JPH01102142A - Construction of high building made of reinforced concrete - Google Patents

Abstract

PURPOSE: To simplify a field work by placing concrete in a beam joint part and a floor part after concrete is placed up to a beam lower end of an element set at a predetermined position so as to incorporate a beam reinforcing bar to a steel framework beam. CONSTITUTION: An element A in which column main bars 1 and column hoop bars 2 are previously assembled to the outer peripheries of steel framework columns (a) after a steel framework beam (b) is coupled to intermediate parts of the steel framework columns (a), is set at a predetermined position, and then concrete in a column-like form is placed up to the lower ends of the steel framework beams (b). Next, upper beam bars (d) each of which is formed by incorporating a stirrup upper bar 6A to beam main bars 4, 5 are dropped onto thin stirrup lower bars 6b laid in the lower part of the steel frame beam (b) from the upper part of the steel framework beam (b), and after the stirrup upper bars 6A and the stirrup lower bars 6B are coupled with each other, concrete is placed in the columns, the beam joint parts and a floor part. With this arrangement, a major part of the reinforcing bar arrangement can be carried out on the ground, thereby it is possible to simplify the field-work.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a construction method for a high-rise steel-framed reinforced concrete building.

(Prior art) Conventionally, in this type of construction method, steel columns are erected at predetermined positions, the steel columns are connected with steel beams to assemble a steel frame, and column reinforcing bars and beam reinforcing bars are attached around the outer periphery of the steel columns. were assembled in sequence and concrete was poured.

(Problems to be Solved by the Invention) Therefore, the above-mentioned conventional construction method requires a lot of effort, and each reinforcing bar for each column and beam is laid out in one tree on site, so it takes a lot of time to do the reinforcing work. There was also the problem that accurate reinforcement could not be arranged.

(Means for Solving the Problems) The present invention was proposed in order to solve various problems, and it is possible to use steel reinforcement elements, which are steel reinforcement beams assembled in the middle part of steel reinforcement columns, horizontally and In the construction method for steel-framed reinforced concrete buildings, which assembles a steel-framed reinforced concrete frame by jointing it in both directions, column reinforcing bars are first assembled around the outer periphery of the steel column, column elements are installed at predetermined positions, and then the column concrete is attached to the bottom end of the beam. After the steel beams were cast, a gate-shaped stirrup upper reinforcement with an open bottom end was installed across the upper and lower beam main reinforcements to the groove-shaped stirrup lower reinforcement with an open top end that was incorporated into the lower part of the steel beam. A high-rise steel-framed reinforced concrete structure, characterized in that the upper beam reinforcement is dropped from the top of the beam, the stirrup upper reinforcement and lower reinforcement are connected, and then concrete is poured for the beams, columns, and beam joints together with the floor slab. This relates to the construction method of buildings.

(Function) According to the present invention, as described above, a steel element in which a steel beam is assembled in the middle part of a steel column is connected to the vertically adjacent steel columns and the horizontally adjacent steel beams, thereby making it possible to move both vertically and horizontally. The steel frame can be easily and quickly assembled by joining the steel frame to the steel frame.

The element is then erected by pre-assembling column reinforcing bars on the steel column of the element and groove-shaped stirrups with an open top at the lower end of the beam steel frame.

Next, after pouring column concrete up to the bottom end of the beam, the pre-assembled upper beam reinforcement with a gate-shaped stirrup upper reinforcement with an open bottom end that spans the upper and lower beam main reinforcements is installed from the top of the steel beam to the bottom of the same beam. The beam reinforcing bars are assembled by dropping them into the groove-shaped stirrup lower bars with an open upper end and connecting both the upper and lower stirrup bars, and then the beam and column-beam joint concrete is poured along with the floor slab concrete. Then, the above-mentioned construction method is sequentially applied to the upper floors to construct a steel-framed reinforced concrete high-rise building.

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

(7! is a steel frame element in the shape of a rectangle, cross, T-shape, etc., which is assembled by joining the steel beam (1) to the middle part of the steel frame m (a>) in advance, and is attached to the outer periphery of the steel column (IL). The column main reinforcement (1) is pre-assembled at a predetermined position via spacers, etc., and the portion of the column main reinforcement (1) up to the bottom end of the beam is the column hoop reinforcement (2).
is surrounded. In the figure, (3) is a sleeve for connecting the reinforcing bars at the lower end of the column main bar (1). (Refer to Figure 4) The steel frame (A) is erected in the specified position, and the adjacent steel beams (1) (1) of (A) are connected as shown in (0). , pour concrete for the column up to the bottom end of the beam.

