JPS59199943A - Pole leg connecting structure of pc pole - 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 an improvement in the column base joint structure of a PC column.

Figure 1 shows the column base joint structure of a conventional PC column.
The upper end of the anchor reinforcing bar (2) planted on the PC column (
A sleeve (7) with a grout injection hole (5) at the lower end and an air vent hole (6) at the upper end is fitted over the lower end of the column main reinforcement (4) in 3), and the grout injection hole (The column base joint of the PC column is constructed by injecting grout (8) into the sleeve (5).

In the figure (9) is the mortar.

However, when applying the above conventional method to the column base in a prefabricated rigid frame structure, the diameter and rigidity of the three/3 are larger than the main reinforcement, so a sufficient yield hinge cannot be formed at the end of the member, and the yield of the reinforcing steel is mainly caused by the column base. , occurs within the beam joints, which has major drawbacks such as deteriorating the restoring force characteristics of the frame.

On the other hand, in the case of rigid frame prefabricated structures, it is preferable to use a construction method in which joints are provided on column bases.

The present invention has been proposed for the purpose of providing an improved column base connection structure for PC columns that eliminates the above-mentioned conventional drawbacks, and is intended to provide a column base connection structure that eliminates the above-mentioned conventional drawbacks. In the column base joint structure of a PC column in which the lower end is connected via a sleeve, a guide pipe with low bending rigidity is connected to the lower part of the sleeve, and a yield hinge is formed at the position of the guide pipe. This is a characteristic feature.

In the present invention, as described above, a guide pipe with low bending rigidity such as a flexible tube is connected to the lower part of the sleeve that joins the reinforcing bars erected on the floor and the lower end of the main reinforcing bars of the PG column. The strength is equivalent to that of the conventional sleeve joint structure, and the yield hinge is P
Since it is formed at the position of the guide pipe located at the end of the material of the C column, the member performance is equivalent to that of a conventional integrally cast column, and the drawbacks of the conventional column base joint structure are eliminated.

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

Column main reinforcement (
12) The lower end of the sleeve (15) is inserted into the upper half of the sleeve (15) having the cloud column entry hole (13) and the air vent hole (14), and the reinforcing bar (17)' is anchored to the floor (16). The protruding end of the surface is connected to the lower end of the sleeve (15) and is constructed of a grout injection hole (1) such as a flexible tube with low bending rigidity and configured not to be deformed during concrete pouring.
8) is inserted into the lower half of the protruding sleaze (15) through the guide tube (19) provided at the lower part, and the grout (20) is injected through the injection hole (18) so that the grout (20) After confirming that the grout begins to come out from the injection hole (13),
Fit a rubber stopper into the injection hole (13), and then fill it with grout (2).
0) has reached the air vent hole (14),
A rubber stopper is fitted into the circumference (14) and the injection hole (18), and the guide tube (19) and the sleeve (15) are injected and filled with grout (20) to form the base of the PC column (11). It is used to join. In the figure (21) is the mortar.

Therefore, according to the PC column base joint structure shown in the figure, a joint structure equivalent to the conventional joint structure can be obtained, and since the yield hinge is formed at the position where the guide pipe (19) is disposed, it is possible to It provides the same member performance as a hammered pillar.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of a conventional PC column base joint structure;
The figure is a longitudinal cross-sectional view showing an embodiment of the column base joint structure of a PC column according to the present invention. (11)...PC column, (12)...Column main reinforcement, (15
)...sleeve, (16)...floor, (17)...
Reinforcing steel, (19)...Guidance letter agent Patent attorney Okamoto
Important: 2 people outside the text Figure 1 Figure 2

Claims (1)

[Claims] In a column base joint structure of a PC column in which a reinforcing bar erected on the floor and a lower end of the column main reinforcement are joined via a sleeve, a guide pipe with low bending rigidity is connected to the lower part of the sleeve,
A PC column base joint structure characterized by forming a yield hinge at the same guide tube position.