JP2001020383A - Composite structure of building using sc construction beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure which can obtain a long span at a low cost by constructing an SC construction beam by arranging U-shaped crack reinforcement steel bars in the periphery of a beam steel frame which bears stress of a building and covering them with concrete. SOLUTION: This composite structure is formed of a post of RC construction and a beam of SC construction, the RC constructed post is provided with a PCa stud, and the SC constructed beam is formed of a beam steel frame 1, a crack reinforcement steel bar 2 and beam concrete 3. The beam steel frame 1 is shape steel having an H-shaped section, and the crack reinforcement steel bar 2 is welded to the beam steel frame 1 with U-shaped beam bar members 2a, 2b opposite to each other. A buried-in type frame may be set on both sides of a web part 1a of the beam steel frame 1 to form a hollow part in the concrete 3. Concrete or mortar is filled in a gap between the steel pipe for penetration provided in the steel frame member and the PCa stud to be integrated with each other, and subsequently the beam steel frame 1 is connected and fixed to the steel frame member. Thus, the span can be taken long so as to reduce the number of posts and secure the freedom for plane planning.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mixed structure of a building,
Particularly, the present invention relates to a mixed structure of a building using SC (steel frame concrete) beams.

[0002]

2. Description of the Related Art A general building has a mixed structure of RC (reinforced concrete) columns and S (steel frame) beams, and S columns.
RC (steel reinforced concrete) structure, steel reinforced concrete structure with S-beams, S-structured columns, S-structured steel beams, and RC reinforced columns and RC reinforced concrete beams Have been. The pillar is CFT
In some buildings, SC beams or S beams are used.

[0003] However, in the above conventional construction method,
RC structures applied to high-rise houses have problems such as short span length and many columns. In addition, SRC super high-rise houses have problems such as an increase in joint work of beam reinforcement. Further, the CFT structure and the SRC structure have problems such as a large amount of steel frame. Furthermore, in the mixed structure of RC columns and S beams used in shopping centers and the like, there is a problem that a fire-resistant coating work of steel frames is required.

As described above, the above-mentioned conventional construction methods have respective problems, and there has been a demand for the development of a construction method which is as low in cost as RC structures and has a long span equivalent to that of SRC structures and CFT structures.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional construction method. It is an object of the present invention to provide an SRC structure and a CFT structure at a low cost similar to an RC structure. S that can take a long span equivalent to
An object of the present invention is to provide a mixed structure of a building using C beams.

[0006]

The mixed structure of a building using SC beams according to the present invention is a mixed structure composed of RC or SRC columns and SC beams, wherein the SC beams reduce the stress of the building. It is characterized by being composed of a beam steel frame to be borne, a reinforcing bar for cracks arranged around the beam steel frame, and a beam concrete covering these beam frames and the reinforcing bar for cracks. In addition, a hollow portion is formed inside the SC beam. Further, it is also characterized in that the crack reinforcing reinforcing bar is constituted by two U-shaped reinforcing bars, and is arranged so as to be extrapolated from above and below the beam steel frame. Still further, the RC column has a PCa core column. Furthermore, concrete or mortar is filled and integrated into the gap between the steel pipe for penetration provided integrally with the steel frame member connecting the beam steel frame and the PCa pillar vertically penetrating the steel pipe for penetration. It is also characterized. The PCa core column and the penetrating steel pipe were
a. Before or after the core pillar is built, it is integrated.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG.
1 shows an embodiment of a building having a mixed structure comprising SC (steel frame concrete) beams according to the present invention, wherein A is an SC beam, B is an RC column, and C is a beam-column joint member.

As apparent from FIG. 3, the SC beam A
Is composed of a beam steel frame 1, a reinforcing steel bar 2 for cracking, and a beam concrete 3. 4 is a slab of the building.

The beam steel frame 1 is a section steel having an H-shaped cross section, and comprises a vertical web portion 1a and flange portions 1b extending laterally on both sides from upper and lower ends of the web portion 1a. . The beam steel frame 1 may be a steel bar such as an I-beam or the like, or a web 1a and a flange 1b integrated by welding, in addition to the H-beam.

The reinforcing reinforcing bar 2 is integrally welded to the beam steel 1 with the upper and lower U-shaped beam reinforcing members 2a and 2b facing each other. As shown in FIG. 4, the U-shaped beam reinforcing members 2a and 2b are each formed by integrally assembling a plurality of U-shaped reinforcing bars 2a 'and 1b' with connecting bars 2a "and 2b". . The reinforcing bar for crack reinforcement 2 is only expected to have a crack reinforcing effect. As described above, the work of assembling the beam reinforcement can be eliminated by integrally welding the above-mentioned reinforcing steel bar 2 to the beam steel frame 1. Also, the joint work between the beam bars becomes unnecessary by assembling the U-shaped beam bar members 2a and 2b.

The beam concrete 3 functions to maintain the rigidity effect and fire resistance, and may be either cast-in-place concrete or PCa (precast concrete), and can meet various needs. Note that the connection between the beam steel frames 1 can be made by a conventional method.

FIG. 5 shows another embodiment of the SC beam A according to the present invention. An embedded form 5 constructed of a thin iron plate or the like is set on both sides of the web portion 1a of the beam steel frame 1. Thus, a hollow portion 6 is formed in the concrete 3 to reduce the weight of the SC beam.

Referring again to FIGS. 1 and 2, the RC
The pillar B has a PCa core pillar 7 at the center thereof.
The core column 7 is built prior to the setting of the reinforcing bars and the formwork of the RC column B and the casting of concrete, and the SC beam A on the upper floor is built.
Etc. can be efficiently installed.

