Fire-resistant structures, panel materials, and fire-resistant structure construction methods

Abstract

The present invention provides a fire-resistant structure that suppresses heat conduction between beams and floor board members, a panel material that realizes the fire-resistant structure, and a construction method for the fire-resistant structure. [Solution] The fire-resistant structure 100 comprises a beam 1, a frame material 7 supported on the upper surface of the beam 1, a flat plate member 3 supported on the upper surface of the frame material 7, and a filler material 6 filled in the space within the frame of the frame material 7, wherein the frame material 7 is formed from an inorganic material, the filler material 6 is also formed from an inorganic material, and the beam 1 and the plate member 3 are spaced apart.

Description

[Technical Field]

[0001] The present disclosure relates to a fire-resistant structure, a panel material, and a method for constructing a fire-resistant structure. [Background technology]

[0002] Patent Document 1 discloses a floor structure in which a composite floor slab consisting of a reinforced concrete floor section and wooden floorboards located below it is placed on steel beams, and the steel beams are covered with a fire-resistant covering material. In this floor structure, temporary support members are provided on the upper surfaces of the steel beams to temporarily support the wooden floorboards in a non-contact or nearly non-contact state with the steel beams, and the upper surfaces of the steel beams on which the temporary support members are provided are covered with a concrete layer of the reinforced concrete floor section, and the outer surfaces of the beams other than the upper surfaces of the steel beams are covered with a fire-resistant covering material.

[0003] Patent Document 2 discloses a fire-resistant structure, a fire-resistant panel, and a method for constructing a fire-resistant structure. This fire-resistant structure includes beam members having flanges and arranged at predetermined intervals in one direction, a load-bearing layer formed by arranging the sides of a plurality of wooden pieces adjacent to each other, a fire-resistant panel having a first non-combustible layer made of a non-combustible material arranged on one side of the load-bearing layer and a second non-combustible layer made of a non-combustible material arranged on the other side of the load-bearing layer, and a beam fixing member that penetrates from the flange to the fire-resistant panel and is screwed to a predetermined position on the load-bearing layer with the first non-combustible layer placed on the flange of the beam member as the installation surface.

[0004] Patent Document 3 discloses a floor beam connection structure. This floor beam connection structure has thermally conductive flooring, combustible beams that support the flooring, and a connection part that connects the flooring and the beams. The beams have fire-resistant material on the sides and fire-resistant material on the underside. The connection part is provided so as to contact the flooring and the upper end of the fire-resistant material, and has a heat conduction reducing member that reduces heat conduction from the flooring to the beams. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2020-105697 [Patent Document 2] Japanese Patent Publication No. 2022-21793 [Patent Document 3] Japanese Patent Application Publication No. 2023-149696 Summary of the Invention [Problem to be solved by the invention]

[0006] As disclosed in Patent Documents 1 to 3, in structures such as floor structures, fire-resistant structures, and floor beam connection structures, wood or thermally conductive materials may be used as the plate members forming the floor. These plate members are supported by the beams while abutting the upper surfaces of the beams. Therefore, conventional connection structures between beams and floor board members do not sufficiently suppress heat conduction between the beams and the plate members. However, if the heat conduction between the beams and the plate members in a connection structure between a beam and a floor board member can be sufficiently suppressed, it is believed that the connection structure can be made fire-resistant. Therefore, it is desirable to provide a fire-resistant structure that suppresses heat conduction between the beams and the floor board members, as well as a panel material and a construction method for a fire-resistant structure that realizes such a fire-resistant structure.

[0007] The present disclosure has been made in consideration of such circumstances, and its purpose is to provide a fire-resistant structure that suppresses heat conduction between beams and floor board members, a panel material that realizes the fire-resistant structure, and a construction method for the fire-resistant structure. [Means for solving the problem]

[0008] The fire-resistant structure according to the present disclosure for achieving the above object comprises: Beams and A frame material supported on the upper surface of the beam; a flat plate member supported on an upper surface of the frame material; a filler material filled in a space within the frame of the frame material, The frame material is formed of an inorganic material, the filler is formed of an inorganic material, The beam and the plate member are spaced apart.

[0009] In the fire-resistant structure according to the present disclosure, the plate member has a first through-hole formed to penetrate through the plate surface; the frame member has a portion formed in a ring shape in a top view, The first through hole may overlap with the inside of the ring of the frame material in a top view.

[0010] In the fire-resistant structure according to the present disclosure, an extension member fixed to the beam and extending upward from the beam; the first through hole is disposed at an end of the plate surface of the plate member, The extension member is inserted into the first through hole, The metal may be embedded in the filler.

[0011] In the fire-resistant structure according to the present disclosure, The frame material may be a fire-resistant cladding plate.

[0012] In the fire-resistant structure according to the present disclosure, The frame material may be made of lightweight aerated concrete.

[0013] In the fire-resistant structure according to the present disclosure, the frame member has a second through hole formed along the extension direction of the first through hole, the first through hole and the second through hole overlap in a top view, The filler may be filled in the first through hole and the second through hole.

[0014] In the fire-resistant structure according to the present disclosure, the plate member has a recess formed on a lower surface thereof, The frame member may be fitted into the recess.

[0015] In the fire-resistant structure according to the present disclosure, Further provided is a fireproof covering plate covering the side surface of the beam, The frame material extends to the outside of the beam in a top view, The upper end surface of the fire-resistant covering plate may be in contact with the lower surface of the frame material.

[0016] In order to achieve the above object, the panel material according to the present disclosure comprises: a plate member having a recess formed on its underside; a frame member fitted into the recess, the plate member has a first through-hole formed to penetrate through the plate surface; The frame material is It is a slab made of lightweight aerated concrete, a second through hole formed along the extending direction of the first through hole; The first through hole and the second through hole overlap each other in a top view.

[0017] In order to achieve the above object, the construction method of the fire-resistant structure according to the present disclosure includes: The construction method for the fire-resistant structure described above, placing the frame material on an upper surface of the beam; placing the plate member on an upper surface of the frame member with the beam and the plate member spaced apart; and filling the filler material into the frame of the frame material. [Effects of the Invention]

[0018] According to the present disclosure, it is possible to provide a fire-resistant structure that suppresses heat conduction between beams and floor board members, a panel material that realizes the fire-resistant structure, and a construction method for the fire-resistant structure. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 2 is a view of the fire-resistant structure according to the present embodiment as seen from above. [Figure 2] FIG. 2 is a cross-sectional view of the fireproof structure according to the present embodiment as seen from the side. [Figure 3] FIG. 2 is a top view showing an example of a floor portion of a building including a fire-resistant structure according to the present embodiment. [Figure 4]FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3. [Figure 5] FIG. 10 is a view of the frame material from above. [Figure 6] FIG. 10 is a side view of the frame material. [Figure 7] FIG. 2 is an explanatory diagram showing an example of the arrangement of fire-resistant covering materials. [Figure 8] FIG. 10 is a top view of the fire-resistant structure according to the first modification of the present embodiment. [Figure 9] FIG. 10 is a cross-sectional side view of a fire-resistant structure according to a first modified example of the present embodiment. [Figure 10] FIG. 10 is a view of a frame material in Modification 1 as seen from above. [Figure 11] FIG. 10 is a cross-sectional view of a fire-resistant structure according to a second modification of the present embodiment, as viewed from above. [Figure 12] FIG. 10 is a cross-sectional side view of a fire-resistant structure according to a second modification of the present embodiment. [Figure 13] FIG. 10 is a side view of a plate member according to a second modified example of the present embodiment. [Figure 14] FIG. 10 is a top view of a fire-resistant structure according to a third modification of the present embodiment. [Figure 15] FIG. 10 is a cross-sectional side view of a fire-resistant structure according to a third modification of the present embodiment. [Figure 16] FIG. 10 is a top view of a frame material in Modification 3. [Figure 17] FIG. 1 is a side view of the panel material. [Figure 18] FIG. 10 is a side view of another panel material. [Figure 19] FIG. 2 is an explanatory diagram showing an example of a method for fixing a fire-resistant covering material. [Figure 20] FIG. 10 is an explanatory diagram showing another example of the arrangement of frame materials. [Figure 21] FIG. 10 is a top view of another fire-resistant structure. [Figure 22] FIG. 10 is a cross-sectional side view of another fire-resistant structure. [Figure 23] FIG. 10 is a top view of another frame material. [Figure 24] FIG. 10 is a top view of another fire-resistant structure. [Figure 25] FIG. 10 is a cross-sectional side view of another fire-resistant structure. [Figure 26] FIG. 10 is an explanatory diagram of a case where a frame material is fixed with a fixing tool. [Figure 27] FIG. 10 is an explanatory diagram of a case where a frame material is fixed with a fixing tool. [Figure 28] 10 is an explanatory diagram of another frame material and another second through hole. FIG. [Figure 29] 10 is an explanatory diagram of another frame material and another second through hole. FIG. [Figure 30] FIG. 10 is an explanatory view of another case where a filler is filled into a second through hole. [Figure 31] 10 is an explanatory diagram of another frame material and another second through hole. FIG. [Figure 32] 10 is an explanatory diagram of another frame material and another second through hole. FIG. [Figure 33] FIG. 10 is a cross-sectional side view of another fire-resistant structure. [Figure 34] FIG. 10 is an explanatory view of another second through hole. [Figure 35] FIG. 10 is an explanatory view of another second through hole. [Figure 36] FIG. 10 is an explanatory view of another case where a filler is filled into a second through hole. [Figure 37] FIG. 10 is a side view of another frame material. [Figure 38] FIG. 10 is a top view of another frame material. [Figure 39] FIG. 10 is a side view of another frame material. [Figure 40] FIG. 10 is a top view of another frame material. DETAILED DESCRIPTION OF THE INVENTION

