JP2026042662A - Fire-resistant structures, panel materials, and fire-resistant structure construction methods - Google Patents

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 formed from an inorganic material, and the beam 1 and the plate member 3 are spaced apart.
[Selected Figure] Figure 2

Description

This disclosure relates to fire-resistant structures, panel materials, and methods for constructing fire-resistant structures.

Patent Document 1 discloses a floor structure in which a composite floor slab consisting of a reinforced concrete floor section and wooden floorboards positioned below it is placed on top of 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 top 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 top surfaces of the steel beams with the temporary support members are covered with a concrete layer of the reinforced concrete floor section, and the outer surfaces of the beams other than the top surfaces of the steel beams are covered with a fire-resistant covering material.

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 comprises beam members with flanges arranged at predetermined intervals in one direction, a load-bearing layer composed of multiple pieces of wood arranged side by side, a fire-resistant panel having a first non-combustible layer composed of a non-combustible material arranged on one side of the load-bearing layer, and a second non-combustible layer composed 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 toward the fire-resistant panel and is screwed to a predetermined position on the load-bearing layer with the first non-combustible layer installed on the flange of the beam member as the installation surface.

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 portion that connects the flooring and beams. The beams have fire-resistant material on the sides and fire-resistant material on the underside. The connection portion is arranged 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.

Japanese Patent Application Laid-Open No. 2020-105697 Japanese Patent Application Laid-Open No. 2022-21793 Japanese Patent Application Laid-Open No. 2023-149696

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 for the plate members forming the floor. These plate members are supported by the beams while abutting the upper surfaces of the beams. For this reason, conventional connection structures between beams and floor plate members do not adequately suppress heat conduction between the beams and the plate members. However, if heat conduction between the beams and the plate members in a connection structure between beams and floor plate members can be sufficiently suppressed, it is believed that this connection structure can be made fire-resistant. Therefore, there is a need to provide a fire-resistant structure that suppresses heat conduction between beams and floor plate members, as well as panel materials and construction methods for such fire-resistant structures.

This disclosure was made in light of these circumstances, and its purpose is to provide a fire-resistant structure that suppresses heat conduction between beams and floor boards, a panel material that achieves the fire-resistant structure, and a construction method for the fire-resistant structure.

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.

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.

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.

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

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

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.

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.

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.

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.

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.

This disclosure provides a fire-resistant structure that suppresses heat conduction between beams and floor boards, a panel material that achieves the fire-resistant structure, and a construction method for the fire-resistant structure.

FIG. 2 is a view of the fire-resistant structure according to the present embodiment as seen from above. FIG. 2 is a cross-sectional view of the fireproof structure according to the present embodiment as seen from the side. 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. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3 . FIG. 10 is a view of the frame material from above. FIG. 10 is a side view of the frame material. FIG. 2 is an explanatory diagram showing an example of the arrangement of fire-resistant covering materials. FIG. 10 is a top view of the fire-resistant structure according to the first modified example of the present embodiment. FIG. 10 is a cross-sectional view of a fire-resistant structure according to a first modified example of the present embodiment, as viewed from the side. FIG. 10 is a top view of a frame material in Modification 1. FIG. 10 is a cross-sectional view of a fire-resistant structure according to a second modification of the present embodiment, viewed from above. FIG. 10 is a cross-sectional view of a fire-resistant structure according to a second modification of the present embodiment, as viewed from the side. FIG. 10 is a side view of a plate member according to a second modified example of the present embodiment. FIG. 10 is a top view of a fire-resistant structure according to a third modification of the present embodiment. FIG. 10 is a cross-sectional view of a fire-resistant structure according to a third modification of the present embodiment, as viewed from the side. FIG. 10 is a top view of a frame material in Modification 3. FIG. 1 is a side view of the panel material. FIG. 10 is a side view of another panel material. FIG. 2 is an explanatory diagram showing an example of a method for fixing a fire-resistant covering material. FIG. 10 is an explanatory diagram showing another example of the arrangement of frame materials. FIG. 10 is a top view of another fire-resistant structure. FIG. 10 is a cross-sectional side view of another fire-resistant structure. FIG. 10 is a top view of another frame material. FIG. 10 is a top view of another fire-resistant structure. FIG. 10 is a cross-sectional side view of another fire-resistant structure. FIG. 10 is an explanatory diagram of a case where a frame material is fixed with a fixing tool. FIG. 10 is an explanatory diagram of a case where a frame material is fixed with a fixing tool. 10 is an explanatory diagram of another frame material and another second through hole. FIG. 10 is an explanatory diagram of another frame material and another second through hole. FIG. FIG. 10 is an explanatory view of another case where a filler is filled into a second through hole. 10 is an explanatory diagram of another frame material and another second through hole. FIG. 10 is an explanatory diagram of another frame material and another second through hole. FIG. FIG. 10 is a cross-sectional side view of another fire-resistant structure. FIG. 10 is an explanatory view of another second through hole. FIG. 10 is an explanatory view of another second through hole. FIG. 10 is an explanatory view of another case where a filler is filled into a second through hole. FIG. 10 is a side view of another frame material. FIG. 10 is a top view of another frame material. FIG. 10 is a side view of another frame material. FIG. 10 is a top view of another frame material.

