JP7243008B2 - Buildings and building construction methods - Google Patents

Description

The present invention relates to a building and a construction method for the building.

Patent Literature 1 discloses a technique related to a frame structure of a steel frame building. In this prior art, a steel-framed building has a plurality of structural units each composed of a steel-framed column and a steel-framed beam that are pin-connected with a steel-framed beam. Each frame unit has a structure in which a main frame and a sub-frame are pin-joined by steel beams for intra-unit connection.

Patent Literature 2 discloses a technique related to a frame structure of a building. In this prior art, steel frame reinforced concrete frame units are distributed in two horizontal directions every two spans in a steel rigid frame frame. In addition, the steel reinforced concrete frame units are joined by steel beams.

JP-A-9-209448 JP 2005-226349 A

In Patent Literature 1, the steel frame columns of the frame unit are pin-joined by steel frame beams, which are large girders. In each frame unit, the main frame and the sub-frame are pin-joined by steel beams, which are large beams for intra-unit connection.

In addition, in Patent Document 2, steel-reinforced concrete frame units are distributed in two horizontal directions in a steel rigid-frame frame, and the steel-framed reinforced concrete frame units are joined by steel beams, which are large girders.

In this way, frame units and steel-framed reinforced concrete frame units are connected by steel beams, which are large girders. Therefore, there is room for improvement from the viewpoint of improving workability, such as the time and effort required to join steel beams, which are large girders.

SUMMARY OF THE INVENTION In view of the above facts, an object of the present invention is to improve the workability of a building having steel columns and steel beams.

A first aspect is a building comprising a plurality of self-supporting structures arranged side by side at intervals and having steel columns and steel beams, and a concrete slab spanned between the adjacent structures. be.

In the first aspect, a plurality of self-supporting structures having steel columns and steel beams are arranged side by side at intervals, and concrete slabs are spanned between adjacent structures. Since concrete slabs are spanned between adjacent structures in this manner, there is no need to connect structures with girders. Therefore, workability is improved.

A second aspect is the steel-frame building of the first aspect, wherein, in a plan view, the outer end of the concrete slab is located inside the outer surface of the steel column arranged outside the structure. .

In the second aspect, the outer edge of the concrete slab between the structures of the building is located inside the outer surface of the steel column installed outside the structure. Therefore, an inwardly recessed stepped portion is formed between structures in a building, and the stepped portion between the structures can be used, for example, as a passive facade that takes in natural light indoors while suppressing solar radiation load.

A third aspect includes a first step of constructing or installing self-supporting structures having steel columns and steel beams at intervals, and a second step of spanning concrete slabs between the adjacent structures. It is a construction method of a building equipped with

In a third aspect, a plurality of self-supporting structures having steel columns and steel beams are constructed or installed at intervals. Concrete slabs are spanned between adjacent structures, and the structures are not joined by girders, improving workability.

A fourth aspect is the building construction method of the third aspect, wherein in the first step, the structures are constructed or installed sequentially from one side of the site toward the other side.

In the fourth aspect, by constructing or installing the structure sequentially from one side of the site to the other side, for example, construction on a long and narrow site or a curved site becomes easier, and construction on such a site Efficiency is improved and the construction period can be shortened.

ADVANTAGE OF THE INVENTION According to this invention, the workability of the building which has a steel-frame beam and a steel-frame beam can be improved.

1 is a perspective view of a structure that constitutes a building; FIG. It is the elevation view seen from the Y direction which shows the internal structure of a building typically. 3 is a horizontal cross-sectional view taken along line 3-3 of FIG. 2; FIG. It is the elevation view seen from the Y direction which shows the exterior of a building typically. 5 is a horizontal cross-sectional view taken along line 5-5 of FIG. 4; FIG. It is a process chart showing the construction process of the building in order from (A) to (D).

<Embodiment>
A building of one embodiment of the present invention will be described. Note that the two orthogonal horizontal directions are the X direction and the Y direction, which are indicated by arrows X and Y, respectively. A vertical direction orthogonal to the X direction and the Y direction is defined as a Z direction and indicated by an arrow Z. As shown in FIG. 3 is a horizontal cross-sectional view along line 3-3 in FIG.

[structure]
First, the structure of the building of this embodiment will be described.

A building 10 (see also FIG. 4) of the present embodiment shown in FIG. 3 has a rectangular shape elongated in the X direction in plan view. The site S on which the building 10 is constructed also has a rectangular shape elongated in the X direction in a plan view.