Next, as shown in Fig. 5, the upper and lower beam main reinforcements (4) (Fl)
, the open gate-shaped stirrup top reinforcement (6A) already attached to the lower end of the steel beam or the built-in top beam reinforcement (
+1) from the top of the steel beam ('b) as shown by the arrow p, and fixed reinforcing bars (7) at the bottom of the steel beam ('b).
The upper end installed through the groove is opened and fixed to the large groove type stirrup lower reinforcement (6B) to assemble the beam reinforcement.

In the figure, (8) is an auxiliary reinforcement installed in advance in the stirrup lower end reinforcement (6B).

Next, concrete (9) (II) for the beam and column joints is poured together with the floor slab (B).

Next, the steel column (a) of the steel frame (A) on the upper floor is connected to the steel column (a) of the steel frame (A) as shown by the bullet, and each pouring main reinforcement (1) is Hoop reinforcement is connected through the sleeve (3) to the lower end of the upper beam, and the same steps as described above are repeated to construct a steel reinforced concrete high-rise building.

(Effects of the Invention) According to the present invention, a steel frame can be easily and quickly assembled by connecting steel elements in which steel beams are assembled to the intermediate portions of steel columns both horizontally and vertically. It is something.

Further, according to the present invention, column reinforcing bars are pre-assembled around the outer periphery of the steel column in the steel frame element, and the beam reinforcing bars are divided into star 2 tube lower reinforcement with a stirrup groove cross section and stirrup upper reinforcement with a portal cross section. The stirrup upper reinforcement is incorporated into the upper and lower beam main reinforcements, and the pre-assembled leading end beam reinforcement is lowered from the upper part of the steel beam and connected to the stirrup lower end reinforcement incorporated in the lower part of the steel beam, thereby forming a beam. The invention involves assembling reinforcing bars, and according to the present invention, most of the reinforcing work is done above ground, and on-site, the reinforcing bars that have been previously assembled are assembled on the above ground. In addition, since most of the steel frames and reinforcing bars are assembled above ground, the steel frames and reinforcing bars can be placed precisely in the predetermined positions, making it possible to construct highly reliable steel-framed reinforced concrete high-rise buildings.

[Brief explanation of the drawing]

Figure 1 is a front view of a steel frame assembled by the method of the present invention, Figure 2 is a cross-sectional plan view of a column and beam joint constructed by the method of the present invention, and Figure 3 is a cross-sectional view of a beam and deck joint constructed by the method of the present invention. FIG. 4 is a longitudinal sectional view, FIG. 4 is a slope view of a steel frame element, and FIG. 5 is a longitudinal sectional view showing the state of reinforcing beam reinforcement work. (A)... Steel frame element (B)... Floor slab (a
)... Steel column (1)) -... Steel beam (1
)...Column main reinforcement (4)...Top beam main reinforcement (
5) Lower beam main reinforcement (6A) Stirrup upper reinforcement (6B) Stirrup lower reinforcement (9) Beam concrete Ql Column and beam joint concrete agent Patent attorney Shige Okamoto 2 other people Figure 1 Figure 2

Claims (1)

[Claims] In the construction method for steel-framed reinforced concrete structures, in which steel-framed reinforced concrete structures are constructed by assembling steel-framed reinforced concrete frames by joining steel-framed reinforced beams in the middle of steel-framed reinforced columns in both horizontal and vertical directions, column reinforcing bars are attached to the outer periphery of the steel-framed columns. After installing the pre-assembled column element in the specified position and pouring column concrete up to the bottom end of the beam, install the groove-shaped stirrup lower reinforcement with an open top built into the lower part of the steel beam, and connect it to the upper and lower beam main reinforcement. The upper beam reinforcement, in which the gate-shaped stirrup upper reinforcement with an open lower end is incorporated, is lowered from the upper part of the beam, the stirrup upper reinforcement and the lower reinforcement are connected, and then the beam, column, and beam are assembled together with the floor slab. A construction method for high-rise steel-framed reinforced concrete buildings characterized by pouring concrete at joints.