JP4834889B2 - Intermediate floor curtain wall for base-isolated building - Google Patents

Description

  The present invention relates to a curtain wall constituting an outer wall of a building having a seismic isolation layer on an intermediate floor.

  Buildings with seismic isolation devices on the middle floor are structurally separated into upper and lower housings by the seismic isolation devices, so that the upper and lower housings can be displaced relative to each other in the horizontal direction. With a gap between them. Therefore, in this type of conventional base-isolated building, a water-proof material and a fire-resistant material are provided in the gap between the upper and lower housings around the entire outer wall to prevent intrusion of rainwater into the building and to prevent fire performance. (See Patent Documents 1 and 2).

On the other hand, the curtain wall not only greatly contributes to the reduction of the load on the housing, but also has many advantages such as rich design and excellent workability on site. It is the mainstream of the outer walls of high-rise buildings. In order to support the outer wall material constituting the curtain wall, a horizontal member called “nothing” and a vertical member called “standing” are often used.
JP-A-10-299128 JP-A-10-306620

  However, when a building with a curtain wall as an outer wall is renovated to a seismic isolation building with a seismic isolation device installed on the intermediate floor, there are the following problems.

  (1) When the seismic isolation device is installed on the intermediate floor, the position where the frame is structurally separated vertically by the seismic isolation device is in the middle of the floor where the seismic isolation device is installed. As for the outer wall material, it is preferable from the viewpoint of the behavior of the building at the time of the earthquake that the frame is separated at the same position as the separation position of the frame, that is, the displacement position of the building at the time of the earthquake. However, since a horizontal member is used to support the outer wall material, it is necessary to pay attention to the assignment of the outer wall material and to design so that the displacement position and the horizontal member coincide.

  (2) The outer wall material is not configured as a housing and is generally thin. Therefore, when the outer wall material is arranged with a gap in the vertical direction, it is difficult to provide the outer wall material with a structure for preventing rainwater from entering the building within the thickness range of the outer wall material.

  Accordingly, the present invention provides a curtain wall for an intermediate floor seismic isolation building that can separate the outer wall material up and down at an arbitrary position and that can ensure watertightness and airtightness between the separated outer wall materials. For the purpose.

  In order to achieve the above object, the curtain floor for seismic isolation of the intermediate floor according to the present invention is provided with a base isolation device on the intermediate floor, and has an opening on the outer periphery of the frame on the base isolation floor where the base isolation device is installed, and A curtain wall that constitutes the outer wall of a building that is structurally separated into a lower and upper frame on the seismic isolation floor, a lower lateral member that is directly or indirectly supported by the lower frame, and an upper layer An upper lateral member that is directly or indirectly supported and is arranged to face the lower lateral member with a gap, a lower outer wall material whose upper end is supported by the lower lateral member, and a lower end that is the upper side An upper outer wall member supported by the transverse member; and a seal member that seals a gap between the lower transverse member and the upper transverse member.

  Thus, the curtain wall is related to the frame structure of the building, etc. by providing the lower lateral member that supports the upper end portion of the lower outer wall member and the upper lateral member that supports the lower end portion of the upper outer wall member. And can be separated vertically at any position. In addition, a seal material is provided in the gap between the lower lateral member and the upper lateral member, thereby sealing the gap between the curtain walls separated vertically.

  The curtain wall of the present invention can be applied to any form such as a frame structure formed by a combination of a horizontal member and a vertical member and an outer wall material supported by the frame structure or a metal point construction method. In particular, by using the vertical member to support the lower lateral member or the upper lateral member, the degree of freedom of the vertical separation position of the curtain wall is improved. Furthermore, the lower cross-through member has a bowl-shaped portion on the upper surface along the longitudinal direction thereof, and a sealing material is disposed on both sides in the width direction of the bowl-shaped portion, so that the lower cross-through member is drained. A path can be formed.

  According to the present invention, the curtain wall can be separated vertically at an arbitrary position regardless of the frame structure. And since a sealing material can be provided in the isolate | separated position, sufficient water-tightness and airtightness can be ensured.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view of a plurality of floors including a base isolation floor of a building in which a curtain wall according to an embodiment of the present invention is installed. 2 is a longitudinal sectional view of the building shown in FIG. 1 at a plurality of floors including a seismic isolation floor, and FIG. 3 is an enlarged view of a main part of FIG.