[0020] A fire-resistant structure, a panel material, and a method for constructing a fire-resistant structure according to an embodiment of the present disclosure will be described based on the drawings.

[0021] Fig. 1 shows a view (top view) of a fire-resistant structure 100 according to this embodiment as seen from above. Fig. 2 shows a cross-sectional view of the fire-resistant structure 100 as seen from the side (horizontally). Fig. 2 is a cross-sectional view taken along the line II-II in Fig. 1. First, an overview of the fire-resistant structure 100 will be described.

[0022] As shown in Figures 1 and 2, the fire-resistant structure 100 comprises a beam 1, a frame material 7 supported on the upper surface of the beam 1, a flat plate member 3 supported on the upper surface of the frame material 7, and a filler material 6 filled in the space within the frame of the frame material 7, wherein the frame material 7 is formed of an inorganic material, the filler material 6 is also formed of an inorganic material, and the beam 1 and the plate member 3 are spaced apart.

[0023] In the fire-resistant structure 100, in the connection structure between the beams 1 and the plate members 3 that form the floor, heat conduction between the beams 1 and the plate members 3 can be suppressed.

[0024] The fire-resistant structure 100 will be described in detail below.

[0025] Hereinafter, the top, upper, or upper side in the vertical direction will be simply referred to as top, upper, or upper side, and the bottom, bottom, or lower side in the vertical direction will be simply referred to as bottom, lower, or lower side, etc. Hereinafter, the direction perpendicular to the vertical direction will be simply referred to as the horizontal direction.

[0026] The fire-resistant structure 100 is part of the structure of a building such as a house or a building. An example of a building is a steel-framed building. The building may be composed of a reinforced concrete foundation, a framework made up of framework members such as columns and beams, and a superstructure fixed to the foundation, which has plate-like members (so-called panels) that form walls, floors, etc. The framework members and panels may be standardized in advance. In this case, the framework members and panels can be manufactured in advance in a factory and transported to the construction site, where the building can be assembled.

[0027] As shown in FIGS. 1 and 2 , the fire-resistant structure 100 includes a beam 1, a frame member 7, a plate member 3, and a filler material 6 that fills the space within the frame of the frame member 7. The fire-resistant structure 100 is one form of a connection structure that connects the beam 1 and the plate member 3. In addition to the beam 1, the frame member 7, the plate member 3, and the filler material 6, the fire-resistant structure 100 may further include an extension member 2 that is fixed to the beam 1 and extends upward from the beam 1, a fire-resistant covering plate 8 that covers the side and bottom surface of the beam 1, and a fire-resistant covering plate 38 that covers the bottom surface of the plate member 3.

[0028] As shown in Figures 1 and 2, the fire-resistant structure 100 has a structure in which a beam 1, a frame member 7, and a plate member 3 are stacked in this order from bottom to top, and the plate member 3 is supported on the beam 1 via the frame member 7. A plurality of plate members 3 may be supported on one beam 1. Figures 1 and 2 illustrate an example in which a plate member 3A, which is one plate member 3, and a plate member 3B, which is the other plate member 3, are supported on the beam 1 with their end portions 30, 30 facing each other.

[0029] FIG. 3 shows an example of a floor A of a building configured to include a fire-resistant structure 100. FIG. 3 is a view (top view) of the floor A seen from above. FIG. 3 illustrates an example in which the floor A is constructed using six plate members 3. FIG. 4 shows a cross-sectional view taken along the line IV-IV shown in FIG. 3.

[0030] As shown in FIGS. 1 to 4, a beam 1 is a skeletal member of a building and is a long member. The beam 1 is arranged horizontally. The beam 1 is, for example, an H-shaped steel beam, a channel steel beam, a wooden material (wooden beam), or a columnar member made of reinforced concrete (RC beam). As an example, this embodiment describes a case where the beam 1 is a so-called S-beam, that is, an H-shaped steel beam having a web 11 and a pair of flanges 12, 13, as shown in FIG. 2.

[0031] 2 illustrates an example in which the beam 1 is arranged with the plate surface of the web 11 aligned vertically and the plate surfaces of the flanges 12 and 13 aligned horizontally. In the example of FIG. 2, the flange 12 is arranged above the flange 13 in the vertical direction.

[0032] The beam 1 may have its ends supported by pillars 9, for example, as shown in Fig. 3. Fig. 3 shows the case where the beam 1 is arranged so as to span a pair of pillars 9, 9.

[0033] 1 and 2, the extension member 2 is fixed to the upper surface of a rod-shaped beam 1 so as to extend upward from the upper surface of the beam 1. FIGS. 1 and 2 show an example in which the extension member 2 is fixed to the upper surface of the flange 12 of the beam 1.

[0034] As will be described later, the extension member 2 may be inserted into the first through-hole 4 of the plate member 3. The extension member 2 is also embedded in the filler material 6.

[0035] Examples of the extension member 2 are rod-shaped members and plate-shaped members. For example, the cross section of the extension member 2 intersecting the extension direction of the extension member 2 may be circular, polygonal such as rectangular, or X-shaped. The extension direction of the extension member 2 may be a direction along the vertical direction, and as an example, is parallel to the vertical direction.

[0036] The top of the extension member 2 may be provided with a plate-shaped, for example, disk-shaped or polygonal, such as a hexagonal, head whose plate surface intersects the extension direction of the extension member 2. When the extension member 2 is rod-shaped, the extension member 2 may be, for example, a steel rod, more specifically, a headless stud or a headed stud. The extension member 2 may also be a bolt, screw, or screw that is inserted from the underside of the flange 12 of the beam 1, penetrates the flange 12, and is fixed so as to extend to the upper side.

[0037] The extension members 2 may be arranged on the upper surface of the beam 1, for example, at regular intervals.

[0038] As shown in Figures 1 to 4, the plate member 3 is a flat member (panel) that forms the floor or R-floor of a building. As shown in Figure 2, the plate member 3 is supported on the plate surface of the flange 12 of the beam 1 via a frame member 7, for example. In other words, the plate member 3 is supported on the upper surface of the frame member 7 that is supported on the upper surface of the beam 1, and is spaced apart from the beam 1. In this embodiment, the normal direction to the plate surface of the plate member 3 is parallel to the vertical direction. In other words, the normal direction to the plate surface is the thickness direction of the plate member 3. Details of the frame member 7 will be described later.

[0039] Figures 1 and 2 illustrate an example of a fire-resistant structure 100 in which plate member 3A as plate member 3 is supported on the upper surface of one end of flange 12 in a direction intersecting the extension direction of beam 1 (hereinafter referred to as the width direction of beam 1), and plate member 3B (a plate member 3 different from plate member 3A) as plate member 3 is supported on the upper surface of the other end of flange 12.

[0040] 3 and 4, in the fire-resistant structure 100, the plate member 3 may be supported only on the upper surface of one end of the flange 12 in the width direction of the beam 1. Also, the plate member 3 may be supported only on the upper surface of the other end of the flange 12.

