JP7120700B2 - Structure - Google Patents

Description

The present invention relates to structures.

Composite structures are known in which different structures (for example, reinforced concrete, reinforced steel concrete, steel frame, etc.) are adopted for the low-rise part and the high-rise part (see, for example, Patent Documents 1 to 3).

JP 2008-255605 A JP-A-2003-313952 Japanese Patent Application Laid-Open No. 2002-004628

By the way, it is conceivable to use the lower part of a structure such as a hotel or collective housing as a store, and the upper part of the structure as an event hall or the like.

Here, livability is required in hotels, collective housing, and the like. On the other hand, stores and event halls require large spaces. Accordingly, construction of such mixed-use structures can be costly.

In addition, a steel frame structure may pose a problem of shaking during an earthquake.

An object of the present invention is to reduce the construction cost of a multi-use structure while ensuring seismic performance in consideration of the above facts.

The structure according to the first aspect comprises a middle-layer section of reinforced concrete, steel-reinforced concrete, or a composite structure of reinforced concrete and steel-reinforced concrete, a steel-framed low-layer section provided below the middle-layer section, and the middle-layer section. and a high-rise part of steel frame structure provided on the upper part, and a damping device provided in the high-rise part.

According to the structure according to the first aspect , the middle layer is made of reinforced concrete, steel-reinforced concrete, or a composite structure of reinforced concrete and steel-reinforced concrete.

Here, reinforced concrete structures and the like are superior to steel frame structures in terms of living performance such as vibration performance and sound insulation performance. In addition, reinforced concrete structures and the like can increase productivity when the same floor plan (column splitting) is repeated over multiple floors, such as in hotels and collective housing. Therefore, reinforced concrete structures are suitable for hotels and housing complexes.

Therefore, by using the middle layer of the structure as a hotel or collective housing, it is possible to reduce construction costs while ensuring livability.

On the other hand, the low-rise section provided under the middle-rise section is made of steel. Similarly, the high-rise section provided above the middle-rise section is made of steel.

Here, the steel frame structure makes it easier to widen the column span and secure a large space compared to the reinforced concrete structure and the like. Therefore, steel structures are suitable for shops, event halls, and the like.

Therefore, by constructing the low-rise part and the high-rise part of the structure with a steel structure, construction costs can be reduced while securing a large space.

By the way, if the high-rise part of the structure is made of steel, there is a possibility that shaking during an earthquake will become a problem.

As a countermeasure against this, in the present invention, a damping device is provided in the upper part of the structure. As a result, it is possible to efficiently reduce the shaking of the upper floors during an earthquake.

As described above, the present invention can reduce the construction cost of a multipurpose structure while ensuring seismic performance.

A structure according to a second aspect is the structure according to the first aspect , wherein the column span of the low-rise portion and the high-rise portion is wider than the column span of the middle-rise portion.

According to the structure of the second aspect , the pillar spans of the low-rise section and the high-rise section are wider than the pillar span of the middle-rise section. Thereby, a large space can be secured in the low-rise part and the high-rise part according to the purpose.

A structure according to a third aspect is the structure according to the first aspect or the second aspect , wherein at least one of the low-rise part and the high-rise part is provided with an atrium.

According to the structure according to the third aspect , at least one of the low-rise section and the high-rise section is provided with the atrium section. As a result, the applications of the low-rise part and the high-rise building can be expanded.

As described above, according to the structure according to the present invention, it is possible to reduce the construction cost of a multi-purpose structure while ensuring seismic performance.

1 is an elevational view of a structure according to one embodiment; FIG. 2 is an elevational view showing the first switching section shown in FIG. 1; FIG. 2 is an elevational view showing the second switching section shown in FIG. 1; FIG. 2 is a graph schematically showing horizontal displacement of the structure shown in FIG. 1 during an earthquake;

Hereinafter, a structure according to one embodiment will be described with reference to the drawings.

(Structure)
FIG. 1 shows a structure 10 according to this embodiment. The structure 10 employs a seismic isolation structure. This structure 10 comprises a lower structure 12 and an upper structure 14 .

(lower structure)
The lower structure 12 is, for example, a foundation such as a foundation slab. An upper structure 14 is provided on the lower structure 12 . A seismic isolation layer 16 is formed between the lower structure 12 and the upper structure 14 . A plurality of seismic isolation devices 18 are installed on the seismic isolation layer 16 .

