JPS62244946A - Method for rigid connection of beam and pc slab - 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 [Object of the Invention 1] The present invention relates to a method for rigidly joining a beam such as PC#A* or a beam cast on site to a PC slab.

Conventional methods for joining beams and PC slabs include, for example, as shown in Figure 5, a half-PC slab is built on the beam, and the necessary parts are attached to the joint and the upper surface of the half-PC slab. There was a method of placing reinforcement and then pouring top concrete on-site, or, as shown in Figure 6, there was a method of erecting PC slabs on top of the beams and filling the gaps between the joints with mortar.

Light is going to be L! However, in the conventional example shown in Figure 5, the beam and slab are rigidly connected, but it requires work such as placing reinforcement on the semi-PC slab and pouring top concrete, which reduces the construction period. On the other hand, although the conventional example shown in Fig. 6 above has been streamlined in terms of construction methods, the width of the beams is not sufficient, and the beams and slabs are separated by bins. There were problems such as poor bonding and structural insufficiency.

The present invention was made in order to solve the above-mentioned conventional problems, and its purpose is to achieve economical rigid joints of beams and PC slabs that are excellent in workability and can shorten the construction period. The purpose is to provide a method.

[Structure 1 of the Invention 1] The method of rigidly joining a beam/PC slab of the present invention is a method of joining a PC beam or a beam cast on site with a PC slab, and the PC slab built on the beam is The loop reinforcements protruding from the joint ends of the stirrups are overlapped from the left and right at the joint, and reinforcing reinforcements are placed as necessary. Then, the upper end beam main reinforcement is placed inside the stirrup so as to intersect with the loop reinforcements. The method is characterized in that reinforcement is arranged, and tied concrete is cast at the joint part for integral connection, and the loop reinforcement is oriented vertically or horizontally and protrudes from the joint end of the PC slab. It is characterized by the fact that

Dog (Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 indicates a reinforced concrete beam, which may be either a PC beam or a cast-in-place beam. The upper end of the stirrup 2 is exposed at the joint between the beam 1 and the slab.

On both sides 1fi 71 $ 1 a of the beam 1, the PC slab 3 is built with the joint end portion 3a of the PC slab 3 placed. Shakotsuta:)I'' is formed as necessary.

In addition, at the joint end ff1S3a of the PC slab 3,
Loop reinforcements 4 are provided protrudingly oriented in the vertical direction (slab thickness direction) at appropriate intervals. The loop reinforcements 4 protruding from the left and right PC slabs 3, 3 are arranged in an overlapping state at the joint on the beam 1.

These loop strips 4 may be placed one on top of the other in contact as shown in FIG. 1, or may be arranged with a certain distance between them. It is good if it is placed.

Reference numeral 5 indicates upper end beam main reinforcements, and several (three in this example) are perpendicular to the inner sides of the stirrup 2 and loop reinforcements 4.
It is reinforced. Furthermore, reinforcing bars 6 are arranged inside the tip portions of the loop bars 4.

After assembling the loop reinforcement 4 of the PC slab 3, the stirrup 2 of the beam 1, the upper end beam main reinforcement 5, etc. as described above, joint concrete C is poured into the joint part to complete the joining work.

Figures 3 and 4 show another embodiment in which the loop reinforcements 4 are oriented in the horizontal direction (direction parallel to the slab surface), and in this case, they extend upward and downward from the left and right I)C slabs 3. The stirrup 2 is assembled with the exposed upper part inserted into the stacked loop reinforcements 4, and then the upper end beam main reinforcement 5 is arranged and the non-N India concrete C is poured.

[Effects of the invention] 1.1) All PC slabs can be rigidly joined, so
Effective composite beams can be easily constructed, making it possible to reduce beam height and, as a result, to keep the entire building island low.

(2) The use of PC boards improves workability, shortens the construction period and reduces construction costs, making it an economical construction method.

(3) Depending on the width of the beam and the appearance of the cantilever slab, P
It can also be applied to rigid joints of C cantilever slabs.

[Brief explanation of drawings]

Fig. 1 is a plan view showing one embodiment of a beam-slab rigid joint structure according to the construction method of the present invention, Fig. 2 is a sectional view taken along line ■-n in Fig. 1, and Fig. 3 is another embodiment of the present invention. Example floor plan,
FIG. 4 is a cross-sectional view taken along the line W-■ in FIG. 3, and Pt55 and FIG. 6 are cross-sectional views according to the conventional construction method. 1... Beam, la... Shoulder, 2... Stirrup,
3...PC slab, 3a...joint end, 3b...
Charcotata, 4...Loop bar, 5...Top beam main bar, 6...Reinforcement bar. Figure 1

Claims (3)

[Claims] (1) In the method of joining a beam such as a PC beam or a beam cast on site with a PC slab, loop reinforcements protruding from the joint end face of the PC slab built on the beam are overlapped from the left and right at the joint, and the necessary After arranging reinforcing bars according to the above, the upper end beam main reinforcing bars are arranged inside the stirrup so as to intersect with the above-mentioned loop reinforcements, and joint concrete is poured at the joint part to make an integral connection. A method for rigidly joining beams and PC slabs. (2) The method for rigidly joining a beam and a PC slab according to claim 1, wherein the loop reinforcement is vertically oriented and protrudes from the joining end surface of the PC slab. (3) The method for rigidly joining a beam and a PC slab according to claim 1, characterized in that the loop reinforcement is horizontally oriented and protrudes from the joining end surface of the PC slab.