Based on the drawings, we will explain the fire-resistant structure, panel material, and fire-resistant structure construction method according to an embodiment of the present disclosure.

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

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. The frame material 7 is made of an inorganic material, and the filler material 6 is also made of an inorganic material. The beam 1 and the plate member 3 are spaced apart.

In the fire-resistant structure 100, the connection structure between the beams 1 and the plate members 3 that form the floor can suppress heat conduction between the beams 1 and the plate members 3.

The fire-resistant structure 100 is described in detail below.

In the following, up, above, or the upper side in the vertical direction will be referred to simply as up, above, or the upper side, and down, below, or the lower side in the vertical direction will be referred to simply as down, below, or the lower side.In the following, the direction perpendicular to the vertical direction will be referred to simply as the horizontal direction.

The fire-resistant structure 100 is part of the structure of a building, such as a house or office building. One 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 can be pre-standardized. In this case, the framework members and panels can be manufactured in a factory and transported to the construction site, where the building can be assembled.

As shown in Figures 1 and 2, the fire-resistant structure 100 comprises 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 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 comprise 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 underside of the beam 1, and a fire-resistant covering plate 38 that covers the underside of the plate member 3.

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

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

As shown in Figures 1 to 4, beam 1 is a long, skeletal member of a building. Beam 1 is arranged horizontally. Beam 1 is, for example, an H-shaped steel beam, a channel steel beam, a wooden material (wooden beam), or a columnar member (RC beam) made of reinforced concrete. As an example, this embodiment describes the case where 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 Figure 2.

Figure 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 in Figure 2, the flange 12 is arranged vertically above the flange 13.

As shown in Figure 3, the beam 1 may be supported at its ends by pillars 9, for example. Figure 3 shows a case in which the beam 1 is arranged so as to span a pair of pillars 9, 9.

As shown in Figures 1 and 2, the extension member 2 is fixed to the upper surface of the rod-shaped beam 1 so as to extend upward from the upper surface of the beam 1. Figures 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.

The extension member 2 may be inserted into the first through hole 4 of the plate member 3, as described below. The extension member 2 is also embedded in the filler material 6.

Examples of the extension member 2 are rod-shaped or plate-shaped members. The cross section of the extension member 2 that intersects with the extension direction of the extension member 2 may be, for example, circular, rectangular, or polygonal, or X-shaped. The extension direction of the extension member 2 may be along the vertical direction, and as an example, is parallel to the vertical direction.

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. If 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 inserted and fixed so as to extend to the upper side.

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

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, for example, on the plate surface of the flange 12 of the beam 1 via a frame member 7. In other words, the plate member 3 is supported on the upper surface of the frame member 7, which 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.

Figures 1 and 2 illustrate an example of a fire-resistant structure 100 in which plate member 3A 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) is supported on the upper surface of the other end of flange 12.

In the fire-resistant structure 100, as shown in Figures 3 and 4, 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.

An example of the board member 3 shown in Figures 1 and 2 is a wooden panel. In this embodiment, the board member 3 is illustrated as being cross-laminated timber (also known as CLT: Cross Laminated Timber). The board member 3 is attached by being placed on the beam 1, for example. The board member 3 is positioned 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.

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, when the plate member 3 is placed on the frame member 7, the first through hole 4 is formed so that its extension direction is aligned with the vertical direction.

The first through hole 4 may be located at the 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 to 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.

As shown in Figures 1 and 3, multiple 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 Figure 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.

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 enlarged. 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.

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.

As will be described later, the first through hole 4 is positioned so that, when the plate member 3 is placed on the frame material 7, it overlaps with an opening (second through hole 74 in this embodiment), which is the space within the frame of the frame material 7, in a top view. If the frame material 7 is formed in a ring shape, as will be described later, it is preferable that the first through hole 4 overlaps with the inside of the ring formed by the frame material 7 in a top view.

