JP2020045693A - Outer wall panel attachment structure - Google Patents

Abstract

To provide an outer wall panel attachment structure capable not only mitigating load transmitted from a rigid frame structure to an outer wall panel but also suppressing locking of the outer wall panel.SOLUTION: An outer wall panel attachment structure is configured to attach outer wall panels 5 onto a rigid frame structure 10 composed of columns 2 and beams (ceiling beams 12, floor beams 11). In the outer wall panel attachment structure, the outer wall panels 5 are attached onto studs 4 placed between beams (the ceiling beams 12, the floor beams 11), and resistance members 20 are provided between the outer walls 4 and the beams (the ceiling beams 12, the floor beams 11) to reduce displacement of outer edges of the outer walls 5 relative to the rigid frame structure 10.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an outer wall panel mounting structure in which an outer wall panel is mounted on a ramen structure including columns and beams.

  Conventionally, a configuration is known in which an outer wall panel is attached to a stud spanned between beams of a ramen structure (for example, see Patent Document 1).

  Patent Document 1 discloses a configuration in which a spring portion that can be elastically deformed is formed at the upper end and the lower end of a stud. Thereby, the load transmitted from the ramen structure to the outer wall panel is reduced, and the occurrence of a phenomenon in which the outer wall panel is damaged in a chain can be suppressed.

Japanese Patent No. 4161002

  However, the configuration described in Patent Literature 1 has a problem that rocking in which the outer wall panel swings is more likely to occur than when the upper and lower ends of the studs are firmly fixed.

  Therefore, an object of the present invention is to provide an outer wall panel mounting structure that can reduce the load transmitted from the ramen structure to the outer wall panel and suppress the locking of the outer wall panel.

  In order to achieve the above object, an outer wall panel mounting structure of the present invention is an outer wall panel mounting structure in which an outer wall panel is mounted on a ramen structure including columns and beams, wherein the outer wall panel is provided between the beams. Attached to the spanned stud, the end of the stud is formed with a larger elastic deformation than the main body of the stud, and between the outer wall panel and the beam, the outer wall panel relative to the ramen structure is It is characterized by comprising a resistance member for reducing the relative displacement of the outer edge.

  Here, in the outer wall panel mounting structure of the present invention, the resistance member includes a first L-shaped portion mounted on the outer wall panel, a second L-shaped portion mounted on the beam, the first L-shaped portion, And a connecting portion for connecting to the second L-shaped portion.

  Further, in the outer wall panel mounting structure of the present invention, the resistance member connects the beam and the outer wall panel, and the resistance member may be sandwiched between the beam on the upper floor and the beam on the lower floor. Good.

  In the outer wall panel mounting structure according to the present invention, the resistance member may have an outer supporting portion that contacts an edge of the outer wall panel.

  In the outer wall panel mounting structure of the present invention, the outer wall panel may have an inner supporting portion that comes into contact with a vertical inner surface of the frame of the outer wall panel.

  Further, in the outer wall panel mounting structure of the present invention, the resistance member is provided on a plurality of convex portions provided on a surface of the outer wall panel facing the beam, and on a surface of the beam facing the convex portion. And a plurality of convex portions.

  Further, in the outer wall panel mounting structure of the present invention, the amount of deformation of the resistance member reaching the yield point may be smaller than the amount of deformation of the mounting member attaching the outer wall panel to the stud reaching the yield point.

  In the outer wall panel mounting structure of the present invention configured as described above, the outer wall panel is mounted on the stud spanned between the beams, and the end of the stud has a larger elastic deformation amount than the main body of the stud, and the outer wall has A resistance member is provided between the panel and the beam to reduce a relative displacement of an outer edge of the outer wall panel with respect to the rigid frame structure. Therefore, while the rigid frame structure is reinforced with the outer wall panel, the load transmitted from the rigid frame structure to the outer wall panel can be reduced, and locking of the outer wall panel can be suppressed.

  In the outer wall panel mounting structure of the present invention, the resistance member connects the first L-shaped portion mounted on the outer wall panel, the second L-shaped portion mounted on the beam, and the first L-shaped portion and the second L-shaped portion. With this configuration, relative displacement of the outer edge of the outer wall panel with respect to the rigid frame structure can be reduced, and locking can be suppressed.

  In the outer wall panel mounting structure of the present invention, the resistance member connects the beam and the outer wall panel, and the resistance member is sandwiched between the upper floor beam and the lower floor beam, so that the resistance member moves upward. Depending on the weight of the ramen structure on the floor, it can be sandwiched between the beams on the upper floor and the beams on the lower floor. Therefore, the resistance member can be installed by a simple method.

  Further, in the outer wall panel mounting structure of the present invention, the resistance member has the outer supporting portion abutting on the edge of the outer wall panel, thereby suppressing relative movement outward in the vertical direction with respect to the rigid frame structure. can do. Therefore, locking of the outer wall panel can be suppressed with a simple configuration.

  Further, in the outer wall panel mounting structure of the present invention, the resistance member has an inner supporting portion that abuts on the inner surface side of the outer wall panel in the vertical direction, so that the outer wall panel is perpendicular to the ramen structure. To suppress relative movement inward. Therefore, locking of the outer wall panel can be suppressed with a simple configuration.

