JP2007146579A - Existing wooden building reinforcing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an existing wooden building reinforcing structure capable of being easily inserted and mounted in a narrow gap between an external wall and an internal wall, applicable to slightly deformed columns and beams, and improving earthquake resistance by reinforcing a vertical structural plane body by truss rigidity. <P>SOLUTION: The object of reinforcement is the vertical structural plane boy 1 of the existing wooden building. According to the reinforcing structure, one end of a horizontal link member 2 and an upper end of a vertical link member 3 are connected together by an in-plane rotary joint 50, one end of a diagonal link member 4 is connected to the vertical link member by an in-plane rotary joint 41, and the other end of the diagonal link member is connected to the horizontal link member by the an in-plane rotary joint 42. Then one end of a joint link member 5 is connected to the diagonal link member by an in-plane rotary joint 40, and the other end of the joint link member is connected to the horizontal link member or the vertical link member by the in-plane rotary joint 50. Further the vertical link member and/or the joint link member is formed of a flexible material, and triangular assembly frames A set up by the link members are arranged along upper internal corners of the vertical structural plane body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a reinforcing structure in which a vertical structure is reinforced by post-installation in order to improve seismic reinforcement of an existing wooden building.

  Conventionally, in an existing wooden building, a technique is known in which the vertical structure is reinforced by bracing material in post-construction (see Patent Document 1).

  This conventional reinforcement technique is intended to reinforce a vertical structural body of an existing wooden building that is framed by upper and lower cross members and left and right pillars passed between the upper and lower cross members.

  The reinforcing structure includes an upper working hole for connecting the upper end and the lower end of the bracing material to the corners of the vertical structure, and forming a mounting hole for inserting the bracing material into the gap between the outer wall and the inner wall. The lower working hole is formed on the outer wall.

  Then, the bracing material is inserted into the gap between the outer wall and the inner wall from the outside of the existing wooden building through the built-in hole, and then the upper and lower ends of the bracing material are entered from the outside through the upper work hole and the lower work hole. It was supposed to be connected to.

  Although this reinforcement technology can eliminate large-scale work such as removing the entire outer wall and incorporating bracing material, it is necessary to form an assembling hole, upper work hole, and lower work hole on the outer wall. There was a problem that it took.

Conventionally, there is known a brace-shaped braking unit in which two braces and energy absorbing means are coupled by pin joining inside a frame formed in a rectangular shape with a vertical frame and a horizontal frame (see Patent Document 2). ).
However, in this brace-shaped braking unit, since the vertical frame and the horizontal frame are not linked, it is difficult to insert this into the narrow gap between the outer wall and the inner wall of the existing wooden building in the subsequent work, This conventional structure is intended to absorb energy, and is different from that reinforced with truss rigidity.

Conventionally, as a structure reinforcement structure for buildings, the opening of the RC structure is the object of reinforcement, and a steel frame member is attached in the opening, and one end of the elastic-plastic shear panel is rigidly connected to this steel frame member. An earthquake-proof reinforcement structure is known in which a brace is connected to the other end by pin joining (see Patent Document 3).
However, it is difficult to insert this seismic reinforcement structure into the narrow gap between the outer wall and the inner wall of an existing wooden building by post-work, and this conventional structure has toughness that denies the strength resistance brace. It is a structure with a resistance brace, and it is different from one that is reinforced with truss rigidity.

Furthermore, as a reinforcing structure that the present inventor has already proposed, there is a reinforcing structure in which a triangular assembled frame is attached along the upper corner of the vertical structure (Japanese Patent Application No. 2005-102372).
However, in this prior art, since it is configured on the premise that pushing and pulling (compression and tension of the member) occur in the member force of all the link materials used, the member based on the long compression strength is necessarily strong. In addition, when the link material has a divided structure, the joint portion has to be strong, and there is a problem that the construction is difficult in a narrow place and the cost is increased.
JP 2003-239543 A JP 2002-106203 A Japanese Patent Publication No. 7-96841

  The present invention is intended to reinforce a vertical structure of an existing wooden building, and by using a triangular assembled frame formed as a substitute for bracing, a hole is made in a wall or a wall is destroyed. Provide a reinforcement structure for an existing wooden building that can be easily inserted and mounted in a narrow gap (inside the wall) between the outer wall and the inner wall, and the vertical structure can be reinforced with truss rigidity to improve seismic strength. It is an issue.

