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Method for strengthening or repairing an existing reinforced concrete structural element

a technology of reinforced concrete and structural elements, applied in structural elements, building repairs, building components, etc., can solve the problems of difficult bending of steel reinforcements to form spiral steel reinforcements, and the method is not suitable for strengthening or repairing existing structural elements

Inactive Publication Date: 2004-08-12
NAT APPLIED RES LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aforementioned conventional method is disadvantageous in that bending of a steel reinforcement to form the spiral steel reinforcement is difficult and requires a particular instrument to conduct.
As such, the aforementioned conventional method is not suitable for strengthening or repairing an existing structural element.

Method used

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  • Method for strengthening or repairing an existing reinforced concrete structural element
  • Method for strengthening or repairing an existing reinforced concrete structural element
  • Method for strengthening or repairing an existing reinforced concrete structural element

Examples

Experimental program
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Embodiment Construction

[0025] A standard test sample of a rectangular reinforced concrete column was prepared. The reinforced concrete column has a 50 cm.times.50 cm cross-section and a height of 170 cm, and includes twelve #8 longitudinal steel reinforcements, each of which has a yield strength of 412.0 MPa, and a number of #3 lateral steel reinforcements (which serve as ties), each of which has a yield strength of 274.4 MPa. The spacing is about 40 cm for two adjacent lateral steel reinforcements. The concrete of the reinforced concrete column has a strength of about 20.5 MPa. The reinforced concrete column has a foundation with a size of 245 cm.times.180 cm.times.74 cm (length.times.width.times.height) The foundation includes eleven #8 steel reinforcements which are evenly distributed along a periphery of the foundation.

[0026] During the cyclic loading test, a hydraulic axial force (52.5 tons) was applied to the top end of the reinforced concrete column, and a lateral force was applied to one side of t...

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Abstract

A method for strengthening an existing concrete column having a concrete body and a plurality of parallel longitudinal steel reinforcements includes the steps of preparing a steel wire cable that includes strands of steel filaments, winding the steel wire cable on the longitudinal steel reinforcements in a spiral manner relative to a centerline of the concrete body, fastening two opposite ends of the steel wire cable to the longitudinal steel reinforcements, and casting a structural material around the steel wire cable, the longitudinal steel reinforcements, and the concrete body.

Description

[0001] This application claims priority of Taiwanese application No. 091137352, filed on Dec. 25, 2002.[0002] 1. Field of the Invention[0003] This invention relates to a method for strengthening or repairing an existing reinforced concrete structural element, more particularly to a method using a steel wire cable for strengthening or repairing an existing reinforced concrete structural element.[0004] 2. Description of the Related Art[0005] Conventional methods for forming a spiral-reinforced concrete column normally includes the steps of pre-forming lateral reinforcements, either circular hoop steel reinforcements or two C-shape stirrups lap spliced together reinforcements, that confine an inner space, placing longitudinal steel reinforcements in the inner space in the lateral steel reinforcements and tying the longitudinal steel reinforcements and the lateral steel reinforcements together, disposing form works around the steel reinforcements, and subsequently casting a structural m...

Claims

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Application Information

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IPC IPC(8): E04C3/34E04C5/06E04G23/02
CPCE04C3/34E04G23/0218E04C5/0618E04G23/0225
Inventor LI, YEOU-FONGCHEN, HSI-HSUNWU, CHUAN-WEICHANG, KUO-CHUN
Owner NAT APPLIED RES LAB
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