  In the outer wall panel mounting structure of the present invention, the resistance member includes a plurality of protrusions provided on a surface of the outer wall panel facing the beam, and a plurality of protrusions provided on the surface of the beam facing the protrusion. , The protrusion provided on the outer wall panel side is caught by the protrusion provided on the beam side, and the relative displacement of the outer edge of the outer wall panel with respect to the rigid frame structure can be reduced. Therefore, locking of the outer wall panel can be suppressed with a simple configuration.

  Further, in the outer wall panel mounting structure of the present invention, the amount of deformation of the resistance member reaching the yield point is smaller than the amount of deformation of the mounting member for mounting the outer wall panel on the stud, so that the load at which the resistance member is plasticized is reduced. Can be made smaller than the load at which the mounting member is plasticized. Therefore, for example, at the time of a large earthquake or a strong wind, the resistance member can be brought into the yielding state earlier than the mounting member. As a result, it is possible to provide an outer wall panel mounting structure in which the initial rigidity is improved and locking is suppressed.

FIG. 2 is a perspective view illustrating a configuration of a building unit according to the first embodiment. It is the figure which looked at the structure which attached the outer wall panel to the stud of Example 1 from the building interior side. FIG. 2 is a perspective view illustrating a configuration of an outer wall panel according to the first embodiment. It is sectional drawing which shows the attachment structure to the stud of the outer wall panel of Example 1. It is a figure which shows the attachment structure of the pillar of Example 1 to a beam, FIG.5 (a) is a perspective view explaining the structure of the connection structure of the edge part of a pillar, and FIG.5 (b) shows tensile force to a pillar. FIG. 4 is a side view illustrating a state in which is acting. FIG. 3 is an exploded perspective view showing the resistance member of the first embodiment and its periphery. FIG. 3 is a cross-sectional view illustrating a resistance member according to the first embodiment and a periphery thereof. FIG. 9 is a perspective view illustrating a modification of the resistance member according to the first embodiment. It is a figure which shows the deformation | transformation of the building unit at the time of a horizontal external force of Example 1, and the movement of an outer wall panel. FIG. 4 is a model diagram illustrating an analysis model of a building unit according to the first embodiment. It is a schematic diagram which shows the analysis result which carried out the incremental analysis of the analysis model of the building unit of Example 1. FIG. 10 is a cross-sectional view illustrating a resistance member according to a second embodiment and the periphery thereof. FIG. 9 is a perspective view illustrating a resistance member according to a second embodiment and a periphery thereof. FIG. 10 is a cross-sectional view illustrating a modification of the resistance member according to the second embodiment. FIG. 10 is a cross-sectional view illustrating a modification of the resistance member according to the second embodiment. FIG. 10 is a cross-sectional view illustrating a resistance member according to a third embodiment and a periphery thereof. FIG. 13 is a perspective view illustrating a configuration of a resistance member according to a third embodiment. It is a figure explaining an operation of a convex part when a horizontal external force is applied to the building unit of Example 3. It is a figure explaining the rigidity of the outer wall panel of Example 3. FIG. 13 is a schematic view illustrating a modification of the resistance member according to the third embodiment. It is a figure which shows the relationship between the resisting force with respect to the locking of the outer wall panel of Example 3, and displacement.

  Hereinafter, embodiments for realizing the outer wall panel mounting structure according to the present invention will be described based on Examples 1 to 3 shown in the drawings.

  The outer wall panel mounting structure in the first embodiment is applied to a building unit constituting a unit building.

[Configuration of building unit]
FIG. 1 is a perspective view illustrating the configuration of the building unit according to the first embodiment. FIG. 2 is a diagram illustrating a configuration in which an outer wall panel is attached to a stud of the first embodiment as viewed from the inside of a building. Hereinafter, a configuration of the unit building according to the first embodiment will be described with reference to FIGS. 1 and 2.

  As shown in FIG. 1, the building unit 1 includes four pillars 2 arranged at four corners, a ceiling beam 12 as a beam suspended between upper ends thereof, and a beam suspended between lower ends thereof. The main frame is a ramen structure 10 as a frame structure composed of the floor beams 11 of FIG.

  The column 2, the ceiling beam 12 and the floor beam 11 are rigidly connected. However, the rigid connection is not limited to the one in which the angle between the column 2 and the ceiling beam 12 or the floor beam 11 does not change at all. This also includes those joined by semi-rigid joints as realistic structures. A plurality of small beams 13 are bridged between the floor beams 11 at predetermined intervals.

  Five pillars 4 for attaching four outer wall panels 5 are arranged between the pillars 2 on the front side in FIG.

  As shown in FIGS. 1 and 2, the stud 4 has an upper end connected to the ceiling beam 12 and a lower end connected to the floor beam 11. Side edges of two separate outer wall panels 5 are respectively joined to the three intermediate studs 4 except for the studs 4 adjacent to the pillar 2.

  The outer wall panel 5 is provided with two resistance members 20 at the upper part and the lower part of the outer wall panel 5, respectively. The outer wall panel 5 is attached to the ceiling beam 12 and the floor beam 11 via the resistance member 20.

[Structure of outer wall panel]
FIG. 3 is a perspective view illustrating the configuration of the outer wall panel according to the first embodiment. FIG. 4 is a cross-sectional view illustrating the structure for attaching the outer wall panel to the stud of the first embodiment. Hereinafter, the configuration of the outer wall panel according to the first embodiment will be described with reference to FIGS. 3 and 4.