In this embodiment, "annular" refers to a shape that defines a closed area, and includes circular, rectangular, and other polygonal shapes. Furthermore, in this embodiment, "frame" refers to something that surrounds something with a border, such as a through-hole or a frame-shaped component that is rectangular or circular when viewed from above, and has an annular wall portion when viewed from above.

If 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 when viewed from above. In this case, the extension member 2 may be inserted into the first through hole 4. In other words, the plate member 3 may be placed on the beam 1 with the extension member 2 inserted into the first through hole 4.

It is preferable that the axial direction of the extension member 2 and the axial direction of the first through hole 4 are aligned. It is preferable that the axial center of the extension member 2 and the axial center of the first through hole 4 overlap, but the respective axial centers may be offset.

As shown in Figures 1 and 2, the frame material 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 material 7 also serves to separate the beam 1 and the plate member 3. Figures 1 and 2 illustrate an example in which one frame material 7 supports adjacent plate members 3, 3 with their ends 30, 30 facing each other, i.e., the end 30 of one plate member 3, plate member 3A, and the end 30 of the other plate member 3, plate member 3B.

The frame material 7 is made of an inorganic material. By separating the beam 1 and the plate member 3, the frame material 7 made of an inorganic material can suppress 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.

As shown in Figure 5, the frame material 7 may, for example, be formed in the shape of a rectangular plate when viewed from above. As shown in Figures 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.

As shown in Figures 1 and 2, the frame material 7 may be positioned with its plate surface aligned with the plate surface of the plate member 3. Figure 2 illustrates an example in which the frame material 7 is positioned along the underside of the plate member 3, and is positioned between the flange 12 of the beam 1 and the plate member 3.

The frame material 7 may be positioned only within the area that overlaps with the flange 12 of the beam 1 in a top view, i.e., in the normal direction to the plate surface of the plate member 3. In other words, the frame material 7 may be positioned so that it does not extend beyond the flange 12 of the beam 1 in a top view. This may facilitate fire-resistant coating of the beam 1 or plate member 3 using a fire-resistant coating plate 81 (fire-resistant coating plate 8 covering the side surface of the beam 1), as described below. This may prevent the frame material 7 from protruding beyond the beam 1 in a top view (extending beyond the beam 1 in a top view) and forming a convex portion (a three-dimensional obstacle that interferes with the fire-resistant coating plate 81), making the coating easier. 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.

The frame material 7 is made of an inorganic material with a lower thermal conductivity than the material forming the beam 1. This allows the fire-resistant structure 100 to better suppress heat conduction between the beam 1 and the plate member 3.

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 also 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 other cause, the frame material 7 may be able to slow 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.

Examples of inorganic materials that can be used to form the frame material 7 include fire-resistant cladding boards such as gypsum boards and lightweight aerated concrete (ALC), such as lightweight aerated concrete boards (ALC boards) and lightweight aerated concrete blocks (ALC blocks). Since ALC, such as ALC boards and ALC blocks, is a lightweight concrete material, forming the frame material 7 from ALC, such as ALC boards and ALC blocks, can make the frame material 7 lightweight. A lightweight frame material 7 also facilitates the installation of the frame material 7 on the beams 1 and the positioning of the frame material 7 on the beams 1. It also contributes to reducing the weight of the entire building.

Also, among inorganic materials with low thermal conductivity (which inhibits thermal conduction), ALC is resistant to vertical loads, so it can sometimes be used as a connecting structure to make the fire-resistant structure 100 stronger.

When the frame material 7 is made of ALC board, it is preferable to use an ALC board with internal reinforcing bars. The presence of reinforcing bars in the ALC board increases the compressive strength of the frame material 7. This also prevents a decrease in the strength of the frame material 7 due to the formation of the second through holes 74, allowing the frame material 7 (ALC board) to maintain its shape for a long period of time. It also helps prevent damage to the frame material 7 (for example, crumbling) when installing the frame material 7 on the beam 1.

When the frame material 7 is made of ALC board, 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 (e.g., two layers) in the thickness direction (vertical direction) of the frame material 7. It is preferable to use two layers of reinforcing bars.

When the frame material 7 is made of ALC board and has two layers of reinforcing bars, the upper reinforcing bars help to reduce 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 help to make the frame material 7 (ALC board) less likely to break in the vertical direction.

If the frame material 7 is made of ALC board and has a single layer of reinforcing bars, the reinforcing bars should be positioned in the center of the thickness of the frame material 7.

When the frame material 7 is made of an ALC board, the thickness of the frame material 7 (ALC board) should be between 30 mm and 60 mm, for example, a board with a thickness of 37 mm or 50 mm is sufficient.