[0041] An example of the board member 3 shown in Figs. 1 and 2 is a wooden panel. In this embodiment, the board member 3 is illustrated as being cross-laminated timber (so-called CLT: Cross Laminated Timber). The board member 3 is attached by being placed on the beam 1, for example. The board member 3 is arranged so that the board surface is aligned horizontally. When the board member 3 is a wooden panel, in addition to cross-laminated timber, laminated veneer lumber (LVL: Laminated Veneer Lumber), engineered wood, etc. can also be used.

[0042] As shown in Figures 1 and 2, the plate member 3 may have a first through hole 4 formed therein that penetrates its plate surface. When the first through hole 4 is formed in the plate member 3, the first through hole 4 is formed in a direction perpendicular to the plate surface of the plate member 3. In this embodiment, when the plate member 3 is placed on the frame member 7, the axis of the first through hole 4 is aligned with the vertical direction. In other words, the first through hole 4 is formed so that when the plate member 3 is placed on the frame member 7, the extension direction of the first through hole 4 is aligned with the vertical direction.

[0043] The first through hole 4 may be disposed at an edge 30 of the plate surface of the plate member 3. The edge 30 refers to the outer periphery of the plate member 3 when viewed from above (when viewed along the normal direction of the plate surface of the plate member 3). The shortest distance between the periphery of the first through hole 4 and the end face of the edge 30 is preferably 20 mm or more.

[0044] 1 and 3, a plurality of first through holes 4 may be formed at an end 30, which is one side of the plate member 3. The first through holes 4 may be arranged at the end 30 of the plate member 3 that is supported by the beam 1. In FIG. 3, the first through holes 4 are arranged in a row at the end 30 of the plate member 3 that forms the outer periphery of the floor portion A.

[0045] As shown in Figures 1 and 2, the first through hole 4 may be formed in a straight cylindrical shape. Although not shown, the diameter of the first through hole 4 may be partially expanded. As an example, the first through hole 4 may have a circular cross section intersecting the vertical direction, i.e., a circular shape when viewed from above. The first through hole 4 may also have a rectangular cross section.

[0046] The center-to-center distance between adjacent first through holes 4, 4 arranged on the same end 30 is, for example, 100 mm to 400 mm.

[0047] As will be described later, the first through hole 4 is arranged so as to overlap with an opening portion (second through hole 74 in this embodiment) which is the space within the frame of the frame material 7 when viewed from above when the plate member 3 is placed on the frame material 7. When the frame material 7 is formed in a ring shape as will be described later, it is preferable that the first through hole 4 overlap with the inside of the ring formed by the frame material 7 when viewed from above.

[0048] In this embodiment, "annular" refers to a shape that defines a closed area, and includes a circular shape, a rectangular shape, and other polygonal shapes. In addition, in this embodiment, "frame" refers to something that surrounds something with a border, such as a through-hole or a frame-shaped member that is rectangular or circular in top view, and has an annular wall portion in top view.

[0049] When the fire-resistant structure 100 includes an extension member 2 on the beam 1, the first through hole 4 is positioned so as to overlap the extension member 2 in a top view. In this case, the extension member 2 may be inserted into the first through hole 4. That is, the plate member 3 may be placed on the beam 1 with the extension member 2 inserted into the first through hole 4.

[0050] It is preferable that the axial direction of the extension member 2 is aligned with the axial direction of the first through hole 4. It is preferable that the axial center of the extension member 2 and the axial center of the first through hole 4 are arranged to overlap, but the respective axial centers may be offset from each other.

[0051] As shown in Figures 1 and 2, the frame member 7 is a member that supports the plate member 3 on its upper surface while being supported on the upper surface of the beam 1. The frame member 7 also serves to separate the beam 1 from the plate member 3. Figures 1 and 2 illustrate an example in which one frame member 7 supports adjacent plate members 3, 3 with their end portions 30, 30 facing each other, i.e., the end portion 30 of one plate member 3, plate member 3A, and the end portion 30 of the other plate member 3, plate member 3B.

[0052] The frame material 7 is made of an inorganic material. The frame material 7 made of an inorganic material separates the beam 1 and the plate member 3, thereby suppressing heat conduction between the beam 1 and the plate member 3 in the fire-resistant structure 100. In this embodiment, the frame material 7 is placed on the upper surface of the flange 12 and is supported by the beam 1. The frame material 7 may support the end 30 of the plate member 3.

[0053] As shown in Fig. 5, the frame material 7 may be formed in the shape of a rectangular plate when viewed from above. As shown in Figs. 1 and 2, the frame material 7 may be placed on the beam 1 with its longitudinal direction aligned with the extension direction of the beam 1.

[0054] 1 and 2, the frame material 7 may be arranged with its plate surface aligned with the plate surface of the plate member 3. FIG. 2 illustrates an example in which the frame material 7 is arranged along the underside of the plate member 3, and the frame material 7 is arranged between the flange 12 of the beam 1 and the plate member 3.

[0055] The frame material 7 may be positioned only within the range overlapping with the flange 12 of the beam 1 in a top view, i.e., in the normal direction of the plate surface of the plate member 3. In other words, the frame material 7 may be positioned so as not to extend beyond the flange 12 of the beam 1 in a top view. This may facilitate the formation of a protrusion (a three-dimensional obstacle that interferes with the fire-resistant covering plate 81) when fire-resistant covering is performed on the beam 1 or the plate member 3 using a fire-resistant covering plate 81 (a fire-resistant covering plate 8 covering the side surface of the beam 1), as described below. Figure 2 shows a case where the side surface of the frame material 7 (the side surface facing the plate member 3) and the end surface of the side of the beam 1 (the end surfaces of the flanges 12 and 13) are flush with each other.

[0056] The frame material 7 is made of an inorganic material that has a lower thermal conductivity than the material that forms the beam 1. This allows the fire-resistant structure 100 to better suppress heat conduction between the beam 1 and the plate members 3.

[0057] For example, even if a fire breaks out in the space below the beam 1, the frame material 7 made of inorganic material will not burn and will keep the plate members 3 separated from the beam 1, while suppressing heat conduction from the beam 1, thereby maintaining the fire resistance of the fire-resistant structure 100. More specifically, when the temperature of the beam 1 rises due to a fire or the like, the frame material 7 may be able to delay the temperature rise of the plate members 3, which may have the effect of improving the fire resistance of the building. The effect of improving fire resistance is particularly noticeable when the plate members 3 are made of wood materials such as CLT.

[0058] As an example of inorganic materials, the frame material 7 may be formed from a fire-resistant covering board such as gypsum board or lightweight aerated concrete (ALC), for example, an aerated concrete board (ALC board) or an aerated concrete block (ALC block). Since ALC such as ALC boards and ALC blocks is a lightweight concrete material, the frame material 7 can be made lightweight by forming it from ALC such as ALC boards or ALC blocks. If the frame material 7 is lightweight, it will be easier to install the frame material 7 on the beams 1 and to position it on the beams 1. This will also contribute to reducing the weight of the entire building.

[0059] Furthermore, ALC is strong against vertical loads among inorganic materials with low thermal conductivity (which inhibits thermal conduction), and therefore, it may be possible to make the fire-resistant structure 100 strong as a connecting structure.

[0060] When the frame material 7 is made of an ALC board, it is preferable to use an ALC board with internal reinforcing bars. The ALC board has reinforcing bars, which increases the compressive strength of the frame material 7. This also prevents the strength of the frame material 7 from being reduced by forming the second through holes 74, allowing the frame material 7 (ALC board) to maintain its shape for a long period of time. This also prevents damage to the frame material 7 (for example, crumbling) when the frame material 7 is installed on the beam 1.

[0061] When the frame material 7 is made of ALC boards, wire mesh or reinforcing bars may be used as reinforcing bars. When wire mesh or reinforcing bars are used as reinforcing bars, the reinforcing bars may be used in one layer or multiple layers (for example, two layers) in the thickness direction (vertical direction) of the frame material 7. It is preferable to use two layers of reinforcing bars.

[0062] When the frame material 7 is made of ALC board and has two layers of reinforcing bars, the upper reinforcing bars contribute to reducing the risk of damage to the frame material 7 (ALC board) when the plate member 3 is placed on the frame material 7. The lower reinforcing bars contribute to making the frame material 7 (ALC board) less likely to break in the vertical direction.

