JP2009138478A - Rc column reinforcing method - Google Patents

Rc column reinforcing method Download PDF

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Publication number
JP2009138478A
JP2009138478A JP2007317843A JP2007317843A JP2009138478A JP 2009138478 A JP2009138478 A JP 2009138478A JP 2007317843 A JP2007317843 A JP 2007317843A JP 2007317843 A JP2007317843 A JP 2007317843A JP 2009138478 A JP2009138478 A JP 2009138478A
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Japan
Prior art keywords
corner
panel
column
reinforcing
members
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Pending
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JP2007317843A
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Japanese (ja)
Inventor
Shinichi Omaki
慎一 大巻
Original Assignee
Daichi Koei Kk
ダイチ工営株式会社
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Application filed by Daichi Koei Kk, ダイチ工営株式会社 filed Critical Daichi Koei Kk
Priority to JP2007317843A priority Critical patent/JP2009138478A/en
Publication of JP2009138478A publication Critical patent/JP2009138478A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing method for easily reinforcing an existing RC (reinforced concrete) column. <P>SOLUTION: The reinforcing method comprises steps of covering the periphery of the RC column with a panel structure 10 having a cross section slightly larger than the cross section of the RC column, and filling a shrinkage-compensating mortar in a clearance between the RC column and the panel structure. The panel structure has four corner members 12 and four plate members 14 connecting the adjacent corner members. The corner member is formed by providing the inner surface of each side of an equilateral angle steel with a recessed part or a projecting part, and the plate member is formed by providing the outer surface of a steel plate of predetermined thickness with a projecting part or a recessed part coinciding with the recessed part or projecting part of the corner member. The projecting part or recessed part of the plate member is placed to coincide with the recessed part or projecting part of the corner member and fixed to each other by a fastening member 16 to assemble the panel structure. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for reinforcing an existing reinforced concrete column (hereinafter referred to as “RC column”).

  After the RC structure is constructed, it may be necessary to reinforce existing structural members for various reasons (for example, improvement in shear strength or plastic deformation capacity, revision of earthquake resistance standards, etc.). As a conventional representative reinforcing method, a method of surrounding the outer periphery of the RC column with a plurality of steel plates and fixing the steel plates by field welding is known.

  However, when the steel plates surrounding the existing RC columns are welded in the field, they must be welded sideways, and there is a problem that it is not easy to ensure good welding strength. Moreover, when reinforcing the RC pillar located in water, underwater welding must be performed, and there is a problem that it is difficult to ensure welding strength. Thus, there is currently no satisfactory method for easily and easily reinforcing existing RC columns.

  The present invention has been developed in view of such a situation, and an object thereof is to provide a reinforcing method capable of easily and easily reinforcing an existing RC column.

  The RC column reinforcing method according to claim 1 of the present invention includes a step of covering the periphery of the RC column with a panel structure having a slightly larger cross section than that of the RC column to be reinforced, Filling the gap between the panel structure with non-shrink mortar, and the panel structure has four corner members and four flat plate members connecting adjacent corner members. The corner member is formed by providing a concave portion or a convex portion on the inner surface of each side of the equilateral angle steel, and the flat plate member is formed on the outer surface of the steel plate having a predetermined thickness on the concave portion or the convex portion of the corner member. The panel structure is formed by providing a convex portion or a concave portion that conforms to the corner member, and aligning the convex portion or the concave portion of the flat plate member with the concave portion or the convex portion of the corner member, and fixing them with a fastening member. That is configured to assemble We are an butterfly.

  According to the present invention, an existing RC column can be easily and easily reinforced without requiring field welding. Since the corner member used in the method of the present invention is configured to be connected to the flat plate member in the vicinity of the end of the RC pillar, the corner member is formed in a relatively small shape. Can be reduced in size, and can be light and easy to handle.

  Next, a RC column reinforcing method according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. In the RC column reinforcing method according to the preferred embodiment of the present invention, the panel structure 10 that covers the existing RC column is used. The panel structure 10 includes four corner members 12 and four flat plate members 14 that connect adjacent corner members 12.

  The corner member 12 is formed by providing a recess 12a on the inner surface of each side of the equilateral angle steel (see FIG. 4). The recess 12a is formed, for example, by spot facing. The corner member 12 is also provided with an opening 12b for a bolt (fastening member) on each side.

  The flat plate member 14 is formed by providing a convex portion 14a that matches the concave portion 12a of the corner member 12 on the outer surface of a steel plate having a predetermined thickness. Or you may form the flat member 14 by providing the convex part 14a in the steel plate by which the rib was provided in both ends, as FIG. 5 shows. The convex part 14a is formed by welding a plate to the predetermined location of a steel plate, for example. The flat plate member 14 is provided with an opening 14b for a bolt (fastening member) at a location corresponding to the opening 12b of the corner member 12 when combined with the corner member 12.

