JPH0393950A - Joint structure for steel pipe type concrete column - Google Patents

Abstract

PURPOSE:To enhance the workability by joining a joint member to one end of a steel pipe, by making a side steel pipe abutting to the steel pipe, and by charging concrete into both steel pipes so as to bury the joint member in the concrete. CONSTITUTION:A joint member 3 is jointed by welding or the like to the inner periphery of one end part of one of steel pipes 1 to be connected together so that the joint member 3 is projected toward the other one of the steel pipes 1, bridging therebetween. Then, both pipes are made to abut to each other, and are temporarily fastened. Thereafter, concrete 2 is filled in the pipes so as to bury the joint member 3.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a joint structure for a steel pipe concrete column in which force is transmitted through concrete filled inside the steel pipe.

(Problem to be Solved by the Invention) Column joints in which steel pipes are filled with concrete are usually constructed by applying steel pipe joints. A plate is installed between the erection pieces that protrude from the outer periphery of both sides, and the plates are bolted together and temporarily fixed, and the force is transferred by welding a steel pipe, or by passing the plate and using a high-capacity bolt. It is being said.

However, with the former method, the connection of steel pipes relies on welding, which is affected by weather conditions, making construction workability difficult, resulting in delays in the construction period, and requiring quality inspections after construction is complete.

On the other hand, in the latter method, the number of bolts is large, so it takes a lot of work, and after tightening, it is necessary to close the hole temporarily made on the circumferential surface of the steel pipe for the tightening work by welding, which also reduces workability. There is a problem.

This invention was made based on the actual situation of this conventional method, and aims to propose a new joint structure with good workability.

(Means for Solving the Problems) In the present invention, the inside of the steel pipe is filled with concrete, and the joint member is fixed in this concrete to transmit force, or the joint metal fittings are attached to both or one of the steel pipes. Alternatively, joint plates can be joined together and joint hardware can be bolted to each other, or bolts can be joined to the joint plates through steel pipes to eliminate on-site welding work.
Aim to improve workability.

The joint member is joined to the inner periphery of one end of the steel pipe so as to protrude to the other side, and the steel pipe on the other side is butted against this steel pipe, and both steel pipes are simply filled with concrete, and the joint member is placed in the concrete. It is connected by burying it in the

The fitting hardware is joined to the inner periphery of the ends of both steel pipes so as to protrude to the other side, and the two steel pipes are connected by placing the joining fittings across the two fitting fittings and joining them to connect the fitting fittings. be done.

The joint plate protrudes from the inner periphery of the end of one steel pipe toward the other side, and is joined at a position inscribed in the steel pipe on the other side, and is connected to the joint plate by passing through the side surface of the steel pipe on the other side and joining a bolt. Steel pipes are connected.

(Example) The present invention will be explained below based on the drawings showing one embodiment.

In the present invention, a steel pipe 1.1 constituting a column is filled with concrete 2 and connected to the steel pipe 1.1.

First, the invention described in claim 1 will be explained.

This invention has a structure in which a plurality of joint members 3 are buried in concrete 2 filled in a steel pipe 1.1, and force is transmitted using the fixation thereof.

As shown in the figure, the joint member 3 has a length spanning both steel pipes 1, 1, and is joined to the end of one steel pipe 1 by welding or the like in advance so as to protrude toward the other side by going around the inner circumference of the steel pipe 1. ing.

In this invention, the force is transmitted between the steel pipes 1.1 by embedding the joint member 3 in the concrete 2, so the protruding side has a shape that is fixed in the concrete 2, such as a hook shape. has been done.

Erection beads 4, 4 are joined to the outer periphery of the steel pipe 1.1 to temporarily connect them.

Both steel pipes 1, 1 are butted against each other as shown,
A plate 5 is placed across the erection pieces 4, 4, and in a temporarily fixed state, the inside is filled with concrete 2, and the joint member 3 is fixed to connect them.

The erection bead 4 is cut off after the steel pipe 1.1 is connected.

In order to prevent the concrete 2 from flowing out during filling, a sealing material 6 that will become the formwork is glued between the ends of the steel pipes 1 and 1, as shown in Figure 2-■, or an annular ring is attached as shown in ■. Plate 7 is joined.

In the embodiment, a case is shown in which a reinforcing bar is used as the joint member 3.

Figure 1 shows a case where a hook is formed on the protruding side, and Figure 3 shows a case where it is assembled into a reinforcing cage shape. In the case of FIG. 3, the joint member 3 is installed by being placed on a receiving metal fitting 8 protruding from the inner circumference of the steel pipe 1.

