JPH02292429A - Joining construciton of pc post-girder - Google Patents

Abstract

PURPOSE:To join the lower-end main reinforcement of a PC girder accurately by placing the end sections of oppositely faced PC girders onto the capital of a PC post, projecting the main reinforcement of one PC girder in long size and joining the lower-end main reinforcement with the girder lower-end section of the other PC girder projected in short size. CONSTITUTION:A shearing reinforcing bar 3 is arranged onto the outer circum ference of the post main reinforcement 2 of a PC post A with a hollow section. A capital section 4 is installed integrally to the post capital section of the PC post A. Oppositely faced PC girders B are laid onto the capital section 4 of the PC post A. The girder lower-end main reinforcement 6 of one PC girder B is projected outside a post main reinforcement 1 while crossing a post-girder joining space, and joined on the capital 4 with the end section of a girder lower-end main reinforcement 6 projected in short size from the end face of the other PC girder B through gas pressure welding, etc., and concrete is placed. Accordingly, the girder reinforcement of the PC post-girder can be cemented accurately, thus increasing the rigidity and strength of joining sections.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a method for joining PC columns and beams in structures. (Prior art) Conventionally, in this type of joint construction method, the protruding end of the main reinforcement of a PC beam mounted on the capital of a PC column is bent so as to face into the column-beam joint space, and Various proposals have been made to secure the anchor of the main beam reinforcement.

(Problem to be solved by the invention) However, in the above construction method, the main reinforcement of the column and beam and the shear reinforcing reinforcement in the joint space are intertwined in a complicated manner, significantly worsening the working conditions, and the concrete is broken without ensuring the joint accuracy of the main reinforcement. Because concrete is poured into concrete, the adhesion performance of concrete to reinforcing bars may deteriorate, resulting in structural defects.

The present invention has been proposed in view of the problems of the prior art, and its purpose is to accurately and reliably join beam reinforcements in the joining space of PC columns and beams, and to prevent concrete pouring. Another object of the present invention is to provide a method for joining PC columns and beams in which filling is performed easily and reliably, and the rigidity and strength of the joint are improved.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the PC column beam joining method according to the present invention provides a PC column beam joining method that connects two PC beams that are placed on the cavity of a PC column and that are opposed to each other across the same column. , the lower end main reinforcement of one PC beam is made to protrude beyond the column-beam joint space, and is connected to the protruding end of the lower end main reinforcement of the other PC beam between the column main reinforcement on the capital and the end face of the other PC beam. After reinforcing bars are placed over the entire upper part of the capital, concrete is poured into the column-beam joint space.

(Function) According to the present invention, as described above, the ends of the PC beams are mounted on the capitals of the PC columns, and the PC beams facing each other across the PC columns are
Among the beams, the lower end main reinforcement that protrudes long from the end face of one PC beam is made to protrude outward beyond the column-beam joint space, and the lower end main reinforcement and the lower end of the beam that protrudes short from the end face of the other PC beam. easily on the capital between the outside of the main column reinforcement and the end face of the column without interfering with the column reinforcement, etc.
Moreover, it is possible to reliably join with high precision.

Further, according to the present invention, reinforcing bars are arranged throughout the upper part of the capital, concrete is placed in the column-beam joint space, and the panel zone is expanded to increase the rigidity of the bridge and increase the structural strength.

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

The column is a PC column with a hollow part (1), and shear reinforcing bars (3) are arranged around the outer periphery of the main column reinforcement (2). Furthermore, the PC
A cavity (4) is integrally protruded from the head of the pillar prisoner. In the figure (5) is the reinforcing bar of the capital (4).

A PC beam e is mounted on the cavity (4) of the PC pillar. In the figure, (6) is the main reinforcement at the lower end of the PC beam (Bl), (7) is the rib, and the upper end of the rib (7) is a PC beam with a thickness equal to that of the slab (from the upper end surface of Bl). It is installed protrudingly.

Therefore, among the PC beams + B) facing each other across the PC pillars,
The beam lower end main reinforcement (6) of one PC beam 《marked is made to protrude beyond the column-beam joint space to the outside of the column main reinforcement (1), and the beam lower end main reinforcement (6) that is shorter and protrudes from the end face of the other PC beam 《a ) is connected between the main reinforcement (1) on the caval (4) and the end face of the other PC beam (marked) via gas pressure welding, enclosure welding, or splice sleeve (8). In this case, the lower end main reinforcement bars (6) of the pair of opposing PC beams (B1) may be joined by either method shown in Figure 4 or Figure 5. Next, the reinforcing bars (2 'l, reinforcing ribs (9), shear reinforcing bars 00) (10'l), and beam top end reinforcements (10).

Next, the concrete 01 in the column hollow part (1) and the concrete in the panel zone formwork 021 on the cavity (4) (1
3') and concrete of the upper end of the beam and floor slab (13'l)
Pour the concrete.

Next, the PC columns (A') on the upper floor are erected, and the same procedure as described above is repeated to construct the frame.

The PC pillars include hollow prismatic pillars having a hollow part (1) of circular cross section as shown in Fig. 6, hollow prismatic pillars having a hollow part (1) of square cross section as shown in Fig. 7, and hollow prismatic pillars having a hollow part (1) of square cross section as shown in Fig. 8. It may be formed into a hollow column with an annular cross section. Moreover, FIGS. 9, 10, and 11 show the case where a sheath 04) for inserting the column main reinforcement is disposed in the hollow column shown in FIGS. 6, 7, and 8.

(Effects of the Invention) According to the present invention, as described above, among the PC beams facing each other across the studs mounted on the capital of the PC column, the main reinforcement at the lower end of one of the PC beams is connected to the column-beam joint space. The main reinforcement at the lower end of the other PC beam is connected to the protruding end of the main reinforcement at the lower end of the other PC beam, so that the main reinforcement and the P
P in sufficient space secured between C beam end.
The beam reinforcements of the C-beam can be easily and reliably connected to each other with high accuracy, concrete can be placed easily and reliably, and the adhesion of concrete to the reinforcement at the column-beam joint is improved.

Furthermore, according to the present invention, reinforcement reinforcement is placed over the entire upper part of the cavity and then concrete is poured into the column-beam joint space, so the rigidity and strength of the joint increases.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view showing the joint of PC columns and beams constructed by the method of the present invention, Fig. 2 is a view taken in the direction of the arrows 1 and 2 in Fig. 1,
Figure 3 is a view taken along arrows ■-■ in Figure 1, Figures 4 and 5 are plan views showing the joints of the lower end reinforcements of the opposing PC beams, and Figures 6 to 11 are the PC beams. FIG. 3 is a cross-sectional plan view of the pillar. - PC column, ts + - PC beam, (1) - 11 hollow section, (4) 1 capital, (6) - 11 beam lower end main bar, (8) 1 splice sleeve, (9
)1 Reinforcement reinforcement of panel zone, (lffl(lO'l - Shear reinforcement of panel zone, Q3) (13') (13")1 Concrete. Agent Patent attorney Shige Okamoto 1 extra person No. 1 figure

Claims (1)

[Claims] Among the PC beams facing each other across the same column mounted on the capital of the PC column, the lower end main reinforcement of one of the PC beams is made to protrude beyond the column-beam joint space, and the protruding end of the lower end main reinforcement of the other PC beam The main column reinforcement on the capital is connected to the end face of the other PC beam in the section, reinforcing bars are placed over the entire upper part of the capital, and then concrete is poured into the column-beam joint space. A method for joining PC columns and beams.