JPH0518007A - Pc column having joining section of structural steel beam therewith - Google Patents

Abstract

PURPOSE:To manufacture easily a PC column to be jointed a structural steel beam, and to make it possible to join both of them firmly with each other. CONSTITUTION:A ring plate 2 is placed to an outside position or an inside position from the outside of a PC column 1. A diaphragm 3 provided to the inside of the PC column is welded to the ring plate 2 together as a unit in a position opposed to up and down flanges of a structural steel beam 4 welded to the outside of the ring plate 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PC column having a built-in joint with a steel beam.

[0002]

2. Description of the Related Art The shortage of construction workers and steel frame fabricators in recent years is serious, and it is necessary for the construction industry to cope with the above situation by industrializing and simplifying on-site workers like other industries. Is becoming Therefore, as a method of using a steel frame for the beam and a precast reinforced concrete column for the column, there are those disclosed in JP-A-1-90336 and JP-A-1-52936. In the former publication, a beam-joining sleeve that horizontally penetrates the column is embedded in the beam-joining position, and the stirrup is densely arranged around the sleeve and steel fiber concrete is placed to form a precast reinforced concrete column. .. After the erection of the pillar is completed, the joint plate provided on the end surface of the beam steel frame is brought into contact with the beam joint position of the pillar, and the high-strength bolt is inserted and tightened across the joint plate and the sleeve.
Next, the sleeve is filled with mortar. In the latter construction method, the reinforced concrete column and the steel beam are joined by bolting the beam-joining metal item embedded in the reinforced concrete column and the beam-connecting metal item bolted to the steel beam.

[0003]

[Patent Document 1] Japanese Unexamined Patent Application Publication No.
In the method disclosed in Japanese Patent No. 90336, it takes a lot of time to manufacture a precast reinforced concrete column on site, and since it is only joined by a high-strength bolt that penetrates a sleeve in the column, the integration with the column is poor. Will be things. Further, the method disclosed in Japanese Patent Laid-Open No. 1-52936 requires labor in order to maintain the accuracy of embedding the battledore-shaped beam joint fitting, and has a problem in strength.

A joining method shown in FIGS. 5 and 6 has also been proposed. However, since the beam joining member is projected on the outer peripheral surface of the PC column, the frame for manufacturing the PC column becomes complicated, and the PC is produced.
Since the diaphragm provided outside the pillar is large, the welding length at this site becomes long and there is a limit to the labor saving at the site.

It is an object of the present invention to easily manufacture a PC column and to join it to a steel frame beam, and to firmly join the two.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and a ring plate is arranged at the outer surface position of the PC pillar or inside the outer surface and is arranged in the PC pillar. The diaphragm that faces the upper and lower flanges of the steel beam to be joined is welded and integrated with the ring plate at the joining position, and a hole or notch for inserting the column main bar into this diaphragm as needed is provided with the column main bar. The gist is that it is set slightly larger than the outer diameter and the beam joint surface is inside the column surface.

[0007]

When the precast reinforced concrete column 1 is manufactured, since the joint member with the steel beam is provided so as to be built in the PC column, the PC column manufacturing form having a single cross section over the entire length of the form can be obtained. Since the conventional one can be used, the manufacturing becomes easy. Further, since it is not divided by the joining member, the structure for maintaining strength and precision becomes simple. Further, a ring plate 2 arranged so as to cover the outer periphery of the PC column is integrally provided at a position where the PC column 1 is joined to the steel beam, and an upper flange portion of the steel beam to be joined at the upper and lower parts of the ring plate 2 and Opposite the position of the lower flange, P
Since the diaphragm 3 is disposed transversely across the C pillar, the load applied to the steel beam is surely transmitted to the PC pillar via this diaphragm, and the joint is strengthened. Further, also for the connection with the steel frame beam, the web portion is bolted through the gusset plate 5 protruding from the ring plate, and the upper and lower flange portions are directly welded to the diaphragm or the ring plate, but the welding length is short. It is possible to save labor on site.

[0008]

The present invention will be described below with reference to the illustrated embodiments. In the figure, reference numeral 1 is a precast reinforced concrete column (PC column) having a required diameter and length, and a required number of column main bars 6 are embedded inside so as to have a required strength.
Further, a hoop muscle (not shown) is arranged on the outer periphery of the main pillar muscle 6 as necessary. When manufacturing this PC pillar 1 using a normal formwork, the joint position with the steel beam 4 is previously placed in the formwork,
A ring plate 2 having the same size as or a little smaller size than the PC pillar 1 is arranged so that the concrete of the PC pillar and the ring plate 2 are integrated at the time of concrete filling and placing. Therefore, this ring plate 2
The outer surface of the PC column is flush with the outer surface of the PC column 1, or slightly inward as shown.