  In the building of this embodiment, the outer wall is configured by a curtain wall 10. The curtain wall 10 includes a frame formed by arranging a plurality of vertical members 11c which are vertical members and a plurality of meshes 13 which are horizontal members in a grid pattern with respect to an outer wall surface, and each lattice of the frame. It basically has a plurality of outer wall members 14 arranged and supported by a frame.

  Moreover, the building of this embodiment is a building which has the opening part 2 over a part of outer periphery or the whole periphery of a housing, and the seismic isolation apparatus (not shown) was installed in the nth floor which is an intermediate floor. By this seismic isolation device, the building frame is structurally separated into the lower layer frame 1a and the upper layer frame 1b at the position including the opening 2 in the middle of the nth floor in the height direction. The lower layer frame 1a and the upper layer frame 1b are separated from each other. Relative displacement in the horizontal direction is possible. Along with this, the mesh 13 is fixed to the lower casing 1a or the upper casing 1b as a threading material extending in the lateral direction, but the vertical 11c is divided at the nth floor and arranged below the nth floor. A portion fixed to the lower casing 1a and a portion disposed on an upper layer than the nth floor and fixed to the upper casing 1b. In the present invention, the position separated into the lower layer casing 1a and the upper layer casing 1b is referred to as a casing separation position.

  On the n-th floor, the lower side passing member 12a and the upper side passing member 12b are arranged to face each other with a certain gap therebetween. The boundary portion between the lower lateral member 12a and the upper lateral member 12b, that is, the position in the floor height direction of the gap between them is set to be equal to the housing separation position.

  The lower transverse member 12a is supported by the upper end portion of the vertical 11a which is a vertical member supported by the lower casing 1a and extending upward. The vertical 11a is a member that is directly or indirectly supported by the lower frame 1a so as to be positioned on the same straight line as each vertical 11c in the nth floor, and whose upper end extends to the frame separation position. The upper lateral member 12b is supported by the lower end portion of the vertical 11b, which is a vertical member that is supported by the upper casing 1b and extends downward. This stand 11b is also a member that is directly or indirectly supported by the upper-layer casing 1b so as to be positioned on the same straight line as each stand 11c in the nth floor, and whose lower end extends to the casing separation position.

  With the above configuration, on the nth floor, the lower space surrounded by the seamless 13 on the lower housing 1a side, the lower lateral member 12a, and the two adjacent vertices 11a, and the upper housing side An upper space surrounded by the eyes 13, the upper lateral member 12b, and the two adjacent vertices 11b is formed. A lower outer wall member 15a is fixed to the lower space, and thereby the lower space is closed. The lower outer wall member 15a is fixed by supporting the upper and lower end edges of the lower outer wall member 15a on the lower transverse member 12a and the seamless member 13, respectively, or further supporting both side edges of the lower outer wall member 15a on the vertical 11a. Can be done. Similarly, the upper outer wall material 15b is fixed to the upper space, and thereby the lower space is closed. The upper outer wall member 15b is fixed by supporting the upper and lower end edges of the upper outer wall member 15b on the plain 13 and the upper lateral member 12b, respectively, or further supporting both side edges of the upper outer wall member 15b on the vertical 11b. Can do.

  As the lower outer wall member 15a and the upper outer wall member 15b, any member used as an outer wall member can be used. Examples of such an outer wall material include an outer wall material made of metal such as aluminum, steel, stainless steel, and titanium, an outer wall material made of glass, and an outer wall material made of precast concrete (PC). In order to unify the design of the entire curtain wall 10, the lower outer wall material 15 a and the upper outer wall material 15 b are preferably composed of the same members as the other outer wall materials 14.

  With the above configuration, the curtain wall 10 has a structure that is vertically separated with the frame separation position as a boundary. As described above, the lower lateral member 12a and the upper lateral member 12b face each other with a gap therebetween. is doing. For this reason, rainwater may enter the building from this gap. Therefore, in order to prevent rainwater from entering the building and to ensure airtightness between the inside and the outside of the building, a gap is formed between the lower lateral member 12a and the upper lateral member 12b. Three sealing materials 16a, 16b and 16c are provided for sealing the gap.

  Each of the sealing members 16a, 16b, and 16c is arranged along the direction in which the lower lateral member 12a and the upper lateral member 12b extend, and has a size sufficient to seal the gap between them. The three sealing materials 16a, 16b, and 16c are arranged in this order from the outside to the inside of the building. The two outer sealing materials 16a and 16b mainly function as a rain barrier, and the innermost sealing material 16c mainly functions as a wind barrier. The sealing materials 16a, 16b, and 16c may be fixed to the lower lateral member 12a or may be fixed to the upper lateral member 12b.

