JP6644613B2 - Braces - Google Patents

Description

  The present invention relates to a brace formed of a steel pipe or the like and attached to a building frame.

  Conventionally, braces having various structures have been proposed for a brace to be attached to a building frame (for example, see Patent Documents 1 and 2).

  FIG. 4A is a side view showing an example of a state in which a brace is attached to a building frame, FIG. 4B is an enlarged view of the brace, and FIG. It is PP sectional drawing. Reference numeral A in the figure indicates a building body, reference numeral 21 indicates a brace attached to the building body A, reference numeral 23 indicates a steel core (H-shaped steel) on which an axial force acts, Reference numeral 24 indicates a concrete member attached so as to cover the steel core member 23, and reference numeral 22 indicates a steel pipe that covers and reinforces the outer periphery of the concrete member 24. Now, when an earthquake occurs and a compressive force or a tensile force acts on the illustrated brace 21, the force is received by the steel core member 23, and the building is reinforced. Since the concrete member 24 and the steel pipe 22 are attached so as to cover the steel core member 23, even if a compressive force is applied to the steel core member 23, the steel core member 23 or the like is used. Buckling of the member 23 is prevented.

  FIG. 5 is a partial cross-sectional view showing another example of the conventional structure of the brace. Reference numeral 32 in the drawing denotes an outer steel pipe (axial force pipe) for receiving a tensile force or a compressive force, and reference numeral 33 denotes a steel pipe. Denotes an inner steel pipe (stiffening pipe) which is disposed over the entire length of the outer steel pipe 32 and stiffens the outer steel pipe 32, and reference numeral 35 denotes a mounting part for mounting to a building.

JP 2014-31654 A Japanese Patent No. 5034579

  By the way, in the brace 21 illustrated in FIGS. 4A and 4B, a plurality of steel parts 22 and 23 are arranged over the entire length, and in the brace 31 illustrated in FIG. , 33 are arranged over the entire length, but these steel parts are expensive, and the braces 21, 31 are correspondingly expensive.

  An object of the present invention is to provide a brace capable of solving the above-mentioned problem.

A first aspect of the present invention is illustrated in FIGS. 1 and 2 (c), and includes an outer steel pipe (2, 12);
An inner steel material (3, 13) disposed inside the outer steel pipe (2, 12) in a part (dx1) along a longitudinal direction (x) of the outer steel pipe (2, 12);
A section along the longitudinal direction (x) of the outer steel pipe (2, 12) so as to contact the inner steel material (3, 13) and receive a pressing force from the inner steel material (3, 13); (Dx2), in a section (dx2) where the inner steel material (3, 13) is not disposed, a fluid or a cement (hardened body) filled in the outer steel pipe (2, 12). 4,14),
A brace (1, 11) characterized by comprising attachment portions (5, 15) attached to both ends of the outer steel pipe (2, 12) and attached to a building frame (not shown), respectively.

  According to a second aspect of the present invention, the filler (4, 14) is a hardened cement, and is disposed at a position where the inner peripheral surface of the outer steel pipe (2, 12) can come into contact with the outer steel pipe. The outer steel pipe (2, 12) is configured to prevent buckling based on contact with the inner peripheral surface of the (2, 12).

A third aspect of the present invention is, as illustrated in FIG. 3B, a portion of the inside of the outer steel pipe (12) along a longitudinal direction (x) of the outer steel pipe (12). dx1) placing an inner steel material (13);
Attachment portions (15) attached to the building frame are attached to both ends of the outer steel pipe (12), respectively, and the steel pipe openings at both ends of the outer steel pipe (12) are closed to substantially cut the inside of the outer steel pipe (12). A process of forming a closed space;
A section from the fluid filling through hole (16) formed in the outer steel pipe (12) or the mounting portion (15) to the inside of the outer steel pipe (12) and where the inner steel material (13) is not disposed ( dx2) with a fluid (see arrow B);
The fluid filling through hole (16) is closed to prevent the fluid from leaking to the outside of the outer steel pipe (12), and / or the fluid or the fluid is cured by hardening the fluid into a hardened cement body. A step of contacting the hardened cement with the inner steel material (13) to receive a pressing force from the inner steel material (13) (see FIG. 3 (c)). 11) A manufacturing method.

  According to a fourth aspect of the present invention, the fluid filled from the fluid filling through hole (16) fills a gap between an outer peripheral surface of the inner steel material (13) and an inner peripheral surface of the outer steel pipe (12). A step of arranging a sealing member (see reference numeral 17 in FIGS. 3B and 3C) so as not to enter the gap and / or the vicinity of the gap.

