JPH0660517B2 - Reinforcement device for steel pipe concrete composite columns - Google Patents

Description

TECHNICAL FIELD The present invention relates to a steel pipe-concrete composite reinforcing device.

[Prior art and its problems]

Recently, steel pipes having both compressive strength and bending strength, which are larger than those of other shaped steels, such as H-shaped steel, have been widely used as steel columns.

By the way, it is generally known that in a column member, a joint portion (panel zone) of a beam member generally receives a larger bending force and shearing force than other portions.

For this reason, the steel pipe column is reinforced by making the thickness of this portion thicker than the other portions, or by providing a diaphragm or rubbing.

For concrete-filled steel pipe columns, use striped steel pipes or striped steel pipes with stripes or protrusions on the inside, or project steel strips inside the steel pipe in the longitudinal direction and weld them. We are trying to integrate steel pipe and concrete.

However, striped steel pipes and steel pipes with protrusions are more expensive than ordinary steel pipes, and thus have a drawback that the manufacturing cost increases. In addition, to weld a stud bolt to the inside of a steel pipe, generally, a stud bolt is welded to a grooved steel or steel plate in advance, and this is formed into a steel pipe with a circular or square cross section. Similar to the above, there is a drawback that the manufacturing cost is high because it is more expensive than general steel pipes.

[Object of the Invention]

The present invention has been proposed in order to solve the above-mentioned conventional problems, and by using a stud bolt in a beam-joint portion or the like of a steel pipe-concrete composite column, it is possible to reinforce very easily and firmly. An object of the present invention is to provide a reinforcing device for a steel tube-concrete composite column.

[Structure of Invention]

The present invention, a plurality of strip steel projecting a plurality of stud bolts on the surface, inside or outside the beam member joint of the steel pipe column, the stud bolt in the steel pipe column around the circumference of the steel pipe column The above object is achieved by projecting and welding at predetermined intervals in the vertical and vertical directions, and filling the steel pipe pillar with concrete over its entire length.

〔Example〕

The present invention will be described below with reference to one embodiment shown in the drawings. A plurality of strip steels 2 and 2 are welded to a beam material joint portion of a steel pipe column 1 having a circular or square cross section, and a plurality of strip steels 2 and 2 are welded to the strip steels 2 and 2. The stud bolts 3, 3 of the book are welded by projecting them to the inside of the steel pipe column 1 (see FIGS. 1 to 3, 6 and 7).

Further, the steel pipe pillar 1 is filled with concrete 4 over its entire length.

The steel strip 2 has a predetermined length, and a plurality of stud bolts 3, 3 are welded to one side of the steel strip 2 in the longitudinal direction of the steel strip 1 at predetermined intervals.

Further, the strip steel 2 is welded to the inside of the beam-joined portion of the steel pipe pillar 1 along the vertical direction of the steel pipe pillar 1 in a longitudinal direction and at predetermined intervals in the circumferential direction of the steel pipe pillar 1. Alternatively, the steel plate columns 1 are spirally welded along the vertical direction (see FIG. 5).

As another method of attaching the steel strip 2, small holes 8 are provided at predetermined intervals along the vertical direction of the steel pipe pillar 1 in the beam-joint portion of the steel pipe pillar 1, and the steel strip 2 is welded to the front side of the steel pipe pillar 1. At the same time, the stud bolts 3, 3 may be projected into the steel pipe column 1 through the small holes 8, 8 (see FIGS. 8 to 10).

When the concrete 4 is filled in the factory, it is compacted and densely packed by using centrifugal force. In addition, the inner diaphragms 6 and 6 having a large hole 5 in the center are welded to the inside and outside of the beam member corresponding to the upper and lower flanges of the beam member, and the concrete 4 between the upper and lower diaphragms 6 and 6 is welded. The thickness can be freely changed within the range of the width of the inner diaphragm 6. Therefore, the concrete thickness can be changed between the upper and lower flanges and other portions.

Further, the front side of the beam member joint portion of the steel pipe column 1 is welded in correspondence with the upper and lower flanges of the beam member to which the outer diaphragms 7 and 7 are joined, and the outer diaphragms 7 and 7 are used as brackets for joining the beam members. It is possible to do.

It should be noted that the concrete 4 may be filled only in the beam-joint portion of the steel pipe column 1.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

Weld a plurality of stud bolts to a band steel of a specified length,
Since this steel strip is attached to the beam member joint of the steel pipe column by welding the stud bolts protruding into the steel pipe, the stud bolts can be attached accurately and securely at a predetermined position, and the steel bolt is relatively thin. A stud bolt can be attached to a steel pipe having a large diameter very easily.

For steel strips with stud bolts protruding from the surface, project the stud bolts into the steel pipe inside or outside the beam member joint of the steel pipe column at predetermined intervals in the circumferential direction and in the vertical direction. Since it is attached by welding and the concrete is filled in the steel pipe column over its entire length, the steel pipe column and the concrete at the beam member joint can be completely integrated even though it is a stud bolt method. There is an effect that the steel pipe column can be reinforced easily and strongly.

[Brief description of drawings]

1 to 3, FIG. 6 and FIG. 7 show an embodiment of the present invention, and FIG. 1, FIG. 2 and FIG. 7 are transverse sectional views of a steel pipe concrete column, and FIG. FIGS. 6 and 6 are partial longitudinal sectional views, FIGS. 4 and 5 are perspective views of steel strips with stud bolts, and FIGS. 8 to 10 show another embodiment of the present invention. 8 and 9 are cross-sectional views of a beam-joint portion of a steel pipe concrete column, and FIG. 10 is a vertical cross-sectional view thereof. 1 ... Steel tube column, 2 ... Strip steel, 3 ... Stud bolt, 4
…… Concrete, 5 …… Large hole, 6 …… Inner diaphragm, 7 …… Outer diaphragm, 8 …… Small hole.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Fukasawa 3-4-5 Toyosu, Koto-ku, Tokyo Stock company, Tomoe Corp. Toyosu factory (72) Inventor Norihiro Sato 3-chome, Toyosu, Koto-ku, Tokyo No. 4-5 Incorporated Tomoe Group Steel Works Toyosu Plant (72) Inventor Isao Kuboji 3-4-5 Toyosu, Koto-ku, Tokyo Incorporated Tomoe Kubo Works Toyosu Plant (72) Inventor Yamada Take 3-4-5 Toyosu, Koto-ku, Tokyo Stock Company, Tomoe Group Steel Works Toyosu Factory (56) References: Open 57-114834 (JP, U) Open 59-60219 (JP, U) Actual public Sho 59-10246 (JP, Y2)

Claims (1)

[Claims] 1. A steel strip having a plurality of stud bolts projecting from the surface thereof, inside or outside of a beam-joint portion of a steel pipe column, the stud bolts inside the steel pipe column, and in a circumferential direction of the steel pipe column. Weld it by projecting it at predetermined intervals in the vertical direction and welding.
A reinforcing device for a steel-tube-concrete composite column, characterized in that the steel-pipe column is filled with concrete over its entire length.