When the frame material 7 is made of ALC blocks, ALC blocks with internal reinforcing bars may be used, as in the case of ALC boards. Having reinforcing bars in the ALC blocks increases the compressive strength of the frame material 7, as in the case of ALC boards.

The frame material 7 may have a portion formed in an annular shape in top view. That is, as shown in Figures 1, 5, and 6, the frame material 7 may be, for example, a flat, rectangular member in top view, with 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 of the frame material 7. Furthermore, 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 top view. In the example shown in Figures 5 and 6, two rows of second through holes 74 are formed in the frame material 7 along the short side of the frame material 7 in top view, with three second through holes per row along the long side.

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 holes 4.

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.

As shown in FIG. 2, the second through hole 74 may be positioned so as to overlap with the first through hole 4 in a top view when the frame material 7 is positioned between the beam 1 and the plate member 3. That is, the second through hole 74 may be positioned 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 approximately 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.

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

The space within the frame of the frame material 7 is filled with filler material 6. Together with the frame material 7, the filler material 6 separates the plate member 3 from the beam 1, contributing 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).

If the frame material 7 has second through holes 74 that form the space within the frame, the second through holes 74 are filled with the filler material 6.

In this embodiment, as shown in Figures 2 and 7, the filler material 6 is filled into the second through hole 74 and the first through hole 4. The filler material 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, this embodiment not only achieves a fire-resistant structure that suppresses heat conduction between the beam 1 and the plate member 3, but also achieves a connection structure that firmly joins the beam 1 and the plate member 3.

The filler 6 is primarily made 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). Of 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 within the first through hole 4. If gaps form in the filled area within 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 offers superior fire resistance compared to resin-based fillers.

The extension member 2 is preferably embedded in the filler material 6. This allows the plate member 3 to be fixed to the beam 1 via the extension member 2 and the filler material 6.

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.

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 sides 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 a stiffener fixed between the web 11 and the flanges 12, 13 with nails, screws, screws, tackers, etc., to cover the beam 1.

The fire-resistant covering plate 38 is a plate-shaped covering material that covers the underside 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, or tackers.

As shown in Figures 2 and 7, if 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, 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 abut against the lower surface of the plate member 3. In this case, the end surface of the fire-resistant covering plate 38 closest to the beam 1 may be abutted against the plate surface of the fire-resistant covering plate 81, eliminating any area between the fire-resistant covering plate 38 and the fire-resistant covering plate 81 where no fire-resistant covering material exists.

The thickness of the fire-resistant covering plate 8 and the fire-resistant covering plate 38 needs only to be 20 mm or more and 40 mm or less, for example, 25 mm or 35 mm. If a fire were to break 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 in the beam 1, thereby suppressing the temperature rise in 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 very thick (for example, it does not need to be thicker than 40 mm) to achieve sufficiently high fire resistance.

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 Figure 2 and elsewhere includes the steps of placing the frame material 7 on the top surface of the beam 1, placing the plate member 3 on the top surface of the frame material 7 to separate the beam 1 from the plate member 3, and filling the frame of the frame material 7 with the filler material 6.

For example, in a construction method for the fire-resistant structure 100, a frame material 7 may be placed on the top surface of the beam 1, and then a plate member 3 having a first through hole 4 may be placed on the top surface of the frame material 7 to separate the beam 1 and the plate member 3. Then, filler material 6 may be used to fill the first through hole 4 and the second through hole 74 within the frame of the frame material 7 via the first through hole 4, thereby constructing the fire-resistant structure 100. When the frame material 7 is plate-shaped, the bottom surface of the frame material 7 is aligned with the top surface of the beam 1, and the top surface of the frame material 7 is aligned with the bottom surface of the plate member 3. In this case, it is advisable to adjust the position of the frame material 7 so that the first through hole 4 and the second through hole 74 overlap when viewed from above.

If the filler material 6 is grout, the grout has sufficient fluidity before hardening, so by pouring the pre-hardened grout through the first through hole 4 into the second through hole 74, the first through hole 4 and the second through hole 74 can be filled with the filler material 6.

When placing the frame material 7 on the top surface of the beam 1, adhesive may be used to temporarily secure the frame material 7 to the beam 1, if necessary. By applying adhesive between the frame material 7 and the beam 1 and temporarily securing the frame material 7 to the beam 1, it is possible to prevent the frame material 7 from shifting in position when it is placed on the top surface of the beam 1, or when the plate member 3 is placed on top of the frame material 7.