According to a fifth aspect of the present invention, in the case where the fluid is in the form of a paste before being hardened into a hardened cement body,
Lubricant is applied to the inner peripheral surface of the outer steel pipe (12), which is in contact with the fluid, through the fluid filling through hole (16), the steel pipe opening or another through hole (FIG. 3 (a)). The step of applying the fluid is performed before filling the inside of the outer steel pipe (12) with the fluid.

  Note that the numbers in parentheses are for convenience showing the corresponding elements in the drawings, and therefore, the description is not limited to the description on the drawings.

  According to the first, third and fourth aspects, the inner steel material is disposed only in a part of the outer steel pipe in a longitudinal direction, and is not disposed over the entire length of the outer steel pipe. Therefore, the cost can be reduced as compared with the case where the inner steel material is arranged over the entire length of the outer steel pipe.

  According to the second aspect described above, buckling of the outer steel pipe is prevented based on the inner peripheral surface of the outer steel pipe coming into contact with the filler.

  According to the fifth aspect described above, it is possible to prevent the cement hardened body from adhering to the inner peripheral surface of the outer steel pipe.

FIG. 1 is a sectional view showing an example of the configuration of the brace according to the present invention. 2A to 2C are cross-sectional views illustrating an example of a method of manufacturing a brace according to the present invention. 3A to 3C are cross-sectional views illustrating another example of the method of manufacturing a brace according to the present invention. FIG. 4A is a side view showing an example of a state in which a brace is attached to a building frame, FIG. 4B is an enlarged view of the brace, and FIG. It is PP sectional drawing. FIG. 5 is a partial sectional view showing another example of the conventional structure of the brace.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

The brace according to the present invention is exemplified by reference numerals 1 and 11 in FIG. 1 and FIG.
The outer steel pipes 2, 12;
-Inner steel materials 3, 13 arranged inside the outer steel pipes 2, 12;
Filling members 4, 14 which are filled (arranged) inside the outer steel pipes 2, 12 so as to come into contact with the inner steel materials 3, 13 and receive a pressing force from the inner steel materials 3, 13;
Mounting parts 5 and 15 that are mounted on a building frame (not shown);
It has.

  In addition, these outer steel pipes 2 and 12 may be cylindrical or square tubular (for example, square tubular, pentagonal or other square tubular).

  The inner steel materials 3 and 13 are arranged in a part section dx1 along the longitudinal direction x of the outer steel pipes 2 and 12. In the example shown in FIG. 1 and FIG. 2C, the inner steel materials 3 and 13 are arranged at one position at one end of the outer steel pipes 2 and 12, but the present invention is not limited to this. For example, it may be arranged at two places at both ends of the outer steel pipes 2 and 12, or may be arranged at one or more places other than the ends. And may be arranged at a plurality of locations including the above. These inner steel materials 3 and 13 may be materials that yield when they receive a compressive force due to an earthquake or the like. The shape of the inner steel materials 3 and 13 may be any shape, even if it is a cylindrical or square tubular steel pipe, or a cross section of H-shaped, I-shaped or cross-shaped steel. good.

  The above-mentioned fillers 4 and 14 are arranged in almost all sections dx2 in a section dx2 along the longitudinal direction x of the outer steel pipes 2 and 12 where the inner steel materials 3 and 13 are not arranged. ing. That is, in the direction along the longitudinal direction x of the outer steel pipes 2, 12, either the inner steel material 3, 13 or the filler 4, 14 is disposed. The fillers 4 and 14 are composed of a fluid (preferably, a fluid such as grout) or a hardened cement. Here, the hardened cement in this specification is a general term for hardened cement paste, cement mortar, and cement concrete. The hardened cement body may include a reinforcing steel or a steel material, and may be a precast member such as a prestressed concrete pile (a so-called PHC pile). Furthermore, the fluid in the present specification is a concept that includes a viscous material such as clay and a paste-like material before being hardened into the hardened cement material. When a hardened cement body is used as the fillers 4 and 14, the fillers 4 and 14 and the inner steel materials 3 and 13 may not be connected to each other but may simply contact each other. When the fillers 4, 14 and the inner steel materials 3, 13 are not connected, the tensile force applied to the braces 1, 11 is received only by the outer steel pipes 2, 12, and When the inner steel materials 3 and 13 are connected to each other, the tensile force applied to the braces 1 and 11 is applied not only to the outer steel pipes 2 and 12 but also to the fillers 4 and 14 and the inner steel materials 3 and 13. , 13.