  As shown in FIGS. 3 and 4, the outer wall panel 5 mainly includes a hard wood chip cement board 5 a as a rectangular face material and a frame 5 b arranged on the edge on the back side of the hard wood chip cement board 5 a. Be composed.

  The hard wood chip cement plate 5a is fixed to the frame 5b by a plurality of screw nails.

  As shown in FIGS. 2 and 4, the stud 4 and the outer wall panel 5 are joined by a rivet 6 as a mounting member. The rivet 6 is a one-side rivet, and the frame 5b and the stud 4 can be joined only by driving in from the stud 4 side. The outer wall panel 5 configured as described above is configured as a bearing wall.

[Stud mounting structure]
5A and 5B are diagrams illustrating a mounting structure of a stud to a beam according to the first embodiment. FIG. 5A is a perspective view illustrating a configuration of a connection structure at an end of the stud, and FIG. It is a side view explaining the state where a tensile force acts on a stud. Hereinafter, the mounting structure of the pillar according to the first embodiment will be described with reference to FIG.

  As shown in FIG. 5A, the stud 4 includes a main body 4a having a substantially cono-shaped cross section, and a spring 41 formed at an end in the longitudinal direction of the main body 4a. The stud 4 is connected to the floor beam 11 via a spring portion 41.

  The spring portion 41 is formed only of a cono-shaped web portion so that the cross-sectional area is smaller than that of the main body portion 4a having a substantially cono-shaped cross section. That is, in the spring portion 41, a flat small cross-section portion 41a in which both sides of the cono-shape are cut out is formed, and the small cross-section portion 41a is bent at a substantially right angle from the middle to form an end face portion 41b. ing. That is, the spring portion 41 is formed to have a larger elastic deformation amount than the main body portion 4a.

  The end face portion 41b has two holes through which connection bolts 7 for connecting the stud 4 and the floor beam 11 are inserted.

  A rivet hole 4d as a hole through which the rivet 6 is inserted is opened in the main body 4a of the stud 4.

  When a tensile force acts on the stud 4 connected to the floor beam 11 via the spring portion 41 configured as described above, the spring portion 41 extends more than the main body portion 4a as shown in FIG. Large elastic deformation. Therefore, the load transmitted from the ramen structure 10 to the outer wall panel 5 is reduced, and the occurrence of the phenomenon that the outer wall panel 5 is successively damaged can be suppressed.

  Note that the upper end of the stud 4 and the ceiling beam 12 are also connected by the same connection structure as the spring portion 41.

[Configuration of resistance member]
FIG. 6 is an exploded perspective view showing the resistance member according to the first embodiment and the periphery thereof. FIG. 7 is a cross-sectional view illustrating the resistance member according to the first embodiment and the periphery thereof. Hereinafter, the configuration of the resistance member according to the first embodiment will be described with reference to FIGS. 6 and 7. Since the configuration of the resistance member 20 attached to the ceiling beam 12 and the configuration of the resistance member 20 attached to the floor beam 11 are similar, the configuration of the resistance member 20 attached to the ceiling beam 12 is similar. And the description of the configuration of the resistance member 20 attached to the floor beam 11 side will be omitted.

  The resistance member 20 connects the ceiling beam 12 and the frame 5b of the outer wall panel 5 to reduce the relative displacement of the outer edge of the outer wall panel 5 with respect to the rigid frame structure 10. 6 and 7, the resistance member 20 includes a first L-shaped portion 21 attached to the frame 5b of the outer wall panel 5, a second L-shaped portion 22 attached to the ceiling beam 12, and a first L-shaped portion. 21 and a connecting portion 23 for connecting the second L-shaped portion 22.

  The first L-shaped portion 21 is made of metal and has an L-shaped cross section. The first L-shaped portion 21 has a plurality of mounting holes 21 a for mounting the first L-shaped portion 21 to the frame 5 b of the outer wall panel 5 on a surface forming a long side and a surface forming a short side of an L-shaped cross section. It is formed. The first L-shaped portion 21 is attached to the frame 5b by fasteners 8 such as bolts, screws, or nails via the attachment holes 21a with the inner surface thereof in contact with the frame 5b of the outer wall panel 5.

  The second L-shaped portion 22 is made of metal and has an L-shaped cross section. In the second L-shaped portion 22, a plurality of mounting holes 22a for mounting the second L-shaped portion 22 to the ceiling beam 12 are formed on a surface forming a long side and a surface forming a short side of an L-shaped cross section. . The second L-shaped portion 22 is attached to the ceiling beam 12 by the fastener 8 through the attachment hole 22a with the inner surface thereof in contact with the ceiling beam 12.

  The connection part 23 connects the surface forming the long side of the L-shaped section of the first L-shaped part 21 and the surface forming the long side of the L-shaped cross section of the second L-shaped part 22.

  The connecting portion 23 is configured such that the deformation amount of the connecting portion 23 reaching the yield point is smaller than the deformation amount of the rivet 6 as a mounting member for attaching the outer wall panel 5 to the stud 4 reaching the yield point.

  Note that the floor beam 11 and the frame 5b of the outer wall panel 5 are also connected by the same connection structure as the resistance member 20.

