JP2014148783A - Seismic resistant frame structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seismic resistant frame structure that enables a seismic resistance of a frame to be easily and beautifully improved by using a brace made of a lightweight and easy-to-work woody material and furthermore is hardly damaged after construction.SOLUTION: There is provided the seismic resistance frame structure in which a brace 4 made of a woody material is provided in a plane of structure of a frame 3. Holders 6 which hold ends 4A of the brace 4 while movement of the ends 4A of the brace 4 in the axial direction of the brace 4 so as to separate from the holders is permitted and the movement of the ends 4A of the brace 4 so as to come close to the holders is restricted, is attached to the frame 3. The brace 4 is attached in the plane of structure of the frame 3 while at least one end of the brace 4 is held with the holder 6.

Description

  The present invention relates to a seismic frame structure, and more particularly to a seismic frame structure in which braces made of a wood-based material are provided in the frame surface of the frame.

  This type of seismic frame structure is a beautiful and simple way to make a new or existing frame earthquake resistant (seismic reinforcement) using a light and easy-to-process wood-based material.

  Conventionally, as shown in Patent Document 1, a wooden (an example made of a wood-based material) is provided with a rectangular space (a space in a frame of a frame) surrounded by reinforced concrete columns and beams. Some wooden walls are fitted and fixed to prevent the deformation of the frame during an earthquake by providing rigidity with the wooden walls.

  This wooden wall body rigidly joins a wooden frame member made of wooden square material along the inner surface of the rectangular space with steel material, and bonds each of the ends of the wooden brace to the steel material at two locations of the wooden frame member. It is configured to be rigidly joined with the agent.

  In other words, the wooden brace in the wooden wall body bears both tensile stress and compressive stress against the deformation of the frame during an earthquake or the like by rigid connection with the wooden frame member rigidly bonded to the frame. Suppresses deformation.

JP 2000-220303 A (FIGS. 3 and 5)

  However, in the conventional seismic frame structure, when the wooden brace bears the tensile force, a large tensile force acts on the joint (rigid joint) between the frame and the end of the brace itself. The joint may be damaged by force, and the problem of loss of the bracing reinforcement function may occur.

  Moreover, in order to prevent damage to the joint portion between the frame and the end of the brace, it is conceivable to make the joint portion a robust structure that can sufficiently withstand a large tensile stress. Other problems such as increased cost and reduced workability occur.

  The present invention has been made in view of the above-described actual situation, and its main problem is to make the frame earthquake-proof beautifully and simply using a brace made of a wooden material that is lightweight and easy to process. The point is to provide a seismic frame structure that can be easily damaged after construction.

The first characteristic configuration of the present invention is a seismic frame structure in which braces made of a wood-based material are provided in the frame surface of the frame,
A holder that holds the end of the brace in a state that allows the movement of the end of the brace in the axial direction of the brace and restricts the close movement of the end of the brace is attached to the frame,
The brace is attached to the frame of the frame with at least one end held by the holder.

  According to the above configuration, with respect to the deformation (swing motion) of the frame on the compression side with respect to the brace made of a wood-based material (hereinafter sometimes abbreviated as a wood-based brace), the brace end of the brace is moved by the holder. Since the compressive force is transmitted to the wooden brace in a state in which the proximity movement is restricted, it is possible to exert a resistance to the deformation of the frame in a state where the compressive force is borne by the wooden brace when an earthquake occurs.

  Nevertheless, with regard to the deformation of the frame on the tension side with respect to the wooden brace, the holder that follows the deformation of the frame and the wooden system that does not follow the deformation of the frame by allowing the brace end to move apart by the holder. Since the end portion of the brace moves relatively apart, it is possible to prevent a tensile force from acting on the joint portion between the frame and the end portion of the brace.

  Therefore, it is possible to beautifully and easily make the frame earthquake-resistant in a state in which the compression force is applied to the lightweight and easy-to-process wooden brace, and at the time of the earthquake, tensile force is applied to the joint between the frame and the end of the brace. It is possible to suppress the occurrence of inconvenience that the joint is damaged due to the action of.

