JPH0280729A - Junction structure of steel-pipe concrete pole and beam - Google Patents

Abstract

PURPOSE:To ensure the adhesion of a steel pipe and concrete, and to facilitate the filling of concrete by interposing the steel pipe with an inner surface rib between an upper steel-pipe column and a lower steel-pipe column through welding and butting and fixing a beam onto the outside surface of the steel pipe through welding. CONSTITUTION:A thick steel pipe 3 with inner surface ribs, to an inner surface of which a plurality of ribs 4 are projected, is interposed between an upper steel-pipe column 1a and a lower steep-pipe column 1b through welding, and the insides of the steel-pipe columns 1a, 1b and the steel pipe 3 with the ribs are filled with concrete 2. Beams 5, 5 are joined with the outside surface of the steel pipe 3 with the ribs by butting and fastening the end sections of the beams through welding. The adhesion of the steel pipes 1a, 1b, 3 and concrete 2 is ensured because the steel pipe 3 with the inner surface ribs is used while the filling of concrete 2 is not prevented and concrete is filled easily because the inside diameters of the ribs are not reduced largely.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a joint structure of a steel pipe concrete column and a beam.

(Prior art) Conventionally, in order to join a beam to a steel pipe concrete column, a stiffener ring was attached to the outside of the column to reinforce it.
A method of providing a diaphragm inside a steel pipe is known.

However, these methods have been accompanied by problems such as insufficient adhesion between the steel pipe and concrete and difficulty in filling the steel pipe with concrete.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, and enables sufficient adhesion between the steel pipe and concrete, and allows easy filling of concrete into the steel pipe. Steel pipe concrete 1 - Column and beam connection The purpose is to provide structure.

(Means for Solving the Problems) In order to achieve the above-mentioned objects, the present invention provides (1) a steel pipe with a thick internal rib, which is interposed by welding between an upper steel pipe column and an upper steel pipe column; The present invention proposes a joint structure of a steel pipe concrete column and a beam, which is composed of concrete filled inside the steel pipe and a beam fixed against the outer surface of the steel pipe with internal ribs.

(Function) (1) Since the joint structure of the present invention uses a steel pipe with internal ribs, sufficient adhesion between the steel pipe and concrete can be ensured.

(2) In the joint structure of the present invention, the inner diameter of the inner diameter of the inner ribbed steel tube tube is not significantly reduced, so that it does not interfere with concrete filling.

(Example) The joint structure of a steel pipe concrete column and a beam according to the present invention will be described below according to an example shown in the drawings.

Figures 1 and 2 show a joint structure of the present invention, which includes a steel pipe (3) with internal ribs interposed by welding between a lower adjustment pipe column (1a) and a lower adjustment pipe column (1b). have

The inner ribbed steel pipe (3) is thick-walled and has a plurality of ribs (4) protruding from its inner surface.

Next, the insides of the lower adjustment pipe column (1a), the steel pipe with internal ribs (3), and the lower adjustment pipe column (1b) are filled with concrete 1-(2).

On the other hand, the ends of the beams (5) are butt-fixed to the outer surface of the inner ribbed steel pipe (3) by welding.

The operation of the steel pipe concrete column and beam joint structure of the present invention shown in the above embodiments is as follows.

That is, the force (especially shear force) from the beam (5) is transmitted to the inner ribbed steel pipe (3).

The inner ribbed steel pipe (3) is firmly attached to the concrete (2) at the rib (4), so the inner ribbed steel pipe (
The force applied to 3) is sufficiently transmitted to concrete 1-(2).

(Effects of the Invention) The embodiments of the joining structure of the present invention are as described above, and the effects thereof are listed below.

(1) The joint structure of the present invention particularly uses steel pipes with internal ribs, so it can ensure sufficient adhesion between the steel pipe and concrete. (2) The joint structure of the present invention particularly uses steel pipes with internal ribs whose inner diameter is greatly reduced. Since it is not a concrete material, it does not interfere with concrete filling.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the joint structure of the present invention. Fig. 2 is a cross-sectional view taken along line n-n. 1a: Lower pipe column 1b 2 Lower steel pipe column 2: Concrete 3: Steel pipe with internal ribs 4: Rib 5:
To Liangji

Claims (1)

[Claims] 1. A thick-walled steel pipe with internal ribs interposed by welding between an upper steel pipe column and a lower steel pipe column, concrete filled inside the steel pipe with internal ribs, and a steel pipe with an inner rib that abuts on the outer surface of the steel pipe with internal ribs. Joint structure of steel pipe concrete columns and beams consisting of fixed beams