  Further, the mounting portions 5 and 15 are preferably mounted on both ends of the outer steel pipes 2 and 12, respectively. The mounting portions 5 and 15 may have any shape. The mounting portions 5 and 15 are preferably welded to both ends of the outer steel pipes 2 and 12, respectively. Further, one of the mounting portions 5, 15 and the inner steel materials 3, 13 may be connected by welding or the like, but may not be connected.

  According to the present invention, when an earthquake occurs, the tensile force acting on the braces 1, 11 acts on the outer steel pipes 2, 12 via the mounting portions 5, 15, and the compressive force acting on the braces 1, 11 is Since it acts on the inner steel materials 3 and 13, the fillers 4 and 14, and the outer steel pipes 2 and 12 via the attachment portions 5 and 15, the building is reinforced by the braces 1 and 11. be able to. When the tensile force acting on the braces 1 and 11 is equal to or more than a certain value, the outer steel pipes 2 and 12 yield and absorb the energy of the earthquake. The inner steel members 3, 13 yield and absorb the energy of the earthquake. In this case, the length and the cross-sectional area of the inner steel materials 3 and 13 (specifically, the relative ratio between the cross-sectional area of the inner steel materials 3 and 13 and the cross-sectional area of the outer steel pipes 2 and 12) are set to appropriate values. Good to do. For example, the inner steel materials 3 and 13 may be shortened so as not to buckle when subjected to a compressive force. Steel materials 3 and 13 can be lengthened to some extent. Further, the cross-sectional area of the inner steel materials 3 and 13 is made larger than the cross-sectional area of the outer steel pipes 2 and 12, so that the axial rigidity of the inner steel materials 3 and 13 is greater than the axial rigidity of the outer steel pipes 2 and 12. It is better to be higher.

  Since the inner steel materials 3 and 13 are obtained by machining steel or the like, they are more expensive than the fillers 4 and 14 made of a fluid or a hardened cement. However, in the present invention, the inner steel materials 3 and 13 are arranged only in a part of the section dx1 along the longitudinal direction x of the outer steel pipes 2 and 12 and extend over the entire length of the outer steel pipes 2 and 12. Since they are not arranged, the cost can be reduced as compared with the case where the inner steel materials 3 and 13 are arranged over the entire length of the outer steel pipes 2 and 12.

  In the case where a hardened cement (hardened cement rather than a paste) is disposed as the fillers 4 and 14, the outer peripheral surface of the hardened cement and the inner peripheral surface of the outer steel pipes 2 and 12 are provided. May be provided, or some gap may be provided between them. However, when a predetermined or more compressive force acts on the outer steel pipes 2, 12, The fillers 4, 14 are arranged at positions where the peripheral surfaces can come into contact with each other, and the outer steel pipes 2, 12 are formed based on the contact of the fillers 4, 14 with the inner peripheral surfaces of the outer steel pipes 2, 12. It is good to prevent buckling.

On the other hand, the method of manufacturing a brace according to the present invention includes:
A step of arranging the above-described inner steel material 13 inside the outer steel pipe 12 as illustrated in FIG.
Attaching the above-described attachment portions 15 to the both ends of the outer steel pipe 12 so as to close the steel pipe openings at both ends of the outer steel pipe 12 so as to make the inside of the outer steel pipe 12 a substantially sealed space;
A step of filling a fluid from the fluid filling through hole 16 formed in the outer steel pipe 12 into a section dx2 inside the outer steel pipe 12 where the inner steel material 13 is not disposed (arrow in FIG. 3B) B) and
It has. In this case, the inner steel material 13 is preferably disposed inside the outer steel pipe 12 and in a part of the outer steel pipe 12 in a section dx1 along the longitudinal direction x. Further, the mounting portion 15 may have a structure to be mounted on a building frame (not shown) of the building. Further, when the fluid filled as described above is used as the filler 14 as a fluid, the fluid filling through hole 16 is closed so that the fluid does not leak out of the outer steel pipe 12. Good. In the case where the filled fluid is in the form of a paste before being hardened into a hardened cement body and the fluid is hardened into a hardened cement body and used as the filling body 14, the fluid filling through hole may be used. 16 may or may not be closed. Then, it is preferable that the filler 14 (that is, the fluid or the cement hardened body) comes into contact with the inner steel 13 so that the pressing 14 receives the pressing force from the inner steel 13. In addition, the through hole 16 for fluid filling illustrated in FIGS. 3B and 3C is formed in the outer steel pipe 12, but is not limited to this, and may be formed in the mounting portion 15. good.

