JPS61290136A - Construction of reinforced concrete pillar - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of constructing a steel reinforced concrete column.

(Conventional technology) For steel reinforced concrete columns, the method of connecting the steel column and the reinforcing bars is different, so even if precast is used, the steel column and the reinforcing bars are connected separately, and then the joints are filled with post-cast concrete. and aimed at unification.

(Problems to be Solved by the Invention) As described above, according to the conventional construction method, the steel column part and the reinforcing bar part are joined separately, so there are few advantages in construction.

In addition, since the main reinforcement of the column is located on the outside of the steel column, this reinforcement gets in the way and makes it difficult to join the steel frame, making it generally difficult to precast steel reinforced concrete columns.

(Means for Solving the Problems) The present invention was proposed to solve these problems, and after assembling the steel column part of a steel reinforced concrete column, a part of the column main reinforcement and the tie reinforcements are removed. A built-in groove-shaped or L-shaped precast reinforced concrete outer shell member surrounds the steel column part, and the hook portions provided at the protruding ends of each tie bar in the adjacent outer shell members are crossed to intersect with each other. The present invention relates to a method for constructing a steel-framed reinforced concrete column, characterized in that after vertical reinforcement is inserted into the hollow portion, concrete is poured into the hollow portion surrounded by the respective outer shell members.

(Function) As described above, the present invention is an L-shaped or groove-shaped precast in which a part of the main column reinforcement and the tie bar are built in, and the protruding end of the tie bar from the end surface of the member is formed in the hook part. Using a reinforced concrete outer shell member, surrounding the steel column part of the steel reinforced concrete column with the outer shell member, and intersecting the hook portions of the ends of the stirrups of the adjacent outer shell members,
Vertical reinforcing bars are inserted through the intersections, and concrete is poured into the hollow part surrounded by the outer shell members using each of the outer shell members as a formwork, thereby connecting the steel column part and the precast reinforced concrete outer shell member. The steel frame and reinforced concrete columns will be constructed in one piece.

(Effect of the invention) According to the present invention, the steel column part and the reinforced concrete outer shell member are produced separately in a factory, the steel column part and the reinforced concrete outer shell member are separately joined on site, and the reinforced concrete outer shell member By using the members as formwork and pouring concrete into the hollow area surrounded by the same members, formwork work is no longer necessary, and construction is greatly simplified.

In addition, the above-mentioned precast reinforced concrete outer shell members of the above-mentioned shape or groove shape are integrated by the dowel action of vertical reinforcements inserted at the intersections of hooks provided at the protruding ends of adjacent stirrups, and are structurally The structure consists of highly reliable steel reinforced concrete columns.

(Example) The present invention will be described below with reference to embodiments shown in the drawings.

(1) is a channel-shaped precast reinforced concrete outer shell member that is a rectangular cylinder divided into two parts, and a column main reinforcement (2) placed at the corner and a band reinforcement (3) surrounding the column main reinforcement (2). is buried, both ends of the band reinforcement (3) protrude from the end face of the member, and a 90 degree hook (3a) is formed.

After assembling the column steel frame (4), the two precast reinforced concrete outer shell members (1) are attached to the column steel frame (4).
Assemble to surround. At this time, the hook portions (3a) at the ends of the straps (3) in adjacent outer shell members (1) must be made to intersect.

Next, after inserting vertical bars (5) into the intersections of the hook parts (3a), concrete (6) is poured into the hollow parts surrounded by the precast reinforced concrete outer shell members (1) to form the column steel frame. (4) and the precast reinforced concrete outer shell member (1) are integrated to construct a steel reinforced concrete column.

At this time, the hook portion (
By restraining the stirrup bars (3) by the dowel action of the vertical bars (5) inserted at the intersection of 3a), the reinforced concrete part becomes strong, and a column with the same performance as a normal steel reinforced concrete column can be created. configured.

FIG. 1 shows the case where the present invention is applied to an independent column. Figure 2 also shows a case where shear walls (7) are installed on both sides of a steel reinforced concrete column. In this case, the flange portion of the precast reinforced concrete outer shell member (1) is Make it short.

Fig. 3 shows an embodiment in which the present invention is applied when seismic walls are installed in four directions. In this case, the precast reinforced concrete outer shell member (1) is an L-shaped member made by dividing a square cylinder into four parts. configured.

Note that the precast reinforced concrete outer shell member (1)
As shown in Figure 4, the main reinforcement of the column (2) is connected by attaching a reinforcing bar joining sleeve (8) to the column base of the main reinforcement (2) built into the member (1). (8) or a lap joint at the base of the column.

In the figure, (9) is the beam, (10) is the slab, and the main column reinforcement (2)
protrudes from the slab surface by a length h necessary for joining the main reinforcement of the same column.

According to the illustrated embodiment, the column steel frame (4) portion and the reinforced concrete member made of the precast reinforced concrete outer shell member (1) are joined separately, and the outer shell member (1) is connected to the formwork. Since concrete is poured only in the cavity surrounded by the outer shell member (1), there is no need for formwork work, which greatly simplifies construction.

In addition, the precast reinforced concrete outer shell member (1) of the above-mentioned type or groove type has vertical reinforcements (5 )
They are integrated by dowel action to form a structurally reliable steel-framed reinforced concrete column.

Furthermore, according to the embodiment, the shear wall (7) and the steel reinforced concrete column can be easily joined.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design changes can be made without departing from the spirit of the present invention. .

[Brief explanation of drawings]

Figures 1 to 3 are cross-sectional plan views showing each example of a steel reinforced concrete column constructed by the method of the present invention, Figure 4 is a front view showing only the reinforced concrete part, and Figure 5 is a precast reinforced concrete column. FIG. 3 is a perspective view of the outer shell member. (1)...Precast reinforced concrete outer shell member,
(2)...Column main reinforcement, (3)...Top bar (3a)...
Hook part, (4)...Column steel frame (5)...Vertical reinforcement, (6
)... Concrete agent patent attorney 2 people including Kaihon Important Cultural Property Figure 3 Figure 4

Claims (1)

[Claims] After assembling the steel column part of the steel reinforced concrete column,
A groove-shaped or L-shaped precast reinforced concrete outer shell member containing a part of the column main reinforcement and a tie bar surrounds the steel column part, and is provided at the protruding end of each tie bar in the adjacent outer shell member. A method for constructing a steel-framed reinforced concrete column, the method comprising: intersecting hook portions and inserting vertical reinforcements into the intersecting portions, and then pouring concrete into a cavity surrounded by each of the outer shell members.