JPH0791862B2 - Concrete column / beam structure and its construction method - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a reinforced concrete column / beam structure and a method for constructing the structure.

[Prior art]

A concrete column or beam with a single annular reinforcing bar arranged along the inner side, or a double circular reinforcing bar with the main reinforcing line arranged along the inner side at the required intervals. The columns made of reinforced concrete (Japanese Patent Application Laid-Open No. 61-277730) are already known individually.

[Problems to be Solved by the Invention]

According to the present invention, such columns and beams (including “girders”) are integrated, and the required distance between the shear reinforcing bar having the main bar arranged along the inner side and the shear reinforcing bar having no such main bar is set. The present invention relates to a method of constructing a concrete column / beam structure that has been placed in an open state, and aims to further improve the yield strength and toughness of the structure during large deformation.

[Means for solving problems]

The concrete pillar / beam structure of the present invention is as follows. A vertical squirrel cage rebar in which a square frame-shaped inner shear reinforcing bar 2 is wound and fixed around a main pillar reinforcing bar 1 is embedded in a core portion A ′ made of cast-in-place concrete. A pillar member A ″ in which the outer shear reinforcing bars 3 formed in a similar shape are arranged at a required interval along the inner wall surface of the concrete cylinder surrounds and constrains the core portion A ′. Inner shear reinforcement 2 and outer shear reinforcement 3
Of pillar A in which the corresponding sides are arranged in parallel and at equal intervals, and a horizontal cage type rebar in which a rectangular frame-shaped inner shear reinforcing bar 6 is wound and fixed around the main beam 5 for beam is made of cast-in-place concrete. Inside the core groove B'of the concrete, while the outer shear reinforcing bar 7 which is embedded in the core part B'of the above and is formed in a similar shape to the inner shear reinforcing bar 6 is projected outward. Beam members B ″ arranged along the wall surface at a required interval straddle the upper end opening edges of the pillar members A ″ and surround and constrain the core portion B ′. The reinforcement 6 and the beam B in which the corresponding sides of the outer shear reinforcement 7 are arranged in parallel and at equal intervals are subjected to the required reinforcement treatment at their joints, and that portion is connected to the core portion A described above. Cast-in-place concrete continuous to'and B ' It is intended to be buried in. The method for constructing the concrete pillar / beam structure of the present invention is as follows. A vertical cage type rebar having a plurality of rectangular frame-shaped inner shear reinforcing bars 2 wound around and fixed around a plurality of main pillar reinforcing bars 1 at predetermined intervals is established. The outer shear reinforcing bar 3 is formed by arranging the outer shear reinforcing bar 3 formed in a shape similar to the streak 2 along the inner wall surface of the concrete cylinder at a required interval and suspending it from above. Three
And the inner shear reinforcing bar 2 are made to stand upright so that the corresponding sides are parallel and at equal intervals, and the rectangular frame-shaped outer shear reinforcing bar 7 is made of concrete with its upper side protruding outward. The beam members B ″, which are arranged along the inner wall surface of the concave groove body at a predetermined interval, are straddled between the upper end opening edges of the above-mentioned established column member A ″, and a plurality of beam main bars 5 are provided. A beam of a horizontal cage type rebar having a plurality of inner shear reinforcing bars 6 formed in a similar shape to the outer shear reinforcing bars 7 wound around and fixed at a plurality of predetermined intervals. Is inserted and supported in the concave groove so that the corresponding sides of the outer shear reinforcing bar 7 and the inner shear reinforcing bar 6 are parallel and at equal intervals, and then the pillar member A ″ and the beam member B ″. The required reinforcement processing is performed in the joint opening of the column member A ″ including the joint opening. It is to pouring the fresh concrete to the beam member B "within.

[Action]

According to the structure of the present invention, the vertical cage type rebar having the square frame-shaped inner shear reinforcing bar 2 wound and fixed around the column main bar 1 is embedded in the core portion A ′ made of cast-in-place concrete. A column member A ″, which is formed by arranging outer shear reinforcing bars 3 formed in a similar shape to the inner shear reinforcing bars 2 along an inner wall surface of a concrete cylinder at a required interval, surrounds the core portion A ′. The column A is constrained and has a rectangular frame shape around the pillar A in which the corresponding sides of the inner shear reinforcing bar 2 and the outer shear reinforcing bar 3 are arranged in parallel and at equal intervals. A horizontal cage type reinforcing bar having an inner shear reinforcing bar 6 wound and fixed is embedded in a core portion B'made of cast-in-place concrete, and an outer shear reinforcing bar 7 formed in a similar shape to the inner shear reinforcing bar 6 is formed. Concrete with its upper side protruding outward Beam members B ″, which are arranged along the inner wall surface of the concave groove body made at a predetermined interval, straddle between the upper opening edges of the pillar members A ″ and surround and constrain the core portion B ′. Moreover, the inner shear reinforcement 6 and the beam B in which the corresponding sides of the outer shear reinforcement 7 are arranged in parallel and at equal intervals are subjected to the required reinforcing bar treatment at their joints, and Since the part is embedded in the cast-in-place concrete that is continuous with the core parts A'and B ', the yield strength does not decrease even during large deformation, the toughness is improved, and the uniform yield strength against vertical and horizontal deformation Further, according to the construction method of the present invention, the concrete structure can be easily manufactured.