FIG. 6 shows a beam-to-column connection member C between the SC beam A and the RC column B. The steel beam member 8 has a cross shape.
The steel member 8 includes a steel pipe 9 for penetration which is integrally provided so as to penetrate vertically in the center of the steel member 8, and a reinforcing strip 10 arranged in a joint panel zone.

At the time of construction, first, the PCa core post 7
The PCa core column 7 is erected at a predetermined position in a state where the steel pipe 9 for penetration is extrapolated and the beam-column joint member C is attached. Next, the steel member 8 of the beam-column connection member C is provided with the S
The beam steel frame 1 of the C beam A is connected and fixed. Subsequently, the column main reinforcement 11 is arranged in the band reinforcement 10 of the beam-column joint member C, the band reinforcement 12 is arranged around the column main reinforcement 11, and the formwork 13 is attached. After the PCa core column 7 has been erected in advance, the steel pipe 9 for penetration may be extrapolated to the PCa core column 7 to attach the beam-column joint member C. P
In order to integrate the Ca core column 7 and the steel pipe 9 for penetration, the gap between them is filled with concrete or mortar.

Also, a formwork (not shown) is set on the SC beam A, and a slab formwork or a semi-PCa slab is set and concrete is poured. It should be noted that a full PCa column member may be used instead of the beam-column joint member B having the PCa core column 7. As is clear from FIG. 1, the above works are sequentially performed from the upper floor to the lower floor, and the work can be performed first on the upper floor and the subsequent work can be performed simultaneously and concurrently on the lower floor. The efficiency can be improved and the construction period can be significantly reduced. In addition, the SC beam of the present invention can correspond to a slab as a so-called inverted beam. In the above embodiment, RC
The column of the structure was explained.
It may be a mixed structure joined to a structural pillar.

[0017]

[Effects of the Invention] 1) By making the beam SC, R
Compared with the C type, the span can be made longer, the number of pillars can be reduced, and the freedom of floor plan can be secured. 2) Since the beam steel frame and the reinforcing steel for crack reinforcement are integrated and built, construction efficiency is improved. 3) Since the reinforcing reinforcing bar is composed of two U-shaped reinforcing bars and is attached to the beam steel so as to be extrapolated from above and below, the bar arrangement work is greatly simplified as compared with the conventional stirrup. 4) Since the reinforcing bar for crack reinforcement is welded to the beam steel frame and integrated, there is no need to assemble the rebar or to join the rebars together, so that the work can be streamlined. 5) Since the concrete holding capacity of the beam steel structure is high, the formwork under the beam can be dismantled and removed at an early stage, and the number of times of formwork conversion increases, which not only reduces the cost but also shortens the construction period. . 6) The concrete can be cast on the pillars, beams and floor in one time, so that the process can be shortened. 7) By forming the hollow portion inside, the weight of the member can be reduced. 8) Since the beam members processed at the factory are installed, no space is required at the site, not only the effect is particularly exhibited in the narrow site, but also the beam members can be stacked and the transportation efficiency is improved. . 9) Standardization can be achieved in the design of beam members. 10) The application of the SC beam method of the present invention to buildings is as follows.
In low-rise buildings, it can be applied to shopping centers, offices, and warehouses, and in high-rise buildings, it can be applied to apartments, hotels, offices, etc., and new needs can be discovered. Was.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a mixed structure construction method of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a cross-sectional view showing one embodiment of an SC beam.

FIG. 4 is a perspective view showing one embodiment of a reinforcing bar of an SC beam.

FIG. 5 is a sectional view showing another embodiment of the SC beam.

FIG. 6 is a perspective view showing an embodiment of a beam-column joint member with a PCa core used in the mixed structure construction method of the present invention.

[Explanation of symbols]

A SC beam B RC beam C Beam-column joint 1 Steel 1a Web 1b Flange 2 Crack reinforcing steel 2a, 2b U-shaped beam reinforcing member 2a ', 2b' U-shaped reinforcing bar 2a ", 2b" muscle third beam concrete 4 slab 5 embedded frame 6 hollow portion 7 PCa core columns 8 steel member 9 through a steel pipe 10 girdle muscular 11 poster main reinforcements 12 girdle muscular 13 formwork

Claims (6)

[Claims] 1. A mixed structure comprising RC or SRC columns and SC beams, wherein the SC beams are used for supporting a building stress and a reinforcement for cracks arranged around the beam steel. A mixed structure of buildings using SC beams, comprising a reinforcing steel and beam concrete covering these steel beams and reinforcing steel for cracks. 2. The mixed structure according to claim 1, wherein a hollow portion is formed inside the SC beam. 3. The SC structure according to claim 1, wherein the reinforcing reinforcing bar is formed of two U-shaped reinforcing bars, and the reinforcing bars are arranged so as to be extrapolated from above and below the beam steel frame. Mixed structure of building with beams. 4. The mixed structure of a building using SC beams according to claim 1, wherein the RC columns have PCa core columns. 5. A concrete or mortar is filled into a gap between a penetrating steel pipe provided integrally with a steel frame member connecting the beam steel frame and a PCa core pillar vertically penetrating the penetrating steel pipe. The mixed structure of a building by the SC beam according to claim 4, characterized in that the structure is formed. 6. The PCa core column and the steel pipe for penetration are connected by
The mixed structure of a building using SC beams according to claim 5, wherein the building is integrated before or after the a-core pillar is built.