[0063] When the frame material 7 is made of ALC board and has one layer of reinforcing bars, the reinforcing bars should be arranged in the center of the frame material 7 in the thickness direction.

[0064] When the frame material 7 is made of an ALC plate, the thickness of the frame material 7 (ALC plate) is sufficient if it is 30 mm or more and 60 mm or less, and may be, for example, a plate having a thickness of 37 mm or 50 mm.

[0065] When the frame material 7 is made of ALC blocks, ALC blocks having internal reinforcing bars may be used, as in the case of ALC plates. The presence of reinforcing bars in the ALC blocks increases the compressive strength of the frame material 7, as in the case of ALC plates.

[0066] The frame material 7 may have a portion formed in an annular shape in a top view. That is, as shown in FIGS. 1, 5, and 6, the frame material 7 may be, for example, a flat member having a rectangular shape in a top view and having one or more second through holes 74 formed therein. In this embodiment, six second through holes 74 are formed in the frame material 7, and the space within each hole is the space within the frame material 7. In addition, the outer portion of the periphery of the second through holes 74 in the frame material 7 is the portion of the frame material 7 formed in an annular shape in a top view. In the example shown in FIGS. 5 and 6, the frame material 7 has two rows of second through holes 74 formed in the short direction of the frame material 7 in a top view, with three second through holes per row along the long direction.

[0067] Specifically, the frame material 7 may be, for example, a plate-shaped member made of lightweight aerated concrete (ALC plate) with one or more second through holes 74 formed through the plate surface, i.e., along the extension direction of the first through hole 4.

[0068] The second through hole 74 may be straight or may have a partially enlarged diameter. For example, the second through hole 74 may have a circular cross section intersecting the vertical direction, i.e., a circular shape when viewed from above. The second through hole 74 may also be rectangular when viewed from above.

[0069] As shown in FIG. 2, the second through hole 74 may be arranged so as to overlap with the first through hole 4 in a top view when the frame material 7 is disposed between the beam 1 and the plate member 3. That is, the second through hole 74 may be arranged so as to overlap with the first through hole 4 in a top view. The second through hole 74 and the first through hole 4 may have substantially the same shape in a top view. In this embodiment, the second through hole 74 and the first through hole 4 are circular and have the same diameter, and their centers overlap in a top view. The second through hole 74 and the first through hole 4 are in a state of communication by overlapping in a top view.

[0070] The extension member 2 may be inserted into the second through-hole 74. In this case, the extension member 2 may be inserted through the second through-hole 74 and into the first through-hole 4.

[0071] The space within the frame of the frame material 7 is filled with a filler material 6. The filler material 6, together with the frame material 7, separates the plate member 3 from the beam 1, and contributes to suppressing heat conduction between the beam 1 and the plate member 3 (particularly, heat conduction from the top surface of the beam 1 to the plate member 3).

[0072] When the frame material 7 has second through holes 74 that form spaces within the frame, the second through holes 74 are filled with the filler material 6 .

[0073] In this embodiment, as shown in Figures 2 and 7, the filler 6 is filled into the second through hole 74 and the first through hole 4. The filler 6 extends from the inside of the second through hole 74 to the inside of the first through hole 4, forming an integrated filling layer. This makes the fire-resistant structure 100 a strong connection structure. In this way, according to this embodiment, a fire-resistant structure that suppresses heat conduction between the beam 1 and the plate member 3 is realized, and a connection structure that firmly joins the beam 1 and the plate member 3 can also be realized.

[0074] The filler 6 is primarily composed of inorganic materials, such as grout, non-shrink mortar (a mixture of cement, water, fine aggregate, and admixtures), or concrete (a mixture of cement, water, fine aggregate, coarse aggregate, and admixtures). Among these, non-shrink mortar is particularly suitable as the filler 6. This is because non-shrink mortar has little drying shrinkage and is less likely to create gaps in the filled area of ​​the first through hole 4. If gaps form in the filled area of ​​the through hole 4, initial deformation when a load is applied to the fire-resistant structure 100 increases. However, this can sometimes be prevented by using non-shrink mortar as the filler 6. Furthermore, because non-shrink mortar uses only fine aggregate as the aggregate, it has better filling properties when filling the first through hole 4 than concrete. Furthermore, because non-shrink mortar is a non-combustible material, it has advantages in terms of fire resistance and fire resistance compared to resin-based fillers.

[0075] The extension member 2 is preferably embedded in the filler material 6. In this way, the plate member 3 is fixed to the beam 1 via the extension member 2 and the filler material 6.

[0076] The fire-resistant covering boards 8 and 38 shown in Figures 2 and 7 are plate-shaped covering materials made of fire-resistant materials. Specific examples of the fire-resistant covering boards 8 and 38 are plate-shaped materials (board materials) such as gypsum boards and calcium silicate boards.

[0077] The fire-resistant covering plate 8 is a plate-shaped covering material that covers the beam 1. The fire-resistant covering plate 8 may include fire-resistant covering plates 81, 81 that cover the side surfaces of the beam 1, and a fire-resistant covering plate 82 that covers the underside of the beam 1 (the underside of the flange 13). The fire-resistant covering plate 8 may be fixed to the beam 1 with screws or bolts, for example, to cover the beam 1. In particular, the fire-resistant covering plate 81 may be fixed to stiffeners fixed between the web 11 and the flanges 12, 13 with nails, screws, screws, tackers, or the like to cover the beam 1.

[0078] The fire-resistant covering plate 38 is a plate-shaped covering material that covers the lower surface of the plate member 3. The fire-resistant covering plate 38 may be fixed to the plate member 3, for example, with nails, screws, bolts, tackers, or the like.

[0079] 2 and 7, when the side surface of the frame material 7 and the end surface of the side of the beam 1 (end surfaces of the flanges 12, 13) are flush with each other, the same fire-resistant covering plate 81 may cover the entire area from the side surface of the frame material 7 to the end surface of the side of the beam 1. The upper end surface of the fire-resistant covering plate 81 may be abutted against the lower surface of the plate member 3. In this case, the end surface of the fire-resistant covering plate 38 on the side closest to the beam 1 may be abutted against the plate surface of the fire-resistant covering plate 81, so that there is no portion between the fire-resistant covering plate 38 and the fire-resistant covering plate 81 where fire-resistant covering material is not present.

[0080] The thickness of the fire-resistant covering plate 8 and the fire-resistant covering plate 38 is sufficient if it is 20 mm or more and 40 mm or less, for example, 25 mm or 35 mm. If a fire breaks out in the space below the beam 1, it is generally known that increasing the thickness of the fire-resistant covering plate 8 can suppress the temperature rise of the beam 1, thereby suppressing the temperature rise of the plate member 3 due to heat conduction from the beam 1. However, in the fire-resistant structure 100, because heat conduction between the beam 1 and the plate member 3 is suppressed, the thickness of the fire-resistant covering plate 8 does not need to be so large (for example, does not need to be thicker than 40 mm) to achieve sufficiently high fire resistance.

[0081] The fire-resistant structure 100 described above can be constructed and built as follows. That is, the construction method for the fire-resistant structure 100 shown in Fig. 2 and other figures includes the steps of placing frame material 7 on the upper surfaces of beams 1, placing plate members 3 on the upper surfaces of frame material 7 to separate beams 1 and plate members 3, and filling filler material 6 into the frame of frame material 7.

[0082] For example, in a construction method for fire-resistant structure 100, a frame material 7 may be placed on the upper surface of beam 1, and then a plate member 3 having a first through hole 4 may be placed on the upper surface of frame material 7 to separate beam 1 and plate member 3, and then filler material 6 through first through hole 4 into first through hole 4 and second through hole 74 within the frame of frame material 7 to construct fire-resistant structure 100. When frame material 7 is plate-shaped, the lower surface of frame material 7 is placed along the upper surface of beam 1, and the upper surface of frame material 7 is placed along the lower surface of plate member 3. In this case, it is advisable to adjust the position of frame material 7 so that first through hole 4 and second through hole 74 overlap in a top view.

[0083] If the filler 6 is grout, the grout before hardening has a sufficiently high fluidity, so that by pouring the grout before hardening into the second through hole 74 through the first through hole 4, the filler 6 can be filled into the first through hole 4 and the second through hole 74.

