JPH10231559A - Center pillar provided with beam steel frame, and construction method for mixed structure using same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a center pillar provided with a beam steel frame, and a contruction method for a mixed structure in which manufacturing cost and transport cost can be largely reduced, and in which a construction period can be reduced. SOLUTION: A center pillar 1 is a precast member comprising spiral steel pipe having spiral ribs and center pillar concrete filled in it. A beam steel frame 2 for joining an end part of a steel beam is composed of a cross-shaped steel member 2a, and an insertion steel pipe 2b integrally provided to vertically penetrate a center part of the steel frame member 2a. In some cases, a closure plate 2c of a column-beam joint part panel zone is used. The center pillar 1 is inserted into the insertion steel pipe 2b of the beam steel frame 2 to fix its position, and expansion mortar 3 is filled in a gap between the center pillar 1 and the insertion steel pipe 2b, thereby the center pillar 1 and the beam steel frame 2 are integrated with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed structure in which a pillar is made of reinforced concrete (RC) and a beam is made of steel (S). Concerning the construction method.

[0002]

2. Description of the Related Art Conventionally, as a method of constructing a mixed structure in which a column is made of RC and a beam is made of S, a core column is first erected at the center of the column, and a steel beam is joined to the core column. By doing so, a construction method has been developed in which pillars can be efficiently constructed similarly to S-shaped buildings.

[0003]

However, according to the above-mentioned conventional method of constructing a mixed structure, a bracket for joining or supporting a steel beam must be attached to a core column made of a steel pipe in advance. In addition to being bulky for transportation, there is a problem in that since the joint position of the steel frame beam with respect to the core column is determined in advance, only order-made production can be performed.

[0004] The present invention has been made to solve the above-mentioned conventional problems, and its object is to not only significantly reduce manufacturing costs and transportation costs, but also shorten the construction period. It is an object of the present invention to provide a method of constructing a core column with a steel beam and a mixed structure.

[0005]

According to the present invention, there is provided a core column with a steel beam for a beam, which is to be built at the center of the reinforced concrete column of a mixed structure composed of a reinforced concrete column and a steel beam. It is characterized in that it is inserted into a penetrating member of a beam steel frame for joining a steel beam, and a filler is filled in a gap between the beam member at a predetermined position and the beam steel frame is integrated. . The core pillar is configured by filling core pillar concrete in a steel pipe.

In the method for constructing a mixed structure according to the present invention, the core column with the beam steel structure having the above-mentioned structure is erected at substantially the center of the construction position of the reinforced concrete column, and the steel frame is inserted between the beam steel frames of the core column with the beam steel structure. It is characterized in that a beam is erected, a column reinforcing bar is arranged around a core column, and a column formwork is assembled around the column reinforcing bar, and a column concrete is cast.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a core pillar, as shown in FIG. 2, a spiral rib 1a '.
Pillar concrete 1b in spiral steel pipe 1a having
Is a precast member filled with. Numeral 2 is a beam steel frame for joining the ends of the steel beams, and as shown in an enlarged manner in FIG. 3, a cross-shaped steel member 2a and a vertically extending through the center of the steel member 2a. It is composed of an integrally inserted steel pipe 2b for insertion. 2c is a surrounding plate of the beam-column joint panel zone, and may be omitted.

As is apparent from FIG. 4, after inserting the core column 1 into the steel pipe 2b for penetration of the beam steel 2 and fixing the position of the beam steel 2 with respect to the core column 1, the core column 1 is fixed. The gap between the core column 1 and the steel pipe 2b for insertion is filled with the expansion mortar 3, and the core column 1 and the beam steel frame 2 are integrated.

[0009] For this integration work, for example, as shown in FIG. 5, the beam steel frame 2 is set on a gantry D arranged at a predetermined interval at a construction site or a manufacturing factory, and the set beam steel frame 2 is set. The mortar 3 is filled by inserting the core column 1 into the steel pipe 2b for insertion.

As described above, the core pillar 1 to which the steel beams 2 are integrally attached is erected at the center of the pillar at the construction site as shown in FIG. 4a is the column reinforcement 4 of the foundation or lower floor
And 4b is a hoop of the column reinforcing bar 4.

