JPS5927040A - Reinforcing of iron skeltetal pillar leg part - 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 The present invention relates to a method for reinforcing a steel column base, and more particularly to improving a column base when a steel column is embedded in a reinforced concrete foundation or foundation beam.

By the way, the applicant has already proposed a method of erecting steel columns into holes previously made in the foundation and foundation beams (Tokugansho, tA-//,
IfgJA No.), and a device for resisting the bearing force applied to the base of the steel column and preventing localized concrete failure (Jitsugan Shosa Ku No. 9579/).

In addition to the above-mentioned purpose, this invention also provides shear reinforcing bars (hoops) for column main reinforcing bars around steel columns. , surround it with a material that resists bearing stress and a material that also has a shear reinforcement function, and after pouring concrete for the foundation or foundation beam,
A method of erecting a steel column in a space surrounded by the material and filling the space with concrete, mortar, etc.

This will be explained below according to the drawings.

FIG. 1 shows a preferred embodiment of the present invention, where / is a material that also serves as a reinforcement for resisting bearing stress and a shear reinforcing function, in which a perforated steel plate is used. The main reinforcing bars g1 scrap of the foundation or foundation beam 3 are arranged, the perforated steel plate l and the rebar g are installed, and the concrete filter of the foundation or foundation beam 3 is poured. After the concrete has hardened, a steel frame column Y is erected in the space surrounded by the perforated steel plate, and the space is filled with concrete or mortar 7 to complete the work.

Figure Ω shows a conventional example of a side column and a corner column of a steel-framed reinforced concrete structure or a steel-framed structure. , both yield strength and rigidity decrease,
Since there is an earthquake-resistant upper wall, the area is generally created by simply inserting inclined reinforcing bars 10, but the current situation is that this has not solved the problem.

FIG. 3 shows another embodiment of the present invention, which solves the problems in FIG. A reinforcing plate (for some examples) is attached in advance by welding to the side surface of the side slope, which also serves as a material that resists bearing stress and a shear reinforcement function, and is reinforced with reinforcing bars, etc.
J/, 2 was obtained from the above-mentioned Plateno/.

In addition, in this explanatory diagram, several reinforcing materials are provided on the plate/l in only one direction of the foundation beam 3, but
If necessary, it can be reinforced in multiple directions using the same method. Furthermore, this construction method is similar to that described in FIG.

In addition, the explanatory diagram shows a perforated steel plate, which also serves as a material that resists bearing stress and has a shear reinforcement function.
In addition, expanded metal, metal lath, etc. can be used.

As described in detail above, the present invention uses a material that resists bearing stress and a material that also has a shear reinforcement function, so it is possible to prevent the concrete of the foundation or foundation beam from breaking due to bearing stress, and the shear reinforcement It also plays the role of a hoop.

Furthermore, since steel columns can be erected at any time after the foundation or foundation beams are concreted, there are advantages such as being able to proceed with on-site work such as backfilling and external scaffolding, regardless of the timing of steel frame fabrication. It is something.

[Brief explanation of drawings]

Figures 1 and 3V show examples of the present invention; Figure 1 is a perspective view of the main parts taken out after concrete pouring, Figure 3 is a plan sectional view, and Figure 2 is a plan sectional view of the conventional construction method. . /...Materials that resist bearing stress and materials that also serve as shear reinforcement...Steel frame Column 3...Foundation or foundation beam...Returning reinforcing bar...Shear reinforcement (hoop) 6 ... Light concrete concrete ... Post-cast concrete ... Foundation beam main reinforcing bar 9 ... Stirrup lθ ... Inclined reinforcement / I ... Reinforcement strip mounting plate 12 ... Reinforcement material Patent applicant: Obayashi Co., Ltd. Agent: Susumu Arimori

Claims (1)

[Scope of Claims] (1) A leg of a steel column embedded in a reinforced concrete foundation or a foundation beam, which resists bearing stress by the leg and main column reinforcing bars placed around the leg. After surrounding the space with material and a material that also has a shear reinforcement function and pouring concrete for the foundation or foundation beam, a steel column is erected in the space surrounded by the material, and the space is filled with concrete, mortar, etc. A distinctive method of reinforcing the base of a steel column. (:l) Reinforcement of the steel frame column base according to claim 1, characterized in that the material that resists the bearing stress and the material that also has a shear reinforcing function are expanded metal, steel plate, metal lath, etc. Method. (3) A plate for utilizing reinforcing material is fixed to the side surface of the material that also serves as a side slope and shear reinforcing function for resisting the bearing stress, and further a reinforcing material is attached to the plate. Reinforcement method for steel column legs described in Sections 1 and 2 0