Repair and strengthening system for reinforced concrete structure

Inactive Publication Date: 2015-06-18
JFE CIVIL ENG & CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0050]The repair and strengthening system for a reinforced concrete structure according to the present invention has the following advantageous effects.
[0051](i) The plurality of protrusions are formed on the steel-plate front face that faces the structure surface, and the filler is injected in the space between the structure surface and the steel-plate front face. Consequently, the plurality of protrusions mechanically interlock with the filler, allowing transfer of shear therebetween.
[0052]Accordingly, when a bending load acts on the reinforced concrete structure, the steel plate behaves integrally with the reinforced concrete structure. Consequently, the tensile stress at the structure surface is shared by the steel plate, thereby strengthening the corresponding area. If this area is damaged, this damage is repaired.
[0053](ii) Further, the filler injected in the space between the structure surface and the steel plate

Problems solved by technology

Further, many reinforced concrete structures constructed in the past high growth era are now undergoing deter

Method used

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  • Repair and strengthening system for reinforced concrete structure
  • Repair and strengthening system for reinforced concrete structure
  • Repair and strengthening system for reinforced concrete structure

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0083]A repair and strengthening system for a reinforced concrete structure according to Embodiment 1 of the present invention is used to repair or strengthen a reinforced concrete structure. Hereinafter, a strengthening example will be described with reference to FIGS. 1 and 2, and a repair example will be described with reference to FIG. 3.

(Strengthening Example)

[0084]FIGS. 1 and 2 illustrate a strengthening example for explaining the repair and strengthening system for a reinforced concrete structure according to Embodiment 1 of the present invention. FIG. 1A is a partially see-through front view, FIG. 1B is a sectional side view taken along A-A in FIG. 1A, and FIG. 1C is a sectional side view taken along B-B in FIG. 1A. FIG. 2 is an enlarged front view of a part of a steel plate. These figures are schematic only, and not intended to limit the present invention to the particular forms (such as shapes or quantities) illustrated.

[0085]In FIG. 1, a repair and strengthening system fo...

embodiment 2

[0107]FIG. 4 illustrates a repair example for explaining a repair and strengthening system for a reinforced concrete structure according to Embodiment 2 of the present invention, in which FIG. 4A is a partially see-through front view, FIG. 4B is a sectional side view taken along A-A in FIG. 4A, and FIG. 4C is a sectional side view taken along B-B in FIG. 4A. Portions that are the same as or equivalent to those in Embodiment 1 are denoted by the same reference signs, and a description of these portions is partially omitted. Further, these figures are schematic only, and not intended to limit the present invention to the particular forms (such as shapes or quantities) illustrated.

Repair Example

[0108]In FIG. 4, a repair and strengthening system for a reinforced concrete structure (to be referred to as “repair and strengthening system” hereinafter) 200 uses a steel-plate support member 50 that is square U-shaped, instead of the hang bolt 40 of the repair and strengthening system 100.

[01...

embodiment 3

[0117]FIG. 5 illustrates a repair and strengthening system for a reinforced concrete structure according to Embodiment 3 of the present invention, in which FIG. 5A is a partially enlarged, partially see-through front view, and FIG. 5B is a partially enlarged side sectional view. Portions that are the same as or equivalent to those in Embodiments 1 and 2 are denoted by the same reference signs, and a description of these portions is partially omitted. Further, these figures are schematic only, and not intended to limit the present invention to the particular forms (such as shapes or quantities) illustrated.

[0118]In FIG. 5, a repair and strengthening system for a reinforced concrete structure (to be referred to as “repair and strengthening system” hereinafter) 300 makes it possible to adjust the position of the steel-plate support member 50 in the repair and strengthening system 200 for a reinforced concrete structure. Otherwise, the repair and strengthening system 300 is the same as ...

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PUM

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Abstract

A repair and strengthening system for a reinforced concrete structure has a ribbed steel plate, and a filler. The ribbed steel plate is disposed facing a strengthened area with a predetermined space therebetween. The strengthened area is an area to be strengthened in a structure surface that is a surface of a reinforced concrete structure. The filler is injected in the space between the structure surface and the ribbed steel plate. Ribs are formed on the ribbed steel plate by hot rolling. The ribs protrude from a steel-plate front face that is a side of the ribbed steel plate facing the structure surface.

Description

TECHNICAL FIELD[0001]The present invention relates to a repair and strengthening system for a reinforced concrete structure, in particular, a repair and strengthening system for a reinforced concrete structure which repairs or strengthens the reinforced concrete structure portion of civil engineering structures and architectural structures.BACKGROUND ART[0002]Hitherto, many civil engineering structures (such as beams, floor slabs, bent in landing piers, bridges, concrete lining of tunnels / shafts, box culverts, retaining walls, and caissons) and architectural structures (floor slabs, beams, and columns in large complex buildings or simple roofed and walled structures, chimneys, and silos) have been constructed in reinforced concrete.[0003]Recent years have seen an increase in the number of strengthening works for strengthening existing reinforced concrete structures. These strengthening works are undertaken for purposes such as ensuring safety against powerful earthquakes under consi...

Claims

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Application Information

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IPC IPC(8): E04G23/02
CPCE04G23/0211E04G23/0218
Inventor SHIOTA, KEISUKENAITO, HITOSHIIMASHIO, HIROYUKIKANDA, KYOTARO
Owner JFE CIVIL ENG & CONSTR
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