JP5861886B2 - Wall-type mixed beam structure - Google Patents

Description

  The present invention relates to a wall-type mixed beam structure.

Conventionally, in a building, in order to realize a large span structure while ensuring frame rigidity, it is necessary to use a reinforced concrete (RC) structure, and generally a pre-stress structure is employed (for example, see Patent Document 1). ).
In Patent Document 1, a beam panel is bridged between the column heads, and a floor panel is temporarily installed between the beam panels. A configuration is disclosed in which the concrete is placed and the in-situ concrete is placed on these panels.

JP-A-6-88393

However, the conventional large span structure described above has the following problems.
In other words, construction with a pre-stress structure involves laborious tension work and there is a limit to the distance where pre-stress can be introduced. There was a limit to doing it. In the case of a normal large span structure, there is often a frame form with column beams, and since there are column types and beam types, there is a design disadvantage and there is a problem that it is disadvantageous in terms of space utilization .

  Moreover, in the conventional large span structure, since the weight of the building increases, the seismic force increases, which is disadvantageous in terms of structural design, so there is room for improvement in that respect.

The present invention has been made in view of the above-described problems, and can realize a large span structure and can improve the utility of the space by eliminating the column shape and the beam shape, thereby improving the design value. An object of the present invention is to provide a wall-type mixed beam structure that can be made to occur.
Another object of the present invention is to provide a wall-type mixed beam structure capable of reducing seismic force by reducing the weight of a building.

  In order to achieve the above object, the wall-type mixed beam structure according to the present invention includes a reinforced concrete wall, a plurality of beam steel frames arranged at intervals in the direction of the beam, and a composite beam integrally provided with a floor slab. The ends of the mixed-beam structure with a flat plate extending in the column direction while connecting and connecting one end and the other end of the plurality of beam steel frames of the composite beam The part reinforced concrete structure part is joined to the reinforced concrete wall.

In the present invention, one end of each of the plurality of beam steel frames of the composite beam (the other end) is integrally provided in a state of being incorporated in the end reinforced concrete structure extending in the direction of the beam, and the end reinforced concrete structure is provided. The part is joined to the reinforced concrete wall, and the floor part is a mixed structure floor with the beam steel frame, the floor slab, and the end reinforced concrete structure integrated together, so that the frame direction is maintained while ensuring the frame rigidity. A large span structure (space) can be formed by a frame surrounded by the reinforced concrete wall, the floor slab, and the end reinforced concrete structure.
In addition, because the end reinforced concrete structure has a flat plate structure, it has a wall-type structure without columnar or beam type, which can enhance the usability and flexibility of the space, and is excellent in terms of design. Can be realized.

Further, in the wall type mixed beam structure of the present invention, since the frame rigidity is increased, the thickness dimension of the floor slab of the composite beam can be reduced, the floor height can be increased, and the large span to be formed is formed. Space can be used more effectively. Furthermore, since it becomes a mixed structure floor and the floor cross section can be minimized, it is possible to reduce the weight of the building, and it is possible to provide an earthquake resistant frame with reduced seismic force.
Furthermore, in the wall type mixed beam structure of the present invention, it becomes a one-way structure floor, and the cross section along the beam direction is the same shape in the direction of the beam, so it can be set to any length in the beam direction. Can be constructed by unitizing them and combining them.

  Moreover, in the wall-type mixed beam structure according to the present invention, prestress in the inter-beam direction may be introduced into the beam steel frame between the end reinforced concrete structures on the lower surface side.

  According to the wall-type mixed beam structure of the present invention, the intermediate portion in the inter-beam direction is composed only of the beam steel frame and the floor slab. Therefore, by introducing prestress in the inter-beam direction on the lower surface side of this portion, It is possible to appropriately suppress the deflection generated.

  In the wall-type mixed beam structure according to the present invention, it is preferable that pre-stress in the inter-beam direction is introduced at the joint between the end reinforced concrete structure and the reinforced concrete wall.

  In this case, the crack which may arise in the junction part of an edge part reinforced concrete structure part and a reinforced concrete wall can be prevented.