In order to solve the above problems, the reinforcing structure of the existing wooden building of the present invention (Claim 1) is:
A vertical frame of an existing wooden building framed by upper and lower cross members and left and right pillars passed between the upper and lower cross members is to be reinforced, a horizontal link member, a vertical link member, and a connection link member And an oblique link member in which the lower end of the upper oblique member and the upper end of the lower oblique member are connected by an in-plane rotation node,
One end of the horizontal link member and the upper end of the vertical link member are connected by an in-plane rotary node,
One end of the diagonal link member is connected to the vertical link member by an in-plane rotary node, and the other end of the diagonal link member is connected to the horizontal link member by an in-plane rotary node,
One end of the connection link member is connected to the oblique link member by an in-plane rotary node, the other end of the connection link member is connected to a horizontal link member or a vertical link member by an in-plane rotary node, and the vertical link The material and / or the connecting link material is formed of a flexible material,
A triangular assembly frame formed by these link members was attached along the upper corner of the vertical structure.

Moreover, the reinforcement structure of the existing wooden building of the present invention (Claim 2) is:
The vertical plane of the existing wooden building framed by the upper and lower cross members and the left and right pillars passed between the upper and lower cross members is to be reinforced.
It consists of a horizontal link material, a vertical link material, and an oblique link material, and both ends of each link material are connected to each other by an in-plane rotary node, and the vertical link material is made of a flexible material,
A triangular assembly frame formed by these link members was attached along the upper corner of the vertical structure.

  The triangular assembled frame used in the present invention includes a horizontal link material, a vertical link material, a connection link material, and a diagonal link material in which the lower end of the upper diagonal material and the upper end of the lower diagonal material are connected by an in-plane rotary node. Are connected by an in-plane rotary node (Claim 1), or a horizontal link material, a vertical link material, and an oblique link material are connected by an in-plane rotary node (Claim 2). It is.

Therefore, since each link material can be assembled while being connected, it is easy to bring it into the ceiling space in an existing wooden building as a construction site. Because it can be bent and folded, the triangular assembly frame can be easily formed into a narrow gap between the outer wall and the inner wall by working from the ceiling space without making a hole in the wall or destroying the wall. Can be inserted and attached.
In addition, the triangular assembled frame can be attached by using the horizontal link material and the vertical link material as they are, using the existing cross members (beam materials) and columns as they are.
Moreover, since the diagonal link member attached diagonally between the cross member (beam member) and the column stretches, it can function as a shear deformation suppressing member, and the vertical structural body can be reinforced to improve the earthquake resistance.

In order to improve the reinforcing strength, the oblique link material may be formed long, but in this case, the vertical link material needs to be formed long.
If the vertical link material is formed long in this way, the degree of freedom in handling decreases. Then, if the vertical link material is connected so that a plurality of short link materials can be folded or connected, it becomes easy to handle.
In particular, considering that the force generated in the vertical link material is only a tensile force, the ease of handling can be remarkably improved by using this as a flexible material.
Similarly, for horizontal link members and diagonal link members, a plurality of short link members can be connected in a foldable or addable manner, but these members can be connected by a joint capable of transmitting a bending moment. Do.

In addition, when the diagonal link material is long, the diagonal link material is required to have a strength against buckling because a compressive force is applied to the diagonal link material, and it is necessary to make it a large member, which is disadvantageous in terms of handling and cost. Therefore, the diagonal link material is divided into an upper diagonal link material and a lower diagonal link material, and these are connected by an in-plane rotary node, and the vicinity of this division point is supported by a connecting link material, thereby buckling the diagonal link material. The proof stress can be improved (claim 1).
Furthermore, if the force generated in the connecting link material can be made only a tensile force by selecting the connection point between the upper oblique link material and the lower oblique link material, this is a flexible material. The ease of handling is further improved.

  Further, if the strength of the diagonal link material is sufficient, the connection link material is unnecessary, and the above function can be exhibited by using only the vertical link material as a flexible material.

  Hereinafter, for ease of explanation, the description will be made with the configuration of claim 1 provided with a connection link material (the configuration of claim 2 is excluded except for the description regarding the connection link material).

  It is better to attach the connecting link in a form that supports the diagonal link material in tension, but this is because the connection between the upper diagonal link material and the lower diagonal link material is a length relationship that becomes downwardly "shaped". This can be achieved by connecting a connecting link in the vicinity (of course, the same point may be used).