Next, as shown in FIG. 6, a steel beam 5 is erected between the steel members 2a of the beam steel member 2 and is fully tightened. 5 'is a small beam. Subsequently, as shown in FIG. 7, the column main reinforcement 4a is erected, and the hoop 4b is arranged. A floor slab deck 6 is laid on the steel beam 5.

[0012] Thereafter, as shown in FIG.
Is assembled with the column formwork 7 and the column concrete is cast. Slab bars 8 are arranged on the floor slab deck 6. Further, the upper-column pillar reinforcement 4 is arranged.

The spiral steel pipe 1a of the core column 1 of the above embodiment.
Is formed with a spiral rib 1a 'to enhance the integration with the expanded mortar 3, but the core pillar 1 of the present invention
The present invention is not limited to this. For example, ring-shaped or discontinuous ribs, point-like protrusions, concave ribs and grooves, stud welding, and the like can be used as long as they can enhance the integrity with the expansion mortar 3. Either may be used. Further, the spiral steel pipe 1a may be omitted, and a configuration in which uneven ribs, protrusions, grooves, and the like are formed on the peripheral surface of the core concrete 1b, or studs may be provided.

It is preferable to form unevenness on the inner surface of the steel pipe 2b for penetration of the beam steel frame 2 or to weld studs or the like to strengthen the integration with the expanded mortar 3. Also,
In the above embodiment, the steel member 2a is formed in a cross shape.
Depending on the position of the reinforced concrete column, it may be T-shaped, L-shaped or I-shaped.

The penetration member of the present invention is not limited to the above penetration steel pipe 2b. For example, as shown in FIG. 9, a rectangular tube is attached to the inner end of a steel member 2a joined in a cross shape. The body 2b 'may be attached. Further, the steel pipe 2b for penetration is not limited to a circular shape, and may be any shape such as a square shape. Further, as the filler of the present invention, in addition to the expanded mortar, ordinary cement mortar, resin mortar, resin-containing mortar, and the like, in other words, any filler that can integrate the insertion member and the core pillar It may be a material.

[0016]

[Effects of the Invention] Since the mounting position of the beam steel frame with respect to the core column can be freely set, it is possible to manufacture and stock a large number of core columns and beam steel frames in advance, which significantly reduces the manufacturing cost and the transportation cost. Not only can it be reduced, but it is also possible to shorten the construction period.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an operation of constructing a core column in a method of constructing a mixed structure according to the present invention.

FIG. 2 is a perspective view of the core pillar of FIG.

FIG. 3 is a perspective view of the beam steel frame of FIG. 1;

FIG. 4 is a detailed plan view (A) and a longitudinal sectional view (B) of a column / beam panel zone.

FIG. 5 is an explanatory diagram of a method of assembling a core column and a beam steel frame.

FIG. 6 is an explanatory diagram of a beam steel frame erection work in the method for constructing a mixed structure according to the present invention.

FIG. 7 is an explanatory view of the work of laying a beam reinforcing bar and laying a floor slab deck in the method of building a mixed structure according to the present invention.

FIG. 8 is an explanatory view of the work of laying the column formwork and arranging the slab bars in the method of building a mixed structure according to the present invention.

FIG. 9 is a plan view of a column / beam panel zone showing another embodiment of the insertion member of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core column 1a Spiral steel tube 1a 'Spiral rib 1b Core column concrete 2 Beam steel 2a Steel member 2b Penetrating steel tube 2b' Square tube 2c Enclosure plate 3 Expansion mortar 4 Column reinforcing bar 4a Column main bar 4b hoop 5 steel beam 5 ' Small beam 6 floor slab deck 7 pillar form 8 slab bar D base 5

Claims (3)

[Claims] 1. A core pillar for building a mixed structure composed of a reinforced concrete column and a steel beam at the center of the reinforced concrete column, and a member for inserting a beam steel beam for joining the steel beam. A beam-filled pillar with a beam steel frame integrated by filling a gap with the member for insertion at a predetermined position with a filler. 2. The pillar according to claim 1, wherein the pillar is formed by filling a pillar with concrete in a steel pipe. 3. The core column with a steel beam according to claim 1 or 2 is erected substantially at the center of the reinforced concrete column, and a steel beam is erected between the steel columns of the core column with a steel beam. A method of constructing a mixed structure, comprising: arranging a column reinforcing bar around a core column, assembling a column form around the column reinforcing bar, and pouring column concrete.