JPH11166292A - Steel frame beam and floor execution using the beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a need for a stud bolt for the upper surface of an upper flange and a dowel bar for integral formation with an RC-made floor, in a steel frame beam, to arrange the upper flange in an RC-made floor slab, to calculate a floor part as a part of structural sectional performance of a floor part, and to save an amount of steel frames and a story height. SOLUTION: A plurality of through-holes 10 for floor bar arrangement are formed in spots situated closer to an upper flange 4 of a web 8 of a steel frame beam 2. Further, angles 12 on which floor forms 20 are placed in parallel to the upper flange 4 are arranged. The floor forms 20 are placed on the angles 12 on the two surfaces of the web 2 and concrete 30 is placed in the through- holes 10 to construct the floor slab 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel beam and a floor construction method using the steel beam.

[0002]

2. Description of the Related Art Steel beams and reinforced concrete (R)
C) Conventionally, in joining floorboards, a method has been adopted in which a stud bolt or a dowel bar is attached to the upper surface of an upper flange of a steel girder to construct an RC floor.

[0003]

However, such a conventional floor construction method has the following problems. (1) In order to integrate the RC floor with the steel girders, it is necessary to attach stud bolts and dovetails on the upper surface of the upper flange of the steel girders. This was a factor that raised costs. (2) Since the floor plate is constructed on the upper surface of the girder, the structural cross-sectional performance of the girder is calculated only for the steel frame part, the floor part cannot be calculated, it is uneconomical, and the floor height is wasted. Sometimes occurred.

[0004] The present invention has been devised in view of the above circumstances, and the present invention can contribute to cost reduction by eliminating the need for stud bolts or dowels on the upper surface of the upper flange for integration with the RC floor. It is another object of the present invention to provide a steel beam capable of disposing an upper flange in an RC floor plate. The present invention also provides a floor construction method using the above-mentioned steel beams, whereby the floor portion can be calculated as a part of the structural cross-sectional performance of the beam, and the amount of steel frame and the floor height can be reduced. The purpose is.

[0005]

In order to achieve the above object, the present invention relates to a steel beam having upper and lower flanges and a web for connecting the upper and lower flanges, wherein the web is provided with through holes for floor reinforcement. And a receiving member on which a floor form is placed at a position below the through hole on at least one surface of the web. Further, in the present invention, the plurality of through-holes,
It is characterized in that it is provided so as to be arranged in parallel with the upper flange at the web portion near the upper flange. Further, the present invention is characterized in that the receiving member is provided so as to extend parallel to the upper flange at a web portion near the upper flange. Further, the invention is characterized in that the receiving member is an angle material. Further, the present invention is characterized in that the receiving members are provided on both surfaces of the web, respectively. Further, the present invention provides a steel beam comprising upper and lower flanges and a web, wherein a plurality of through-holes for floor reinforcement are formed at a web portion near an upper flange, and an upper flange below the through-hole on at least one surface of the web. A receiving member on which a floor form is placed is provided at the deviated portion, the floor form is placed on the receiving member, and a floor plate is constructed by placing concrete through a reinforcing steel bar through the through hole.

According to the steel beam of the present invention and a floor construction method using the same, a floor form is placed on a web receiving material, and concrete is poured into the through hole of the web through a floor reinforcing bar, thereby forming an upper flange. Can be placed in the RC floorboard. As a result, the floor portion can be calculated as a part of the structural section of the beam, and the amount of steel frames and the floor height can be reduced.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A floor construction method according to the present invention will be described below.
A description will be given with reference to the drawings together with the steel beam according to the present invention. FIG. 1 is a perspective view in which a part of a steel beam is broken, and FIG. 2 is a longitudinal sectional view of an example of floor construction performed using a steel beam. The steel beam 2 is a large beam, and the steel beam 2 has an upper flange 4 and a lower flange 6.
And an I-beam (including an H-beam) comprising a web 8 connecting these upper and lower flanges 4 and 6. In the portion of the steel beam 2 above the web 8 along the side of the upper flange 4, a large number of through holes 10, 10, 10,... I have. Are formed at regular intervals (the pitch may change midway) over the entire length of the steel beam 2, and are located on the same straight line parallel to the upper flange 4. Are arranged as follows. Through hole 1 of web 8
Angles 12, 12 as receiving members for the floor form are attached to both sides along the lower side of 0, 10, 10,... By welding, respectively. Angle 1 on both sides
Reference numerals 2 and 12 are horizontally mounted over the entire length of the steel beam 2 and are parallel to the upper flange 4. If the floor thickness changes, a step is provided in the middle of the direction in which the angle 12 extends, and a step also occurs in the arrangement of the through holes 10 correspondingly.