  The material of the connection portion 23 can be selected from a metal-based material, a rubber-based material, a viscoelastic-based material, and the like, and can adjust the shear (bending) rigidity and the shear (bending) resistance of the resistance member 20. .

  For example, a polymer material having viscoelastic properties depending on the strain rate of the material, chloroprene rubber, or acrylic rubber may be used as the material of the connection portion 23. This makes it possible to increase the amount of attenuation with respect to a horizontal external force having a high repetition rate (high frequency) such as an earthquake as compared with a general strain-dependent material such as carbon steel. Therefore, the resistance to locking of the outer wall panel 5 can be increased. Further, in the case of the strain-dependent type, where a large force is applied to the member, the member joint, and the structure around the joint, since the phase of the strain and the resistance of the resistance member 20 are different, this can be suppressed.

  The shear (bending) rigidity of the resistance member 20 is changed by changing the shear modulus, the length e, the thickness t, the reference strength and the tensile strength of the resistance member 20, the shape of the resistance member 20, and the like. And the shear (bending) strength can be adjusted. For example, as shown in FIG. 8, the first L-shaped portion 21 and the second L-shaped portion 22 may be a resistance member 120 connected by a connection portion 123 formed in a prismatic shape.

[Deformation of unit building and movement of outer wall panel]
FIG. 9 is a diagram illustrating the deformation of the building unit and the movement of the outer wall panel when a horizontal external force is applied according to the first embodiment. Hereinafter, the deformation of the unit building and the movement of the outer wall panel according to the first embodiment will be described with reference to FIG.

  As shown in FIG. 9, when a horizontal external force E acts on the building unit 1 due to an earthquake, wind, or the like, at first, the outer wall panel 5 connecting the studs 4 acts like a brace. Therefore, it works with the ramen structure 10 to suppress the swing of the building unit 1. That is, when the horizontal external force E within the design value is applied, the rigid frame structure 10 and the outer wall panel 5 resist the horizontal external force E.

  At this time, a force for rocking (locking) acts on the outer wall panel 5 in the direction of the arrow S in FIG. 9, and the resistance member 20 acts to resist this force. Therefore, the resistance member 20 functions to suppress the swing of the outer wall panel 5.

  When the horizontal external force E increases, the amount of deformation of the rigid frame structure 10 increases, and the connection portion 23 reaches the yield point. When the horizontal external force E further increases, the amount of deformation of the ramen structure 10 further increases, and the rivet 6 reaches the yield point.

  Thereby, it is possible to prevent the outer wall panel 5 from gradually receiving the load. Therefore, although the amount of deformation of the building unit 1 increases, seismic energy can be absorbed thereby, so that catastrophic damage to the ramen structure 10 and the outer wall panel 5 can be prevented. That is, when a horizontal external force E larger than the design value is applied, the original characteristic of absorbing energy by deformation of the rigid frame structure 10 is exhibited, and the horizontal external force E is resisted. When the outer wall panel 5 receives no load, the expansion and contraction of the spring portion 41 of the stud 4 increases, and the building unit 1 can withstand the subsequent increase in seismic force, and can prevent collapse and collapse.

[Analysis confirming horizontal strength of building unit 1]
FIG. 10 is a model diagram illustrating an analysis model of the building unit according to the first embodiment. FIG. 11 is a schematic diagram illustrating an analysis result obtained by incrementally analyzing the analysis model of the building unit according to the first embodiment. Hereinafter, based on FIG. 10 and FIG. 11, an analysis in which the horizontal proof stress of the building unit 1 of the first embodiment is confirmed will be described.

  FIG. 10 shows a building unit model 1A in which the building unit 1 is two-dimensionally modeled for analysis.

  Here, the ramen structure model 10A is supported at the fulcrum 111A immediately below the two column models 2A, and the joint between the column model 2A, the ceiling beam model 12A, and the floor beam model 11A is modeled by a rotary spring 25A.

  A spring part model 41A is provided above and below the stud model 4A, and the stud model 4A is connected to an outer wall panel model 5A via an attachment member model 6A. Further, a resistance member model 20A is provided above and below the outer wall panel model 5A.

  The outer wall panel model 5A is replaced with a rigid one (a large one having a brace diameter of 1000 mm or the like).

  Then, a horizontal external force E is applied to the building unit model 1A, and the relationship between the horizontal resistance P and the interlayer deformation amount δ is calculated by the incremental analysis method. Here, the simulation after the shear force entering the mounting member model 6A reaches the maximum load is a model in which the outer wall panel model 5A of that part is removed, and the subsequent simulation is performed.

  For comparison, a first comparative model without the resistance member model 20A and a second comparison model without the resistance member model 20A, the stud model 4A and the outer wall panel model 5A were also analyzed.

  FIG. 11 is a diagram showing an envelope as a result of repeatedly applying a horizontal load to each model in a relationship between the horizontal resistance P and the interlayer deformation amount δ. Here, the interlayer deformation amount δ refers to a horizontal displacement difference between the first floor and the second floor. The height h indicates the height of the building unit model 1A. In this building unit model 1A, since the floor beam model 11A does not move horizontally, the horizontal displacement of the ceiling beam model 12A is the interlayer deformation δ.

