JPH032435A - Construction method for jointing column and steel frame reinforced-concrete beam to each other - Google Patents

Abstract

PURPOSE:To enable construction work to be easily executed in site by erecting an SRC joint body to be mounted on the upper section of a capital set at the capital section of a column having a hollow section in a column cross-sectional- area. CONSTITUTION:A capital 3 with a capital section reinforced with reinforcing bars 2 is integrally set to compose a PC column A. Besides, from a hollow steel frame column 6 composed of square steel pipes, end section steel frame beams C are branched to be cross-shaped, and between the end section steel frame beams C confronted with each other with the hollow steel frame column 6 placed between the beams C, a beam lower-end reinforcement 7 is set. Besides, a section excluding the panel zone of a beam section consisting of the beam lower-end reinforcement 7 and the end section steel frame reinforcement C is integrally formed with concrete, and a precast SRC beam C' is composed, and the SRC joint body C is manufactured. Then, an SRC joint body B is erected to be mounted on the capital 3 of the PC column A, and the steel frame column 6 is fitted into the hollow section 1 of the PC column A by 1/4 or more of a column length H.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for joining hollow PC columns and steel reinforced concrete beams.

(Conventional technology) When building a high-rise structure, the columns and beams on the lower N floors receive all the loads from the upper floors, so the cross sections of the members are made larger and the amount of high-strength steel is increased to create an SRC structure. Often.

(Problems to be Solved by the Invention) However, in the above-mentioned SRC structure, two types of steel materials, the steel frame and the reinforcing bars, have to be joined, which makes the joint complicated, resulting in a decrease in adhesion to concrete,
Conventionally, it has been difficult to prefabricate members, including joints, due to structural and construction problems such as deterioration of work precision and efficiency.

The present invention has been proposed in view of the problems of the prior art, and its purpose is to easily and quickly join the frame of hollow PC columns and SRC beams, and to provide sufficient rigidity. The purpose of this paper is to propose a method of joining columns and steel reinforced concrete beams with high structural reliability.

(Means for Solving the Problems) In order to achieve the above object, the method of joining a column and a steel reinforced concrete beam according to the present invention has a hollow part in the cross section of the column, and a capital is provided at the column head. On the top of the column, place the SRC shigou unit (precast) SRC beams combined so that they branch out in directions orthogonal to each other, and after placing reinforcing bars on the top end of the beam and the entire top of the capital, the unit It is configured to expand the panel zone by pouring concrete at the joints of the columns.

(Function) As described above, in the present invention, a capital is provided at the column head of a column having a hollow part in the column cross section, and the SRC beams are branched out from the upper part using the capital in directions perpendicular to each other. By mounting the SRC shiguchi unit combined in this manner, the unit can be easily attached to the column head.

Further, according to the present invention, after placing reinforcing bars on the upper end of the beam and the entire upper part of the capital, concrete is poured at the joint between the unit and the column, thereby enlarging the panel zone and forming the panel zone. This increases the rigidity and strength of the joints with steel reinforced concrete beams.

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

In Figures 1 to 3, there is a hollow part (1) in the cross section of the column.
A capital (3) reinforced with reinforcing bars (2) is integrally provided at the column head.

In the figure, (4) is the column main reinforcement, and (5) is the shear reinforcement.

(a is an SRC joint unit, in which end steel beams 0 branch out in a cross shape from a hollow steel column (6) made of square steel pipes, and end steel beams 0 face each other across the hollow steel column (6). (0
A beam bottom reinforcement (7) is placed between the beam bottom reinforcements (7).
) and the end steel beam (O) except for the panel zone are integrally molded with concrete to form a precast SRC beam (C').

The reason why the end steel beam (0 and the beam bottom reinforcement (7) at the orthogonal part of the SRC joint unit (81) were exposed without being covered with concrete was because the panel zone at the orthogonal part was concreted on site. (1st
(See Figures 3 and 6) In the figure, (8) indicates the horizontal lip disposed between the steel beam (O and the hollow steel column (6),
(9) is the rib of the precast SRC beam (C') part,
The reinforcement is arranged so that a part of it protrudes above the beam (C').

Then, the SRC Shiguchi Unit) +81 was mounted on the capital (3) of the PC pillar prisoner, and the steel frame pillar (6) was inserted into the hollow part (1) of the PC pillar ^ by a quarter of the company's president H. 1 or more are inserted.

Next, the precast steel columns facing each other with the hollow steel column (6) in between)
Beam top reinforcement GO) is placed between the SRC beams (C'), panel zone reinforcement θl) is placed over the entire upper part of the capital (3), and then the hollow part of the PC column (1 ), concrete 021 G3) 04) is placed on the slab at the entire upper surface of the capital (3), and the panel zone D) is expanded and formed.

Next, the SRC Shiguchi Unit) (steel column in Bl)
6) At the upper end protrusion, the hollow part (
1'), and the column main reinforcement (4) of the PC column on the lower floor via the splice sleeve 09 installed at the lower end of the column main reinforcement (4') of the same PC column (A'). Join.

At this time, the steel column (6) is configured to fit into the hollow part (1') of the PC column (A') on the upper floor by more than 1/4 of the height H' of the stud (A').

Thereafter, the above steps are repeated to construct the frame of the structure.

In the above embodiment, the SRC Shiguchi unit (Bl
Although the steel column (6) is made of a square steel pipe, it may be made of a circular steel pipe (6') as shown in FIG. (6#
).