When placing the frame material 7 on top of the beam 1, it is recommended that the side of the frame material 7 (the side facing outward in the width direction when viewed from the beam 1) be flush with the end face of the side of the beam 1 (the end faces of the flanges 12, 13, the outer end faces in the width direction). This allows the side of the frame material 7 to be covered with the same fire-resistant covering plate 81 all the way to the end face of the side of the beam 1.

The following describes a variation of the embodiment described above.

(Variation 1)
In the above embodiment, as shown in Figures 1 and 2, the frame member 7 is a flat, rectangular member in top view, 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. Also, as shown in Figures 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 Figure 5 shows a view of the frame member 7 from above (top view). Figure 6 shows a view of the frame member 7 from a side.

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

As shown in Figures 8 to 10, multiple frame materials 7 (three in the example shown in Figure 8) may support the end 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 in 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 is flush with the end faces of the side portions of the beam 1 (end faces of the flanges 12, 13).

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

As shown in Figures 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 Figure 10 has two second through holes 74 arranged in a row along the longitudinal direction of the frame material 7, but as shown in Figure 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.

(Variation 2)
In the above embodiment, as shown in Fig. 2, the frame material 7 is disposed along the underside of the plate member 3, and the frame material 7 is disposed 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.

Note that Figure 11 shows a view of the fire-resistant structure 100 according to Modification 2 as seen from above. Figure 12 shows a cross-sectional view of the fire-resistant structure 100 according to Modification 2 as seen from the side (horizontally). Figure 12 is a cross-sectional view taken along the arrows XII-XII in Figure 11. Figure 12 illustrates an example in which the bottom surfaces of the plate member 3 and the frame member 7 are flush with each other. Figure 13 is a view of the plate member 3 with a recess formed therein as seen from the side along the end surface of the end portion 30.

As shown in Figures 12 and 13, the recess 37 may be formed by cutting out a portion of the underside of the end portion 30 of the plate member 3.

Note that Figure 12 shows an example in which 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 and 13) are flush with each other.

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).

(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.

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

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

In this case, the frame material 7 (frame material 7A) may have three second through holes 74 formed along its longitudinal direction, as shown in FIG. 16. The frame material 7 may be placed on the beam 1 with its 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, as in the example in Modification 2.

(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 first through hole 4 and the second through hole 74 within the frame of the frame material 7 with the filler material 6 through the first through hole 4. In other words, the frame material 7 and the plate member 3 are separately placed on the beam 1 (in this order). However, the frame material 7 may be previously incorporated into the plate member 3.

Figures 17 and 18 show an example of a panel material 300 in which a frame material 7 has already been assembled into a plate member 3. The panel material 300 is a plate unit in which the frame material 7 has been fitted into a recess 37 formed in the plate member 3. In the panel material 300, as an example, the underside of the plate member 3 and the underside of the frame material 7 are flush with each other. Note that Figure 17 shows, as an example, a panel material 300 in which the frame material 7A exemplified in Variation 3 above is attached to the plate member 3. Furthermore, Figure 18 shows, as another example, a panel material 300 in which the frame material 7 shown in Figures 1, 2, 5, and 6 of the above embodiment is attached to the plate member 3.

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 member 7 fitted into the recess 37, the plate member 3 having a first through hole 4 formed through its plate surface, the frame member 7 being made of lightweight aerated concrete and having a second through hole 74 formed through its plate surface, and the first through hole 4 and the second through hole 37 may overlap when viewed from above.

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 top 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.

The panel material 300 can be pre-assembled in a factory or other facility. Then, at the building construction site, the fire-resistant structure 100 and floor section A (see Figures 3 and 4) can be constructed using the panel material 300.

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

[Another embodiment]
(1) In the above embodiment, it has been described 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 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 through the frame material 7 and into the filler material 6.

If the frame material 7 is made of ALC with internal reinforcing bars, the fasteners 86 that secure the fire-resistant covering plate 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).

(2) In the above embodiment, as shown in Figures 2, 7, 9, and 12, an example was described 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 in the fire-resistant structure 100. 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 when viewed from above. In other words, the area of the frame material 7 located on the opposite side of the end 30 (edge) of the plate member 3 when 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.

As shown in Figure 20, in the fire-resistant structure 100, the end of the side of the frame material 7 (the side facing the plate member 3) may extend to the outside of the beam 1 (flange 12) in a top view, i.e., to the outside of the beam 1, so that the frame material 7 protrudes from the beam 1. If the frame material 7 is fitted into the recess 37 formed in the plate member 3 and the underside of the plate member 3 and the underside of the frame material 7 are flush with each other, even if the frame material 7 protrudes from the beam 1 in a top view, the frame material 7 will not cause a three-dimensional obstruction when the side of the beam 1 is covered with a fire-resistant covering plate 81.

