured. Further, by fastening each fastening portion with a bolt and a nut, no welding work is required, and indoor work in a wooden building can be performed safely.

  Moreover, the seismic reinforcement structure according to claim 2 of the present invention is the seismic reinforcement structure according to claim 1, wherein the second fastening member that fastens the steel bases constituting the steel frame foundations is the foundation. It is characterized by being fixed to anchor bolts installed in

  The second fastening member forming the steel frame foundation is fixed to the anchor bolt of the foundation to fix the steel frame foundation. Thereby, it is possible to install the seismic reinforcement structure firmly in a desired room.

  Further, the seismic reinforcing structure according to claim 3 of the present invention is the seismic reinforcing structure according to claim 1 or 2, wherein the steel frame beams are diagonally different from each other between the second fastening members. It is characterized by being connected by.

  It is possible to further improve the strength by providing a difference in the steel frame beam of the seismic reinforcement structure, and it is possible to obtain sufficient durability.

  According to the present invention, the steel base and the steel beam are formed of H-shaped steel, the steel column is formed of rectangular pipe steel, and these are fastened by the first and second fastening members having a right isosceles triangle shape. Strength can be given. In particular, by making the first and second fastening members into right-angled isosceles triangles, it is extremely effective against the load in the oblique direction, and the seismic strength can be improved. Moreover, it is not necessary to use welding at all by fastening each fastening part with a bolt, and indoor work in a wooden building can be performed safely. Furthermore, the structure is extremely simple and the cost can be reduced, and the installation cost can be greatly reduced in combination with the simple assembly work.

  Hereinafter, the earthquake-proof reinforcement structure concerning embodiment of this invention is demonstrated based on drawing. FIG. 1 is a perspective view of a seismic reinforcement structure according to the present invention. The seismic reinforcement structure 1 is installed in a desired room of an existing house and is reinforced, and is formed in the one room. A steel frame base 2 installed on a solid foundation (not shown), four steel columns 3 whose lower ends are suspended from the four corners of the steel frame base 2, and a steel frame disposed at the upper ends of these four steel columns The beam 4 and the steel frame base 2 and the steel column 3, the first fastening member 5 for fastening the steel column 3 and the steel frame beam 4, respectively, the steel bases 11 of the steel frame base, and the steel beams 12 of the steel frame beam It consists of a second fastening member 6 to be fastened, and a muscle difference (bar crossing) 7 provided on the steel frame beam 4.

  The steel frame base 2 is formed by fastening both ends of the four steel bases 11 with the second fastening members 6. As shown in FIG. 2, the steel frame base 11 is formed of an H-shaped steel, and includes a horizontal upper part 11a, a lower side part 11b, and a central vertical part 11c. For example, two bolt insertion holes 11d are formed at predetermined intervals along the longitudinal direction at both ends of one side (inner side) edge of the upper portion 11a, and two bolt insertion holes 11e are formed at both ends of the vertical portion 11c. It is formed at predetermined intervals along the longitudinal direction.

  The steel column 3 is formed of square pipe steel, and two bolt insertion holes 3d and 3e are provided in the vertical direction, for example, two at a predetermined position above the lower end of the adjacent side surfaces 3a and 3b and the height of the steel base 11. Are formed at predetermined intervals. Similarly, bolt insertion holes are formed at predetermined intervals along the vertical direction at predetermined positions below the height of the steel beam 3 (height of the steel beam 12) at upper ends (not shown) of the side surfaces 3a and 3b. Yes. That is, in the steel column 3, the bolt insertion holes are formed symmetrically at predetermined positions on both upper and lower sides of the inner side surfaces 3a and 3b. Thereby, the steel column 3 can be used without distinction between the upper and lower sides.

  The steel frame beam 4 is formed by fastening each end portion of the four steel beam 12 with the second fastening member 6. The steel beam 12 is formed in the same manner as the steel frame base 11 shown in FIG. 2 and can be used in a state where the upper and lower sides of the steel frame base 11 shown in FIG. Moreover, the code | symbol corresponding to each site | part corresponding to the steel frame base 11 of the steel beam 12 is attached | subjected in FIG.

  As shown in FIG. 2, the first fastening member 5 has a right-angled isosceles triangle shape, and two sides sandwiching the right-angled part are bent at right angles to one side (inner side) to form fastening parts 5a and 5b. . Bolt insertion holes 5d and 5e are formed at positions corresponding to the bolt insertion holes 11d of the upper portion 11a of the steel frame 11 and the bolt insertion holes 3d and 3e of the steel column 3 in the fastening portions 5a and 5b. These bolt insertion holes 5d and 5e are formed at symmetrical positions and can be used without distinction between the upper, lower, left and right. The first fastening member 5 is formed by pressing a thick plate (about 6 mm) steel plate.

