JP2958573B2 - Steel concrete columns - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a concrete column having a steel frame.

2. Description of the Related Art In the case of a pillar exposed to the outside, such as a piloti pillar, it is desirable to match the appearance of the pillar to the outer wall of a building or the like. For example, in the case of a building having concrete or a concrete-like outer wall, the entire appearance can be unified by using concrete for the piloti pillar.

Problems to be Solved by the Invention In the above, when a building is constructed by a wet construction method using cast-in-place concrete, columns can also be constructed from cast-in-place concrete. However, in the case of a steel structure in which a concrete plate or the like is attached to a steel frame, constructing only columns with cast-in-place concrete has the disadvantage of complicating work, and this column is made of precast concrete. However, there is a disadvantage that the structural calculation is complicated because the structure of the frame itself and the pillar portion are different. Further, such precast concrete has disadvantages such as extremely heavy weight, high transportation cost, difficulty in on-site work, and complicated connection with the steel frame of the building.

The present invention is to provide a structure of a steel concrete column in which such a conventional disadvantage is solved.

Means for Solving the Problems In order to solve the above problems, in the present invention, a steel pipe is coated with a concrete pipe, and the concrete pipe is placed on a bracket whose lower end face protrudes from the steel pillar. A bracket protruding from a steel column at the upper end without protruding outside the inner diameter of the concrete pipe, and a bolted joint at the upper end face of the concrete pipe to a screw hole at the upper end face of the concrete pipe. The plate and the plate are interconnected.

Further, in the above, a heat insulating material is interposed between the bracket and the end face of the concrete pipe, whereby an external heat insulating structure in which heat of concrete is not transmitted to the steel frame side can be obtained.

In the steel concrete column of the present invention, first, a concrete pipe is externally fitted from the upper end side of the steel column and placed on the lower bracket, and then the upper end face of the concrete pipe and the upper bracket are connected via the joining plate. By joining, the concrete pipe and the steel column are integrated, and then the concrete column is fixed to a frame such as a beam of a building by bolts.

EXAMPLES Hereinafter, examples in which the present invention is applied to a piloti pillar will be described. FIG. 3 shows the appearance of the mounted state of the piloti pillar. As shown in FIG. 3, in the piloty section 2 from which the ceiling section 1 projects, the floor section 3 of the piloti section 2 extends from the floor 3 to the ceiling section 1. The concrete column 4 of the present invention is attached. In the figure, reference numeral 5 denotes a foundation beam, and the lower end of the concrete column 4 is fixed to the foundation beam 5. On the other hand, reference numeral 6 denotes a beam arranged on the upper side of the ceiling 1, and the upper end of the concrete column 4 is fixed to the beam 6.

In FIG. 1, reference numeral 8 denotes a steel column made of a square steel tube. A small-diameter round steel tube 9 is fixed to the upper end of the steel column 8 in a protruding manner, and is horizontally welded to the upper end of the round steel tube 9 in advance. A joining plate 10 is fixed to the lower surface of the beam 6 with bolts 11. On the other hand, a small-diameter round steel pipe 12 is also protrudingly welded to the lower end of the steel pipe column 8, and a horizontal joint plate 13 previously welded to the lower end is similarly bolted onto the foundation beam 5. ing. In the drawings, 16, 16,... Indicate rib plates welded to the outer circumferences of the round steel pipes 9, 12.

