JPS58164848A - Connection structure of pc small beam - 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] The present invention relates to a PC beam joint structure.

Conventional beams are constructed of steel frames, and their ends are pin-connected with bolts to the gusset plates of the steel beams, which requires a large amount of steel, lacks continuity at the joints, and limits seismic performance. Ta.

The present invention eliminates the above-mentioned drawbacks, and its structural features are as follows: 1. A connecting plate fixed to the end of the beam main reinforcement of the PC beam is joined to a connecting plate protruding from the PC beam. This is where connecting bars are placed above the PC beam and PC beam.

Embodiments of the present invention will be described below with reference to the drawings.

In Figures 1 and 2, there is a PC beam 2 on the top of the PC shear wall 1.
In this example, it is provided integrally, and the beam main reinforcements 3 are arranged inside this culvert. Angle members 4, 4a and 5, 5a, which are a pair of joint plates, are fixed to the beam main reinforcements 3 facing each other, and each angle member 4, 4a and 5, 5a is attached to both sides of the beam 2. They each protrude outward. And each angle member 4.4a and 5,5a has a PC beam 2
The PC beams 6 and 6a or n located on both sides of the PC are connected to each other.

The PC beam 6 is made of RC construction, and the end tips of the main bars 8 and 9 of the beam around which the stirrup 7 is wound protrude from the ends of the beam in the illustrated example. At the ends of the main reinforcements 8.9, connecting plates 10, 11 that connect the upper and lower main reinforcements are fixed to face each other, and the ends of each connecting plate protrude from the ends of the small beams. One joint plate 10 is connected to one joint plate 4 protruding from the right side surface of the beam 2, and the other joint plate 11 is connected to a joint plate 4a by bolts.

The other PC beam 6a has substantially the same configuration as the PC beam 6 described above, and raJ is used for each component of the PC beam.
is attached to clarify the correspondence relationship. This small beam 6a is also made by overlapping the joining plates 10a, lla and the joining plates 5, 5a of the beam 2 and joining them with bolts. 1 Also beam 2 and PC small beam 6. -, :, A connecting bar 12 is passed through the upper part of 6 a, and this connecting bar connects the beam and PC/1.
・Ensures the integrity of the joint with the beam. Stirrups 13 are wound around the connecting bars 12 and the lower end main bars 9, 9a in the PC beams 6, 6a.

Note that the upper main reinforcements 8, 8a of the PC beams 6, 6a may not be buried in the beams, but may be arranged above the beams.

14 is an anchor bar protruding from the upper surface of the beam 2;
It overlaps with the anchor reinforcement 14a of the PC shear wall 1a on the upper floor.

Next, construction will be explained.

First, the PC shear wall 1 is erected, and then the PC beam 6 is hung on one side of the beam 2 using a crane, and the joint plate 10 at one end is connected to the joint plate 4 of the beam 2, and the joint plate 11 is connected to the joint plate 4a. Polymerize,
By connecting with bolts, the work of joining one PC beam 6 to the beam 2 is completed. Similarly, the PC beam 6a is hung on the other side of the beam 2, and the joining plates 10a and lla are joined to the joining plates 5 and 5a. After the ministry, Liang 2 and PC Xiaoliang 6
゜6a Connecting pin □: Pass 2 through the upper blade, and then set K on the formwork below the joint between beam 2 and small beam 6, and then pour concrete I) -) C. As a result, PC small beam 6.
The continuity of the joint between the beam 6a and the beam 2 is ensured by the connecting bar 12.

Figure 3.4 shows another embodiment of the PC beam connecting plate. In this example, channel steel is used as the connecting plate for the PC beams 6 and 6a, and the fixed connecting plates 15 and 15a are fixed between the ends of the main bars 8, 9 and 8a, 9a of the beam. That is, on both sides of the joint plate 15, the main reinforcements 8, 9 and 8,
9 are fixed by welding, and the relationship between the other joining plate 15a and the main reinforcing bars 8a, 9a is also the same as above. The joining plates 15 and 15a are joined to the joining plates 4, 4a and 5, 5a of the beam 2 by bolts. In addition, the lower portions of the ends of the PC beams 6 and 6a extend toward the beams 2 with protrusions 16 and 1.
6a is installed protrudingly and serves as a formwork during concrete pouring. Ka is the formwork.

As explained above, according to the present invention, the connecting plate protruding from the end of the PC beam of RC construction is connected to the connecting plate of the PC beam, and the connecting bars are arranged above the PC beam and the beam. Therefore, the amount of steel material can be reduced, reducing construction costs, ensuring continuity of joints, and preventing deterioration in seismic performance.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the connection state of the PC beam and PC beam, Fig. 2 is a sectional view taken along line n-n in Fig. 1, and Fig. 3 is the connection state of the PC beam and PC beam of another embodiment. FIG. 4 is a cross-sectional view taken along line nn in FIG. 1. 2-PC beam, 4, 4 a, 5, 5 a...
・Joint plate, 6゜6a-P C beam, 7, 7 &
... Stirrup, 8° 8 a, 9, 9 a-
・-Main reinforcement, 10, 10a, 11゜Zla... joint plate,
12 River connection, 13... stirrup, 15, 15a
...joint plate. Patent Attorney Patent Attorney Matsu 1) Kazuko Kazuko Patent Attorney Shinme Kodaira 2571

Claims (2)

[Claims] (1) A PC beam with joint plates or projecting from both sides,
PC beams arranged on both sides of this PC beam, the ends of which are facing the connection plate, main reinforcements of the small beams that are reinforced on this PC beam, and fixed to the ends of the main reinforcements, A connecting plate that protrudes from the end of the PC beam and is connected to the connecting plate, a connecting bar that is reinforced above the PC beam and the PC beam, and a lower side of the connecting bar and the main bar. A joint structure of PC beams, which is equipped with stirrups that hang around the main reinforcement located at the . (2) The PC beam joint structure according to claim 1, characterized in that the end tip of the main reinforcement of the small beam is located outside the end of the PC beam.