According to a second characteristic configuration of the present invention, the holder includes a holding cylinder portion that holds an end portion of the brace in an interior state,
On the outer peripheral side of the holding cylinder portion, there is provided an insertion port that can be opened and closed for inserting the end portion of the brace into the inside.

  That is, according to this configuration, by inserting the end portion of the wooden brace into the holding cylinder portion with the insertion port on the outer peripheral side of the holding cylinder portion of the holder open, and then closing the insertion port The end portion of the wooden brace can be held by the holding cylinder portion.

  Therefore, the wood system from the state in which the holder is attached to the frame by attaching the holder to the frame so that the insertion port of the holding cylinder part faces the front side or the back side perpendicular to the frame surface of the frame. Since the brace can be attached, the installation work of the wooden brace can be easily performed.

  In addition, since it is possible to remove the wooden brace with the retainer remaining on the frame after the installation of the wooden brace, maintenance work such as repair and replacement of the wooden brace can be easily performed.

  A third characteristic configuration of the present invention is that a cushioning material is interposed between opposing surfaces of the holding tool and the end of the brace in the axial direction of the brace.

  In other words, when deformation of the frame on the compression side occurs with respect to the wooden brace during an earthquake, the compression force is transmitted to the wooden brace via the holder by restricting the close movement of the brace end by the holder. However, in the early stage of deformation of the frame, the tensile force of the wooden brace acts on the frame holder attachment part at first, which causes damage to the frame holder attachment part (or the end of the brace). There is a fear.

  On the other hand, according to the above configuration, since the buffer material is interposed between the opposing surfaces of the holder and the end portion of the brace in the axial direction of the wooden brace, It is possible to prevent damage to the holding attachment part (or the end of the brace) of the frame due to the initial dynamic force of the wooden brace in the initial deformation of the frame.

  According to a fourth characteristic configuration of the present invention, the brace is constituted by a divided brace member that is divided so as to be assembled at predetermined weights.

  According to the above configuration, the brace can be transported easily because it can be transported to the construction site in units of a divided brace member having a predetermined weight (for example, a weight that can be transported by a work vehicle alone).

According to a fifth characteristic configuration of the present invention, the brace is formed such that the wood fiber is in a state along the axial direction of the brace, and the brace end surface is perpendicular or substantially perpendicular to the axial direction of the brace. Formed
The holder is formed such that a surface facing the brace end surface is parallel or substantially parallel to the brace end surface.

  According to the above configuration, the axial force acting on the brace end surface from the holder acts along the wood fiber of the brace, and the shaft strength provided by the wood brace can be fully exhibited. The seismic performance of the entire frame can be improved.

Front view of seismic frame structure Longitudinal section of the main part of the seismic frame structure Sectional view taken along line III-III in FIG. Sectional view along line IV-IV in FIG. (A) Exploded perspective view of main part of brace, (b) Perspective view of main part of brace Exploded view of seismic frame structure Enlarged exploded view of seismic frame structure (A) Schematic diagram showing deformation (compression side) of seismic erection structure during earthquake, (b) Schematic diagram showing deformation (tensile side) of seismic erection structure during earthquake Front view of seismic frame structure of another embodiment Front view of seismic frame structure of another embodiment Front view of seismic frame structure of another embodiment Cross-sectional view of braces in seismic frame structure according to another embodiment

  FIG. 1 shows an earthquake-resistant frame structure in which a brace 4 made of a wooden material is provided in a frame 3 made of a reinforced concrete column 1 and a beam 2, and this earthquake-resistant frame structure is formed on the inner surface of the frame 3. A metal holder 6 is attached with adhesive J to two joint portions 5 that are dispersed in the diagonal direction among the joint portions 5 that are the connecting portions of the columns 1 and the beams 2. Each of the end portions 4A of the brace 4 is held by each. The frame 3 is not limited to a reinforced concrete structure, and may be a steel reinforced concrete structure, a steel frame structure, or the like.

  2, 3, 6, and 7, the holder 6 includes an attachment surface 7 a for the upper end of the column 1 on the inner surface of the joint portion 5 and an attachment surface 7 b for the end of the beam. An attachment plate portion 7 (an example of an attachment portion) having an L shape in side view provided on the outer surface and a holding cylinder portion 8 (an example of a holding portion) that holds the end portion 4A of the brace 4 in an interior state are integrally provided. It becomes.