【Example】

The invention will now be described with reference to the illustrated embodiments. A "is a column member in which outer shear reinforcing bars 3 having an annular shape, more specifically, a square frame shape, are arranged at required intervals along the inner wall surface of a rectangular prism made of concrete (Fig. 3). B ″ is a ring-shaped, more specifically, rectangular frame-shaped outer shear reinforcing bar 7 arranged at a predetermined interval along the inner wall surface of the concrete groove with the upper side thereof protruding outward. Beam member (Fig. 4). The column member A ″ and the beam member B ″ are factory manufactured in advance by an appropriate manufacturing method (for example, the manufacturing method disclosed in Japanese Patent Publication No. 60-26682). Reference numeral 1 is a main bar for a column, a plurality of which are erected on a predetermined foundation in a required arrangement, and a hoop line around which is formed a square frame-shaped inner shear reinforcing bar similar to the outer shear reinforcing bar 3 described above. 2 is assembled and fixed at required intervals in a predetermined number of stages to assemble a vertical cage rebar, and the above-mentioned pillar member A ″ is hung from above to correspond to the inner shear reinforcing bar 2 and the outer shear reinforcing bar 3. The beams are arranged so that their respective sides are parallel to each other and are equidistant from each other, and are fitted and erected. The member B ″ is straddled. The inner shear reinforcements formed in a rectangular frame shape similar to the outer shear reinforcements 7 that are stirrup reinforcements around a plurality of beam main reinforcements 5 arranged in advance. 6 is assembled in a state that it is wound and fixed at a required number of stages at a predetermined interval. The type rebars are arranged in the groove of the above-mentioned beam member B ″ that is bridged so that the corresponding sides of the inner shear reinforcing bar 6 and the outer shear reinforcing bar 7 are parallel and evenly spaced, and then inserted. To support. After that, a known reinforcing bar treatment is performed in the joint opening portion of the pillar member A ″ and the beam member B ″ and between the floor members 9 and 9 installed between the beam members B ″ to form the pillar member A ″. Concrete is poured into the inside and the beam member B ″ and on the floor formwork 9 and 9. By this, the core parts A ′ and B ′ of the concrete, the pillar member A ″, and the beam member B ″ are integrated. Moreover, the pillar-beam structure formed by the concrete pillar A and the beam B in which the cast concrete at the joint portion and the core portions A ′ and B ′ that are continuous with the concrete are integrally constructed. According to such a construction method, that is, a construction method using the column member A ″ and the beam member B ″ made of precast, the outer shear reinforcing bar 3, contained in the column member A ″ and the beam member B ″, Increase the amount of 7 to reduce the amount of inner shear reinforcements 2, 6 assembled and used in the field It is also possible, in. The above pillar A can be increased that much workability, the inner shear reinforcement 2 and core portion of the column for main reinforcement 1 and the concrete in contact with the inside A '
Each of the inner shear reinforcing bars 2 is embedded in the inner shear reinforcing bars 2 while the outer shear reinforcing bars 3 are arranged on the inner wall surface of the column member A ″ so as to surround and constrain the core portion A ′. The sides are parallel to each other and are arranged at equal intervals (Fig. 1) In the above-mentioned beam B, the inner shear reinforcing bar 6 and the beam main bar 5 which abuts on the inner side thereof are the core portion B'of concrete.
And the outer shear reinforcing bar 7 is arranged on the inner wall surface of the beam member B ″, and the outer shear reinforcing bar 7 is spaced apart from the inner shear reinforcing bar 6 while surrounding the core portion B ′. The sides are parallel to each other and are arranged at equal intervals.
(Fig. 2). Therefore, in the columns A and the beams B, the concrete core portions A ′ and B ′ are constrained by the inner shear reinforcing bars 2 and 6, and further constrained by the outer shear reinforcing bars 3 and 7, so that the shear reinforcing effect is increased. However, it improves the yield strength and toughness during large deformation.