Next, the invention described in the second claim will be explained.

As shown in FIG. 4, this invention has two steel pipes 1. The steel pipe 1.1 is connected by connecting fittings 9, 9 joined to the ends of the steel pipe 1.1 with a joining plate I-10.

Like the joint member 3, the joint hardware 9 has a length spanning both steel pipes 1.1, and as shown in (■), it is protruded from the inner peripheral surface of the steel pipe 1 in the same manner as the erection piece 4, and extends from each end to the other side. stand out.

Both steel pipes 1.1 have this fitting fitting 9 between their ends as shown in the figure.
are butted together at a distance equal to the protruding length of.

A joint plate 10 is installed between the joint fittings 9.9 that protrude from each steel pipe 1.1 and are opposed to each other, and are joined thereto with bolts 11, and the steel pipes 1.1 are connected by the connection of the joint fittings 9,9. Ru.

Furthermore, a thin plate 12 serving as a formwork is wrapped around both steel pipes 1, 1, and concrete 2 is filled inside the steel pipe 1.

After the concrete 2 has hardened, the thin plate 12 is removed.

In this invention, the erection piece 4 is not necessary because the steel pipe 1.1 is temporarily connected by the joint hardware 9,9.

Next, the invention recited in claim 3 will be explained.

In this invention, as shown in FIG. 5, steel pipes 1.1 are connected by joining bolts 11 to a joint plate 13 joined to the inner periphery of one steel pipe 1.

The joint plate 13 also has a length spanning both steel pipes 1, 1, and is joined so as to be inscribed in the other steel pipe 1 when they are connected.

This joint plate 13 has a port 1 on the other steel pipe 1 side.
It has a female thread that the l is screwed into.

Further, the bolt holes 1a of the steel pipe 1 on the other side are made to be oversized as shown in (2) in order to deal with adjustments and construction errors during erection.

As shown in the figure, the steel pipe 1 on the other side is butted against each other so as to be inserted around the joint plate 13, and is connected to the one steel pipe 1 by screwing a bolt 1l from the outside thereof. Furthermore, concrete 2 is filled inside.

Also in this invention, the erection piece 4 is not required.

(Effects of the Invention) The present invention is as described above, by embedding a joint member joined to one steel pipe in concrete filled inside, or by embedding a joint member joined to one or both steel pipes in advance. Since both steel pipes are connected by connecting hardware and joint plates with bolts, there is no need for any on-site welding work, improving workability.

[Brief explanation of drawings]

FIGS. 1-1 and n are a vertical cross-sectional view and a plan view, respectively, showing an embodiment of the invention according to the first claim, and FIG. 2-1. ■ is a partial sectional view showing the joint part, FIG. 3 is a vertical sectional view showing another embodiment,
Figure 4 I, n. III is a vertical sectional view, an elevation view, a plan view, and FIG. 5-1, n. m is a vertical sectional view and an elevational view, respectively, showing an embodiment of the third claimed invention. FIG. 1... Steel pipe, 1a... Bolt hole, 2.
...Concrete, 3...Joint member, 4
...Erection piece, 5...Plate, 6...Sealing material, 7...Ring plate, 8...Receiving hardware, 9. ...Joint hardware, 10...Joining plate, 11...
...Bolt, 12... Thin plate, 13...
fitting plate. I 11 Fig. 4-302-2 E Fig. 5

Claims (3)

[Claims] (1) A joint member that protrudes to the other side and has a length spanning both steel pipes is joined to the inner periphery of one end of the steel pipes that are connected to each other and forms a column, and the steel pipe on the other side is connected to this steel pipe. A steel pipe concrete column joint structure in which both steel pipes are butted together, the insides of both steel pipes are filled with concrete, and the joint members are buried in the concrete to connect both steel pipes. (2) Joint fittings that protrude to the other side are joined to the inner periphery of both ends of the steel pipes that are connected to each other and make up the column, and the two steel pipes are butted against each other at a distance, and the fittings are placed between the respective fitting fittings. A steel pipe concrete column joint structure in which a joining hardware is installed across the pipes and joined to this, and concrete is filled inside both steel pipes. (3) A joint plate that protrudes toward the other side and has a length spanning both steel pipes is connected to the inner periphery of one end of the steel pipes that are connected to each other and forms a column, at a position that is inscribed in the steel pipe on the other side. This steel pipe concrete column joint structure is made by butting this steel pipe against the steel pipe on the other side, connecting bolts to the joint plate through the side of the steel pipe on the other side, and filling the inside of both steel pipes with concrete.