According to the wall-type mixed beam structure of the present invention, an end reinforced concrete structure extending along the beam direction is assembled to each end of a plurality of beam steel frames arranged in the beam direction, and joined to the reinforced concrete wall. The frame rigidity can be increased, a large span structure can be realized, and the use of space can be improved by eliminating the column shape and beam shape, and the design value can be improved.
In addition, according to the wall type mixed beam structure of the present invention, it becomes a mixed structure floor, and it is possible to minimize the floor section, so that the seismic force can be reduced as the building becomes lighter. Can realize an earthquake-resistant frame.

It is a perspective view which shows the structure of the wall type mixed beam structure by embodiment of this invention. It is the elevation which looked at the inter-beam direction of the wall type mixed beam structure shown in FIG. It is the figure which looked at the top | upper surface of the wall type mixed beam structure shown in FIG. 1 from upper direction. It is an AA arrow directional view shown in FIG. 2, Comprising: It is an elevation view which shows a wall type mixed beam structure.

  Hereinafter, a wall type mixed beam structure according to an embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 4, the wall-type mixed beam structure according to the present embodiment is a structure in which a large span space R is formed in a building 1.
That is, the wall-type mixed beam structure is a composite in which a reinforced concrete (RC) wall 2 constituting the outer wall of the building 1, a plurality of beam steel frames 4 arranged at intervals in the crosswise direction Y, and a floor slab 5 are integrally provided. And a flat plate that extends along the column direction Y while connecting and connecting one end 4a and the other end 4b of the plurality of beam steel frames 4 of the composite beam 3 The end reinforced concrete structure (end RC structure 6) is joined to the RC wall 2.

  The beam steel frame 4 of the composite beam 3 is made of an H-shaped steel material, and is arranged with a certain interval in the sparge direction Y as shown in FIG. 3, and its ends 4 a and 4 b are joined to the RC wall 2. .

  The end RC building 6 is a portion provided on both ends of the composite beam 3 (beam steel 4 and floor slab 5) in the inter-beam direction X, and is integrated with the floor slab 5, and the beam steel 4 is embedded in the concrete. The structure is made. The cross-sectional configuration (thickness dimension) of the end RC structure 6 is such that the lower surface 6a is a dimension from the ceiling surface of the large span space R to the floor surface 5a of the floor slab 5, and can be set to 600 to 700 mm, for example. As the beam steel frame 4 at this time, for example, an H-shaped steel material having a height dimension of 350 mm and a width dimension of 350 mm can be employed.

  The portion between the end RC building portions 6 extending along the RC wall 2 (the floor intermediate portion 3a in the inter-beam direction X) has a beam steel frame 4 (lower flange portion) on the lower surface side of the composite beam 3. Exposed. In addition, it is also possible to provide a ceiling material on the floor intermediate portion 3a at a height position at the same level as the lower surface 6a of the end RC building portion 6 (dotted line in FIG. 2).

  Here, the length dimension L (refer to FIGS. 2 and 3) of the end RC structure portion 6 in the beam-to-beam direction X is about 1/5 of the separation dimension (internal span) of the RC walls 2 and 2 in the beam-to-beam direction X. The length is set to ¼. For example, when the inner span is 20 m, the length L of the end RC structure 6 is 4 to 5 m.

Next, the operation of the wall-type mixed beam structure configured as described above will be described in detail.
As shown in FIGS. 1 to 4, in the wall-type mixed beam structure of the present embodiment, one end portions 4 a (the other end portions 4 b) of the plurality of beam steel frames 4 of the composite beam 3 are arranged in the column direction Y. The end RC structure 6 is provided integrally with the extending end RC structure 6, and the end RC structure 6 is joined to the RC wall 2, and the floor portion also includes the beam steel frame 4, the floor slab 5, and the end RC structure. Since the mixed structure floor in which the sections 6 are integrally combined, the span length in the inter-beam direction X can be increased while securing the frame rigidity. A large span space R (large span structure) can be formed by the frame surrounded by the RC structure 6.

  Moreover, since the end RC structure 6 has a flat plate structure, it becomes a wall-type structure without a column shape or a beam shape, and can improve the usability and flexibility of the space, and is excellent in terms of design. A space can be realized.