  Then, the attachment surfaces 7 a and 7 b of the attachment plate portion 7 are adhesively bonded to the inner surface of the joint portion 5 with an epoxy resin adhesive J, and the end portion of the brace 4 is provided inside the holding cylinder portion 8. 4A is held in a movable state within a certain range in the cylinder length direction corresponding to the axial direction of the brace 4.

  That is, the inner peripheral surface of the holding cylinder portion 8 (inner side surfaces of side plate portions 8a to 8d described later) constitutes a movement guide surface that moves and guides the end portion 4A of the brace 4 along the axial direction of the brace 4. .

  Reference numeral 9 denotes a connecting plate portion extending over the mounting plate portion 7 and the holding cylinder portion 8, and 10 denotes a plate-like reinforcing rib that reinforces the connecting plate portion 9.

  As shown in FIG. 2 and FIG. 7, a bottom plate portion 8 </ b> A (movement) that restricts the proximity movement of the end portion 4 </ b> A of the brace 4 is provided at the back side portion on one end side (the attachment plate portion 7 side) of the holding cylinder portion 8. An example of a regulation part) is provided.

  That is, the holding cylinder portion 8 is in a state in which a compressive force can be transmitted in the axial direction of the brace 4 by the contact between the end portion 4A of the brace 4 and the bottom plate portion 8A, and the holding cylinder portion 8 is connected to the holding cylinder portion 8 from the bottom plate portion 8A. The separation movement of the end portion 4A of the brace 4 is freely allowed within the range of the length dimension L up to the opening surface 8D (strictly, the length range obtained by subtracting the thickness of the buffer material 11 described later from the length dimension L). In the state, the end 4A of the brace 4 is held.

  The surface 8Aa (corresponding to the surface facing the brace end surface) of the bottom plate portion 8A is formed to be parallel or substantially parallel to the brace end surface 4Aa, and is perpendicular or substantially perpendicular to the axial direction of the brace 4. It is formed so that Further, as described above, the brace 4 is made of a wood-based material, and the wood fiber 4c is formed in a state along the axial direction of the brace 4, as shown in FIG. Therefore, the action direction of the compressive force acting from the bottom plate portion 8A and the fiber direction coincide (or substantially coincide), and the axial strength provided for the wood-based material can be fully exhibited.

  Moreover, as shown in FIG. 3, FIG. 6, FIG. 7, one side plate portion 8a among the four side plate portions 8a to 8d constituting the peripheral wall of the holding cylinder portion 8 of the holder 6, in this example, a mounting plate From the lid member 9 (an example of opening and closing means) that can be detachably attached to the side plate 8a on the side of the lateral side facing the front side (an example of the front side or the back side) of the frame 3 with the posture where the portion 7 is attached to the joint portion 5. It is configured.

  That is, the holder 6 is configured to attach and detach the lid member 9 from the remaining holder main body 13 so that the end 4A of the brace 4 is placed inside the holding cylinder portion 8 along the direction perpendicular to the construction surface of the frame 3. The insertion port 8B for insertion into (or removal from the inside of the holding cylinder portion 8) is configured to be openable and closable.

  The lid member 9 is a substantially U-shaped metal fitting in a cross-sectional view including a base plate portion 9A constituting the side plate portion 8a and a pair of mounting plate portions 9B extending from one end in the orthogonal direction to both ends thereof. As shown in FIG. 3, each mounting plate 9B is superposed from the outside with respect to each of the pair of side plate portions 8b and 8d constituting the opening edge of the insertion port 8B. By attaching with attachment means B such as the above, the holder body 13 is detachably attached.

  As shown in FIGS. 3 and 7, a cushioning material 11 made of a sealing material or the like is interposed between the opposing surfaces of the bottom plate portion 8 </ b> A of the holding cylinder portion 8 and the end portion 4 </ b> A of the brace 4, The initial dynamic compression between the bottom plate portion 8A and the end portion 4A of the brace 4 (in other words, the transmission of the initial tensile force) is buffered by the buffer material 11, and this initial dynamic compression is performed. The force prevents the joint portion 5 of the frame 3 from being damaged.