  As shown in FIG. 2, the second fastening member 6 has a right-angled isosceles triangle shape, and two sides sandwiching the right-angled part are bent at right angles to one side (inner side) to form fastening parts 6a and 6b. The part has a shape cut out at a right angle corresponding to the side surfaces 3 a and 3 b of the steel column 3. And bolt insertion hole 6d, 6e is formed in each fastening part 6a, 6b in the position corresponding to the bolt insertion hole 11e of the vertical part 11c of the steel frame base 11, respectively. These bolt insertion holes 6d, 6e are formed at symmetrical positions, and can be used without distinction between the upper, lower, left, and right. Further, a hole 6f is formed in the approximate center of the triangular flat plate portion 6c. This hole 6f is for fastening with an anchor bolt or a streak. Similar to the first fastening member 5, the second fastening member 6 is formed by pressing a thick plate (about 6 mm) steel plate.

  The case where the earthquake-proof reinforcement structure 1 mentioned above is installed in one room of the existing wooden house is demonstrated below. Dismantle and remove the floor and ceiling of an existing wooden house that should be seismically reinforced, and construct a solid foundation. Then, as shown in FIG. 1, four steel bases 11 are formed on the solid foundation, and a quadrangle is formed so as to form a right angle with a gap in which the steel column 3 enters between each end of adjacent steel bases 11. As shown in FIG. 2, the second fastening member 6 is disposed between the vertical portions 11c of the adjacent steel bases 11, and is planted on the solid foundation in the hole 6f of the planar triangular portion 6c. Insert an anchor bolt (not shown).

  2 and 3, the fastening portions 6a and 6b are brought into contact with the inner side surfaces of the vertical portions 11c and 11c, and bolts for fastening are respectively inserted into the corresponding bolt insertion holes 11e and 11e and 6d and 6e. 15 is inserted from the outside of the vertical portion 11c, and the nut 16 is screwed and temporarily fixed inside. Further, a nut is screwed onto the anchor bolt and temporarily fixed. In this way, after assembling the four steel bases 11, the bolts 15 are firmly tightened with a torque wrench with a predetermined torque, and the fastening member 6 and the steel base 11 are firmly fastened and fixed. Further, a nut is fastened to the anchor bolt to fix the fastening member 6 to the solid foundation. In this way, the steel frame base 2 is formed. The bolt 15 is a high tension bolt or a bolt called a structural tracer type high strength bolt (JFE torque bolt, commonly called shear bolt).

  Next, the fastening portion 5b of the first fastening member 5 is brought into contact with the lower end portions of the side surfaces 3a and 3b of the steel column 3, and the bolts 15 are inserted into the corresponding bolt insertion holes 3d, 3e and 5e, 5e. 16 is screwed and temporarily fixed. In this case, the bolt 15 is inserted from the opening end 3 c of the steel column 3, the shaft portion is projected outward, and the nut 16 is screwed. The bolt 15 is inserted from the inside of the steel column 3 and the nut 16 is screwed to the outside, so that the bolt 15 can be easily tightened. Similarly, the fastening portions 5b of the fastening members 5 are temporarily fixed to the upper ends of the side surfaces 3a and 3b of the steel column 3 respectively.

  Next, the fastening portions 5a of the first fastening members 5 that are temporarily fixed to the side surfaces 3a and 3b by arranging the steel column 3 in the gaps between the end portions of the adjacent steel foundations 11 are provided on the steel foundations 11 and 11, respectively. Place on the upper parts 11a, 11a, align the bolt insertion holes 11d of each upper part 11a with the bolt insertion holes 5d of the fastening part 5a, insert the bolts 15 from below, and screw the nuts 16 upward. Temporarily fix. The bolt 15 is inserted from the lower side of the upper portion 11a and the nut 16 is screwed from the upper side, so that the bolt 15 can be easily tightened. In this way, the steel column 3 is assembled to the four corners of the steel frame base 2.

  And the bolt 15 of each fastening member 5 is fastened with a torque wrench while confirming the verticality of each steel column 3 and fixed vertically. In this way, the steel column 3 is suspended from the four corners of the reinforcing bar assembly 2. Each steel column 3 is disposed adjacent to the inside of the four corner columns of the one chamber. Thereby, the lost area of the said one room becomes only the corner part of the vicinity of the existing pillar, and the substantially conventional indoor space can be ensured.

  Next, both ends of the lower part 12a of the steel beam 12 shown in FIG. 1 are placed on the fastening part 5a (see FIG. 3) of the first fastening member 5 temporarily fixed to the steel pillars 3 on both sides, and each bolt The bolt 15 is inserted into the insertion hole from the upper side, and the nut 16 is screwed to the lower side to be temporarily fixed. In this way, the four steel beams 12 are assembled to the upper ends of the four steel columns 3. Next, as in the case shown in FIG. 3, the second fastening member is disposed between the vertical portions 12 c of the adjacent steel beams 12 and temporarily fixed with the bolts 15 and the nuts 16.

  Next, the bolts 15 and nuts 16 are tightened and fixed with a torque wrench while confirming the level of each steel beam 12 to form the steel frame beam 4. Then, as shown in FIG. 1, streaks 7 and 7 are respectively attached between the second fastening members 6 at the corners facing the diagonal line of the steel frame beam 4. The different streaks 7 are stretched on these fastening members 6 through the holes 6f of the triangular portions 6c of the fastening members 6 opposite to each other, and are fastened by turnbuckles 7a.