【The invention's effect】

As is clear from the above description, the concrete pillar / beam structure of the present invention has the following effects. A vertical squirrel cage rebar with a rectangular frame-shaped inner shear reinforcing bar wound around and fixed to the column main reinforcement is embedded in a cast-in-place concrete core part A ′ and has a similar shape to the inner shear reinforcing bar. A pillar member A ″, which is formed by arranging the formed outer shear reinforcements at a required interval along the inner wall surface of the concrete cylinder, surrounds and constrains the core portion. Column A in which the corresponding sides of the shear reinforcement are arranged in parallel and at equal intervals, and a horizontal cage type reinforcement with a square frame-shaped inner shear reinforcement wound around the main reinforcement for the beam is cast in place. The inner wall surface of the concrete groove body, which is embedded in the core portion B ′ made of steel and has an outer shear reinforcement formed in a similar shape to the inner shear reinforcement, with its upper side protruding outward. And place them at the required intervals along A beam member B ″ that straddles the upper end opening edge of the pillar member A ″ and surrounds and constrains the core portion B ′, and the inner shear reinforcing bar and the outer shear reinforcing bar correspond to each other. Beams B, whose sides are parallel to each other and are arranged at equal intervals, are subjected to the required reinforcing bar treatment at their joints, and the portions are placed in a cast-in-place concrete continuous with the core portions A ′ and B ′. Since it is buried, there is no decrease in yield strength even during large deformation, and toughness is improved.In addition, the inner shear reinforcement and the outer shear reinforcement of the column A and the inner shear reinforcement and the outer shear reinforcement of the beam B are respectively Since it is formed in a similar shape, it has a uniform proof strength against vertical and horizontal deformation.
The toughness can be maintained. Furthermore, according to the construction method of the present invention, the concrete pillar / beam structure can be easily manufactured.

[Brief description of drawings]

Drawing FIG. 1 is a horizontal cross-sectional view of a pillar of the structure of the present invention, FIG. 2 is a vertical cross-sectional view of the same beam, FIG. 3 is a perspective view of a pillar member, FIG. 4 is a perspective view of a beam member, and FIG. The figure shows a side view of a column member fitted to a vertical cage type reinforcing bar. In Fig. 6, a beam member is straddled over the established column member, and a horizontal cage type reinforcing bar is inserted and supported in the groove of the beam member. It is explanatory drawing which shows a condition. 1 ... Column main reinforcement, 2 ... Inner shear reinforcement, 3 ... Outer shear reinforcement, 5 ... Beam main reinforcement, 6 ... Inner shear reinforcement, 7
…… Outside shear reinforcement, A …… Column, A ′ …… Core part,
A "... pillar member A", B ... beam, B '... core part,
B ″ ... Beam member.

Claims (2)

[Claims] 1. A vertical cage type rebar having a rectangular frame-shaped inner shear reinforcing bar 2 wound around and fixed to a main bar for a column is embedded in a core portion A'made of cast-in-place concrete, and the inner shear is also provided. A column member A ″, which is formed by arranging outer shear reinforcing bars 3 formed in a similar shape to the reinforcing bars 2 along the inner wall surface of a concrete cylinder at required intervals, surrounds the core portion A ′. Moreover, a pillar A in which the corresponding sides of the inner shear reinforcing bar 2 and the outer shear reinforcing bar 3 are arranged in parallel and at equal intervals, and a rectangular frame-shaped inner shear reinforcing bar 6 around the beam main bar. A horizontal cage type reinforcing bar wound around and fixed to is embedded in a core portion B'made of cast-in-place concrete, and an outer shear reinforcing bar 7 formed in a similar shape to the inner shear reinforcing bar 6 has its upper side outward. The concave groove made of concrete The beam members B ″ arranged along the inner wall surface at a required interval straddle the upper end opening edges of the column members A ″ and surround and constrain the core portion B ′. The reinforcing bars 6 and the beams B in which the corresponding sides of the outer shear reinforcing bars 7 are arranged in parallel and at equal intervals are subjected to the required reinforcing bar treatment at their joints, and the portions are connected to the core portion described above. A concrete pillar / beam structure characterized by being buried in a cast-in-place concrete continuous with A'and B '. 2. A vertical cage type rebar in which a plurality of rectangular frame-shaped inner shear reinforcing bars 2 are wound around and fixed around a plurality of main columns for columns at predetermined intervals, and the vertical cage type rebar is Outer shear reinforcement 3 formed in a similar shape to the inner shear reinforcement 2.
The column members A ″, which are arranged along the inner wall surface of the concrete cylinder at required intervals, are hung from above, and the corresponding sides of the inner shear reinforcing bar 2 and the outer shear reinforcing bar 3 correspond to each other. Make sure that they are erected so that they are parallel to each other and at equal intervals, and that the outer shear reinforcing bars 7 of the rectangular frame shape are projected outwardly along the inner wall surface of the concrete groove. The beam members B ″ arranged at intervals are straddled between the upper opening edges of the established column members A ″, and a similar shape to the outer shear reinforcing bar 7 is formed around a plurality of beam main bars. The horizontal cage-shaped reinforcing bar formed by winding and fixing the inner shear reinforcing bar 6 formed in a plurality of stages at predetermined intervals is provided in the concave groove of the beam member B ″ straddled above and the outer shear reinforcing bar 7 and the inner side. Inserted and supported so that each side corresponding to the shear reinforcing bar 6 is parallel and at equal intervals, And performing required rebar treatment in the joint opening of the above-mentioned pillar member A ″ and beam member B ″, and pouring ready-mixed concrete into the pillar member A ″ and beam member B ″ including the joint opening. A method of constructing a characteristic concrete pillar / beam structure.