When the fire-resistant structure 100 is constructed so that the side edges of the frame material 7 extend beyond the beams 1 when viewed from above, causing the frame material 7 to protrude beyond the beams 1, the fire-resistant covering plate 38 may be arranged to abut against the underside of the frame material 7. In other words, when the frame material 7 protrudes beyond the beams 1, extending beyond the side edges of the frame material 7, 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.

Constructing the fire-resistant structure 100 so that the side ends of the frame material 7 extend beyond the beam 1 when viewed from above and the frame material 7 protrudes from the beam 1 may better suppress heat conduction between the beam 1 and the plate member 3.

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 the frame material 7 extends beyond 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, which may make the fire-resistant structure 100 a stronger connecting structure.

(3) In the above embodiment, as shown in Figure 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 when viewed from above, with one or more second through holes 74 formed as the space (opening) 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 board, with one or more second through holes 74 formed so as to penetrate the board surface. However, the frame material 7 is not limited to a case in which the opening within the frame is a second through hole 74.

Figures 21, 22, and 23 show an example in which the frame material 7 does not have second through holes 74 (see Figure 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 within the frame 70. Figure 21 is a top view of the fire-resistant structure 100 of this example. Figure 22 shows a cross-sectional view of the fire-resistant structure 100 of this example as viewed from the side (cross-sectional view taken along arrows XXII-XXII in Figure 21). Figure 23 is a top view of the frame material 7.

In this case, the frame material 7 may be placed on the top surface of the beam 1, and then the plate member 3 having the first through hole 4 may be placed on the top surface of the frame material 7 to separate the beam 1 and the plate member 3. After that, the filler material 6 may be filled through the first through hole 4 into the first through hole 4 and into the space within the opening 75 within the frame of the frame material 7 (frame 70), thereby constructing the fire-resistant structure 100.

(4) In the above embodiment, as shown in Figure 2 and other figures, a case has been described in which the first through hole 4 and the second through hole 74 within the frame of the frame material 7 are filled with the filler material 6 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 cases in which the opening portion within its frame is the second through hole 74.

Figures 24 and 25 show an example in which the plate member 3 does not have a first through hole 4, and the frame material 7 does not have a second through hole 74 (see Figure 2) formed in the plate surface, but rather has a frame 70 (see Figure 23) formed in a rectangular shape when viewed from above. A rectangular opening 75 is formed within the frame 70. Figure 24 is a top view of the fire-resistant structure 100 of this example. Figure 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 Figure 24).

In this case, the fire-resistant structure 100 may be constructed using 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 into the frame (opening 75) of the frame material 7, 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.

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

(5) In the above embodiment, as an example of a construction method for the fire-resistant structure 100 shown in FIG. 2 and other figures, 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 fills the first through hole 4 and the second through hole 74 within the frame of the frame member 7 with filler material 6 via the first through hole 4 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 without a first through hole 4 on the top surface of the frame member 7 to separate the beam 1 and the plate member 3, then forming a first through hole 4 in the plate member 3, and filling the first through hole 4 and the second through hole 74 within the frame of the frame member 7 with filler material 6 via the formed first through hole 4.

(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.

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 can be screwed into the frame material 7 from the underside of the frame material 7 or inserted into the frame material 7 to secure it to the plate member 3. In other words, the fasteners 73 can be passed through the frame material 7 and into the plate member 3 to secure the frame material 7 to the plate member 3. Note that Figure 26 is a view of the plate member 3 and frame member 7 from below. Figure 27 is a view of the plate member 3 and frame member 7 from the end face side of the end portion 30 of the plate member 3.

Such a fastener 73 may be arranged, for example, near the second through hole 74 in the frame material 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 material 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.), with the center of the second through hole 74 as the center of symmetry. This allows the frame material 7 to be firmly fixed to the plate member 3.

If the frame material 7 is made of ALC with internal reinforcing bars, the fasteners 73 that secure the frame material 7 to the plate member 3 may be positioned (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).

(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 stronger connecting structure. The reinforcing plate may be, for example, a metal plate (strip-shaped metal).

(8) In the above embodiment, the fire-resistant structure 100 was described with an example in which the fire-resistant covering plates 8 and 38 covering the beams 1 and plate members 3 were plate-shaped covering materials made of fire-resistant materials. 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.

(9) In the above embodiment, as shown in FIG. 2 and elsewhere, 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 positioned 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, an example has been given in which the second through hole 74 and the first through hole 4 are circular and have the same diameter, with their centers overlapping in a top view.