  The buffer material 11 is also interposed between opposing surfaces of the inner surfaces of the side wall portions 8 a to 8 d constituting the peripheral wall of the holding cylinder portion 8 and the outer peripheral surface of the end portion 4 </ b> A of the brace 4.

  As shown in FIGS. 4 to 7, the brace 4 is composed of four divided brace members 4 a having a weight (one example of a predetermined weight) that can be carried by one worker, as shown in FIG. 5. The two split brace members 4a adjacent to each other in the thickness direction are fixed to the fixing nail 12 (an example of the fixing means) at each of the portions that are biased to one side of each of the outer peripheral surfaces from the assembled state of the four split brace members 4a. ), And assembled at an appropriate place such as construction site. In addition, the division | segmentation brace member 4a is comprised from the laminated material in this example. The fixing means for fixing the divided brace member 4a is not limited to the fixing nail 12, but may be a screw, a screw, or the like.

  When an earthquake occurs, the frame 3 alternately has a vibration on the compression side with respect to the brace 4 made of a wooden material and a vibration on the tension side with respect to the brace 4. Then, it acts as follows with respect to each swing on the compression side and the tension side.

  First, regarding the swing of the frame 3 on the compression side with respect to the brace 4, the contact restriction of the close movement of the end portion 4 </ b> A of the brace 4 by the bottom plate portion 8 </ b> A formed on the holder 6 (see FIG. 2). As shown in FIG. 8 (a), a compressive force along the axial direction is transmitted to the brace 4 via the holder 6, and the brace 4 bears the compressive force, and resists the frame 3 from shaking. Demonstrate.

  On the other hand, with respect to the swing of the frame 3 on the tension side with respect to the brace 4, the end 4A of the brace 4 does not follow the deformation of the frame 3 as shown in FIG. By following the deformation of the frame 3, the end 4 </ b> A of the brace 4 and the bottom plate 8 </ b> A of the holder 6 are moved relatively apart by the dimension A, whereby the frame 3 and the end 4 </ b> A of the brace 4 are moved. It is avoided that a tensile force acts on the joint part (that is, the joint part between the holder 6 and the joint part 5).

  Therefore, according to this seismic frame structure, it is possible to make the frame 3 quake-proof in a state where a compression force is applied to the brace 4 made of a wooden material that is light and easy to process, and at the time of an earthquake. It is possible to prevent a disadvantage that the tensile force acts on the joint portion between the frame 3 and the end portion 4A of the brace 4 to break the joint portion.

  The earthquake-resistant frame structure configured as described above can be constructed, for example, as follows (see FIGS. 5 to 7).

  The said holder 6 and the said division | segmentation brace member 4a are conveyed to a construction site (the side of the newly installed or existing frame 3 used as the object of earthquake resistance). As described above, since the divided brace member 4a is set to a weight that can be carried by one person, it can be easily carried.

  Next, as shown in FIG. 6, with respect to each of the two joint portions 5 of the frame 3, the holder body 13 of each holder 6 and its insertion port 8 </ b> B face the front side of the frame 3. As shown in FIG. 5, the braces 4 are configured by assembling the divided brace members 4 a together with mounting in the same posture.

  The attachment work of the holder main body 13 can be easily performed because the attachment plate portion 7 is simply bonded and bonded to the inner surface of the joint portion 5 with the adhesive J.

  And in the state which provided the buffer material 11 in each inner surface 8a-8d of the holding | maintenance cylinder part 8 so that the buffer material 11 may interpose between each edge part 4A of the brace 4 and the inner surface of the holding cylinder part 8, FIG. As shown in FIG. 4, the brace 4 is operated in proximity to the frame 3 from the front side of the frame 3 to insert each end 4A of the brace 4 into the holding cylinder 8 through the insertion port 8B of the holder body 13, The lid member 9 is attached to each holder main body 13 to complete the earthquake resistant construction shown in FIG.

[Another embodiment]
(1) The wood-based material constituting the brace 4 is not limited to the laminated material shown in the above-described embodiment, and may be a solid material or the like. In short, any material that includes wood fibers at least in part may be used. .