[0084] When placing the frame material 7 on the upper surface of the beam 1, an adhesive may be used, if necessary, to temporarily fix the frame material 7 to the beam 1. By applying an adhesive between the frame material 7 and the beam 1 and temporarily fixing the frame material 7 to the beam 1, it is possible to prevent the frame material 7 from shifting in position when placing the frame material 7 on the upper surface of the beam 1, or when placing the plate member 3 on the frame material 7.

[0085] When placing the frame material 7 on the top surface of the beam 1, it is advisable to make the side surface of the frame material 7 (the side surface on the outer side in the width direction when viewed from the beam 1) flush with the end surface of the side of the beam 1 (the end surfaces of the flanges 12, 13, the outer end surfaces in the width direction). This allows the side surface of the frame material 7 to be covered with the same fire-resistant covering plate 81 all the way to the end surface of the side of the beam 1.

[0086] Below, a modification of the embodiment described above will be described.

[0087] (Variation 1) In the above embodiment, as shown in FIGS. 1 and 2, the frame member 7 is a flat, rectangular member when viewed from above, and one frame member 7 supports the end 30 of one plate member 3, plate member 3A, and the end 30 of the other plate member 3, plate member 3B, as an example. Also, as shown in FIGS. 5 and 6, a case has been described in which six second through holes 74 are formed in the frame member 7. However, the frame member 7 can be modified in various ways. Note that FIG. 5 shows a view of the frame member 7 from above (top view). FIG. 6 shows a view of the frame member 7 from a side.

[0088] Fig. 8 shows a view of the fire-resistant structure 100 according to Modification 1 as seen from above. Fig. 9 shows a cross-sectional view of the fire-resistant structure 100 according to Modification 1 as seen from the side (horizontally). Fig. 9 is a cross-sectional view taken along the line IX-IX in Fig. 8. Fig. 10 is a top view of the frame material 7 according to Modification 1.

[0089] As shown in Figures 8 to 10, a plurality of frame materials 7 (three in the example shown in Figure 8) may support the end portion 30 of a certain plate member 3. For example, as shown in Figures 8 and 9, the frame material 7 may be placed on the beam 1 with its longitudinal direction aligned along a direction intersecting the extension direction of the beam 1 (the width direction of the beam 1). Figure 9 shows an example in which the side surface of the frame material 7 and the end faces of the side portions of the beam 1 (end faces of the flanges 12, 13) are flush with each other.

[0090] The frame materials 7 may be spaced apart from adjacent frame materials 7 in the direction along the extension direction of the beam 1, or may be in contact with adjacent frame materials 7. Figure 8 shows an example in which adjacent frame materials 7, 7 are spaced apart from each other in the direction along the extension direction of the beam 1.

[0091] 9 and 10, the frame material 7 may have two (two) second through holes 74 formed along the width direction of the beam 1. Note that the frame material 7 shown in Fig. 10 has two second through holes 74 arranged in a row along the longitudinal direction of the frame material 7, but as shown in Fig. 9, when this frame material 7 is placed on the beam 1, the two second through holes 74 are aligned along the width direction of the beam 1.

[0092] (Variation 2) In the above embodiment, as shown in Fig. 2, the frame material 7 is arranged along the underside of the plate member 3, and the frame material 7 is arranged between the flange 12 of the beam 1 and the plate member 3. However, as shown in Figs. 11 to 13, a recess 37 serving as a seat for the frame material 7 may be formed in the plate member 3, and the frame material 7 may be fitted into this recess 37. In other words, the plate member 3 may have a recess 37 formed on its underside into which the frame material 7 is fitted.

[0093] Fig. 11 shows a view of the fire-resistant structure 100 according to Modification 2 as seen from above. Fig. 12 shows a cross-sectional view of the fire-resistant structure 100 according to Modification 2 as seen from the side (horizontally). Fig. 12 is a cross-sectional view taken along the arrows XII-XII in Fig. 11. Fig. 12 illustrates a case in which the lower surface of the plate member 3 and the lower surface of the frame member 7 are flush with each other. Fig. 13 is a view of the plate member 3 having a recess formed therein as seen from the side along the end face of the end portion 30.

[0094] The recess 37 may be formed by cutting out a part of the lower surface of the end portion 30 of the plate member 3, as shown in FIGS.

[0095] 12 shows an example in which the side surface of the frame material 7 and the end surface of the side portion of the beam 1 (end surfaces of the flanges 12, 13) are flush with each other.

[0096] By constructing the fire-resistant structure 100 by fitting the frame material 7 into the recess 37 formed in the plate member 3, the height of the fire-resistant structure 100 can be reduced (the thickness of the fire-resistant structure 100 can be reduced).

[0097] (Variation 3) In the above embodiment, a case has been described in which one frame member 7 supports adjacent plate members 3, 3 with their ends 30, 30 facing each other, i.e., the end 30 of plate member 3A and the end 30 of plate member 3B, as shown in Figures 1 and 2. However, the frame member 7 may support only one plate member 3.

[0098] Fig. 14 shows a view (top view) of the fireproof structure 100 according to Modification 3 as seen from above. Fig. 15 shows a cross-sectional view (horizontal view) of the fireproof structure 100 according to Modification 3 as seen from the side. Fig. 15 is a cross-sectional view taken along the XV-XV arrows in Fig. 14. Fig. 16 is a top view of a frame material 7A according to Modification 3.

[0099] Figures 14 and 15 show an example in which, on a beam 1, a frame material 7, frame material 7A, supports only one plate member 3A (one of the plate members 3), and another frame material 7, frame material 7B, adjacent to frame material 7A in the width direction of the beam 1, supports only plate member 3B (the other plate member 3).

[0100] In this case, the frame material 7 (frame material 7A) may have three second through holes 74 formed along the longitudinal direction, as shown in Fig. 16. The frame material 7 may be placed on the beam 1 with the longitudinal direction aligned with the extension direction of the beam 1, as shown in Figs. 14 and 15. Note that Figs. 16 and 17 illustrate an example in which the frame material 7 is fitted into the recess 37 of the plate member 3, similar to the case illustrated in Modification 2.

[0101] (Variation 4) In the above embodiment, the fire-resistant structure 100 is formed by placing the frame material 7 on the upper surface of the beam 1, then placing the plate member 3 on the upper surface of the frame material 7 to separate the beam 1 and the plate member 3, and then filling the filler material 6 through the first through hole 4 and the second through hole 74 within the frame of the frame material 7. In other words, the frame material 7 and the plate member 3 are separately placed on the beam 1 (in that order). However, the frame material 7 may be incorporated into the plate member 3 in advance.

[0102] 17 and 18 show an example of a panel material 300 in which a frame material 7 is previously assembled into a plate member 3. The panel material 300 is a plate unit in which the frame material 7 is previously fitted into a recess 37 formed in the plate member 3. In the panel material 300, as an example, the lower surface of the plate member 3 and the lower surface of the frame material 7 are flush with each other. Note that FIG. 17 shows, as an example, a case in which the panel material 300 is formed by attaching the frame material 7A exemplified in the above-mentioned modified example 3 to the plate member 3. Furthermore, FIG. 18 shows, as another example, a case in which the panel material 300 is formed by attaching the frame material 7 shown in FIGS. 1, 2, 5, and 6 of the above-mentioned embodiment to the plate member 3.

[0103] That is, as shown in Figures 17 and 18, the panel material 300 comprises a plate member 3 having a recess 37 formed on its underside, and a frame material 7 fitted into the recess 37, wherein the plate member 3 has a first through hole 4 formed to penetrate its plate surface, and the frame material 7 is made of lightweight aerated concrete and has a second through hole 74 formed to penetrate its plate surface, and the first through hole 4 and the second through hole 37 may overlap when viewed from above.

[0104] When constructing a fire-resistant structure 100 using panel material 300, the fire-resistant structure 100 can be formed by placing the frame material 7 portion of the panel material 300 on the upper surface of the beam 1, and then filling the first through hole 4 and the second through hole 74 within the frame of the frame material 7 with filler material 6 through the first through hole 4.

[0105] The panel materials 300 can be pre-assembled in a factory, etc. Then, at the building construction site, the fire-resistant structure 100 and floor A (see FIGS. 3 and 4) can be constructed using the panel materials 300.