However, the second through hole 74 and the first through hole 4 are not limited to having roughly the same shape when viewed from above. The second through hole 74 and the first through hole 4 may have different shapes or different diameters when viewed from above. 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.

Furthermore, the centers or centers of gravity of the second through hole 74 and the first through hole 4 do not need to overlap when viewed from above; their centers or centers of gravity may be in different positions when viewed from above. It is sufficient that the second through hole 74 and the first through hole 4 have a portion of their respective holes (opening portions) overlap.

(10) In the above embodiment, it was explained 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 was also explained that the second through hole 74 may be circular or rectangular when viewed from above, and Figure 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.

The second through hole 74 may be, for example, oval in top view, as shown in Figures 28 and 29. Note that Figure 28 is a top view of a frame material 7 in which the second through hole 74 is oval. Figure 29 is a side view of this frame material 7.

As shown in Figures 28 and 29, when the second through hole 74 has an oval shape when viewed from above, the longitudinal direction of the second through hole 74 when viewed from above may be arranged along the longitudinal direction of the frame material 7 or along a direction intersecting the longitudinal direction of the frame material 7.

When the second through hole 74 has an oval shape in top view, as shown in FIG. 30 , the second through hole 74 may overlap two or more first through holes 4 in top view. By overlapping two or more first through holes 4 in this way, for example, when constructing a 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 framing material 7 via the first through hole 4 as described in the above embodiment, the effort required for filling the filler material 6 may be reduced. Specifically, for example, if the filler material 6 is grout, pre-hardened grout has sufficient fluidity. Therefore, by filling the filler material 6 into a second through hole 74 that overlaps with a certain first through hole 4 in top view (by pouring pre-hardened grout) via the first through hole 4, 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.

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 modified in ways other than those shown in Figure 28.

For example, as shown in Figure 31, in the frame material 7, multiple second through holes 74 (two in Figure 31) may be arranged so that their longitudinal direction is aligned only along the longitudinal direction of the frame material 7. Note that Figure 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.

Also, as shown in FIG. 32, only one second through hole 74 may be arranged in the frame material 7, with its longitudinal direction aligned only along the longitudinal direction of the frame material 7. In this case, as shown in FIG. 33, when the frame material 7 is placed on the beam 1, the second through hole 74 in the frame material 7 may be arranged so that its longitudinal direction is aligned with the width direction of the beam 1.

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.

(11) In the above embodiment, it was explained 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. Figure 5 illustrates an example in which six second through holes 74 are formed in the frame material 7. The second through holes 74 shown in Figure 5 are not connected to adjacent second through holes 74, but the second through holes 74 may be connected to adjacent second through holes 74 as shown in Figures 34 and 35.

Figure 34 is a top view of a frame material 7 in which a second through hole 74 is connected to an adjacent second through hole 74. Figure 35 is a side view of this frame material 7. Figures 29 and 30 illustrate a case in which adjacent second through holes 74, 74 in the longitudinal direction of the frame material 7 are connected to each other by a connecting groove 79, which is a groove formed on the back side of the frame material 7. Note that the back side of the frame material 7 refers to the surface of the frame material 7 facing the beam 1 when the frame material 7 is placed on the beam 1 (see Figure 2, etc.).

In this way, adjacent second through holes 74, 74 are connected to 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 first through hole 4 and a second through hole 74 within the frame material 7 with filler material 6 via the first through hole 4 as described in the above embodiment, if filler material 6 is filled via a first through hole 4 into a second through hole 74 that overlaps with the first through hole 4 in a top view, as shown in FIG. 36 , it may be possible to fill another second through hole 74 that communicates with the second through hole 74 via the communicating groove 79 with filler material 6. If the filler material 6 is grout, because grout before hardening has sufficient fluidity, it may also be possible to fill another first through hole 4 that overlaps with the second through hole 74 in a top view with filler material 6 via the second through hole 74.

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

Such frame material 7 may be a single piece, or may be formed by arranging or stacking ALC boards or ALC blocks, for example. If the frame material 7 is, for example, frame 70 (see Figure 23), frame 70 may be formed by arranging ALC boards or ALC blocks in a rectangular shape (rectangular ring) when viewed from above.

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

Multiple slice plates 15 are used (e.g., six), each fixed to the beams 1, 1 by bolts 19 or the like.

Figure 37 is a side view (across the direction of extension of beam 1) of frame material 7 on beams 1, 1 (on flanges 12, 12). Figure 38 is a top view (top view) of frame material 7 on flanges 12, 12 (see Figure 37).