The seismic isolation device 18 is, for example, a laminated rubber bearing, a sliding bearing, or a rolling bearing. Through these seismic isolation devices 18, the upper structure 14 is supported by the lower structure 12 so as to be relatively displaceable in the horizontal direction. Note that the seismic isolation device 18 and the seismic isolation layer 16 can be omitted as appropriate.

(upper structure)
The upper structure 14 has a low layer section 30 , a middle layer section 50 and a high layer section 70 . The upper structure 14 is a compound-use structure (structure) in which the use of the middle layer section 50 and the use of the low layer section 30 and the high layer section 70 are different, or the middle layer section 50, the low layer section 30, and the high layer section 70 are each different in use. ).

The middle layer part 50 is made of reinforced concrete. On the other hand, the low-rise part 30 and the high-rise part 70 are made of steel. Therefore, a first switching layer 40 for switching the structural type (structural type) is provided between the steel-framed low-rise section 30 and the reinforced-concrete middle-rise section 50 . Similarly, a second switching layer 60 for switching the structural type (structural type) is provided between the reinforced concrete middle-layer section 50 and the steel-framed high-rise section 70 . Each configuration of the low layer section 30, the middle layer section 50, the high layer section 70, the first switching layer 40, and the second switching layer 60 will be described below.

(lower part)
The low-rise section 30 is composed of multiple layers (multiple floors), and is provided below the middle-rise section 50 described later. The low-rise section 30 includes, for example, a restaurant requiring a large space, a store selling clothing and miscellaneous goods, an event hall, and the like. Lower section 30 includes entrance 38 of structure 10 . The entrance 38 is a large space including an atrium 39 which will be described later.

The low-rise part 30 has a plurality of steel columns 32 and a plurality of steel beams 34 . As shown in FIG. 2, the steel column 32 has a concrete-filled steel pipe structure (CFT structure) in which a steel pipe 32A is filled with concrete 32B. In addition, the steel column may be formed of, for example, H-section steel, steel pipe, or the like. Moreover, the steel frame column in this embodiment is a concept including a concrete-filled steel pipe structure.

The steel beams 34 are made of, for example, H-shaped steel. The steel beams 34 are laid over a pair of adjacent steel columns 32 and together with the pair of steel columns 32 form a framework (framework). A floor slab 35 (see FIG. 2) is provided on the steel beams 34 .

As shown in FIG. 1, braces 36 are appropriately provided on the framework composed of the steel columns 32 and the steel beams 34 . In addition, the frame may be provided with an earthquake-resistant element such as an earthquake-resistant wall in addition to the brace. Also, the frame may be provided with various damping devices such as dampers.

Here, the low-rise part 30 is made of steel as described above. Therefore, the column span SL of the low-rise part 30 is easily made wider than the column span SM of the middle-rise part 50 made of reinforced concrete. Therefore, the pillar span SL of part of the low-rise section 30 is wider than the pillar span SM of the middle-rise section 50 .

The column span SL of the low-rise part 30 here means the interval between a pair of adjacent steel columns 32 . Similarly, the pillar span SM of the middle layer 50 means the distance between a pair of adjacent concrete pillars 52, which will be described later, and is the longest in the middle layer 50. FIG.

In addition, an atrium portion 39 is provided in the low-rise portion 30 . The blow-through portion 39 is formed over a plurality of layers of the low-layer portion 30 . In the atrium 39, no floor slab is provided between the adjacent floors, and the spaces of the adjacent floors are continuous in the vertical direction.

(middle section)
A middle layer portion 50 is provided on the lower layer portion 30 via a first switching layer 40 which will be described later. The middle layer section 50 is composed of multiple layers (multiple floors). The middle-rise section 50 includes, for example, guest rooms of a hotel where livability is required, and dwelling units of an apartment complex.

The middle layer section 50 has a plurality of concrete columns 52 and a plurality of concrete beams 54 . The concrete pillars 52 and the concrete beams 54 are made of, for example, reinforced concrete.

The concrete pillars 52 and the concrete beams 54 may be formed by a cast-in-place method, or may be formed by a precast method.

The concrete beams 54 are constructed between a pair of adjacent concrete pillars 52 , and together with the pair of concrete pillars 52 form a framework (framework). A floor slab (not shown) is provided on the concrete beams 54 . Note that the middle layer portion 50 of the present embodiment is not provided with an atrium portion.