In addition, because the size of the triangular assembled frame attached to the vertical structure is slightly different due to the distortion of the house over time, the in-plane rotating joint formed between the upper diagonal member and the lower diagonal member of the diagonal link member The refraction angle changes.
Therefore, if the connecting link material and / or the upper oblique member is formed so that the length can be adjusted, it is possible to cope with a change in the refraction angle of the oblique link member, and the oblique link member can be securely attached in a stretched state.
Furthermore, when there is a horizontal rail or the like in the wall, and this becomes an obstacle and the triangular aggregate frame with the standard size cannot be put in the wall, it is necessary to make the triangular aggregate frame with a shortened vertical link material. The length of the vertical link material and connection link material, which are tensile members, can be easily adjusted in stages (digitally) by providing a plurality of holes in the short link material constituting them and selecting the connecting holes. However, it can be changed and the dimensions of the triangular assembly frame can be changed using the same member.

FIG. 1 is a front view showing a first embodiment of a reinforcing structure of an existing wooden building corresponding to claim 1 of the present invention.
This reinforcing structure is composed of a triangular aggregate frame A on the vertical structural body 1 of an existing wooden building framed by a beam 10 (upper cross member), a base 11 (lower cross member), and left and right columns 12 and 12. A is attached. In the figure, reference numeral 13 denotes a ceiling surface.
In the embodiment, a spacer 15 is attached to the center of the vertical structure 1, and a pair of left and right triangular assembled frames A and A are attached so as to be symmetric about the spacer 15.

The triangular assembly frame A is formed of a horizontal link member 2, a vertical link member 3, an oblique link member 4, and a connection link member 5. The oblique link member 4 has a configuration in which the lower end of the upper oblique member 4a and the upper end of the lower oblique member 4b are connected by an in-plane rotating node 40.
In addition, it is preferable to use a pipe member for each link member (horizontal link member 2, oblique link member 4) other than the vertical link member 3 and the connection link member 5 in consideration of rigidity and weight reduction. For the vertical link member 3 and the connecting link member 5, an iron-based material made of a flat steel bar may be inexpensive, but is not limited thereto.

One end of the horizontal link member 2 is attached to the upper portion of the column 12 above the ceiling surface 13, and the other end portion is attached to the beam 10 by a support 17 near the intermediate column 15.
Further, the length of the horizontal link member 2 can be adjusted by the length adjusting screw 21 and can be attached to the existing house corresponding to various dimensions of the distance between the pillars.

  The vertical link member 3 is connected at its upper end by an in-plane rotary node 50 made of a bracket and a pin protruding from the horizontal link member 2, and at the lower end by an in-plane rotary node 42 at the lower end of the lower diagonal member 4b. Is formed.

  The oblique link member 4 is a member in which the lower end of the upper oblique member 4a and the upper end of the lower oblique member 4b are connected by an in-plane rotating node 40, and the upper end of the upper oblique member 4a projects to the end of the horizontal link member 2. The lower diagonal member 4b is connected by an in-plane rotary node 42 using a bracket and a pin protruding from the end of the vertical link member 3.

One end of the connecting link member 5 is connected to an in-plane rotary node 40 formed in the middle of the oblique link member 4, and the other end is connected to an upper in-plane rotary node 50 using a bracket and a pin on the horizontal link member 2. Has been.
The connection position of the connection link material 5 to the horizontal link material 2 is preferably shared with the connection point 50 between the vertical link material 3 and the horizontal link material 2, but is not limited to this, and the vicinity thereof It may be separately connected to the horizontal link member 2 at.
Similarly, the connection link member 5 may be connected to the oblique link member 4 by separately providing a connection point in the vicinity of the in-plane rotary node 40.

  As described above, the triangular assembled frame A of the first embodiment includes the triangular frame formed by the horizontal link member 2, the upper oblique member 4a, and the connecting link member 5, the vertical link member 3, and the lower oblique member 4b. It is formed in a truss structure having a triangular frame formed by the connecting link material 5 and the vertical structure 1 formed by columns-beams can be reinforced by the truss rigidity.

  Further, as in the first embodiment, when the triangular assembled frames A and A are provided in a pair on the left and right sides, this can be applied to the force from the left direction of the drawing and the force from the right direction of the drawing. Reinforce and improve seismic strength.

Next, FIG. 2 is an explanatory view showing the relationship between the external force generated in the oblique link member of the first embodiment of the present invention and the displacement.
A model in which the horizontal link member 2 is supported by points a and c and an external force F is applied to the lower end b point of the vertical link member 3 is equivalent to the present invention in terms of structural mechanics. The movement δ of the connecting point d between the upper oblique link member 4a and the lower oblique link member 4b represented by the line segment db is determined from the point a as shown in the figure when the point d is outside the triangle abc. Move away. That is, when the length of the upper oblique link member 4a and the lower oblique link member 4b and the connection point arrangement are arranged as described above, a tensile force is always generated in the connection link 5 that serves to connect the points ad. The material 5 can be configured as a member that performs only tensile work.