  Moreover, in the wall-type mixed beam structure, the frame rigidity is increased, so that the thickness dimension of the floor slab 5 of the composite beam 3 can be reduced, the floor height can be increased, and the large span space formed. R can be used more effectively. Furthermore, since it becomes a mixed structure floor and a floor cross section can be minimized, the weight of the building 1 can be reduced, and an earthquake-resistant frame with reduced seismic force can be obtained.

  Furthermore, in the wall-type mixed beam structure, a unidirectional structural floor that is long in one direction (column direction Y) is formed, and the cross section along the beam direction X is the same shape in the beam direction Y. The length can be set, and the frame can be constructed by unitizing the frame with precast concrete and combining them.

Further, the steel beam 4 between the end RC structures 6 is provided with a PC steel material (not shown) along the inter-beam direction X with respect to the lower flange, for example, on the lower surface side. It is good also as a structure which introduces stress.
In this case, since the intermediate part in the inter-beam direction X is composed only of the beam steel frame 4 and the floor slab 5, the deflection occurring in the intermediate part by introducing prestress along the inter-beam direction X on the lower surface side of this part. Can be appropriately suppressed.

Further, a PC steel material (not shown) is provided along the beam-to-beam direction X at the joint T between the end RC building portion 6 and the RC wall 2, and a prestress in the beam-to-beam direction X is introduced. Good.
In this case, the crack which may arise in the junction part T of the edge part RC structure part 6 and RC wall 2 can be prevented.

  Moreover, in the wall-type mixed beam structure, the thickness of the end RC building portion 6 and the RC wall 2 can be suppressed by reducing the arrangement interval of the beam steel frames 4 in the beam running direction Y in the floor intermediate portion 3a in the inter-beam direction X. The structural design can be performed with a unit width in the same manner as a normal RC floor.

As described above, in the wall-type mixed beam structure according to the present embodiment, one end (end portions 4a and 4b) of each of the plurality of beam steel frames 4 arranged in the column direction Y extends along the column direction Y. By joining the end RC structure 6 to the RC wall 2, the frame rigidity can be increased, a large span space R can be realized, and the column shape and the beam shape can be eliminated. The availability of the space can be increased and the design value can be improved.
Moreover, according to the wall type mixed beam structure, it becomes a mixed structure floor and the floor cross section can be minimized, so that the seismic force can be reduced as the building 1 is reduced in weight. Can be realized.

As mentioned above, although embodiment of the wall type mixed beam structure by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, although an example applied to a building is shown in this embodiment, the present invention is not limited to this, and can be applied to an underground structure, for example.
Also, the configuration of the beam steel frame 4, the arrangement interval (column dimension) of the plurality of beam steel frames, the thickness dimension of the floor slab 5, the length dimension L in the column direction Y of the end RC structure 6, the thickness dimension, etc. Is appropriately set based on construction conditions such as the shape of the building 1 and the size (area) of the large span space R.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

1 Building 2 RC wall (Reinforced concrete wall)
3 Composite Beam 3a Middle Floor 4 Beam Steel Frame 4a One End 4b The Other End 5 Floor Slab 6 End RC Building (End Reinforced Concrete Building)
R Large span space T Joint X Beam-to-beam direction Y Digit method

Claims (3)

A wall-type mixed beam structure comprising a reinforced concrete wall, a plurality of beam steel frames arranged at intervals in the direction of the beam, and a composite beam integrally provided with a floor slab,
An end reinforced concrete structure that constitutes a flat plate extending along the crossing direction and connecting and connecting one end of the plurality of beam steel frames and the other end of the composite beam is the reinforced concrete wall. A wall-type mixed beam structure characterized by being bonded to the wall.   The wall-type mixed beam structure according to claim 1, wherein pre-stress in the inter-beam direction is introduced into the beam steel frame between the end reinforced concrete structures on the lower surface side.   3. The wall-type mixed beam structure according to claim 1, wherein prestress in an inter-beam direction is introduced into a joint portion between the end reinforced concrete structure and the reinforced concrete wall.

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