(upper part)
A high layer section 70 is provided on the middle layer section 50 via a second switching layer 60 which will be described later. The high-rise section 70 is composed of multiple layers (multiple floors). Like the low-rise section 30, the high-rise section 70 is used as a restaurant that requires a large space, stores selling clothing and miscellaneous goods, and event halls.

The high-rise section 70 has a plurality of steel columns 72 and a plurality of steel beams 74 . The steel frame columns 72 are made of, for example, H-shaped steel, steel pipes, or the like. The steel column 72 may have a concrete-filled steel pipe structure in which a steel pipe is filled with concrete.

The steel beams 74 are made of, for example, H-shaped steel. The steel beams 74 are laid over a pair of steel columns 72 adjacent to each other, and together with the pair of steel columns 72 form a framework (framework). A floor slab (not shown) is provided on the steel beams 74 .

In addition, although the high-rise part 70 of this embodiment is not provided with the atrium part, the high-rise part 70 may be provided with the atrium part.

A vibration damping device 76 such as an oil damper or a steel material damper is appropriately provided on the frame composed of the steel columns 72 and the steel beams 74 . The frame may be provided with earthquake-resistant elements such as braces and earthquake-resistant walls. Moreover, it is sufficient that at least one damping device is provided in the high-rise section 70 .

Here, the high-rise section 70 is made of steel as described above. Therefore, the column span SH of the high-rise section 70 can be easily made wider than the column span SM of the middle-story section 50 made of reinforced concrete. Therefore, the column span SH of part of the high-rise section 70 is wider than the column span SM of the middle-level section 50 .

In addition, the column span SH of the high-rise part 70 here means the space|interval of a pair of steel-frame columns 72 which adjoin.

(first switching layer)
Next, the first switching layer 40 between the low-layer section 30 and the middle-layer section 50 will be described.

A first switching layer 40 is provided between the low-layer section 30 and the middle-layer section 50 . In the first switching layer 40 , the structure type (structure type) is switched from the steel-framed low-rise section 30 to the reinforced-concrete middle-layer section 50 . Also, the first switching layer 40 is used as a laying space (swinging space) for various facilities such as wiring, piping, and ducts.

FIG. 2 shows the first switching post 42 on the outer periphery of the first switching layer 40 as an example. The first switching column 42 is made of steel-reinforced concrete. The first switching column 42 has a concrete column portion 42A and a steel frame column portion 42B embedded in the concrete column portion 42A. The beam 43 of the first switching layer 40 is joined to the first switching column 42 . A floor slab 45 is provided on the beams 43 .

The steel-frame column portion 42B is erected on the column head of the steel-frame column 32 of the low-rise portion 30 so as to be continuous with the steel-frame column 32 . Like the steel column 32 , the steel column 42 B has a concrete-filled steel pipe structure and is joined to the column head of the steel column 32 . The steel column portion 42B is embedded in the concrete column portion 42A.

The concrete column portion 42A is made of reinforced concrete. A plurality of column main reinforcements 44 and a plurality of shear reinforcements 46 surrounding the plurality of column main reinforcements 44 are appropriately embedded in the outer peripheral portion of the concrete column portion 42A. In addition, in FIG. 2, the illustration of the plurality of shear reinforcing bars 46 is omitted as appropriate.

A concrete pillar 52 of the intermediate layer 50 is erected on the first switching pillar 42 . The concrete pillar 52 is made of precast concrete. This concrete column 52 has a plurality of column main reinforcements 56 .

In this embodiment, the material axis of the first switching column 42 and the material axis of the concrete column 52 of the middle layer portion 50 are misaligned, but the material axis of the first switching column 42 and the material axis of the concrete column 52 are not aligned. may match.

A plurality of column main reinforcements 56 are embedded in the outer periphery of the concrete column 52 . These column main reinforcements 56 extend downward from the lower surface of the concrete column 52 and are embedded in the concrete column portion 42A of the first switching column 42 . Also, the plurality of column main reinforcements 56 are embedded over substantially the entire length of the first switching column 42 . A part of the plurality of column main reinforcements 56 is arranged inside the steel pipe that constitutes the steel frame column portion 42B.

By embedding the column main reinforcements 56 of the concrete columns 52 of the middle layer 50 in the first switching columns 42 in this way, the concrete columns 52 of the middle layer 50 are attached to the steel columns 32 of the low layer 30 via the first switching columns 42 . It is connected.