  In the portion between the sealing material 16b functioning as a rain barrier and the sealing material 16c functioning as a wind barrier of the lower lateral member 12a, the upper surface of the lower lateral member 12a is the longitudinal length of the lower lateral member 12a. It has a bowl-shaped part 121a along the direction, and constitutes a drainage path provided with drainage holes as necessary. That is, the sealing material 16b and the sealing material 16c are disposed on both sides in the width direction of the flange-shaped portion 121a of the lower lateral member 12a. As a result, even if rainwater passes through the sealing materials 16a and 16b, the rainwater that has passed flows into the drainage path before reaching the sealing material 16c, so that rainwater can be reliably prevented from entering the building. it can.

  As described above, according to the present embodiment, by providing the lower lateral member 12a that supports the upper edge of the lower outer wall member 15a and the upper lateral member 12b that supports the lower edge of the upper outer wall member 15b. Regardless of the structure of the frame or the position of the mesh 13, the upper and lower separation positions that serve as the displacement boundary portion at the time of the earthquake in the curtain wall 10 can be set. As a result, the boundary between the lower outer wall material 15a and the upper outer wall material 15b is not limited by the existing structure, especially when a non-base-isolated building is renovated to a base-isolated building with a base-isolated device on the intermediate floor. Can be matched with the housing separation position.

  Moreover, by providing the lower lateral member 12a and the upper lateral member 12b, the boundary position between the lower outer wall member 15a and the upper outer wall member 15b is set to an arbitrary position unrelated to the frame structure and the position of the invisible 13. However, the sealing materials 16a, 16b, and 16c can be provided in the gaps between the lower outer wall material 15a and the upper outer wall material 15b to ensure airtightness and watertightness.

  In the present embodiment, the opening 2 is provided in the portion facing the curtain wall 10, and the opening 2 can be used as a window. In this case, for example, the following configuration can be adopted.

  As shown in FIG. 3, the vertical reinforcing member 17 is attached to the lower end edge of the upper-layer casing 1 b through a hardware. The vertical reinforcing member 17 is a member that is located on the inner side of the building with respect to the upper outer wall member 15b and extends downward until the lower end reaches the upper lateral member 12b. A lower end portion of the vertical reinforcing member 17 is fixed to the upper lateral member 12b. Further, a frame 18 is attached to the upper end portion of the vertical reinforcing member 17, and an upper flange plate 18 b is attached to the lower end portion. The frame 18 is supported by the eyes 13. By providing the vertical reinforcing member 17, it is possible to firmly support the upper lateral member 12b to the upper-layer casing 1b. On the other hand, a lower collar 18a is attached to the upper edge of the lower casing 1a. The lower flange plate 18a is attached to the upper flange plate 18b so as to face the upper flange plate 18b with a gap. Further, the end portion of the lower collar plate 18a on the curtain wall 10 side is fixed to the lower lateral member 12a. The upper outer wall material 15b is made of a glass material.

  Here, the example in which the vertical reinforcing member 17 is added is shown, but the vertical reinforcing member 17 is not necessary if the supporting strength of the upper lateral member 12b to the upper-layer casing 1b is sufficient only by the vertical member 11b. . On the other hand, when the distance between the lower frame 1a and the lower lateral member 12a in the floor height direction is large and the support strength of the lower lateral member 12a by the vertical 11a is not sufficient, the same as the vertical reinforcing member 17 The lower casing 1a and the lower lateral member 12a may be connected by a reinforcing material (not shown) to reinforce the support strength of the lower lateral member 12a.

  Furthermore, in order to improve the fireproof performance of the building, a fireproof material 19 is provided as necessary. In the present embodiment, the refractory material 19 is provided between the lower casing 1a and the lower lateral member 12a in the floor height direction. However, when the opening is not used as a window, the upper casing 1b and the upper lateral passage are provided. You may provide between the members 12b.

  In addition, in this embodiment, the structure which provided the stand 11a supported by the lower layer housing 1a and the stand 11b supported by the upper layer housing 1b, and supported the lower side passage member 12a or the upper side passage member 12b in these. Although shown, depending on the position where the curtain wall 10 is separated vertically, it may have only one of the vertices 11a and 11b.

  Next, another embodiment of the present invention will be described.

  FIG. 4 is a front view of a plurality of floors including a base isolation floor of a building in which a curtain wall according to another embodiment of the present invention is installed. 5 is a longitudinal sectional view of the building shown in FIG. 4 at a plurality of floors including a seismic isolation floor, and FIG. 6 is an enlarged view of a main part of FIG.

