JPH09256382A - Steel framed column embedding sill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To greatly improve strength while simplifying installation work of a sill for the improvement of the steel framed column sill in a steel framed construction. SOLUTION: Lower seat plates 13 installed to a concrete footing are monolithically provided to the lower ends of posts 11 arranged in a square and, at the same time, upper seat plates 19 for receiving flanges in the lower ends of steel framed columns are monolithically provided to the upper ends of the posts 11. A plurality of reinforcing bars 14 are hung down along the outsides of the posts 11 at specific intervals in the circumferential direction from the upper seat plates 19, and male screws 26 passing through the upper seat plates 19 and fastening the flanges in the lower ends of the steel framed columns rising from the upper surfaces of the upper seat plates 19 are monolithically provided to the upper ends of the reinforcing bars 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embedded foundation for a steel column in a building using the steel column.

[0002]

2. Description of the Related Art In a conventional steel structure, a steel-framed base is constructed by embedding the entire structure in concrete under a GL.
A method of erecting a steel column on this base is adopted.

[0003] As shown in FIG. 1, the base is integrally provided with a seat plate 3 installed on a concrete foundation 2 at the lower ends of four columns 1 arranged in a square, and further along the outside of each column 1. Then, four bolts 4 are raised, and the upper ends of the bolts 4 are projected from the upper surface of the concrete 5 in which the base is embedded, and the flanges 7 at the lower ends of the steel columns 6 are fastened using the bolts 4. It has a configuration to receive on top.

Further, in order to ensure the uprightness of the steel column 6, a horizontal leveling concrete 9 is hit on the upper surface of the embedded concrete 5 and the flange 7 of the steel column 6 is supported on the upper surface of the leveling concrete 9. Has been adopted.

[0005]

As described above, in the above-mentioned conventional example, after the base is buried in the concrete 5, the work of leveling and leveling the upper surface of the buried concrete 5 is indispensable. However, this operation is complicated and has a problem that a level defect is caused due to a skill difference. Further, the structure is such that the entire steel column 6 is substantially supported on the upper surface of the buried concrete 5, and there is an inherent problem of lack of strength. In addition, there is a risk that the level mortar is damaged by the impact when the column is erected and the column mortar falls.

A bolt 4 buried in concrete 5 and intended to function as a reinforcing bar, and an assembly forming a base body of four columns 1 and a seat plate 3 installed on a concrete foundation 2 are simply bolts. Since the bolts 4 are only temporarily fixed by the steady rests 8 for maintaining the verticality of the bolts 4, the two are structurally substantially separated, and it is difficult to maintain the verticality of the bolts 4.

[0007]

SUMMARY OF THE INVENTION The present invention provides an embedded base for a steel column which solves the above-mentioned problems. This embedding base is composed of a rectangular column, a lower seat plate for installation on a concrete foundation arranged at the lower end of the column, and an upper seat plate for receiving a flange at the lower end of a steel column arranged at the upper end of the column. The base body is integrally formed.

A plurality of reinforcing bars are suspended along the outside of each of the columns at intervals from the upper seat plate in the circumferential direction, and the upper ends of the reinforcing bars are penetrated through the upper seat plate to form the seat plate. It was raised from the upper surface, and the raised portion formed a male screw for fastening the flange at the lower end of the steel column.

According to this embedded base structure, the steel frame pillar of the building is stably and highly strongly loaded by the embedded base body composed of the columns and the upper and lower seat plates and the concrete in which the embedded base body is embedded. It is possible. In addition, the base assembly can be easily erected by installing the lower seat plate on a concrete foundation and fastening the steel column to the upper surface of the upper seat plate using male screws.

The structure in which the reinforcing bars hang down from the upper seat plate can effectively prevent inclination of the reinforcing bars and the like. In addition, the reinforcing bars and the base body can be easily integrated into a single body. Combined strength with buried concrete can be expected.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

The four columns 11 are arranged in a rectangular shape, and the columns 1 are
1 is provided integrally with a rectangular lower seat plate 13 for installation on the concrete foundation 12, and a rectangular upper seat plate 19 for receiving the flange 17 at the lower end of the steel column 16 is integrally provided at the upper end of the column 11. The three members 11, 13, and 19 form a rectangular parallelepiped base body.

The four pillars 11 are vertical and parallel, and the upper and lower seat plates 19 and 13 are horizontal and parallel, respectively.
1, 13, and 19 are integrally assembled by welding to form the rectangular parallelepiped base body.

The base body has a concrete filling space 20 formed inside the four pillars 11, and the concrete filling space 20 is formed between four openings 11 on four sides between the pillars 11.
Opened by one.

An upper opening window 22 is formed at the center of the upper seat plate 19 so as to communicate with the concrete filling space 20, and a lower opening window 23 is also formed at the center of the lower seat plate 13. Embedded concrete 15 and concrete foundation 12 filled in concrete filling space 20
To enable binding.

The embedded concrete 15 is cast around the base body and is filled into the concrete filling space 20 through the side opening window 21.
2 is filled so as to fill the inside of the upper seat plate 19 and reach a level substantially coincident with the upper surface of the upper seat plate 19.