  By combining the corner member 12 and the flat plate member 14 as described above, the panel structure 10 slightly larger than the cross section of the existing RC column is formed. As a combination method, two L-shaped members are prepared by combining two flat plate members 14 with one corner member 12, and two L-shaped members are arranged around an existing RC column and fastened. You may connect with the member (bolt) 16, or prepare the two members which combined the corner member 12 at the both ends of one flat plate member 14, and distribute the said member on the opposing surface of the existing RC pillar The plate member 14 may be connected by a fastening member (bolt) 16. Alternatively, the panel structure 10 may be arranged around the existing RC pillar in another desired manner.

  As described above, the panel structures 10 are sequentially assembled along the height direction (vertical direction) of the existing RC pillar (see FIG. 3).

  Thereafter, non-shrink mortar is injected into the gap between the existing RC pillar and the panel structure 10. The non-shrinking mortar may be a normal type.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say, it is something.

  For example, in the above embodiment, the corner member 12 is provided with the recess 12a and the flat plate member 14 is provided with the projection 14a. However, the corner member 12 is provided with a projection, and the recess corresponding to the projection. May be provided on the flat plate member 14.

It is the partial cutaway perspective view which showed typically the RC pillar reinforced by the reinforcement construction method which concerns on preferable embodiment of this invention. It is a cross-sectional view of the RC column reinforced by the reinforcing method according to the preferred embodiment of the present invention. It is a front view of RC pillar reinforced by the reinforcement construction method concerning a preferred embodiment of the present invention. It is the figure which showed the corner member used for the reinforcement construction method of this invention. It is the figure which showed the flat plate member used for the reinforcement construction method of this invention. It is an expanded sectional view of the part 6 of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Panel structure 12 Corner member 12a Concave part 12b Opening part 14 Flat plate member 14a Convex part 14b Opening part 16 Fastening member (bolt)

Claims (1)

  1. A method for reinforcing an existing RC pillar,
    Covering the periphery of the RC column with a panel structure having a slightly larger cross section than the cross section of the RC column to be reinforced;
    Filling the non-shrink mortar in the gap between the RC pillar and the panel structure,
    The panel structure has four corner members and four flat plate members connecting adjacent corner members, and the corner members are recessed or protruded on the inner surface of each side of the equilateral angle steel. The flat plate member is formed by providing, on the outer surface of the steel plate having a predetermined thickness, a convex portion or a concave portion that matches the concave portion or the convex portion of the corner member. A method comprising assembling a panel structure by aligning the protrusions or recesses of a flat plate member with the recesses or protrusions and fixing them with a fastening member.
JP2007317843A 2007-12-10 2007-12-10 Rc column reinforcing method Pending JP2009138478A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007317843A JP2009138478A (en) 2007-12-10 2007-12-10 Rc column reinforcing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007317843A JP2009138478A (en) 2007-12-10 2007-12-10 Rc column reinforcing method

Publications (1)

Publication Number Publication Date
JP2009138478A true JP2009138478A (en) 2009-06-25

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JP2007317843A Pending JP2009138478A (en) 2007-12-10 2007-12-10 Rc column reinforcing method

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101852022A (en) * 2010-05-10 2010-10-06 中国电力科学研究院 Method for reinforcing transmission angle steel tower
CN101852034A (en) * 2010-05-10 2010-10-06 中国电力科学研究院 Dual-arc steel section structure design method
JP2011236618A (en) * 2010-05-10 2011-11-24 Eiji Makitani Reinforcement structure of concrete column
RU2498035C1 (en) * 2012-05-11 2013-11-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Самарский государственный архитектурно-строительный университет" (СГАСУ) Spacer for building column reinforcement
RU2507356C2 (en) * 2012-05-11 2014-02-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Самарский государственный архитектурно-строительный университет" (СГАСУ) Method to manufacture spacers for reinforcement of building column
CN103669901A (en) * 2013-12-04 2014-03-26 岩土科技股份有限公司 Method used for reforming pile in underground space into pillar
JP2017031653A (en) * 2015-07-31 2017-02-09 東急建設株式会社 Existing column reinforcement structure and reinforcement method
JP2017031651A (en) * 2015-07-31 2017-02-09 東急建設株式会社 Existing column reinforcement structure and reinforcement method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101852022A (en) * 2010-05-10 2010-10-06 中国电力科学研究院 Method for reinforcing transmission angle steel tower
CN101852034A (en) * 2010-05-10 2010-10-06 中国电力科学研究院 Dual-arc steel section structure design method
JP2011236618A (en) * 2010-05-10 2011-11-24 Eiji Makitani Reinforcement structure of concrete column
RU2498035C1 (en) * 2012-05-11 2013-11-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Самарский государственный архитектурно-строительный университет" (СГАСУ) Spacer for building column reinforcement
RU2507356C2 (en) * 2012-05-11 2014-02-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Самарский государственный архитектурно-строительный университет" (СГАСУ) Method to manufacture spacers for reinforcement of building column
CN103669901A (en) * 2013-12-04 2014-03-26 岩土科技股份有限公司 Method used for reforming pile in underground space into pillar
JP2017031653A (en) * 2015-07-31 2017-02-09 東急建設株式会社 Existing column reinforcement structure and reinforcement method
JP2017031651A (en) * 2015-07-31 2017-02-09 東急建設株式会社 Existing column reinforcement structure and reinforcement method

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