Figures 37 and 38 show an example in which part of the frame 70 is placed on the slice plate 15. This frame 70 is composed of plate-shaped frame members 72, 72 (see Figure 38) and block-shaped frame members 71, 71 placed on the flange 12.

The plate frame members 72, 72 are placed only on the slice plate 15, and the plate surfaces are arranged parallel to each other.

The block-shaped frame members 71, 71 are positioned in contact with the ends of the plate frame members 72, 72 in the extension direction of the beam 1 (the ends closest to the block-shaped frame members 71, 71) and the ends of the slice plates 15 in the extension direction of the beam 1 (similarly, the ends closest to the block-shaped frame members 71, 71).

The frame 70, surrounded by the plate frame members 72, 72 and the block-shaped frame members 71, 71, may have, for example, a rectangular opening 75 formed within it. Plate members 3 (see Figure 37) may be placed on such a frame 70 to separate the beams 1 from the plate members 3, and the openings 75 may be filled with filler material 6 (see Figure 25, etc.) to construct a fire-resistant structure 100.

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

Multiple slice plates 12 are used (e.g., six), each fixed to the beams 1, 1 by bolts 19 or the like.

Figure 39 is a side view (across the direction of extension of the beam 1) of the frame material 7 on the beams 1, 1 (on the flanges 12, 12). Figure 40 is a top view (top view) of the frame material 7 on the flanges 12, 12.

One beam 1 is supported by a column 9.

Figures 39 and 40 show an example in which part of the frame 70 is placed on the slice plate 15. This frame 70 is composed of plate-shaped frame members 72, 72 (see Figure 40) and block-shaped frame members 71, 71 placed on the flange 12.

The plate frame members 72, 72 are arranged in an area that extends from above the flange 12, over the slice plate 15, and onto the adjacent flange 12, with the plate surfaces arranged parallel to one another.

As shown in Figure 39, the lower end of the plate frame member 72 has a recess 72a formed therein into which the slice plate 15 fits. 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.

As shown in Figures 39 and 40, the block-shaped frame members 71, 71 are positioned so as to abut against the ends (ends closest to the block-shaped frame members 71, 71) of the plate frame members 72, 72 (see Figure 40) in the extension direction of the beam 1. These block-shaped frame members 71, 71 are spaced apart from the slice plate 15.

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 member 3 may be placed on such a frame 70 to separate the beam 1 from the plate member 3 (see Figure 40), and the opening 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. However, a fire-resistant structure that separates the beams from the plate members can be achieved with a simple structure in which a frame is formed around the uneven areas and filler material is filled into the opening.

Although not shown, when pillars 9 are placed close to the slice plate 15 as in Figures 39 and 40, the block-shaped frame member 71 on the side close to the pillar 9 may be omitted, and the ends of the plate frame members 72, 72 on the side close to the pillar 9 may be abutted against the pillar 9. In this case, the space enclosed by the block-shaped frame member 71, plate frame members 72, 72, and pillar 9 may be filled with filler material 6 (see Figure 25, etc.).

(12) In the above embodiment, the panel material 300 is described as a plate unit in which the frame material 7 is fitted into the recess 37 formed in the plate member 3. It was also 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.

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 position of the extension member 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 member to be used as the frame member 7 in advance, but may be formed in the member to be used as the frame member 7 at the construction site to match the position of the extension member 2, and the panel material 300 may be completed at the construction site.

Please note that the embodiments disclosed in this specification are merely examples, and the embodiments of the present disclosure are not limited to these, and may be modified as appropriate within the scope of the purpose of the present disclosure.

This disclosure is applicable to fire-resistant structures, panel materials, and construction methods for fire-resistant structures.

1: Beam 10: End 100: Fire-resistant structure 11: Web 12: Flange 13: Flange 15: Slice plate 19: Bolt 2: Extension member 3: Plate member 3A: Plate member 3B: Plate member 30: End 300: Panel material 37: Recess 38: Fire-resistant covering plate 4: First through hole 6: Filler material 7: Frame material 70: Frame 71: Plate-shaped frame member 72: Block-shaped frame member 72a: Recess 73: Fixing device 74: Second through hole 75: Frame opening 79: Connecting groove 8: Fire-resistant covering plate 81: Fire-resistant covering plate 82: Fire-resistant covering plate 86: Fixing device 9: Column A: Floor portion

Claims (10)

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. 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. 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. The fire-resistant structure described in claim 3, wherein the frame material is a fire-resistant covering plate. The fire-resistant structure described in claim 3, wherein the frame material is made of lightweight aerated concrete. 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. 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. 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. 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. 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.