When an RC floor is constructed using the above-mentioned steel beam 2, when the steel frame is completed, as shown in FIG. 2, a deck plate is placed on the angles 12, 12 on both sides of the web 8 of the steel beam 2. The edge portions of the floor forms 20, 20, which are made of wood or plywood, are placed in advance. Then, the lower reinforcing bar 24 used for the RC floor plate 22 is connected to the web 8 of the steel beam 2 as shown in the figure.
Respectively. Further, an upper reinforcing bar 26 is arranged above the upper reinforcing bar 26, and the upper reinforcing bar 26 and the lower reinforcing bar 24 are connected by reinforcing bars 28, 28. After such floor reinforcement, the concrete floor 30 is cast, thereby obtaining the RC floorboard 22 in which the upper flange 4 and the web 8 of the steel beam 2 are embedded in the concrete 30 as shown in the figure.

According to the present embodiment, since the lower reinforcing bar 24 for the floor penetrates the steel beam 2 which is a large beam, the RC floor plate 22 in which the upper flange 4 and the upper portion of the web 8 are buried can be constructed. Advantages are obtained. (1) No stud bolts or dowels are required on the upper surface of the upper flange 4 of the girders (steel beams 2). (2) Since the RC floor plate 22 can be calculated as the structural section performance of the girder (steel beam 2), the structural section performance of the girder (steel beam 2) can be improved, and the amount of steel frame and floor height can be reduced. (3) The upper flange 4 and the upper part of the web 8 are RC floor plates 22
The rigidity of the girders (steel beams 2), especially the rigidity in the horizontal direction, can be greatly improved. (4) The upper flange 4 and the upper part of the web 8 are RC floor plates 22
The area required for the fireproof coating of the girders (steel beams 2) can be reduced.

[0010] In the above embodiment, the steel beam is a large beam, but the present invention is not limited to this, and a small beam may be used. In the embodiment, the floor form receiving members are provided on both surfaces of the web of the steel beam. However, the receiving members may be provided only on one surface of the web.
Further, it goes without saying that other specific detailed structures and the like can be appropriately changed.

[0011]

As is clear from the above description, according to the steel beam of the present invention and the floor construction method using the same, a floor form is placed on a web receiving material, and a floor reinforcing bar is passed through a through hole of the web.
Concrete is poured. Therefore, the upper flange is RC
Since it can be placed in a slab and the floor can be calculated as part of the structural cross-sectional performance of the beam, it is possible to reduce the amount of steel frames and floor heights, and also to achieve cost reductions. In addition, it is not necessary to provide a stud bolt or a dowel bar on the upper surface of the upper flange of the steel beam, which can contribute to cost reduction.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a steel beam as an example to which the present invention is applied, which is partially cut away.

FIG. 2 is a longitudinal sectional view showing an example of floor construction performed using the steel beam of FIG.

[Explanation of symbols]

 2 Steel beam 4 Upper flange 6 Lower flange 8 Web 10 Through hole 12 Angle 20 Floor formwork 22 RC floorboard 24, 26, 28 Floor reinforcement 30 Concrete

Claims (6)

[Claims] 1. A steel beam having upper and lower flanges and a web connecting the upper and lower flanges, wherein a plurality of through-holes for floor reinforcement are formed in the web at intervals in an extending direction of the web. The steel beam according to claim 1, wherein a receiving member for mounting a floor form is provided at a position below the through hole on at least one surface of the web. 2. The steel beam according to claim 1, wherein the plurality of through holes are provided so as to be arranged in parallel with the upper flange at a web portion near the upper flange. 3. The steel beam according to claim 2, wherein the receiving member is provided so as to extend parallel to the upper flange at a web portion near the upper flange. 4. The steel beam according to claim 1, wherein the receiving member is an angle member. 5. The steel beam according to claim 1, wherein the receiving members are provided on both surfaces of the web, respectively. 6. A plurality of through-holes for floor reinforcement are formed at a web portion near an upper flange of a steel beam including upper and lower flanges and a web, and at least one surface of the web is closer to an upper flange below the through-hole. A floor is constructed by placing a receiving member on which a floor form is placed, placing the floor form on the receiving member, passing a floor reinforcing bar through the through-hole, and casting concrete. Construction method.