  The envelope S1 shown by the dashed line in FIG. 11 shows the restoring force characteristics of the outer wall panel mounting structure model of the first embodiment. The envelope S2 shown by the dotted line in FIG. 11 shows the restoring force characteristics of the first comparative model without the resistance member model 20A. The envelope S3 shown by the solid line in FIG. 11 shows the restoring force characteristics of the second comparative model in which the resistance member model 20A, the stud model 4A, and the outer wall panel model 5A are not arranged.

  As shown in FIG. 11, when the interlayer deformation amount δ is h / 120, the horizontal resistance of the outer wall panel mounting structure model of the first embodiment is the horizontal resistance Py2. On the other hand, the horizontal resistance of the first comparative model in which the resistance member model 20A is not disposed is a horizontal resistance Py1 smaller than the horizontal resistance Py2. Furthermore, the horizontal resistance of the second comparative model in which the resistance member model 20A, the stud model 4A, and the outer wall panel model 5A are not arranged is a horizontal resistance Py0 smaller than the horizontal resistance Py1.

  Therefore, it can be seen that the outer wall panel mounting structure model of Example 1 has improved initial rigidity of the unit building as compared with the first comparative model and the second comparative model. In other words, it can be said that the structure does not easily shake in a small earthquake.

  Further, it can be seen that the maximum horizontal resistance Pmax of the outer wall panel attachment structure model of the first embodiment can be designed to be the maximum horizontal resistance Pmax of the first comparative model. Therefore, it is possible to prevent an excessive external force from being applied to members to which the outer wall panel 5 is connected, such as the floor beams 11, the ceiling beams 12, the studs 4, and the foundation structure.

  That is, when the horizontal external force E is applied, the outer wall panel mounting structure model of the first embodiment can start to exhibit the effect of increasing the rigidity before the spring portion 41 starts to expand. Further, in the outer wall panel mounting structure model of the first embodiment, when the large horizontal external force E acts, the resistance member 20 can be plasticized before the rivet 6 plasticizes. Therefore, the outer wall panel mounting structure model of the first embodiment can improve the initial rigidity while making the maximum horizontal resistance Pmax the same as the conventional first comparative model.

[Function of outer wall panel mounting structure]
Next, the operation of the outer wall panel mounting structure according to the first embodiment will be described. The outer wall panel mounting structure according to the first embodiment is an outer wall panel mounting structure in which an outer wall panel 5 is mounted on a ramen structure 10 including columns 2 and beams (ceiling beams 12, floor beams 11). In this outer wall panel mounting structure, the outer wall panel 5 is mounted on the stud 4 bridged between the beams (the ceiling beam 12 and the floor beam 11), and the end of the stud 4 is elastically deformed from the main body 4 a of the stud 4. A resistance member 20 is formed between the outer wall panel 5 and the beam (the ceiling beam 12 and the floor beam 11), which reduces the relative displacement of the outer edge of the outer wall panel 5 with respect to the rigid frame structure 10 (FIG. 7). .

  Thus, while the rigid frame structure 10 is reinforced with the outer wall panel 5, the load transmitted from the rigid frame structure 10 to the outer wall panel 5 is reduced, and the relative displacement of the outer wall panel 5 with respect to the rigid frame structure 10 is reduced. it can. Therefore, locking of the outer wall panel 5 is suppressed, and an outer wall panel mounting structure with improved rigidity can be obtained. In addition, since locking of the outer wall panel 5 can be suppressed, it is possible to prevent an excessive load from being applied to peripheral members to which the outer wall panel 5 is joined.

  In the outer wall panel mounting structure of the first embodiment, the resistance member 20 includes a first L-shaped portion 21 mounted on the outer wall panel 5 and a second L-shaped portion 22 mounted on the beams (the ceiling beams 12 and the floor beams 11). A first L-shaped portion 21 and a connecting portion 23 for connecting the second L-shaped portion 22 are provided (FIG. 6).

  Thereby, the connecting portion 23 can reduce the relative displacement of the outer edge of the outer wall panel 5 with respect to the rigid frame structure 10. Therefore, locking of the outer wall panel 5 can be suppressed with a simple configuration. Further, by adjusting the shape and the material of the connection portion 23, the resistance characteristic of the outer wall panel 5 against locking can be changed. Therefore, the locking of the outer wall panel 5 can be effectively suppressed by adjusting the connection portion 23 that matches the ramen structure 10 and the outer wall panel 5.

  In the outer wall panel mounting structure of the first embodiment, the amount of deformation of the resistance member 20 reaching the yield point is smaller than the amount of deformation of the mounting member (rivet 6) for attaching the outer wall panel 5 to the stud 4 reaching the yield point.

  Thereby, the load at which the resistance member 20 plasticizes can be made smaller than the load at which the mounting member (rivet 6) plasticizes. Therefore, for example, at the time of a large earthquake or a strong wind, the resistance member 20 can be brought into the yielding state earlier than the attachment member (rivet 6). As a result, it is possible to provide an outer wall panel mounting structure in which the initial rigidity is improved and locking is suppressed.

  The outer wall panel mounting structure according to the second embodiment is different from the outer wall panel mounting structure according to the first embodiment in that the configuration of the resistance member is different.