  (2) In the above-described embodiment, the case where both the end portions 4A of the brace 4 are held by the holding tool 6 is shown as an example. However, one end portion 4A of the brace 4 is held by the holding tool 6. In this case, the other end portion 4A may adopt a separate joining structure (for example, rigid joining with a steel material or the like).

  (3) In the above-described embodiment, the example in which the holding portion that holds the end portion 4A of the brace 4 in the holding tool 6 is configured from the holding cylinder portion 8 that holds the end portion 4A of the brace 4 in the interior state is shown. For example, a plate-shaped or bar-shaped contact piece that contacts each part (intermediate portion in the width direction) of each surface (four surfaces) of the outer peripheral surface of the end portion 4A of the brace 4 is provided. You may make it hold | maintain the edge part 4A of the brace 4 in the state which carries out contact regulation of the movement to the direction which cross | intersects a brace axial center by this piece.

  (4) In the above-described embodiment, the case where one brace 4 made of a wood-based material is arranged for the two joints 5 of the frame 3 has been described as an example. For example, FIG. As described above, the two braces 4 and 4 ′ may be arranged in an X shape with respect to the four joint portions 5.

  In this case, for example, one brace 4 'is divided into two at the intersections of the braces 4, 4', and the middle part in the length direction of the other brace 4 is arranged between the opposite end faces, so that it can be detachably attached to the front side. The intersecting portion may be held by a deformed cylindrical joint member 14 having a lid member 14a.

  (5) In the above-described embodiment, the split brace 4a obtained by dividing the brace 4 by a predetermined weight is shown as an example of a narrow rectangular shape in which the brace 4 is vertically divided. It may be a thing.

  In this case, for example, as shown in FIG. 10, the end faces of the divided brace members 4a are assembled and held by the joint member 15 having the bottomed cylindrical (or bottomless cylindrical) holding cylinder portion 15a on both ends. It may be configured.

  Further, for example, as shown in FIG. 11, a plurality of divided brace members 4a each having a concave portion 4b formed on one end surface and a convex portion 4d formed on the other end surface may be divided into one divided brace between adjacent end surfaces. You may make it the structure assembled | attached in the state which fits the recessed part 4b of the material 4a, and the convex part 4d of the other division | segmentation brace 4a.

  (6) In the above-described embodiment, the example in which the divided braces 4a obtained by vertically dividing the braces 4 are assembled into a state in which a square member having a square cross section is formed into a square shape is shown in FIG. As shown in the figure, four small square bars having a rectangular cross section are assembled into a cross shape, or nine narrow square bars having a square cross section are square as shown in FIG. 12 (b). As shown in FIG. 12C, a plurality of plate members may be assembled in a state of a square cross section.

DESCRIPTION OF SYMBOLS 3 Frame 4, 4 'Brace 4Aa Brace end surface 4a Split brace member 4c Wood fiber 6 Holder 8 Holding cylinder part 8Aa Opposite surface with respect to brace end surface 8B Insertion port 11 Buffer material

Claims (5)

A seismic frame structure with braces made of wood material in the frame surface,
A holder that holds the end of the brace in a state that allows the movement of the end of the brace in the axial direction of the brace and restricts the close movement of the end of the brace is attached to the frame,
A seismic frame structure in which the brace is attached to the frame surface of the frame with at least one end held by the holder. The holder includes a holding cylinder portion that holds the end of the brace in an interior state,
The earthquake-resistant frame structure according to claim 1, wherein an insertion opening that can be opened and closed is provided on an outer peripheral side of the holding cylinder portion so that an end portion of the brace can be inserted therein.   The earthquake-resistant frame structure according to claim 1 or 2, wherein a cushioning material is interposed between opposed surfaces of the holding tool and an end of the brace in the axial direction of the brace.   The seismic frame structure according to any one of claims 1 to 3, wherein the brace is composed of a divided brace member that is divided so as to be assembled at predetermined weights. The brace is formed such that the wood fiber is in a state along the axial direction of the brace, and the brace end surface is formed to be perpendicular or substantially perpendicular to the axial direction of the brace,
The earthquake-resistant frame structure according to any one of claims 1 to 4, wherein the holding tool is formed such that a surface facing the brace end surface is parallel or substantially parallel to the brace end surface.

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