As shown in FIGS. 2 and 3, the building 10 of the present embodiment includes three or more structural bodies 100 arranged in a line at intervals in one direction, which is the X direction in the present embodiment, and adjacent structures 100. and a connecting slab 200 spanned between the bodies 100 . In addition, in the present embodiment, the structures 100 are arranged at regular intervals except for the intermediate portion 12 in the X direction of the building 10 . Moreover, although the building 10 of this embodiment has a three-layer structure, it is not limited to this.

As shown in FIG. 1 , the structure 100 has a self-supporting Rahmen structure having steel columns 110 and steel beams 120 . In addition, the structure 100 has rigidity and strength to resist by itself in the X and Y directions when a disturbance such as an earthquake acts.

In this embodiment, steel columns 110 are provided at the corners of the rectangular shape in plan view, and steel beams 120, which are large girders, are joined to these steel columns 110. As shown in FIG. Therefore, the steel beams 120 are arranged in a rectangular frame shape in plan view. In addition, as described above, in this embodiment, the building 10 (see FIG. 2) has a three-layer structure, so the steel beams 120 are spaced vertically accordingly (see also FIG. 2).

As shown in FIGS. 2 and 3 , a connection slab 200 as an example of a concrete slab is spanned between steel beams 120 of the structure 100 .

As shown in FIGS. 3 and 5 , in plan view, the outer end 202 of the connecting slab 200 is located inside (inside the building 10) the outer surface 112 of the steel column 110 of the structure 100. . Note that, in this embodiment, no small girders are spanned between the steel frame girders 120 of the adjacent structures 100 . In addition, although the connection slab 200 of the present embodiment is constructed by placing concrete on the steel deck formwork, it is not limited to this.

In each structure 100 , an intra-structure slab 150 is supported by the steel beams 120 . In addition, in this embodiment, no small girders are spanned between the steel beams 120 in the structure 100 . In addition, the intra-structural slab 150 of the present embodiment is also constructed by pouring concrete on the steel deck formwork, but it is not limited to this.

As described above, the outer ends 202 of the connecting slabs 200 between the structures 100 in the building 10 shown in FIG. In addition, no girders joined to the steel columns 110 are provided between the structures 100 . Therefore, an inwardly recessed stepped portion 18 is formed between the structures 100 in the building 10 .

As shown in FIG. 4, the side portion of the structure 100 on the outer wall of the building 10 of this embodiment is composed of the precast concrete plate 20, and the side portion between the structures 100 on the outer wall (the step portion 18 (see FIG. 5)) is composed of a curtain wall 30 .

As described above, the inwardly recessed step portion 18 is formed between the structures 100 in the building 10 shown in FIG. Therefore, the horizontal cross-sectional shape of the precast concrete plate 20 is substantially U-shaped. Further, in this embodiment, the curtain wall 30 is a large opening for natural ventilation, and a louver 32 is provided in the middle portion in the X direction with the plate thickness direction in the X direction.

[Construction method]
Next, a method for constructing the building 10 of this embodiment will be described. Note that the right side in the X direction in each drawing is the back side, and the left side is the front side.

As shown in order from FIG. 6(A) to FIG. 6(D), the structures 100 are constructed sequentially from the back side of the site S to the front side at intervals. Then, the connection slab 200 is stretched between the structures 100 from the back side to the front side. In addition, the slab 150 (see FIGS. 3 and 5), the precast concrete plate 20, the curtain wall 30, and the like are installed from the back side to the front side.

In addition, in this embodiment, the structure 100 and the structure 100 are joined by a temporary steel beam (not shown) at the time of construction. These temporary steel beams will be removed as appropriate as the construction progresses. Therefore, when the building 10 is completed, all the temporary steel beams have been removed.

In addition, in this embodiment, the temporary steel beams are joined at the time of construction, but they may not be joined if unnecessary. Moreover, in this embodiment, all the temporary steel beams were removed, but some of the temporary steel beams may remain. For example, the temporary steel beams may be removed in areas where the ceiling cannot be installed, and the temporary steel beams may be left in areas where the ceiling is hidden.

[Action and effect]
Next, the operation and effects of this embodiment will be described.

In the building 10, a plurality of self-supporting Rahmen structures 100 composed of steel columns 110 and steel beams 120 are arranged side by side at intervals in the Y direction, and adjacent structures 100 are connected. A slab 200 is spanned. Since the connecting slab 200 is spanned between the adjacent structures 100 in this way, there is no need to connect the structures 100 with the steel beams 120 that are large girders, that is, there is no steel beam 120 between the structures 100. . Therefore, the number of welded portions and bolted portions of the steel beams 120, which are large girders, is reduced, thereby improving workability and shortening the construction period.

Since the structures 100 are not joined by the steel beams 120, which are large girders, the intervals between the structures 100 can be easily changed, and the degree of freedom in design is large. In addition, during construction, the space between the structures 100 that are not joined by the steel beams 120, which are large girders, is used as a buffer space for construction accuracy control, thereby improving construction efficiency and shortening the construction period. can be done.