FIG. 3 is a front view showing a second embodiment of the reinforcing structure of an existing wooden building corresponding to claim 2 of the present invention.
In this reinforcing structure, a triangular assembled frame A is formed by a horizontal link member 2, a vertical link member 3, and an oblique link member 4, and the link ends are connected by in-plane rotary nodes 50, 41, 42. It has become configured.
That is, the diagonal link material 4 has sufficient strength, and the connection link material 5 used in the first embodiment is not necessary.
In the second embodiment, the tension member is only the vertical link member 3.

Further, in this example, the length adjusting screws 21 of the left and right horizontal link members 2 are provided on the side pillar 15 side, a through hole is formed in the center pillar 15, and the left and right adjusting screws are used as one adjusting screw. Along with the reduction in the number of parts, for example, the compressive force generated in the left horizontal link 2 is also transmitted to the right horizontal link 2, and the axial force applied to the horizontal link members 2, 2 is finally shared by the left and right columns 12, 12. It is preferable because it can be supported. Of course, this configuration can also be applied to the first embodiment.
Other configurations are the same as those of the first embodiment.

Next, FIG. 4 is a figure which shows the Example at the time of forming the vertical link material 3 and the connection link material 5 which are members which perform only the tension work of this invention in a flexible (folding) tension link.
By inserting the inner link 31 between the two outer links 32a and 32a and connecting the rotary nodes with the pins 32b, the assembly link can be easily configured.
In addition, when a plurality of rotary node connection positions P1 and P2 (connection holes) are formed in the inner link 31 and the inner rotary node connection positions are connected by P2, a flexible link with a reduced length from P1 to P2 is obtained. The link total length can be changed by simply changing the pin position with the same member.
In FIG. 4, only the connection portion between the outer link 32a and the inner link 31 is shown. However, if one set is connected to a plurality of sets, a flexible link having a length required for a link combination of short materials can be obtained. It can be folded and inserted into the wall.

It should be noted that the number of the inner links 31 is not limited to one, but can be freely combined, such as two inner links having a gap between them, but the force transmission of each link is symmetrical. Such a configuration is preferable because the link is not bent.
Further, the flexible link is not limited to the connection structure of the short links of the plate-like material used in this embodiment, and a wire or a chain may be used alone or in combination.

Next, FIG. 5 is a figure which shows the Example at the time of making the diagonal link material 4 which is a member which receives only the compression external force of this invention into a divided structure.
In this case, the oblique link member 4 is fitted to form a joining-type assembly-type compression link configuration.
In order to insert a member in a narrow space, it is necessary to insert the diagonal link material 4 (compression link) into the wall with a short material as a divided structure and to assemble it into a linear structure that can withstand compression in the wall.
Therefore, an insertion-type restraint tube 43b is provided at the lower end of the short compression link member 43a constituting the oblique link member 4, and the upper end of the next short compression link member 43a to be connected is fitted into the restraint tube 43b. The diagonal link material 4 (compression link) of length is formed.

In addition, since it is necessary to perform the above fitting operation | work in the wall which an operator cannot reach, the guide wire stopper 43c is provided in the short compression link material 43a of the lowest end, and the guide wire 43d fixed to it is short compression This is assisted through the centering of the short compression link members 43a, 43a to be connected through the link member 43a.
Furthermore, if necessary, as shown in FIG. 6, it is also effective to provide an inner guide 43e that restricts the movement of the short compression link member 43a in a part of the guide wire 43d for more reliable alignment. .
Of course, the insertion assisting means having another guide configuration is also effective and is not limited to the present embodiment.

The connecting link member 5 and / or the upper diagonal member 4a is preferably formed so that its length can be adjusted after assembly, and an example in which a length adjusting screw flange 18 is provided on the upper diagonal member 4a is shown in FIG. The length adjustment structure may be a general structure in which the distance between the flanges is adjusted with bolts and nuts, and thus description thereof is omitted.
With this configuration, even if there is a dimensional change in the construction of pillars and beams of existing houses due to secular change, the lower end of the vertical link 3 can be moved to the left and right of the drawing by adjusting the length of the upper diagonal member 4a. It is also possible to attach the triangular assembly frame A to the corners of the columns and beams where a slight deviation has occurred.