[Configuration of outer wall panel mounting structure]
FIG. 12 is a cross-sectional view illustrating the resistance member according to the second embodiment and the periphery thereof. FIG. 13 is a perspective view illustrating the resistance member according to the second embodiment and the periphery thereof. Hereinafter, the configuration of the outer wall panel mounting structure of the second embodiment will be described with reference to FIGS. Note that the same or equivalent parts as those described in the above embodiments will be described using the same terms or the same reference numerals. In addition, since the configuration of the resistance member 220 attached to the ceiling beam 12 and the configuration of the resistance member 220 attached to the floor beam 11 are similar, the configuration of the resistance member 220 attached to the ceiling beam 12 side And the description of the configuration of the resistance member 220 attached to the floor beam 11 side will be omitted.

  The resistance member 220 of the second embodiment connects the floor beam 11 on the upper floor and the ceiling beam 12 on the lower floor, and the frame 5b of the outer wall panel 5, and the outer edge of the outer wall panel 5 relative to the ramen structure 10. Reduce displacement.

  The resistance member 220 is formed of a steel material, and as shown in FIGS. 12 and 13, a first overhang 220 a extending in the horizontal direction, and a second overhang extending horizontally from the tip of the first overhang 220 a. A second overhanging portion 220b, a vertical portion 220d extending vertically from a connection portion between the first overhanging portion 220a and the second overhanging portion 220b, and a second extending portion extending horizontally from an end of the vertical portion 220d. From the three overhangs 220c, a cross section is formed in a substantially J-shape.

  The first overhang 220a is sandwiched between the ceiling beam 12 on the lower floor and the floor beam 11 on the upper floor. The first overhang 220a is fixed by the weight of the building unit 1 on the upper floor.

  The frame 5b of the outer wall panel 5 is inserted into a groove formed by the second overhang 220b, the vertical portion 220d, and the third overhang 220c. In this state, the second overhang 220b contacts the edge of the outer wall panel 5. Further, the third overhang 220c abuts on the inner side of the frame 5b of the outer wall panel 5 in the vertical direction. Here, the second overhang portion 220b forms an outer support portion that supports the outer wall panel 5 from the outside in the vertical direction. The third overhang 220c forms an inner support that supports the outer wall panel 5 from the inside in the vertical direction.

  The resistance member 220 is configured such that the amount of deformation of the resistance member 220 reaching the yield point is smaller than the amount of deformation of the rivet 6 as a mounting member for attaching the outer wall panel 5 to the stud 4 reaching the yield point.

  Note that the floor beam 11 and the frame 5b of the outer wall panel 5 are also connected by the same connection structure as the resistance member 220.

  The shear modulus of the resistance member 220, the length d1, the thickness t1, and the width w1 of the second overhang 220b, the length d2, the thickness t2, and the width w2 of the third overhang 220c, and the resistance member 220 By adjusting the Young's modulus of the resistance member 220, the reference strength and the tensile strength of the material of the resistance member 220, the shear (bending) rigidity and the shear (bending) resistance of the resistance member 220 can be adjusted.

  As shown in FIG. 14, the resistance member 320 includes a first overhang 220a extending horizontally and a second overhang 220b extending horizontally from the tip of the first overhang 220a. , May be formed in an I shape.

  As shown in FIG. 15, the resistance member 420 includes a first overhang 220a extending in the horizontal direction, a vertical portion 220d extending vertically from an end of the first overhang 220a, The third overhang 220c extending in the horizontal direction from the end of the portion 220d may be formed in a substantially Z-shaped cross section.

[Function of outer wall panel mounting structure]
Next, the operation of the outer wall panel mounting structure according to the second embodiment will be described. In the outer wall panel mounting structure according to the second embodiment, the resistance members 220, 320, 420 connect the beams (the floor beams 11, the ceiling beams 12) and the outer wall panel 5, and the resistance members 220, 320, 420 are located on the upper floor. It is sandwiched between a beam (floor beam 11) and a beam on the lower floor (ceiling beam 12) (FIG. 12).

  Thus, the resistance members 220, 320, and 420 can be sandwiched between the beam on the upper floor (the floor beam 11) and the beam on the lower floor (the ceiling beam 12) due to the weight of the ramen structure 10 on the upper floor. Therefore, the resistance members 220, 320, and 420 can be installed by a simple method.

  In the outer wall panel mounting structure according to the second embodiment, the resistance members 220, 320, and 420 have an outer support portion (second overhang portion 220b) that comes into contact with the edge of the outer wall panel 5 (FIG. 12).

  Thereby, it is possible to suppress the outer wall panel 5 from relatively moving outward in the vertical direction with respect to the ramen structure 10. Therefore, locking of the outer wall panel 5 can be suppressed with a simple configuration.

  In the outer wall panel mounting structure according to the second embodiment, the resistance members 220 and 420 have an inner support portion (third overhang portion 220c) that comes into contact with the vertical inner surface of the frame 5b of the outer wall panel 5 (FIG. 12). .

  Accordingly, it is possible to suppress the outer wall panel 5 from relatively moving inward in the vertical direction with respect to the ramen structure 10. Therefore, locking of the outer wall panel 5 can be suppressed with a simple configuration.

  Note that the other configuration, operation, and effect are substantially the same as those in the above-described embodiment, and thus description thereof is omitted.

  The outer wall panel mounting structure of the third embodiment is different from the outer wall panel mounting structures of the first and second embodiments in that the configuration of the resistance member is different.