  The curtain wall 20 of this embodiment is a glass curtain wall whose entire surface is made of glass, and adopts a metal point construction method as its construction method. The building itself is provided with a seismic isolation device (not shown) on the n-th floor, and is structurally separated into a lower-layer housing 1a and an upper-layer housing 1b with reference to the housing separation position. Further, the opening 2 is provided in a portion facing the curtain wall 20.

  The curtain wall 20 is configured in the same manner as a glass curtain wall by a general metal point construction method, except for the n-th floor portion where the seismic isolation device is installed. And metal points 23 arranged so as to commonly support the corners of the four outer wall members 24 adjacent to each other. The metal point 23 supports the outer wall member 24 by sandwiching the outer wall member 24 between the lower wall member 1a or the upper layer member 1b and the back surface support member 23b supported via the metal point support metal 23a.

  On the n-th floor, the curtain wall 20 has a lower lateral member 22a and an upper lateral member 22b. The lower side passing member 22a and the upper side passing member 22b are opposed to each other at a predetermined interval in the housing separating position, as in the above-described embodiment.

  The lower lateral member 22a is supported by a lower lateral member support hardware 29 attached to the upper end of the lower casing 1a. Here, the configuration in which the lower lateral member 22a is supported by the lower casing 1a via the lower casing plate 28a is shown, but the lower lateral member 22a may be directly supported by the lower casing 1a. The upper lateral member 22b is supported by a plurality of vertical members 21 attached to the upper casing 1b in the opening 2. The vertical member 21 is a member attached to the lower end portion of the upper-layer casing 1 b and extending downward, and the upper lateral member 22 b is supported by the lower end portion of the vertical member 21. Also in this embodiment, the opening 2 of the building is used as a window, and a frame 28 is attached to the upper end of the vertical member 21, and an upper gutter 28 b is attached to the lower end of the vertical member 21. It is attached with a certain distance from the lower collar plate 28a.

  In the nth floor, the curtain wall 20 has a lower outer wall member 25a and an upper outer wall member 25b made of glass, respectively. The vertical member 21 is positioned on the upper layer housing 1b side with respect to the upper outer wall member 25b and is not exposed to the outside of the building.

  The lower outer wall member 25a is arranged in parallel along the longitudinal direction of the lower lateral member 22a below the housing separation position, and both corners on the upper end side thereof are connected to the lower lateral member 22a. It is held by a lower metal point 24a that cooperates to sandwich the lower outer wall material 25a therebetween. The lower metal point 24a corresponds to the boundary between two adjacent lower outer wall members 25a so that the corners of the two adjacent lower outer wall members 25a can be fixed by one lower metal point 24a. In position, it is attached to the lower transverse member 22a. A corner on the lower end side of the lower outer wall member 25a is held by a metal point 23 similar to a normal one.

  The upper outer wall member 25b is arranged in parallel along the longitudinal direction of the upper lateral member 22b above the housing separation position, and both corners on the lower end side cooperate with the upper lateral member 22b. Are held by an upper metal point 24b that sandwiches the upper outer wall member 25b therebetween. The upper metal point 24b is located on the upper side at a position corresponding to the boundary between the two adjacent upper outer wall members 25b so that the corners of the two adjacent upper outer wall members 25b can be fixed by one upper metal point 24b. It is attached to the threading member 22b. The corner on the upper end side of the upper outer wall member 25b is held by the same metal point 23 as usual.

  Here, the curtain wall 20 by the metal point construction method is shown, but a curtain wall by the dot point construction method can also be used. In this case, through holes are formed at the four corners of the lower outer wall member 25a and the upper outer wall member 25b, and a bolt-shaped hardware (not shown) is passed through the lower hole member 22a or upper member 22b. By attaching to, the lower outer wall material 25a and the upper outer wall material 25b are supported. Furthermore, a rib glass or a tension wire can be used as a support member, thereby supporting the lower outer wall member 25a and the upper outer wall member 25b.

  With the above configuration, the curtain wall 20 has a structure that is vertically separated with the frame separation position as a boundary, and the lower side, the pressing member 22a, and the upper lateral member 22b face each other with a gap therebetween. . Sealing materials 26a, 26b, and 26c are provided in the gap as in the above-described embodiment. Further, between the sealing material 26b functioning as a rain barrier and the sealing material 26c functioning as a window barrier, the lower lateral member 22a has a drainage path formed with a bowl-shaped portion on the upper surface thereof. This is also the same as the above-described embodiment.