In FIGS. 4 and 5, parts equivalent to those of the above embodiment are given the same reference numerals.

Furthermore, the Sl? The C-joint Yukoro unit is assembled into a cross-shaped planar shape for the center pillar, a T-shaped planar shape for the side pillars, and an L-shaped planar shape for the corner pillars.

FIG. 7 shows another embodiment of the present invention, in which the SRC joint unit (Bl is an end steel beam (0) and a beam bottom reinforcement (7) constituting a beam part, and a steel column is interposed in between. The unit fB] is mounted on the capital (3) of the PC column, and reinforcing bars are placed on the upper end of the beam and the entire upper part of the capital in the same way as in the example above, and then
Concrete will be placed on the slab in the hollow hollow section of pillar C.

In addition, when constructing the frame of the structure, as mentioned above, P
Attach the SRC Shiguchi Goro unit l to the capital of the column head (3) of the C column, and connect the beam bottom reinforcements (7) of the adjacent units (a) via the connector 0θ as shown in Figure 4. At the same time, concrete θ force is poured at the beam joints to connect the precast SRC beams (C'), or an intermediate precast SRC beam is placed between the precast SRC brackets (C#) of the adjacent units (B+). (C') is connected.

(Effects of the Invention) According to the present invention, precast SRC beams are combined to branch out in directions perpendicular to each other to form an SRC Shiguchi Goro unit, and the unit is mounted on a capital provided at the capital of a hollow column. By erecting the structure, on-site construction work can be carried out easily and quickly, and by unitizing the column-beam joints, manufacturing accuracy and work efficiency are improved. As described above, according to the present invention, the prefabrication rate is increased, the construction period is shortened, and construction costs are reduced.

In addition, after mounting it on the capital of the SRC Shiguchi Goro unit, reinforcing bars were placed on the upper end of the beam and the entire upper part of the capital, and concrete was poured at the joint between the unit and the column to expand the panel zone. By forming
The reliability of structural strength and rigidity is increased, and the present invention is most suitable for joining large span bridges to middle floors and lower floor differences in high-rise and super-high-rise structures.

Furthermore, the SRC joint units can be unified into three types, cross-shaped, T-shaped, and L-shaped, when viewed from above, making it easy to accommodate free blanking in design.

The invention of claim 2 is such that a beam portion consisting of an end steel beam and a beam bottom reinforcement is orthogonal to a steel column inserted into a hollow portion on each upper and lower floor of the SRC joint goro unit, and the beam portion excluding the panel zone is By integrally molding the unit with concrete, the unit can be installed across both the upper and lower companies, making it easier to connect columns and steel reinforced concrete beams on site.
Moreover, it was designed to be carried out reliably.

The invention of claim 3 provides the same structure by making the length of the portion inserted into the hollow part of each of the upper and lower PC pillars of the SRC Shiguchi Goro unit bone pillar to be 1/4 or more of the length of the length of each of the PC pillars. Each P
The SRC Shiguchi Goro unit can be firmly attached to the C pillar, allowing it to function as an SRC pillar.

The invention of claim 4 provides the SRC joint unit with the end steel beam and the beam bottom reinforcement constituting the beam portion orthogonal to each other without intervening steel columns, and the beam portion excluding the panel zone is made of concrete. The structure of the SRC Shiguchi Goro unit is simplified by integrally molding the structure.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an accommodation facility showing the implementation status of an embodiment of the method of joining a column and a steel reinforced concrete beam according to the present invention, and Figs. View of national interest■−■
4 and 5 are cross-sectional plan views showing the implementation status of other embodiments of the present invention, and FIGS. 6 and 7 are SR
It is a front view which shows each Example of a C-shiguchi unit. Prisoner...PC column, (Bl...SRC joint unit, (q...end steel beam, (C')...precast) SRC beam, (1)...-hollow part, (3 )
... Capital, (6) ... Hollow steel column, (7)
... Beam bottom end reinforcement, 00... Beam top end reinforcement, 01)...
・Panel zone reinforcement, 0210■04...Concrete. j! 5 flashes

Claims (1)

[Claims] 1. An SRC shingle in which precast SRC beams are combined so as to branch out in directions orthogonal to each other at the top of a column that has a hollow part in its cross section and a capital provided at the column head. A column and steel frame characterized in that after the unit is mounted and reinforcing bars are placed on the upper end of the beam and the entire upper surface of the capital, concrete is poured at the joint of the unit and the column to form an enlarged panel zone. Connection method with reinforced concrete beams. 2. The SRC joint unit is connected to each PC on the lower and upper floors.
Claim 1: A beam section consisting of an end steel beam and a beam bottom reinforcement is orthogonal to a steel column inserted into a hollow part of the column, and the beam section excluding the panel zone is integrally molded with concrete.
Connection method for the listed columns and steel reinforced concrete beams. 3. The column according to claim 2, wherein the length of the portion of the steel column of the SRC joint unit inserted into the hollow part of each PC column on the upper and lower floors is 1/4 or more of the length of the PC column on each floor. and steel reinforced concrete beams. 4. In the SRC joint unit, the end steel beams and beam bottom reinforcements that make up the beam section are orthogonal to each other without intervening steel columns, and the beam section excluding the panel zone is integrally molded with concrete. 2. A method for joining a column and a steel reinforced concrete beam according to claim 1.