In addition, by constructing the structure 100 sequentially from the back side to the front side of the long and narrow site S and evacuating from the building, construction on the long and narrow site S is facilitated, and construction efficiency on the long and narrow site S is improved. , the construction period can be shortened.

In addition, the side portion of the structure 100 in the outer wall of the building 10 of the present embodiment is the precast concrete plate 20, and the side portion between the structures 100 in the outer wall is the curtain wall 30. It has an external appearance that achieves both (precast concrete plate 20) and openness (curtain wall 30).

Since the stepped portion 18 between the structures 100 in the room of the building 10 of this embodiment does not have the steel beams 120 that are large beams, the curtain wall 30 is used as a large natural ventilation window to effectively take in natural light into the room. , the stepped portion 18 and the louvers 32 in the intermediate portion prevent direct sunlight from entering the room. In other words, the space between the structures 100 serves as a passive facade that allows natural light into the room while suppressing the solar radiation load.

In addition, the wall side (precast concrete plate 20 side) of the structure 100 interior part in the room of the building 10 of this embodiment is utilized as equipment space (pipe space etc.) and storage space (high cabinet etc.).

<Others>
It should be noted that the present invention is not limited to the above embodiments.

For example, in the above-described embodiment, small beams are not joined between the large steel beams 120, but the present invention is not limited to this. Small beams may be joined between the steel beams 120 . A "large beam" is a beam that is joined to a column, and a "small beam" is a beam that is spanned over and joined to a large beam.

Further, for example, in the above-described embodiment, the structural body 100 has the steel columns 110 arranged at the corners of the rectangular shape in plan view, but the present invention is not limited to this. From another point of view, the structure 100 has four steel columns 110, but is not limited to this. The structure 100 may have five or more steel columns 110 . For example, the structure 100 may include three steel columns 110 spaced apart in the Y direction and have six steel columns 110 as a whole.

Further, for example, in the above embodiment, the structure 100 has a Rahmen structure, but it is not limited to this. For example, it may be a brace structure.

Further, for example, in the above-described embodiment, the site S has a long and narrow rectangular shape, and the structures 100 are constructed in a straight line from the back side to the front side of the long and narrow site S, but the present invention is not limited to this. . For example, the site is L-shaped, S-shaped, or U-shaped in plan view, and the structures 100 are arranged in an L-shaped, S-shaped, or U-shaped from one side of the site to the other side. You may That is, the plan view shape of the site and building may be L-shaped, S-shaped, or U-shaped. Also, the shape of the site and the shape of the building in plan view may be different. For example, an L-shaped, S-shaped, or U-shaped building may be constructed on a site that is rectangular in plan view.

Also, although the structure 100 is built sequentially from one side of the site to the other side, the present invention is not limited to this. For example, the structure 100 may be constructed from one side and the other toward the middle portion between one side and the other side of the site, and the two may be joined at the middle portion. Alternatively, the structure 100 may be constructed from the middle to one side and the other.

Further, for example, in the above-described embodiment, the structures 100 are constructed at intervals on the site S, but the present invention is not limited to this. The structure 100 may be constructed in an assembly yard within the site or in a factory outside the site, and then moved from there to be installed at a desired location with an interval.

Furthermore, various aspects can be implemented without departing from the gist of the present invention.

REFERENCE SIGNS LIST 10 building 100 structure 110 steel column 112 outer surface 120 steel beam 200 connecting slab (an example of a concrete slab)
202 outer end
S site

Claims (5)

a self-sustaining structure in which steel beams arranged in a rectangular frame shape are joined to four steel columns arranged at three or more spaced apart corners in plan view at the corners of the rectangle ;
a concrete slab in a structure spanned without providing a small beam between the steel beams of the structure ;
a connecting concrete slab spanned between the steel beams between the adjacent structures;
a building with In a plan view, the outer ends of the connecting concrete slabs are located inside the outer surfaces of the steel columns arranged outside the structure,
A building according to claim 1. The outer wall is
A precast concrete plate having a U-shaped horizontal cross section that constitutes the side portion of the structure;
a curtain wall forming between the structures;
have,
A building according to claim 2. The connected concrete slabs are constructed by placing concrete on a steel deck formwork that spans between the adjacent structures.
The building according to any one of claims 1 to 3 The building construction method according to any one of claims 1 to 4,
A first step of constructing or installing three or more self-supporting structures having steel columns and steel beams at intervals from one side of the site to the other side;
a second step of successively spanning the connected concrete slabs from the one side toward the other side between the adjacent structures;
construction method of a building with

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