  According to the present invention, the same effects as described above can be obtained. That is, since the inner steel material 13 is disposed only in a part of the section dx1 along the longitudinal direction x of the outer steel pipe 12 and is not disposed over the entire length of the outer steel pipe 12, the inner steel material 13 is The cost can be reduced as compared with the case where the outer steel pipe 12 is arranged over the entire length.

  Meanwhile, as illustrated in FIGS. 3B and 3C, a disk-shaped sealing member 17 is disposed near a gap between the outer peripheral surface of the inner steel material 13 and the inner peripheral surface of the outer steel pipe 12. Then, the fluid filled from the fluid filling through hole 16 is preferably prevented from entering the gap. Further, a cylindrical sealing member may be arranged in a gap between the outer peripheral surface of the inner steel material 13 and the inner peripheral surface of the outer steel pipe 12. The sealing member may be made of any material that can prevent the fluid from entering the gap, and may be, for example, styrene foam.

  On the other hand, when the paste-like material before hardening into a hardened cement body is filled as the fluid from the fluid filling through hole 16, the fluid filling through hole 16, the steel pipe opening or another through hole ( A step of applying a lubricant (see reference numeral 18 in FIG. 3A) to the inner peripheral surface of the outer steel pipe 12 and the surface that comes into contact with the fluid may be performed via a not-shown). This step is preferably performed before filling the inside of the outer steel pipe 12 with the fluid. In such a case, the hardened cement body can be prevented from adhering to the inner peripheral surface of the outer steel pipe 12.

DESCRIPTION OF SYMBOLS 1 Brace 2 Outer steel pipe 3 Inner steel material 4 Filler 5 Mounting part 11 Brace 12 Outer steel pipe 13 Inner steel material 14 Filler 15 Mounting part 16 Fluid filling through hole 17 Sealing member 18 Lubricant dx1 Section in which inner steel material is arranged dx2 Section where the filler is arranged x longitudinal direction of the outer steel pipe

Claims (5)

An outer steel pipe,
An inner steel material arranged inside the outer steel pipe in a part of a section along the longitudinal direction of the outer steel pipe,
In a section along the longitudinal direction of the outer steel pipe and in a section where the inner steel material is not arranged, the outer steel pipe is contacted with the inner steel material to receive a pressing force from the inner steel material. Filler made of fluid or cement hardened body filled inside,
Attaching parts attached to both ends of the outer steel pipe and attached to the building skeleton, respectively ,
A brace, wherein a compressive force acting on the brace when an earthquake occurs acts on the inner steel material, the filler and the outer steel pipe via the mounting portion . The filler is a hardened cement body and is disposed at a position where the inner peripheral surface of the outer steel pipe can come into contact with the outer steel pipe to prevent the outer steel pipe from buckling due to contact with the inner peripheral surface of the outer steel pipe. Configured to
The brace according to claim 1, wherein: In manufacturing the brace according to claim 1,
Arranging the inner steel material in a part of the outer steel pipe inside and along a longitudinal direction of the outer steel pipe;
Attaching a mounting portion attached to the building body of the building to both ends of the outer steel pipe, closing the steel pipe openings at both ends of the outer steel pipe to make the inside of the outer steel pipe a substantially closed space,
A step of filling a fluid from the fluid filling through hole formed in the outer steel pipe or the mounting portion to a section inside the outer steel pipe and in which the inner steel material is not arranged,
The fluid or the cement hardened body is closed by closing the fluid filling through hole to prevent the fluid from leaking out of the outer steel pipe and / or hardening the fluid into a hardened cement body. Contacting the steel material to receive a pressing force from the inner steel material;
A method of manufacturing a brace, comprising: A sealing member is provided in the gap and / or in the vicinity of the gap so that the fluid filled from the fluid filling through hole does not enter the gap between the outer peripheral surface of the inner steel material and the inner peripheral surface of the outer steel pipe. Placing the,
The method for manufacturing a brace according to claim 3, further comprising: When the fluid is in the form of a paste before hardening into a hardened cement body,
Applying a lubricant to the inner peripheral surface of the outer steel pipe through the fluid filling through-hole, the steel pipe opening or another through-hole, the surface being in contact with the fluid; Before filling inside the
The method for manufacturing a brace according to claim 3 or 4, wherein:

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