[0106] In this way, it is possible to provide a fire-resistant structure that suppresses heat conduction between the beams and the floor board members, a panel material that realizes the fire-resistant structure, and a construction method for the fire-resistant structure.

[0107] [Another embodiment] (1) In the above embodiment, it has been explained that in the fire-resistant structure 100 shown in Fig. 1 and other figures, the fire-resistant covering plate 81 may be fixed to the stiffeners fixed between the web 11 and the flanges 12, 13 with nails, screws, bolts, tackers, or the like. However, as shown in Fig. 19, the fire-resistant covering plate 81 may also be fixed to the frame material 7 or the filler material 6 with fasteners such as screws or nails. Fig. 19 shows a case in which the fire-resistant covering plate 81 is fixed with fasteners 86 that are inserted into the filler material 6 through the frame material 7.

[0108] When the frame material 7 is made of ALC with internal reinforcing bars, the fasteners 86 for fixing the fire-resistant covering board 81 may be placed (inserted) near the reinforcing bars. This may improve the pull-out strength of the fasteners 86. It may also be possible to prevent cone breakage of the frame material 7 (ALC).

[0109] (2) In the above embodiment, as shown in Figures 2, 7, 9, and 12, the fire-resistant structure 100 has been described with an example in which the side surface of the frame material 7 and the end surface of the side of the beam 1 (end surface of the flanges 12, 13) are flush with each other. However, the side surface of the frame material 7 and the end surface of the side of the beam 1 do not necessarily have to be flush with each other. Specifically, the frame material 7 may protrude from the beam 1 in a top view. In other words, the area of ​​the frame material 7 located on the opposite side of the end 30 (edge ​​opening) of the plate member 3 as viewed from the first through hole 4 may extend over a range that does not overlap with the beam 1 when viewed along the normal direction of the plate surface of the plate member 3, i.e., when viewed from above.

[0110] 20, in fire-resistant structure 100, the end of the side of frame material 7 (the side facing plate member 3) may extend to the outside of beam 1 (flange 12) in a top view, i.e., to the outside of beam 1, so that frame material 7 protrudes from beam 1. When frame material 7 is fitted into recess 37 formed in plate member 3 and the bottom surface of plate member 3 and the bottom surface of frame material 7 are flush with each other, even if frame material 7 protrudes from beam 1 in a top view, frame material 7 does not become a three-dimensional obstacle when the side surface of beam 1 is covered with fire-resistant covering plate 81.

[0111] When the fire-resistant structure 100 is constructed so that the frame material 7 protrudes from the beam 1 with the side ends of the frame material 7 extending to the outside of the beam 1 in a top view, the fire-resistant covering plate 38 may be disposed so as to abut against the underside of the frame material 7. In other words, when the frame material 7 protrudes from the beam 1 with the side ends of the frame material 7 extending to the outside, the underside of the plate member 3 and the underside of the frame material 7 may be covered with the same fire-resistant covering plate 38.

[0112] If the fire-resistant structure 100 is constructed so that the side ends of the frame material 7 extend beyond the beam 1 when viewed from above, and so that the frame material 7 protrudes from the beam 1, it may be possible to better suppress heat conduction between the beam 1 and the plate member 3.

[0113] If the fire-resistant structure 100 is constructed so that the side ends of the frame material 7 extend beyond the beam 1 when viewed from above, and so that the frame material 7 protrudes from the beam 1, the area of ​​the frame material 7 that can withstand the vertical load applied to the frame material 7 (the area of ​​the upper surface and the area of ​​the lower surface of the frame material 7) can be made larger relative to the size of the vertical load applied to the frame material 7, and the fire-resistant structure 100 may become a stronger connecting structure.

[0114] (3) In the above embodiment, as shown in Fig. 2 and other figures, it has been explained that in the fire-resistant structure 100, the frame material 7 may be a flat, rectangular member in a top view, with one or more second through holes 74 formed as spaces (openings) within the frame. As a specific example, a case has been described in which the frame material 7 is a plate-like member made of an ALC plate, with one or more second through holes 74 formed so as to penetrate the plate surface. However, the frame material 7 is not limited to a case in which the opening within the frame is the second through hole 74.

[0115] 21, 22, and 23 illustrate an example in which the frame material 7 does not have second through holes 74 (see FIG. 2) formed in the plate surface, but is a frame 70 formed in a rectangular shape when viewed from above. A rectangular opening 75 is formed inside the frame 70. FIG. 21 is a top view of the fire-resistant structure 100 of this example. FIG. 22 shows a cross-sectional view of the fire-resistant structure 100 of this example as seen from the side (cross-sectional view taken along arrows XXII-XXII in FIG. 21). FIG. 23 is a top view of the frame material 7.

[0116] In this case, the frame material 7 is placed on the upper surface of the beam 1, and then the plate member 3 having the first through hole 4 is placed on the upper surface of the frame material 7 to separate the beam 1 and the plate member 3, and then the filler material 6 is filled through the first through hole 4 into the first through hole 4 and the space within the opening 75 within the frame of the frame material 7 (frame 70) to construct the fire-resistant structure 100.

[0117] (4) In the above embodiment, as shown in FIG. 2 and other figures, a case has been described in which the filler 6 is filled in the first through hole 4 and the second through hole 74 within the frame of the frame material 7 in the fire-resistant structure 100. However, the first through hole 4 is not essential for the fire-resistant structure 100. Furthermore, the frame material 7 is not limited to a case in which the opening portion within the frame is the second through hole 74.

[0118] 24 and 25 show an example in which the plate member 3 does not have the first through hole 4, and the frame member 7 does not have the second through hole 74 (see FIG. 2) formed in the plate surface, but has a frame 70 (see FIG. 23) formed in a rectangular shape when viewed from above. A rectangular opening 75 is formed inside the frame 70. FIG. 24 is a top view of the fire-resistant structure 100 of this example. FIG. 25 shows a cross-sectional view of the fire-resistant structure 100 of this example as viewed from the side (cross-sectional view taken along the arrows XXV-XXV in FIG. 24).

[0119] In this case, the fire-resistant structure 100 may be constructed by a construction method in which the frame material 7 is first placed on the top surface of the beam 1, then the filler material 6 is filled inside the frame of the frame material 7 (opening 75), and then the plate member 3 is placed on the top surface of the frame material 7 to separate the beam 1 and the plate member 3.

[0120] In the examples shown in FIGS. 24 and 25, the fire-resistant structure 100 does not necessarily have to include the extension member 2.

[0121] (5) In the above embodiment, as an example of a construction method for the fire-resistant structure 100 shown in FIG. 2 and the like, a case was described in which a frame member 7 is placed on the top surface of a beam 1, a plate member 3 having a first through hole 4 is placed on the top surface of the frame member 7 to separate the beam 1 and the plate member 3, and then the filler material 6 is filled through the first through hole 4 into the first through hole 4 and the second through hole 74 within the frame of the frame member 7 to construct the fire-resistant structure 100. However, the fire-resistant structure 100 can also be constructed by placing a frame member 7 on the top surface of a beam 1, then placing a plate member 3 not having a first through hole 4 on the top surface of the frame member 7 to separate the beam 1 and the plate member 3, and then forming a first through hole 4 in the plate member 3, and then filling the first through hole 4 and the second through hole 74 within the frame of the frame member 7 with the filler material 6 through the formed first through hole 4.

[0122] (6) In the above embodiment, the frame material 7 is fitted into the recess 37 of the plate member 3 in the fire-resistant structure 100. In this case, the frame material 7 may be fixed to the plate member 3 with fasteners such as screws or nails.

[0123] Specifically, for example, as shown in Figures 26 and 27, with the frame material 7 fitted into the recess 37, fasteners 73 such as screws or nails may be screwed into the frame material 7 from the underside of the frame material 7 or inserted into the frame material 7 to fix it to the plate member 3. In other words, the fasteners 73 may be passed through the frame material 7 and reach the plate member 3 to fix the frame material 7 to the plate member 3. Note that Figure 26 is a view of the plate member 3 and the frame member 7 from the underside. Figure 27 is a view of the plate member 3 and the frame member 7 from the end face side of the end portion 30 of the plate member 3.