Accordingly, the concrete poured around the base body flows into the space 20 through the opening window 21 and fills the space 20 so as to be integrated, and the whole base body is buried in the concrete 15.

The upper and lower seats 19 and 13 and the support 11 are made of metal such as iron, and the support 11 is formed of a hook-shaped angle member having a cross section viewed from the cross section.
It stands up so as to match the corners of 2, 23.

The same type of metal reinforcing bone 24 is connected by welding or the like between the lower end and the upper end of each of the columns 11, or
The middle part of the extending portion is connected by welding or the like with a reinforcing bone 25 to supplement the rigidity.

The upper and lower reinforcing bones 24 and the intermediate reinforcing bone 25 are plate members, and the upper and lower reinforcing bones 24 are welded so as to surround the opening edges of the upper and lower seating plates 19 and 13, and the upper and lower ends of the support column 11 are respectively attached thereto. Weld.

The upper seat plate 19 and the lower seat plate 13 project around the four pillars 11, and a mounting hole 34 is provided at the projecting portion of the lower seat plate 13. Lower seat plate 13 laid on top of
With an anchor bolt or the like.

A plurality of reinforcing bars 14 are suspended along the outside of the column 11 at intervals from the overhanging portion of the upper seat plate 19 in the circumferential direction. An upper seat plate 19 is attached to the upper end of the reinforcing bar 14.
Is formed to form a male screw 26 that rises from the upper surface of the seat plate 19, and a nut 27 is screwed onto the male screw 26.

The reinforcing bar 14 forms a vertical state by its own weight, but it can be temporarily fixed to the column 11 by a steady rest 18 in order to ensure this vertical state. In this way, the reinforcing bars 14 are suspended substantially in parallel with the columns 11.

The reinforcing bar 14 is preferably a reinforcing bar having a hump 28 formed on the circumferential surface thereof at an interval in the axial direction, and the outer circumferential surface at the upper end of the reinforcing bar is cut to form the male screw 26.
To form

An anchor portion 29 for strengthening the connection with concrete is provided at the extending portion of the reinforcing bar 14, for example, the lower end. For example, a male screw portion 30 is formed at the lower end of the reinforcing bar 14, a flange 32 is inserted into the male screw portion 30, and tightened by a nut 31, and the flange 32 is used as an anchor portion 29.

Then, the base assembly is stacked on the upper surface of the concrete foundation 12 with the lower base plate 13 to mount the base body, and the base is provided through the mounting hole 34 provided in the projecting portion of the base plate 13. The foundation is erected on the foundation 12 by setting anchors in the base 12.

Next, concrete 15 is poured around the base, and the concrete 15 is filled into the concrete filling space 20 through the side opening window 21. This makes G
L, the base body and the reinforcing bars 14 are embedded in the embedded concrete 15, and the upper seat plate 19 and the male screw 26 are provided.
A state in which is exposed on the upper surface of the embedded concrete 15 is formed.

A flange 17 provided at the lower end of the steel column 16 is placed on the upper seat plate 19 of the embedding base, and received. The male screw 26 is inserted into a mounting hole 33 provided in the flange 17 and screwed into the male screw. The flange 17 is fastened to the upper seat plate 19 with the nut 27.

[0029]

As described above, the steel column is stably received on the base, and the base and the embedded concrete complement each other, so that the load receiving strength of the steel column can be sufficiently secured.

The above-mentioned base can be merely provided on a concrete foundation with a lower seat plate, and the upper seat plate can be used as a load receiving means for a steel column. And the construction can be simplified.

In addition, the reinforcement and the base body can be integrated, and the reinforcement purpose by the reinforcement can be effectively achieved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a conventional embedded base for a steel column.

FIG. 2 is a perspective view showing an embedding base showing the embodiment of the present invention.

FIG. 3 is a sectional view of the embedded base.

FIG. 4 is a plan view of the embedded base.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Prop 12 Concrete foundation 13 Lower seat 14 Reinforcement 15 Embedded concrete 19 Upper seat 26 Male screw

Claims (5)

[Claims] A lower seat plate for installation on a concrete foundation is integrally provided at a lower end of a pillar arranged in a square shape,
An upper seat plate for receiving the flange of the lower end of the steel frame is integrally provided at the upper end of the strut, and a plurality of reinforcing bars are hung along the outer side of each strut at intervals from the upper seat plate in the circumferential direction,
An embedded base for a steel column, characterized in that a male screw is integrally provided at the upper end of the reinforcing bar for fastening the flange at the lower end of the steel column that penetrates the upper seat plate and rises from the upper surface of the upper seat plate. 2. The reinforcing bar according to claim 1, wherein said reinforcing bar has an anchor portion which is connected to concrete at an extending portion thereof.
Embedded foundation for the stated steel column. 3. The embedding base for a steel column according to claim 1, wherein said upper seat plate has an upper opening window at a central portion. 4. The embedding base for a steel column according to claim 1, wherein said lower seat plate has a lower opening window at a central portion. 5. The reinforcing bar according to claim 1, wherein the reinforcing bar is formed by a knotted reinforcing bar having a bump on its peripheral surface, and the male screw is formed by cutting a peripheral surface at an upper end of the reinforcing bar. Embedded foundation for steel columns.