Further, at the upper end of the steel pipe 8, inverted L-shaped brackets 18 and 18 are welded on its outer surface in advance at its vertical portion.
As shown in FIG. 2, bolt holes 19 are formed in advance. On the other hand, reference numeral 20 denotes a concrete pipe of the present invention. The concrete pipe 20 is loosely fitted to the steel pipe column 8 to cover the steel pipe column 8. As shown in FIG. 2, the upper ends of the concrete columns 20 are respectively provided with the brackets.
Two nuts 21 are respectively embedded and mounted in advance in correspondence with 18, 18. Reference numerals 22 and 22 denote two plate-like joining plates. The joining plate 22 has three bolt holes 23 corresponding to the bolt holes 19 of the bracket 18 and the nuts 21 on the end faces of the concrete pipes 20. These joining plates 22 are installed in such a manner as to straddle the brackets 18 and the end faces of the concrete pipes 20 corresponding to the respective brackets 18, and have one central bolt hole 23.
The bolt 25 inserted from above is further inserted into the bolt hole 19 of the bracket 18, and the nut 24 is screwed from below, and the joint plate 22 and the bracket 18 are fixed to each other by tightening. On the other hand, another bolt 25 is inserted into the remaining two bolt holes 23 of the joining plate 22 from above, and the bolt 25 is screwed into the embedded nut 21 so that the joining plate 22 and the concrete pipe 20 are fixed to each other. In this way, at the upper end of the concrete pipe 20, the bracket 18 and the concrete pipe 20 are indirectly connected via the connecting plate 22.
At this time, a heat insulating material 26 such as a rubber packing is interposed between the bracket 18 and the joining plate 22 so that heat of the concrete pipe 20 side is not transmitted to the square steel pipe 8 side. .

On the other hand, a pair of inverted L-shaped brackets 27, 27 are also welded to the lower end of the square steel pipe of the steel pipe column 8 on the outer surface thereof in advance. And its bracket
The bolt 28 inserted from below into the bolt hole of 27 is directly screwed into the embedded nut 29 previously embedded in the lower end surface of the concrete pipe 20 in advance as described above, and the bracket 27 and the concrete pipe 20 are integrated with each other. They are connected.

In addition, a sealing material 30 is filled between the concrete pipe 20 and the ceiling 1 of the piloty section 2 to close the space. On the other hand, the lower end of the concrete pipe 20 and the floor concrete 3
Between the concrete pipe 20 and the covering plate
32 is provided to cover the outer periphery of the steel column 8 thereunder, and a sealing material 31 is filled between the cover plate 29 and the end face of the concrete pipe 20.

Effect of the Invention As described above, according to the present invention, a concrete column is coated on a steel column, and the steel column is fixed to a framework of a building. The portions also have the same steel structure, which has the effect of facilitating structural calculations and the like. In addition, compared to the case where the end face of the concrete pipe is directly attached, the steel column is attached to the frame by protruding the end of the steel column, so that the attachment can be easily performed by bolts and the like, and the hollow shape can be obtained. Since the concrete pipe is used, the weight becomes lighter, the handling at the time of transportation and installation is easy, and a product excellent in workability is obtained. Furthermore, when integrating the concrete tube and the steel column, the concrete tube can be easily positioned simply by fitting it from the upper end of the steel column and inserting it until it hits the lower bracket. No need to provide. In addition, since the joining plate is fixed to the upper end side of the concrete pipe by using the screw holes provided in the upper end face, it is not necessary to provide a notch or the like which is apt to be chipped or broken in the concrete pipe. In addition, as shown in the second invention of this application, by interposing a heat insulating material between the bracket of the steel column and the end surface of the concrete tube, the heat of the concrete tube can be transmitted to the steel column side. In addition, there is an effect that a concrete pillar having a so-called outer heat insulating structure having a large heat insulating effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a concrete column according to an embodiment of the present invention in an attached state. FIG.
The figure is a schematic side view showing an example of a piloti pillar. 4 ... Piloti column, 8 ... Steel tube column, 18 ... Bracket,
20 ... concrete pipe, 22 ... joint plate, 26 ... thermal insulation, 27 ... bracket.

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) E04C 3/00-3/20 E04B 1/76 E04B 1/30 E04B 1/58

Claims (2)

(57) [Claims] The concrete pipe is covered with a steel frame, and the concrete pipe is fixed by being mounted on a bracket having a lower end face protruding from the steel column, and an inner diameter of the concrete pipe at an upper end. A bracket that protrudes from a steel column in a state that does not protrude more than the outer diameter direction, and a joining plate that is bolted to a screw hole on the concrete pipe upper end face at the concrete pipe upper end face, is characterized by being mutually connected. Steel concrete columns. 2. The steel concrete column according to claim 1, wherein a heat insulating material is interposed between the bracket and the end face of the concrete pipe.