[0124] Such a fastener 73 may be arranged, for example, near the second through hole 74 in the frame member 7. Figures 26 and 27 show a case in which fasteners 73, 73 are arranged on both sides of the second through hole 74 of the frame member 7 fitted into the recess 37. In this case, the fasteners 73, 73 may be arranged in a direction along the end face of the end portion 30 of the plate member 3 (the extension direction of the beam 1 shown in Figure 11, etc.), and at positions symmetrical about the center of the second through hole 74. This allows the frame member 7 to be firmly fixed to the plate member 3.

[0125] When the frame material 7 is made of ALC with internal reinforcing bars, the fasteners 73 that secure the frame material 7 to the plate members 3 may be disposed (inserted) near the reinforcing bars. This may improve the pull-out strength of the fasteners 73. It may also be possible to prevent cone breakage of the frame material 7 (ALC).

[0126] (7) In the above embodiment, the frame material 7 is placed on the beam 1 in the fire-resistant structure 100. However, the frame material 7 is not limited to being placed on the beam 1. For example, the frame material 7 may have a reinforcing plate with a thickness of approximately 1.2 mm to 6 mm attached to its underside, and may be placed on the beam 1 via the reinforcing plate. This reinforcing plate may reinforce the frame material 7, making the fire-resistant structure 100 a strong connection structure. The reinforcing plate may be, for example, a metal plate (strip-shaped metal).

[0127] (8) In the above embodiment, the fire-resistant structure 100 has been described with reference to an example in which the fire-resistant covering plates 8 and 38 covering the beams 1 and plate members 3 are plate-shaped covering materials formed of a fire-resistant material. In the fire-resistant structure 100, instead of the fire-resistant covering plates 8 and 38, a covering layer formed by spraying mortar, rock wool, or the like may be used as the fire-resistant covering material covering the beams 1 and plate members 3.

[0128] (9) In the above embodiment, as shown in FIG. 2 and other figures, it has been described that the first through hole 4 overlaps with the second through hole 74 in a top view when the plate member 3 is placed on the frame member 7. That is, it has been described that the second through hole 74 may be arranged so as to overlap with the first through hole 4 in a top view when the frame member 7 is disposed between the beam 1 and the plate member 3. In addition, as an example, the second through hole 74 and the first through hole 4 may have approximately the same shape in a top view, and as shown in FIG. 2, the second through hole 74 and the first through hole 4 are circular shapes with the same diameter, and their centers overlap in a top view.

[0129] However, the second through hole 74 and the first through hole 4 are not limited to having roughly the same shape in a top view. The second through hole 74 and the first through hole 4 may have different shapes or different diameters in a top view. The diameter of the second through hole 74 may be larger than the diameter of the first through hole 4, or the diameter of the first through hole 4 may be larger than the diameter of the second through hole 74.

[0130] Furthermore, the centers or centers of gravity of the second through hole 74 and the first through hole 4 do not need to overlap in top view, and the centers or centers of gravity of the second through hole 74 and the first through hole 4 may be at different positions in top view. It is sufficient that the second through hole 74 and the first through hole 4 have a portion of their holes (opening portions) overlap.

[0131] (10) In the above embodiment, it has been described that in the fire-resistant structure 100, the frame material 7 has a portion that is formed in a ring shape when viewed from above, and as an example, one or more second through holes 74 may be formed therein. It has also been described that the second through hole 74 may be circular or rectangular when viewed from above, and Fig. 5 illustrates an example in which the second through hole 74 is circular when viewed from above. However, the second through hole 74 is not limited to being circular or rectangular when viewed from above.

[0132] The second through holes 74 may be, for example, oval in top view, as shown in Figures 28 and 29. Figure 28 is a top view of the frame material 7 when the second through holes 74 are oval. Figure 29 is a side view of this frame material 7.

[0133] As shown in Figures 28 and 29, when the second through hole 74 is oval in top view, the longitudinal direction of the second through hole 74 in top view may be arranged along the longitudinal direction of the frame material 7, or may be arranged along a direction intersecting the longitudinal direction of the frame material 7.

[0134] When the second through hole 74 has an oval shape in top view as described above, the second through hole 74 may overlap two or more first through holes 4 in top view as shown in FIG. 30 . By overlapping the second through hole 74 with two or more first through holes 4 in this way, for example, when constructing the fire-resistant structure 100 by filling the filler material 6 into the first through hole 4 and the second through holes 74 within the frame of the frame member 7 via the first through hole 4 as described in the above embodiment, the effort of filling the filler material 6 may be reduced. Specifically, for example, if the filler material 6 is grout, the grout before hardening has sufficiently high fluidity. Therefore, by filling the filler material 6 into a second through hole 74 that overlaps with this first through hole 4 in top view via a certain first through hole 4 (by pouring the grout before hardening), it may be possible to fill another first through hole 4 that overlaps with the same second through hole 74 in top view with the filler material 6.

[0135] When the second through holes 74 in the frame material 7 are formed in an oval shape, the arrangement of the frame material 7 and the second through holes 74 can be varied in addition to the arrangement of the frame material 7 and the second through holes 74 shown in Figure 28.

[0136] For example, as shown in Fig. 31, in the frame material 7, a plurality of second through holes 74 (two in Fig. 31) may be arranged such that the longitudinal direction of the second through holes 74 is aligned only along the longitudinal direction of the frame material 7. Note that Fig. 31 illustrates an example in which the second through holes 74 aligned along the longitudinal direction of the frame material 7 are arranged in two rows in the short direction of the frame material 7.

[0137] 32, only one second through hole 74 may be disposed in the frame material 7, with its longitudinal direction aligned only along the longitudinal direction of the frame material 7. In this case, the second through hole 74 of the frame material 7 may be arranged such that its longitudinal direction is aligned with the width direction of the beam 1 when the frame material 7 is placed on the beam 1, as shown in FIG.

[0138] Although not shown, when the frame material 7 is placed on the beam 1, the longitudinal direction of the second through hole 74 may be aligned with the extension direction of the beam 1.

[0139] (11) In the above embodiment, it has been described that in the fire-resistant structure 100, the frame material 7 has a portion that is formed in a ring shape when viewed from above, and as an example, one or more second through holes 74 may be formed therein. FIG. 5 illustrates an example in which six second through holes 74 are formed in the frame material 7. Although the second through holes 74 shown in FIG. 5 do not communicate with adjacent second through holes 74, the second through holes 74 may communicate with adjacent second through holes 74 as shown in FIGS. 34 and 35 .

[0140] Fig. 34 is a top view of the frame material 7 in which the second through holes 74 communicate with adjacent second through holes 74. Fig. 35 is a side view of this frame material 7. Figs. 29 and 30 illustrate an example in which adjacent second through holes 74, 74 in the longitudinal direction of the frame material 7 are communicated and connected by a communicating groove 79, which is a groove formed on the back surface side of the frame material 7. The back surface of the frame material 7 refers to the surface of the frame material 7 that faces the beam 1 when the frame material 7 is placed on the beam 1 (see Fig. 2, etc.).

[0141] In this way, adjacent second through holes 74, 74 are connected in communication with each other by a communicating groove 79, which is a groove formed on the back side of the frame material 7. For example, when constructing a fire-resistant structure 100 by filling a filler material 6 into a first through hole 4 and a second through hole 74 within the frame material 7 through the first through hole 4 as described in the above embodiment, if the filler material 6 is filled into a second through hole 74 that overlaps with the first through hole 4 in a top view through a certain first through hole 4, as shown in Figure 36, it may be possible to fill another second through hole 74 that communicates with the second through hole 74 through the communicating groove 79. If the filler material 6 is grout, because grout before hardening has sufficiently high fluidity, it may be possible to fill another first through hole 4 that overlaps with the other second through hole 74 in a top view through the other second through hole 74 with the filler material 6.

[0142] (11) In the above embodiment, as shown in Figure 2 and other figures, the fire-resistant structure 100 has been described in which the frame material 7 is a flat member that is rectangular in top view, and one or more second through holes 74 are formed as spaces (openings) within the frame. Also, the fire-resistant structure 100 has been described in which the frame material 7 is a frame 70 (see Figure 23) that is rectangular in top view, and the frame 70 has rectangular openings 75 within it.

[0143] Such frame material 7 may be a single piece, or may be formed by arranging or stacking ALC plates or ALC blocks, for example. When frame material 7 is, for example, frame 70 (see FIG. 23), frame 70 may be formed by arranging ALC plates or ALC blocks in a rectangular shape (rectangular ring) when viewed from above.