(Second switching layer)
Next, the second switching layer 60 between the middle layer portion 50 and the high layer portion 70 will be described.

A second switching layer 60 is provided between the middle layer portion 50 and the high layer portion 70 . In the second switching layer 60, the structure type (structure type) is switched from the reinforced concrete middle layer section 50 to the steel frame high layer section 70. FIG. Also, the second switching layer 60 is used as a laying space (swinging space) for various facilities such as wiring, piping, and ducts.

FIG. 3 shows the second switching post 62 inside the second switching layer 60 . The second switching column 62 has a concrete column portion 62A and a steel frame column portion 62B embedded in the concrete column portion 62A. A beam 63 of the second switching layer 60 is joined to the second switching column 62 .

The steel column portion 62B is erected on the column head of the concrete column 52 of the middle layer portion 50 . Further, the column head of the steel-frame column portion 62B is joined to the column base portion of the steel-frame column 72 of the high-rise portion 70 . The steel column portion 62B is embedded in the concrete column portion 62A.

The concrete column portion 62A is made of reinforced concrete. In addition, a plurality of column main reinforcements 64 and a plurality of shear reinforcements 66 surrounding the plurality of column main reinforcements 64 are appropriately embedded in the outer peripheral portion of the concrete column portion 62A. The column main reinforcements 64 are connected to the column main reinforcements 56 of the concrete columns 52 of the middle layer portion 50 . In addition, in FIG. 3 , illustration of the plurality of shear reinforcing bars 66 is omitted as appropriate.

A steel frame column 72 of the high-rise section 70 is erected on the second switching column 62 . The column base of the steel column 72 is joined to the column head of the second switching column 62 . As a result, the steel columns 72 of the high-rise portion 70 are connected to the concrete columns 52 of the middle-rise portion 50 via the second switching columns 62 .

In the present embodiment, the material axis of the second switching column 62 and the material axis of the steel frame column 72 of the high-rise portion 70 match, but the material axis of the second switching column 62 and the material axis of the steel frame column 72 It doesn't matter if it's off.

(action)
Next, the operation of this embodiment will be described.

According to this embodiment, the middle layer part 50 of the structure 10 is made of reinforced concrete.

Here, reinforced concrete construction is superior to steel construction in terms of living performance such as vibration performance and sound insulation performance. In addition, reinforced concrete structures can increase productivity when the same floor plan (column splitting) is repeated over multiple floors, such as in hotels and collective housing. Therefore, reinforced concrete structures are suitable for hotels and housing complexes.

Therefore, as described above, by using the middle layer 50 of the structure 10 as a hotel or collective housing, it is possible to reduce construction costs while ensuring livability.

On the other hand, the low-rise section 30 provided under the middle-rise section 50 is made of steel. Similarly, the high-rise part 70 provided on the middle-rise part 50 is made of steel.

Here, compared with reinforced concrete construction, steel frame construction makes it easier to widen the column span and secure a large space. Therefore, steel structures are suitable for shops, event halls, and the like.

Therefore, by making the low-rise part 30 and the high-rise part 70 of the structure 10 steel-framed, construction costs can be reduced while securing a large space.

By the way, if the high-rise part 70 of the structure 10 is made of steel, there is a possibility that shaking during an earthquake will become a problem. FIG. 4 schematically shows the horizontal displacement of the structure 10 in the primary mode M1, secondary mode M2, and tertiary mode M3 during an earthquake. As shown in FIG. 4, in the structure 10, the horizontal displacement of the high-rise portion 70 is maximized in any of the primary mode M1, secondary mode M2, and tertiary mode M3.

As a countermeasure against this, in this embodiment, as shown in FIG. As a result, it is possible to efficiently reduce the shaking of the high-rise section 70 during an earthquake.

As described above, in this embodiment, the construction cost of the multi-purpose structure 10 can be reduced while securing seismic performance.

Further, the column span SL of part of the low-rise section 30 and the column span SH of part of the high-rise section 70 are wider than the column span SM of the middle-layer section 50 . Thereby, a large space can be secured in the low-rise section 30 and the high-rise section 70 according to the application.

Furthermore, the low-rise section 30 is provided with an atrium section 39 . Thereby, the application of the low-layer part 30 can be expanded.