  Also in the present embodiment, the upper and lower separation positions of the curtain wall 20 can be set at arbitrary positions, as in the above-described embodiments, and there is a limitation due to the existing structure even when refurbishing to a seismic isolation building. Without receiving, the boundary between the lower outer wall member 25a and the upper outer wall member 25b can be matched with the housing separation position. In addition, by providing the lower lateral member 22a and the upper lateral member 22b, the lower outer wall member 25a and the upper outer wall member can be placed at any boundary position between the lower outer wall member 25a and the upper outer wall member 25b. Sealing materials 26a, 26b, and 26c are provided in the gaps between the two and 25b, and airtightness and watertightness can be ensured.

  In this embodiment, the building enclosure has a rising portion extending from the floor slab toward the ceiling. However, when there is no rising portion or the height of the rising portion is low, the lower case enclosure is provided. A vertical member (not shown) supported by 1a and extending upward may be further provided, and the lower transverse member 22a may be supported on the upper end portion of the vertical member. Conversely, if the vertical separation position of the curtain wall 20 is in the vicinity of the lower end of the upper casing 1b, the upper lateral member 22b is supported by the upper casing 1b without using the vertical member 21 supported by the upper casing 1b. And it is good also as a structure which supported the lower side penetration member 22a to the vertical member supported by the lower layer housing 1a and extended upwards.

  Further, in each of the above-described embodiments, the example in which the boundary between the lower outer wall material and the upper outer wall material is matched with the housing separation position is shown, but the boundary between the lower outer wall material and the upper outer wall material is not limited thereto. As long as it is within the range of the seismic isolation floor provided with the seismic isolation device, it may be located anywhere.

It is a front view of a plurality of floors including a base isolation floor of a building in which a curtain wall according to an embodiment of the present invention is installed. It is a longitudinal cross-sectional view in the some floor containing a base isolation floor of the building shown in FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a front view of a plurality of floors including a base isolation floor of a building in which a curtain wall according to another embodiment of the present invention is installed. It is a longitudinal cross-sectional view in the some floor containing a base isolation floor of the building shown in FIG. It is a principal part enlarged view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a Lower layer housing 1b Upper layer housing 2 Opening 10, 20 Curtain wall 11a, 11b, 11c Standing 12a, 22a Lower lateral member 12b, 22b Upper lateral member 15a, 25a Lower outer wall material 15b, 25b Upper outer wall material 16a -16c, 26a-26c Sealing material 17 Vertical reinforcing material 19 Refractory material 21 Vertical member 24a Lower metal point 24b Upper metal point 121a Saddle-shaped part

Claims (6)

A seismic isolation device is installed on the intermediate floor, the seismic isolation floor has the opening on the outer periphery of the housing, and is structurally separated into a lower and upper housing on the seismic isolation floor. Curtain wall constituting the outer wall of the building,
A lower lateral member directly or indirectly supported by the lower housing;
An upper lateral member that is directly or indirectly supported by the upper housing and is disposed to face the lower lateral member with a gap;
A lower outer wall material having an upper end supported by the lower lateral member;
An upper outer wall material having a lower end supported by the upper lateral member;
A sealing material that seals a gap between the lower lateral member and the upper lateral member;
Curtain wall.   In the case of having at least one of a vertical member supported by the lower layer casing and extending upward and a vertical member supported by the upper layer casing and extending downward, and having a vertical member supported by the lower layer casing, 2. The curtain wall according to claim 1, wherein, when the upper lateral member is supported by the upper end portion and the vertical member is supported by the upper casing, the upper lateral member is supported by the lower end portion thereof. .   The curtain wall according to claim 2, wherein the vertical member is vertical.   The lower lateral member is provided with a support member that supports the upper end portion of the lower outer wall member in cooperation with the lower lateral member, and the upper lateral member includes the upper lateral member. The curtain wall according to claim 2, further comprising a support member that supports the lower end portion of the upper outer wall member in cooperation with the upper wall material.   5. The curtain according to claim 4, wherein the lower support member and the upper support member are metal points, and the vertical member is located closer to the housing side of the building than the lower outer wall member and the upper outer wall member. Wall.   The lower side through member according to any one of claims 1 to 5, wherein the upper side member has a hook-shaped portion along the longitudinal direction on the upper surface, and the sealing material is disposed on both sides in the width direction of the hook-shaped portion. The curtain wall described.

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