JP3064294U - Existing steel column with seismic and corrosion protection reinforcement structure and its RC foundation - Google Patents

Abstract

(57) [Summary] (Modifications required) [Problem] After rainfall, the acidic solution condensed and condensed by the sun rays stays near the base of the existing steel column, and there is a reality of corrosion deterioration. The main weakness is to take measures to strengthen the existing steel plate columns by adopting the seismic and corrosion protection reinforcement structure implemented by the present invention. SOLUTION: The chemical resistance and adhesiveness of the vinyl ester resin 3 and the toughness of the grit steel 4 around the existing steel plate column A deteriorated by corrosion, the grit concrete containing these two materials as the grit concrete, together with the reinforcing steel plate 5 and the existing steel plate Prop A and 3
By integrating the members, it is possible to prevent the deterioration of the structural strength due to corrosion deterioration, which is the weak point of the existing steel column, to provide a seismic and anti-corrosion structure, and to provide an economically inexpensive and tough reinforcing structure.

Description

[Detailed description of the invention]

[0001]

[Field to which the invention belongs]

 The present invention relates to a seismic retrofit structure of an existing steel column. In particular, the base of the existing steel plate post is corroded and degraded by acid rain, dog urination, and chemical changes caused by pigeon droppings, and is a weak point in the earthquake-resistant structure. Grit concrete is placed in the gap between the existing steel plate post and the reinforcing steel plate. This is a heavy-duty anticorrosion reinforced structure that focuses on the chemical resistance and adhesiveness of the resin when filled.

[0002]

[Prior art]

 Conventionally, after reinforcing steel plates are wrapped around the existing steel column, only the pressure welding of the butt joints causes crevice corrosion at a later date, causing further deterioration of the existing steel columns and causing a weak point in earthquake resistance. There is a weak point in toughness even if the integrated structure is formed by resin injection after roll-welding, and the literature is the Concrete Journal published by the Japan Concrete Institute.

[0003]

[Problems to be solved by the invention]

 The conventional reinforced steel roll-up, which is a conventional technique, raises the problem of crevice corrosion and weak toughness, and is likely to be a weak point in the earthquake-resistant structure. The structure of the present invention allows the existing steel-made pillars to deteriorate due to corrosion and weak toughness. Solving the above problem

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention focuses on the chemical resistance and adhesiveness of vinyl ester resin and the toughness of grit steel in order to prevent corrosion deterioration of existing steel plate columns and impart toughness. In addition, grit concrete containing both materials is used to fill and harden the gap between the existing steel plate support and the reinforcing steel plate, and they are integrated to form a seismic anticorrosion reinforced structure.

[0005] The existing RC foundation surface is raised and hardened with grit concrete, so that the existing steel column, the existing RC foundation and the grit concrete are integrated into a foundation having an earthquake-resistant and corrosion-proof reinforcement structure.

[0006]

[Embodiment]

 The embodiment of the existing steel plate support having the seismic and corrosion protection reinforcement structure and the RC foundation of the present invention is a grit concrete made of a mixture of vinyl ester resin and grit steel, which is adhered to the existing RC surface in a bulky manner, and furthermore, is made of an existing steel plate. The gap between the column and the reinforcing steel plate is filled and hardened with grid concrete to provide an earthquake-resistant and corrosion-proof reinforcing structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig. 1 shows the existing steel column (A), but the existing RC foundation (B) is suspended below the ground surface (C) as shown in Fig. 2 to the base of the existing steel column (A).

[0008] Further, the hanging surface (1) was drilled, an anchor bolt (2) was erected, and fixed with vinyl ester resin (3). The procedure is as shown in FIG.

Following FIG. 2, as shown in FIG. 3, a grit concrete (4) in which vinyl ester resin (3) and grit steel obtained by pulverizing steel are mixed up to the upper part of the existing steel plate column (A) flange (D). Then, after reinforcing steel plates are installed along the circumference of the existing steel column (A), the butted parts are pressed together.

After the installation of the reinforcing steel plate (5) is completed, the gap between the existing steel plate support (A) and the reinforcing steel plate is filled with grit concrete (4) as shown in FIG. The grit concrete (4) is again adhesively hardened to the upper portion of the anchor bolt (2) on the grit concrete (4) hardened with the above adhesive, and the existing steel plate column (A), the grit concrete (4), the reinforcing steel plate ( By integrating the three members in 5), the existing steel column (A) with the seismic and corrosion protection reinforcement structure is obtained.

[0010]

[Effect of the invention]

 As is evident from the results of the above-mentioned implementation, according to the present invention, an extremely large number of existing steel plate columns were made unstable by the use of the reinforcing structure of the present invention. It is possible to revive the existing steel plate support at low cost.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an existing steel column having an earthquake-resistant and corrosion-proof reinforcement structure of the present invention and its RC foundation before being implemented.

FIG. 2 is a cross-sectional view of an existing steel plate column having an earthquake-resistant and corrosion-proof reinforcement structure of the present invention and the RC foundation thereof.

FIG. 3 is a cross-sectional view of an existing steel plate column having an earthquake-resistant and corrosion-proof reinforcement structure of the present invention and the RC foundation thereof.

FIG. 4 is a cross-sectional view of an existing steel column having the earthquake-resistant and corrosion-proof reinforcement structure of the present invention and its RC foundation after being implemented.

[Explanation of symbols]

 A Existing steel plate support B Existing RC foundation C Ground surface D flange 1 Hanging surface 2 Vinyl ester resin 3 Grit concrete 4 Reinforced steel plate

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[Procedure amendment]

[Submission date] June 17, 1999 (1999.6.1
7)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

Claims (3)

[Utility model registration claims] An existing RC foundation is stripped from the ground to the base of an existing steel plate support below the ground surface, and the existing RC foundation after the stripping is stripped.
After drilling holes on the foundation surface, anchor bolts are built in, glued and fixed with vinyl ester resin, and furthermore, grit concrete crushed with steel and grit concrete containing vinyl ester resin are bonded and hardened in bulk, and grit concrete reinforced with each other is integrated. Existing steel plate support with seismic and anticorrosion reinforcement structure with basic structures. Further, a reinforcing steel plate is rolled up and installed along the periphery of the existing steel plate post, and the gap between the existing steel plate post and the reinforcement steel plate is filled with grit concrete after the butting portion is pressed. Pre-existing steel plate columns with seismic and anti-corrosion reinforcement structure. 3. The grit concrete, which has been raised and hardened on the existing RC foundation, is again raised with grit concrete, and after the hardening is completed, the three members of the existing RC foundation, grit concrete, and reinforcing steel plate are integrally reinforced. An existing steel column with a seismic and anti-corrosion reinforcement structure characterized by the adhesive strength, chemical resistance of vinyl ester resin and the toughness of steel.