  Since each of the in-plane rotary nodes is coupled by a bolt shaft (pin), a deformation restraining action is generated in the out-of-plane direction, and the out-of-plane pushing load applied to each in-plane rotary node can be reduced. .

  As described above, when the triangular assembled frame is formed of a short material connection structure, it can be inserted and assembled into the wall from a narrow gap in the ceiling, so it can be easily applied to existing wooden buildings, It can be applied to a column beam that is slightly deformed without making a hole in it or destroying a wall. It is generally said to reinforce the upper part of the vertical structure 1 made of this column beam. It can exhibit the same effect as the shear strength of a hanging wall, can be installed by selecting a place that takes into account the balance of the entire house, and greatly improves the earthquake resistance of existing wooden buildings.

In the reinforcing structure of the present invention, as shown in FIG. 7, in addition to the reinforcement (not shown) by the triangular assembled frame A, the space between the beam 10 and the column 12 and the space between the column 12, the base 11 and the foundation 16 are provided. It is preferable to reinforce with a reinforcing hardware because a further reinforcing effect can be obtained.
In this example, the strip reinforcement metal 6a and the diagonal reinforcement metal 6b are passed between the beam 10 and the pillar 12, and the I-shaped foundation reinforcement 6c and the L-shaped foundation reinforcement 6d are passed between the pillar 12, the base and the foundation 16. It has a structure.

It is a front view which shows 1st Example of the reinforcement structure of the existing wooden building corresponding to Claim 1 of this invention. It is explanatory drawing which shows the relationship between the external force which generate | occur | produces in a diagonal link material, and a displacement. It is a front view which shows 2nd Example of the reinforcement structure of the existing wooden building corresponding to Claim 2 of this invention. It is a figure which shows the Example at the time of forming the vertical link material and the connection link material which are members which perform only the tension work of this invention in a flexible (folding) tension link. It is a figure which shows the Example at the time of making the diagonal link material which is a member which receives only the compression external force of this invention into a division structure. It is a figure which shows the example of the inner guide used in order to make fitting and joining of the short compression link materials which comprise a diagonal link material easy. It is a figure which shows the example of the reinforcement structure using a reinforcement metal fitting.

Explanation of symbols

A Triangular Glue 1 Vertical Structure 10 Beam 11 Base 12 Column 13 Ceiling Surface 15 Space Column 16 Foundation 17 Support 18 Length Adjustment Screw Flange 2 Horizontal Link Material 21 Length Adjustment Screw 3 Vertical Link Material 31 Inner Link 32a Outer Link 32b Pin P1 Rotary node connection position P2 Rotary node connection position 4 Diagonal link material 4a Upper diagonal material 4b Lower diagonal material 40 In-plane rotary node 41 In-plane rotary node 42 In-plane rotary node 43a Short compression link material 43b Restraint tube 43c Guide Wire stopper 43d Guide wire 43e Inner guide 5 Connection link material 50 In-plane rotary node 6a Strip reinforcement metal 6b Diagonal reinforcement metal 6c I-shaped foundation reinforcement 6d L-shaped foundation reinforcement

Claims (2)

A vertical frame of an existing wooden building framed by upper and lower cross members and left and right pillars passed between the upper and lower cross members is to be reinforced, a horizontal link member, a vertical link member, and a connection link member And an oblique link member in which the lower end of the upper oblique member and the upper end of the lower oblique member are connected by an in-plane rotation node,
One end of the horizontal link member and the upper end of the vertical link member are connected by an in-plane rotary node,
One end of the diagonal link member is connected to the vertical link member by an in-plane rotary node, and the other end of the diagonal link member is connected to the horizontal link member by an in-plane rotary node,
One end of the connection link member is connected to the oblique link member by an in-plane rotary node, the other end of the connection link member is connected to a horizontal link member or a vertical link member by an in-plane rotary node, and the vertical link The material and / or the connecting link material is formed of a flexible material,
A reinforcing structure for an existing wooden building, characterized in that a triangular assembled frame formed by these link members is attached along the upper corner of the vertical structure. The vertical plane of the existing wooden building framed by the upper and lower cross members and the left and right pillars passed between the upper and lower cross members is to be reinforced.
It consists of a horizontal link material, a vertical link material, and an oblique link material, and both ends of each link material are connected to each other by an in-plane rotary node, and the vertical link material is made of a flexible material,
A reinforcing structure for an existing wooden building, characterized in that a triangular assembled frame formed by these link members is attached along the upper corner of the vertical structure.

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