JPS62170636A - Steel pipe reinforced concrete pillar - 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 (Industrial field of application) The present invention relates to steel pipe reinforced concrete columns that are applied to columns of suspended mole rails and other structures.

(Prior art) Thirdly, j indicates a suspended type mole rail sword tube support, and the 4'M tube support (α) is located between the upper and lower lines of the vehicle (61) and is located in the median strip of an ordinary road. Since it is planted, the outer diameter is 1.
0m - 15m1 Most of them are 12m - 18m in height from the ground.

Note that in the figure (, 1 is the running girder of the vehicle, +d) is the foundation of the support column. For this reason, low-cost reinforced concrete columns are insufficient in terms of strength, and in most cases designs are made with costly steel pipe columns.

This column bends considerably from side to side due to the load of the up and down line vehicles, and the influence of bending stress is extremely large, so we suppress the deflection.
In order to maintain strength, the wall thickness of the steel pipe has been increased, and in some cases the thickness of the pipe exceeds 50 meters.

Therefore, in order to completely reduce the wall thickness of the #4 pipe and increase the strength and rigidity of the steel pipe column, a steel pipe concrete column in which concrete is cast and filled inside the steel pipe has been proposed. Conventionally, as shown in Fig. 4, a stud (21) was planted on the inner peripheral surface of the steel pipe (1), and the steel pipe (1) was
Concrete IJ (31) installed inside the same steel pipe (1)
We are trying to integrate with the.

(Problems to be Solved by the Invention) However, there is a problem in that strength and rigidity are not sufficient if the steel pipe is simply fully loaded with concrete, as in the conventional steel pipe concrete column.

For this reason, it is conceivable to install all the shaft reinforcing bars (4) concentrically within the steel pipe (1) as shown in Fig. When pouring
There is a risk of disorder in the arrangement of the shaft reinforcing bars, and if a reinforcing bar cage made entirely of braided shaft reinforcing bars and auxiliary bars such as spiral bars is used,
There is a problem that the poured concrete IJ-t does not go around sufficiently.

(Means for Solving the Problems) The present invention was proposed to solve these problems, and includes reinforcing bars extending in the longitudinal direction of the steel pipes at predetermined intervals on the inner peripheral wall surface of the steel pipes. The present invention also relates to a steel pipe reinforced concrete column characterized in that the steel pipe is entirely filled with concrete.

(Function) As described above, in the present invention, reinforcing bars extending in the longitudinal direction of the steel pipe are fixed to the inner circumferential wall surface of the steel pipe at predetermined intervals along the circumference, and concrete is completely poured inside the steel pipe. The reinforcing bars welded to the inner circumferential wall of the steel pipe act as a strength member integrally with the steel pipe body, and are the same as the steel pipe. It is completely integrated with the concrete inside the pipe, increasing the strength of the column and the thickness of the A11i metal plate.

(Effects of the Invention) As described above, in the steel pipe reinforced concrete column according to the present invention, the strength and rigidity of the column are increased by the group of low-cost reinforcing bars attached to the inner peripheral wall surface of the steel pipe. The wall thickness is reduced and a pillar with less deflection is constructed at low cost.

Also, according to the present invention, the reinforcing bars @! 4.Since it is directly bath-bonded to the inner circumferential wall of the pipe, there is no disturbance in the arrangement of the reinforcing bars when concrete is completely poured inside the steel pipe, and the reinforcing bars welded to the circumferential wall of the steel pipe form a slip prevention mechanism. By doing so, the steel pipe and the concrete placed inside the steel pipe are integrated.

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

In Figures 1 and 2, dll is a steel pipe, and reinforcing bars a2 extending in the longitudinal direction of the steel pipe αυ are fixed at predetermined intervals on the inner peripheral wall surface of the pipe by welding, and concrete α3) is attached to the steel pipe α1). was poured and filled to form steel pipe reinforced concrete columns.

Note that deformed reinforcing bars are used as the reinforcing bars (12) to further increase adhesion to concrete.

Since the illustrated embodiment is configured as described above, the reinforcing bars Q2+, which are welded and protruded from the inner peripheral wall surface of the steel pipe (11), serve to prevent the steel pipe α]) from slipping between the concrete 03 and the concrete 03. , the steel pipe (Ill) and the concrete (131) are integrated to resist external forces, and the reinforcing steel (12+) also acts as a strength member, increasing the strength of the steel pipe reinforced concrete column, and the steel pipe θ1 ), the wall thickness of the column can be reduced, and the entire structure of the column member can be constructed at low cost and with reasonable structure.

Also, since the reinforcing bar (121 is fixed to the steel pipe 01), there is no need for concrete inside the same steel pipe (old). J-) Q3J is easy to place, does not disturb the arrangement of reinforcing bars, and works well around concrete (131).

In addition, if it is necessary to increase the amount of reinforcement for strength reasons, the above percentage
It may also be a double-reinforced steel pipe reinforced concrete column with axial reinforcing bars arranged concentrically within the pipe.

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 designs without departing from the spirit of the present invention. .

[Brief explanation of drawings]

Fig. 1 is a cross-sectional plan view showing one embodiment of the steel pipe reinforced concrete column according to the invention, Fig. 2 is an enlarged view of part ① in Fig. 1, Fig. 3 is a front view of a suspended type mole rail steel pipe column, and Fig. 4 5 and 5 each show a conventional support column, and are cross-sectional plan views taken along the line A--A in FIG. 3. (11)... Steel pipe, (12i... Rebar, (131...
・Concrete sub-agent Patent attorney Shige Okamoto 2 other people

Claims (1)

[Claims] A steel pipe reinforced concrete column, characterized in that reinforcing bars extending in the longitudinal direction of the steel pipe are welded to the inner circumferential wall surface of the steel pipe at predetermined intervals, and concrete is placed and filled inside the steel pipe.