  The seismic reinforcement structure 1 is a second structure in which the four steel bases 11 forming the steel frame base 2 and the four steel beams 12 forming the steel frame beam 4 form a right isosceles triangle and have a flat plate portion 6c. Are fastened by the first fastening member 5 having a flat plate portion 5c that is equiangular with the steel frame base 2 and the steel frame beam 4 and the steel column 3 at right angles. The strength against the load from the oblique direction is ensured, and further, the strength is further improved and sufficient durability can be obtained by providing the braiding 7 on the steel frame beam 4. Moreover, by fastening each fastening portion with the bolt 15 and the nut 16, no welding work is required and indoor work in the wooden building can be performed safely.

  As described above, the seismic reinforcement structure 1 is installed in a room of an existing house. Then, as shown in FIG. 1, a plurality of fasteners 13 fixed to the upper portion 11 a of the reinforcing bar base 11 are fixed to a base (not shown) of the one chamber, and a plurality of fixing members fixed to the upper portion 12 a of the reinforcing bar 12 are fixed. The metal fitting 14 is fixed to a beam (not shown) of the one chamber. Thereby, it becomes possible to reinforce the adjacent room of the said one room which installed the earthquake-proof reinforcement structure 1, and the earthquake-proof strength of the whole house improves. And it becomes possible to escape damage by evacuating to the said room reinforced with the earthquake-proof reinforcement structure 1 at the time of the occurrence of an earthquake.

It is a perspective view of the seismic reinforcement structure concerning this invention. It is an assembly perspective view of the fastening part of the steel frame base, steel column, and fastening member of the earthquake-proof reinforcement structure shown in FIG. It is a perspective view of the state which assembled | attached the steel frame base, the steel column, and fastening member of the earthquake-proof reinforcement structure shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seismic reinforcement structure 2 Steel frame foundation 3 Steel column 3a, 3b Side surface 3c Open end 3d, 3e Bolt insertion hole 4 Steel frame beam 5 First fastening member 5a, 5b Fastening portion 5c Flat plate portion 5d, 5e Bolt insertion hole 6 Second fastening member 6a, 6b Fastening portion 6c Flat plate portion 6d, 6e Bolt insertion hole 6f Hole 7 Different muscle 7a Turnbuckle 11 Steel base 11a Upper portion 11b Lower side portion 11c Vertical portion 11d, 11e Bolt insertion hole 12 Steel beam 12a Lower Side part 12b Upper part 12c Vertical part 13,14 Fastener 15 Bolt 16 Nut

Claims (3)

A seismic reinforcement structure that is installed and reinforced in a desired room of an existing house,
Bolt insertion holes are formed at both ends of the horizontal upper part and the central vertical part made of H-shaped steel, and are installed on the foundation formed in the one chamber to constitute a steel frame foundation,
Bolt insertion holes corresponding to the bolt insertion holes in the upper part are formed at the lower ends of the side surfaces that are made of square pipe steel and are arranged perpendicular to the corners of the steel frame foundation and facing the ends of the adjacent steel foundations. Steel columns,
A bolt insertion hole is formed at the upper end of each steel column corresponding to the bolt insertion hole formed on the opposite side surface of the steel column at both ends of the horizontal lower portion and the central vertical portion made of H-shaped steel. A steel beam constituting a steel frame beam,
The steel plate, the steel beam, and the steel column are formed at each fastening part by forming two fastening parts by forming a right isosceles triangle shape with a thick steel plate and bending the two sides sandwiching the right angle part at right angles to one side. A bolt insertion hole is formed corresponding to the bolt insertion hole of the steel plate, one fastening portion is fastened to the upper end portion of the steel base or the lower end portion of the steel beam, and the other fastening portion is the steel frame. A first fastening member fastened to a corresponding side of the column;
The steel plate is formed into a right-angled isosceles triangle shape, the two sides sandwiching the right-angled portion are bent at right angles to one side to form two fastening portions, and the right-angled portion is cut corresponding to the steel column. A bolt insertion hole is formed in each fastening part corresponding to the bolt insertion hole of the steel base and the steel beam, and one side fastening part is fastened to the end of the vertical part of the steel base or steel beam. A second fastening member whose side fastening portion is fastened to a vertical end portion of the steel base or steel beam orthogonal to the steel base or steel beam;
A seismic reinforcement structure comprising a fastening portion of the first and second fastening members, and a bolt and a nut for fastening the steel base, the steel beam, and the steel column.   The seismic reinforcement structure according to claim 1, wherein the second fastening member for fastening the steel bases constituting the steel frame base is fixed to an anchor bolt planted on the foundation. .   The seismic reinforcement structure according to claim 1 or 2, wherein the steel frame beams are fastened with diagonal lines between second fastening members positioned diagonally.

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