[0144] 37 and 38 show an example in which beams 1, 1 are joined by slice plates 15, and a frame 70 serving as a frame material 7 is placed on flanges 12, 12 on which the slice plates 15 are arranged.

[0145] A plurality of slice plates 15 (for example, six plates) are used, and each is fixed to the beams 1, 1 by bolts 19 or the like.

[0146] Figure 37 is a view of the frame material 7 on the beams 1,1 (on the flanges 12,12) as seen from the side (however, in a direction intersecting the extending direction of the beam 1). Figure 38 is a view (top view) of the frame material 7 on the flanges 12,12 (see Figure 37) as seen from above.

[0147] 37 and 38 show an example in which a portion of the frame 70 is placed on the slice plate 15. The frame 70 is composed of plate-shaped frame members 72, 72 (see FIG. 38) and block-shaped frame members 71, 71 placed on the flange 12.

[0148] The plate frame members 72, 72 are disposed only on the slice plate 15, and the plate surfaces are disposed in parallel.

[0149] The block-shaped frame members 71, 71 are arranged in abutment against the end of the plate frame members 72, 72 in the extension direction of the beam 1 (the end on the side close to the block-shaped frame members 71, 71) and the end of the slice plate 15 in the extension direction of the beam 1 (similarly the end on the side close to the block-shaped frame members 71, 71).

[0150] In the frame 70, a rectangular opening 75 may be formed within the frame surrounded by the plate frame members 72, 72 and the block-shaped frame members 71, 71. A plate member 3 (see FIG. 37) may be placed on such a frame 70 to separate the beam 1 from the plate member 3, and a filler material 6 (see FIG. 25, etc.) may be filled in the opening 75 to construct a fire-resistant structure 100.

[0151] Similarly, Figures 39 and 40 show an example in which beams 1, 1 are joined by slice plates 15, and a frame 70 as a frame material 7 is placed on flanges 12, 12 on which the slice plates 15 are arranged.

[0152] A plurality of slice plates 12 (for example, six plates) are used, and each is fixed to the beams 1, 1 by bolts 19 or the like.

[0153] Figure 39 is a view of the frame material 7 on the beams 1,1 (on the flanges 12,12) as seen from the side (however, in a direction intersecting the extending direction of the beam 1). Figure 40 is a view (top view) of the frame material 7 on the flanges 12,12 as seen from above.

[0154] One beam 1 is supported by a pillar 9 .

[0155] 39 and 40 show an example in which a portion of the frame 70 is placed on the slice plate 15. The frame 70 is composed of plate-shaped frame members 72, 72 (see FIG. 40) and block-shaped frame members 71, 71 placed on the flange 12.

[0156] The plate frame members 72, 72 are arranged in a range extending from above the flange 12, over the slice plate 15, and onto the adjacent flange 12, with the plate surfaces arranged parallel to each other.

[0157] 39, a recess 72a into which the slice plate 15 fits is formed at the lower end of the plate frame member 72. The lower end of the plate frame member 72 abuts against the upper surfaces of the flanges 12, 12 and the upper surface of the slice plate 15.

[0158] 39 and 40, the block-shaped frame members 71 are arranged in contact with the ends (ends close to the block-shaped frame members 71) of the plate frame members 72 (see FIG. 40) in the extension direction of the beam 1. These block-shaped frame members 71 are spaced apart from the slice plate 15.

[0159] As shown in Figure 40, a rectangular opening 75 may be formed within the frame 70, surrounded by plate frame members 72, 72 and block-shaped frame members 71, 71. Plate members 3 may be placed on such a frame 70 to separate the beams 1 from the plate members 3 (see Figure 40), and the openings 75 may be filled with filler material 6 (see Figure 25, etc.) to construct a fire-resistant structure 100. In this way, unevenness occurs on the beams near the columns due to the bolts and nuts used to connect the beams, but a fire-resistant structure in which the beams are separated from the plate members can be realized by a simple structure in which a frame is formed around the uneven areas and a filler material is filled in the openings.

[0160] 39 and 40, when columns 9 are arranged close to the slice plate 15, the block-shaped frame member 71 on the side close to the columns 9 may be omitted, and the ends of the plate frame members 72, 72 on the side close to the columns 9 may be abutted against the columns 9. In this case, the space surrounded by the block-shaped frame member 71, the plate frame members 72, 72, and the columns 9 may be filled with filler 6 (see FIG. 25, etc.).

[0161] (12) In the above embodiment, the panel material 300 is described as a plate unit in which the frame material 7 is fitted in advance into the recess 37 formed in the plate member 3. It has also been described that the panel material 300 can be pre-assembled in a factory or the like. However, the panel material 300 is not limited to being pre-assembled in a factory.

[0162] The first through holes 4 may not be formed in the plate member 3 in advance, but may be formed in the plate member 3 at the construction site to match the positions of the extension members 2, and the panel material 300 may be completed at the construction site. Similarly, the second through holes 74 may not be formed in the members that will become the frame member 7 in advance, but may be formed in the members that will become the frame member 7 at the construction site to match the positions of the extension members 2, and the panel material 300 may be completed at the construction site.

[0163] It should be noted that the embodiments disclosed in this specification are merely examples, and the embodiments of the present disclosure are not limited to these, and can be modified as appropriate within the scope of the purpose of the present disclosure. [Industrial Applicability]

[0164] The present disclosure is applicable to fire-resistant structures, panel materials, and methods of constructing fire-resistant structures. [Explanation of symbols]

[0165] 1:Beam 10: Edge 100: Fireproof structure 11: Web 12: Flange 13: Flange 15: Sliced ​​plate 19: Bolt 2: Extension member 3: Plate member 3A: Plate member 3B: Plate member 30: Edge 300: Panel material 37: Recess 38: Fireproof covering board 4:First through hole 6: Filling material 7: Frame material 70: Frame 71: Plate-shaped frame member 72: Block-shaped frame member 72a: recess 73: Fixture 74:Second through hole 75: Opening in the frame 79:Connection groove 8: Fireproof cover plate 81: Fireproof covering board 82: Fireproof covering board 86: Fixtures 9: Pillar A: Floor

Claims

1. Beams and A frame material supported on the upper surface of the beam; a flat plate member supported on an upper surface of the frame material; a filler material filled in a space within the frame of the frame material, The frame material is formed of an inorganic material, the filler is formed of an inorganic material, A fire-resistant structure in which the beam and the plate member are spaced apart.

2. the plate member has a first through-hole formed to penetrate through the plate surface; the frame member has a portion formed in a ring shape in a top view, The fire-resistant structure according to claim 1 , wherein the first through hole overlaps with the inside of the ring of the frame material when viewed from above.

3. an extension member fixed to the beam and extending upward from the beam; the first through hole is disposed at an end of the plate surface of the plate member, The extension member is inserted into the first through hole, The fire-resistant structure according to claim 2, wherein the fire-resistant structure is embedded in the filler material.

4. 4. The fire-resistant structure according to claim 3, wherein the frame material is a fire-resistant covering plate.

5. 4. A fire-resistant structure according to claim 3, wherein the frame material is made of lightweight aerated concrete.

6. the frame member has a second through hole formed along the extension direction of the first through hole, the first through hole and the second through hole overlap in a top view, The fire-resistant structure according to claim 5 , wherein the filler is filled in the first through hole and the second through hole.

7. the plate member has a recess formed on a lower surface thereof, The fire-resistant structure according to claim 6, wherein the frame material is fitted into the recess.

8. Further provided is a fireproof covering plate covering the side surface of the beam, The frame material extends to the outside of the beam in a top view, 7. The fire-resistant structure according to claim 6, wherein the upper end surface of the fire-resistant covering plate abuts against the lower surface of the frame material.

9. a plate member having a recess formed on its underside; a frame member fitted into the recess, the plate member has a first through-hole formed to penetrate through the plate surface; The frame material is It is made of lightweight aerated concrete, a second through hole formed along the extending direction of the first through hole; The panel material wherein the first through hole and the second through hole overlap in a top view.

10. A construction method for the fire-resistant structure according to any one of claims 1 to 8, placing the frame material on an upper surface of the beam; a step of placing the plate member on an upper surface of the frame material to space the beam and the plate member apart; and filling the filler material within the frame of the frame material.

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