In addition, by providing the first switching layer 40 in the structure 10, the structural form can be efficiently switched from the steel-framed low-rise section 30 to the reinforced-concrete middle-story section 50. FIG. Similarly, by providing the second switching layer 60 in the structure 10, the structural form can be efficiently switched from the middle layer section 50 of reinforced concrete construction to the high layer section 70 of steel frame construction.

Further, the first switching layer 40 and the second switching layer 60 are used as installation spaces (swinging spaces) for various facilities such as wiring, piping, and ducts. By consolidating the facilities in the first switching layer 40 and the second switching layer 60 in this way, the maintainability of the facilities is improved.

(Modification)
Next, a modification of the above embodiment will be described.

In the above-described embodiment, the column span SL of a part of the low-layer section 30 is wider than the column span SM of the middle-layer section 50, but the above-described embodiment is not limited to this. For example, the pillar span of at least a portion of the low-rise section may be wider than the pillar span of the middle-rise section. Also, the pillar span of the lower layer may be the same as or narrower than the pillar span of the middle layer.

Similarly, in the above embodiment, the column span SH of part of the high-rise section 70 is wider than the column span SM of the middle-level section 50, but the embodiment is not limited to this. For example, the column span of at least a portion of the upper layer may be wider than the column span of the middle layer. Also, the pillar span of the lower layer may be the same as or narrower than the pillar span of the middle layer.

Further, in the above embodiment, the low-rise part 30 is provided with the atrium part 39, but the above embodiment is not limited to this. The atrium part can be provided in at least one of the low-rise part and the high-rise part of the steel frame structure. Also, the blow-through portion can be omitted as appropriate.

Moreover, in the above-described embodiment, the middle layer portion 50 of the structure 10 is made of reinforced concrete, but the above-described embodiment is not limited to this. The middle-layer part 50 of the structure 10 may be, for example, a steel-reinforced concrete structure, or a composite structure of a steel-reinforced concrete structure and a steel-reinforced concrete structure.

Further, the uses of the low-rise section 30, the middle-rise section 50, and the high-rise section 70 are not limited to those described above, and can be changed as appropriate.

Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment and various modifications may be used in combination as appropriate. It goes without saying that various aspects can be implemented without departing from the scope.

10 Structure 30 Low-rise section 39 Atrium section 50 Middle-rise section 60 Second switching layer 70 High-rise section 76 Damping device M1 Primary mode M2 Secondary mode M3 Tertiary mode SH Column span (column span of low-rise section)
SL Pillar span (Pillar span of the middle layer)
SM column span (column span of upper part)

Claims (4)

a middle layer of a reinforced concrete structure, a steel-framed reinforced concrete structure, or a composite structure of a reinforced concrete structure and a steel-framed reinforced concrete structure;
a steel-framed low-rise section provided under the middle-rise section;
a steel-framed high-rise section provided on the middle-class section;
a damping device provided in the high-rise part;
a switching layer having a switching column and provided between the low layer portion and the middle layer portion;
with
The switching column is
a steel column part erected on the top of the steel column in the lower part and extending over the upper and lower beams of the switching layer ;
a concrete column portion in which the steel frame column portion is embedded;
has
The middle layer part is
a concrete pillar erected on the switching pillar;
a column main reinforcement embedded in the outer peripheral portion of the concrete column, extending downward from the lower surface of the concrete column, and embedded in the concrete column portion of the switching column;
having
Structure. a middle layer of a reinforced concrete structure, a steel-framed reinforced concrete structure, or a composite structure of a reinforced concrete structure and a steel-framed reinforced concrete structure;
a steel-framed low-rise section provided under the middle-rise section;
a steel-framed high-rise section provided on the middle-class section;
a damping device provided in the high-rise part;
a switching layer having a switching column and provided between the middle layer portion and the high layer portion;
with
The switching column is
a steel frame column erected on the column head of the concrete column of the middle layer, the column head being joined to the column base of the steel frame column of the high layer, and extending over the upper and lower beams of the switching layer ;
a concrete column portion in which the steel frame column portion is embedded;
a column main reinforcing bar embedded in the concrete column portion and connected to the column main reinforcing bar of the concrete column in the middle layer portion;
having
Structure. The pillar spans of the low-rise part and the high-rise part are wider than the pillar span of the middle-rise part,
A structure according to claim 1 or claim 2. At least one of the low-rise section and the high-rise section is provided with an atrium section.
The structure according to any one of claims 1 to 3.

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