[Configuration of outer wall panel mounting structure]
FIG. 16 is a cross-sectional view illustrating the resistance member according to the third embodiment and the periphery thereof. FIG. 17 is a perspective view illustrating the configuration of the resistance member according to the third embodiment. Hereinafter, the configuration of the outer wall panel mounting structure according to the third embodiment will be described with reference to FIGS. 16 and 17. Note that the same or equivalent parts as those described in the above embodiments will be described using the same terms or the same reference numerals. Since the configuration of the resistance member 520 attached to the ceiling beam 12 and the configuration of the resistance member 520 attached to the floor beam 11 are similar, the configuration of the resistance member 520 attached to the ceiling beam 12 is similar. And the description of the configuration of the resistance member 520 attached to the floor beam 11 side will be omitted.

  As shown in FIGS. 16 and 17, the resistance member 520 according to the third embodiment includes a plurality of protrusions 520 a provided on the frame 5 b of the outer wall panel 5 and a plurality of protrusions 520 b provided on the ceiling beam 12. And the relative displacement of the outer edge of the outer wall panel 5 with respect to the rigid frame structure 10 is reduced.

  The protrusion 520a has a truncated cone shape, and is formed on the frame 5b by, for example, press working. Note that the steel plate may be pressed and attached to the frame 5b. By the plurality of convex portions 520a, an uneven shape is formed on the frame 5b.

  The convex portion 520b has a truncated cone shape, and is formed on the ceiling beam 12 by, for example, press working. The steel plate may be pressed and attached to the ceiling beam 12. An uneven shape is formed on the ceiling beam 12 by the plurality of convex portions 520b.

  The outer wall panel 5 is attached to the stud 4 in a state where the uneven shape of the frame 5b and the uneven shape of the ceiling beam 12 are engaged with each other.

  Note that the floor beam 11 and the frame 5b of the outer wall panel 5 are also connected by the same connection structure as the resistance member 520.

[Motion of outer wall panel]
FIG. 18 is a diagram illustrating the operation of the protrusion when a horizontal external force is applied to the building unit according to the third embodiment. FIG. 19 is a diagram illustrating the rigidity of the outer wall panel according to the third embodiment. Hereinafter, the movement of the outer wall panel according to the third embodiment will be described with reference to FIGS.

  When the outer wall panel 5 attempts to rock (lock), the projection 520a of the frame 5b of the outer wall panel 5 and the projection 520b of the ceiling beam 12 collide. When the convex portion 520a and the convex portion 520b collide, as shown in FIG. 18, a resistance force F is generated, and an out-of-plane force G = Fcos θ · sin θ of the outer wall panel 5 is generated.

The resistance force F is a horizontal force generated in the convex portions 520a and 520b when the outer wall panel 5 is locked. The solid angle θ is the solid angle of the convex portions 520a and 520b.
The height at which the convex portions 520a and 520b collide with each other is defined as a height H. The distance from the upper end or the lower end of the outer wall panel 5 to the mounting position of the rivet 6 to the stud 4 is defined as a distance L.

Here, the outer wall panel 5 is in a cantilever state from the upper end or the lower end to the attachment position of the stud 4 with the rivet 6. Then, in the cantilever state, the in-plane rigidity K = 3EI / L ³ with respect to the out-of-plane force G, as shown in FIG. Therefore, the distance L from the upper end or the lower end, which is the free end of the outer wall panel 5, to the mounting position (first joining point) to the stud 4 by the rivet 6, and the solid angle θ between the convex portions 520a and 520b are adjusted. Thus, the resistance F can be adjusted.

  Note that the shapes of the convex portions 520a and 520b are not limited to this mode. For example, as illustrated in FIG. 20A, the resistance member 620 includes a plurality of hemispherical protrusions 620 a provided on the frame 5 b of the outer wall panel 5 and a plurality of hemispherical protrusions provided on the ceiling beam 12. And the unit 620b.

  Further, as shown in FIG. 20B, the resistance member 720 includes a plurality of protrusions 620 a provided on the frame 5 b of the outer wall panel 5 and a plurality of protrusions 620 b provided on the ceiling beam 12. May be done. The convex portions 620a and 620b are formed in a shape (Fuji mountain shape) in which the slope of the truncated cone has a concave curved surface.

[Resistance and displacement against rocking of outer wall panel]
FIG. 21 is a diagram illustrating a relationship between a resistance and a displacement with respect to locking of the outer wall panel according to the third embodiment. Hereinafter, the resistance and the displacement of the outer wall panel against rocking of the third embodiment will be described with reference to FIG.

  As shown in FIG. 21, the resistance member 520 has a resistance characteristic such that a large in-plane displacement between the outer wall panel 5 and the ceiling beam 12 due to the locking is generated, and a large resistance to the locking of the outer wall panel 5 is generated. Can be.

  On the other hand, the resistance member 620 can have a resistance characteristic that increases the resistance to the locking of the outer wall panel 5 in proportion to the in-plane displacement between the outer wall panel 5 and the ceiling beam 12 due to the locking.

  In addition, the resistance member 720 has a resistance characteristic such as hardening that the resistance to locking of the outer wall panel 5 increases in a quadratic curve as the in-plane displacement between the outer wall panel 5 and the ceiling beam 12 due to locking increases. can do.

That is, the solid angle θ of the resistance members 520, 620, and 720, the shape of the slope, and the height H
, A wide range of resistance characteristics can be realized.