Further, inside the PC pillar 1, diaphragms 3 are arranged so as to traverse the PC pillar in the horizontal direction or in the horizontal direction. The diaphragm 3 transfers the load applied to the steel beam 4 joined to the PC column 1 to the PC column 1 and the steel beam oppositely sandwiching the PC column 1, and is a thick plate having a preset strength. The steel beam 4 is provided in the positions of the upper flange portion 41 and the lower flange portion 42, respectively. When the diaphragm 3 is arranged inside the ring plate 2 as shown in FIG. 1, the end surface of the diaphragm 3 and the contact surface of the ring plate 2 are welded to each other. Further, as shown in FIG. 3, when contacting the upper and lower end surfaces of the ring plate 2, the upper and lower end surfaces of the ring plate and the contact surface of the diaphragm are welded.

Therefore, the diaphragm 3 is attached to the ring plate 2
The diaphragm 3 and the ring plate 2 are preliminarily welded to each other to be integrated, regardless of whether they are arranged inside or on both upper and lower end portions, and they are housed in a mold and incorporated when concrete is filled.

Further, this diaphragm 3 is provided with holes 7 as needed in order to more firmly join with the concrete to be filled, and the concrete filled in the holes 7 ensures that the upper and lower surfaces of the diaphragm 3 are made of concrete. A notch 3K or a hole 3H that is slightly larger than the outer diameter of the column main bar 6 may be provided so that the column main bar 6 can be inserted into and integrated with the column main bar 6.

Next, the production of the precast reinforced concrete column 1 having a built-in joint with the steel beam will be described. The concrete pouring method at the time of constructing the PC pillar 1 may be either ordinary flat casting or centrifugal molding, but the ring plate 2 having the diaphragm 3 welded thereto is disposed in a predetermined form, and the pillar main bar 6 Is arranged, the column main bars 6 and the ring plate 2 are assembled, and concrete is filled in the formwork. In this case, since the holes 3 are formed in the diaphragm 3, the filling property of concrete is improved.

After demolding and curing the formwork, on-site steel beam 4
The gusset plate 5 for bolting to the web portion 43 is welded. And when joining the steel beam 4, PC
The steel beam 4 is brought into contact with a predetermined position of the pillar 1, and the upper and lower flange portions 41 and 42 are directly welded to the outer surface of the ring plate 2 or the end surface of the diaphragm 3 and bolted to the gusset plate 5. In this case, the welding length is only the width of the upper and lower flange portions of the steel beam, and the welding length is minimized, and the work is simplified.

[0014]

[Effects of the Invention] PC incorporating a joint with a steel beam of the present invention
Since the pillar has a ring plate that is a joint member with the steel beam built into the PC pillar, the formwork to be used is simple, and the PC
The manufacturing of the column is simplified and the diaphragm that transmits the load of the steel column is built into the PC column, and the steel beam is directly connected to it, so the strength is large and the welding length that requires on-site skill is minimized. You can stay. Further, by arranging the beam joint portion inside the column surface, the beam joint portion can be downsized and the amount of steel used and the fireproof coating can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a beam joint portion of a PC column having a joint portion with a steel beam of the present invention built therein.

FIG. 2 is a plan view of the same.

FIG. 3 is a vertical cross-sectional view showing a beam joint portion according to another embodiment of the present invention.

FIG. 4 is a plan view of the same.

FIG. 5 is a known vertical sectional view.

FIG. 6 is a plan view of the same.

[Explanation of symbols]

 1 PC column 2 Ring plate 3 Diaphragm 4 Steel beam 5 Gazette plate 6 Column main bar

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Teruo Matsutani 1-9-10 Kusuhanoda, Hirakata-shi, Osaka (72) Inventor Yasuhiro Tsukuda 5-343 Urari, Midori-ku, Nagoya-shi, Aichi (72) Inventor Junichiro Ishida Osaka 3-103-16 Domyoji, Fujiidera City, Fukushima Prefecture (72) Inventor Yoshihiko Utsumi 14-21 Midorigaoka, Okubo Town, Akashi City, Hyogo Prefecture

Claims (1)

Claim: What is claimed is: 1. A steel frame in which a ring plate is arranged at an outer surface position of the PC pillar or inside the outer surface, and a diaphragm arranged in the PC pillar is joined to the outside of the ring plate. A PC pillar having a joint with a steel beam, which is integrally formed by welding with the ring plate at a position facing the upper and lower flanges of the beam.