[Function of outer wall panel mounting structure]
Next, the operation of the outer wall panel mounting structure according to the third embodiment will be described. In the outer wall panel mounting structure according to the third embodiment, the resistance members 520, 620, and 720 include a plurality of protrusions 520b, 620b, and 720b provided on a surface of the outer wall panel 5 that faces the beams (the ceiling beams 12 and the floor beams 11). And a plurality of protrusions 520a, 620a, 720a provided on the surface of the beam (the ceiling beam 12, the floor beam 11) facing the protrusions 520b, 620b, 720b (FIG. 16).

  As a result, the protrusions 520b, 620b, 720b provided on the outer wall panel 5 are caught by the protrusions 520a, 620a, 720a provided on the beams (the ceiling beam 12, the floor beam 11), and the outer wall panel with respect to the ramen structure 10. 5 can be reduced in relative displacement. Therefore, locking of the outer wall panel 5 can be suppressed with a simple configuration.

  Further, by adjusting the shapes of the convex portions 520a, 620a, 720a, 520b, 620b, and 720b, the resistance characteristic of the outer wall panel 5 against locking can be changed. Therefore, by adjusting the protrusions 520a, 620a, 720a, 520b, 620b, 720b to a shape suitable for the ramen structure 10 and the outer wall panel 5, locking of the outer wall panel 5 can be effectively suppressed.

  Note that the other configuration, operation, and effect are substantially the same as those in the above-described embodiment, and thus description thereof is omitted.

  The outer wall panel mounting structure of the present invention has been described based on the first to third embodiments. However, the specific configuration is not limited to these embodiments, and combinations of the embodiments, design changes, additions, and the like can be made without departing from the gist of the invention according to each claim of the claims. Is acceptable.

  In the first to third embodiments, the example in which the outer wall panel 5 is constituted by the hard wood chip cement plate 5a and the frame 5b has been described. However, the outer wall panel is not limited to this mode, and may be composed of, for example, a steel plate and a frame or a gypsum board and a frame.

  In the first to third embodiments, the example in which the attachment member is the rivet 6 is described. However, the attachment member may be a nail, a screw, a bolt, or the like.

  In the second embodiment, an example is shown in which the first overhang portion 220a is fixed by being sandwiched between the ceiling beam 12 on the lower floor and the floor beam 11 on the upper floor. In addition, the frame 5b is inserted into a concave groove formed by the second overhanging portion 220b, the vertical portion 220d, and the third overhanging portion 220c, and the second overhanging portion 220b, the vertical portion 220d, The example which fixed the 3rd overhang part 220c was shown. However, the first overhanging portion, the second overhanging portion, the third overhanging portion, and the vertical portion may be fixed with screws, bolts, nails, or the like.

  In the third embodiment, the resistance members 520, 620, 720 are formed by connecting the plurality of protrusions 520 a, 620 a, 720 a provided on the frame 5 b of the outer wall panel 5 and the plurality of protrusions 520 b, 620 b, provided on the ceiling beam 12. 720b is shown as an example. However, a friction sheet such as sandpaper may be used as the resistance member.

  Embodiments 1 to 3 show examples in which the present invention is applied to a unit building constituted by the ramen structure 10. However, the present invention can also be applied to a building constituted by a framed structure combining wooden columns and beams. Further, the present invention can be applied to an outer wall panel having an opening.

1 building unit 2 pillar 4 stud 5 outer wall panel 6 rivet (example of mounting member)
10 Ramen structure 11 Floor beam (an example of beam)
12 Ceiling beams (an example of beams)
DESCRIPTION OF SYMBOLS 20 Resistance member 21 1st L-shaped part 22 2nd L-shaped part 23 Connection part 220b 2nd overhang part (an example of an outer side support part)
220c Third overhang (example of inner support)
520a convex part 520b convex part

Claims (7)

An outer wall panel attachment structure in which an outer wall panel is attached to a ramen structure composed of columns and beams,
The outer wall panel is attached to a stud spanned between the beams,
The end of the stud has a larger elastic deformation than the main body of the stud,
An outer wall panel mounting structure, comprising: a resistance member that reduces a relative displacement of an outer edge of the outer wall panel with respect to the rigid frame structure, between the outer wall panel and the beam. The resistance member,
A first L-shaped portion attached to the outer wall panel;
A second L-shaped portion attached to the beam;
The outer wall panel mounting structure according to claim 1, further comprising: a connecting portion that connects the first L-shaped portion and the second L-shaped portion. The resistance member connects the beam and the outer wall panel,
The outer wall panel mounting structure according to claim 1, wherein the resistance member is sandwiched between the beam on an upper floor and the beam on a lower floor. The outer wall panel mounting structure according to claim 3, wherein the resistance member has an outer supporting portion that contacts an edge of the outer wall panel. 5. The outer wall panel mounting structure according to claim 3, wherein the resistance member has an inner supporting portion that abuts on a vertical inner surface side of the frame of the outer wall panel. 6. The resistance member,
A plurality of protrusions provided on a surface of the outer wall panel facing the beam,
The outer wall panel mounting structure according to claim 1, further comprising: a plurality of protrusions provided on a surface of the beam facing the protrusions. The deformation amount at which the resistance member reaches the yield point is smaller than the deformation amount at which the mounting member for attaching the outer wall panel to the stud reaches the yield point. The method according to claim 1, wherein Exterior wall panel mounting structure.