Next Article in Journal
Rethinking Design and Urban Planning for the Cities of the Future
Next Article in Special Issue
Improving the Impact of Commercial Paint on Indoor Air Quality by Using Highly Porous Fillers
Previous Article in Journal
Clash Detection or Clash Avoidance? An Investigation into Coordination Problems in 3D BIM
Article Menu
Issue 3 (September) cover image

Export Article

Open AccessArticle
Buildings 2017, 7(3), 74; doi:10.3390/buildings7030074

Simplified Design of FRP-Confined Square RC Columns under Bi-Axial Bending

1
Department of Civil Engineering, Sanandaj Branch, Islamic Azad University, Sanandaj 6616935391, Iran
2
Department of Civil Engineering, Marivan Branch, Islamic Azad University, Marivan 6671695853, Iran
3
Department of Geotechnical Engineering, Mazandaran Institute of Technology, Babol 6617974554, Iran
*
Author to whom correspondence should be addressed.
Received: 26 June 2017 / Revised: 1 August 2017 / Accepted: 10 August 2017 / Published: 21 August 2017
(This article belongs to the Special Issue Sustainable Building Materials)
View Full-Text   |   Download PDF [3051 KB, uploaded 21 August 2017]   |  

Abstract

Available guidelines do not provide design procedures for the general case of retrofitting reinforced concrete (RC) columns using fiber reinforced polymer (FRP) sheets subjected to simultaneous bi-axial flexural and axial loads. In many practical cases, columns essentially undergo simultaneous axial force and bi-axial bending moments, especially in in-situ construction. This paper suggests a simplified design method based on the equivalent uni-axial moment concept to calculate the required number of layers FRP sheets for retrofitting RC square columns. The proposed procedure is then verified against available bi-axial moment and axial force test data found in the literature. Results demonstrate that the proposed procedure is appropriate for practical applications with acceptable accuracy. It also appears that retrofitting RC square columns by longitudinal fiber arrangement is only effective for columns with tension-controlled behavior, while transverse and combined longitudinal-transverse arrangements are more effective in enhancing the load bearing capacity of both the compression- and tension-controlled columns. A design example will also be presented. View Full-Text
Keywords: RC columns retrofitting; strengthening; biaxial bending; FRP; interaction curve RC columns retrofitting; strengthening; biaxial bending; FRP; interaction curve
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Manie, S.; Jami, E.; Azarian, Z. Simplified Design of FRP-Confined Square RC Columns under Bi-Axial Bending. Buildings 2017, 7, 74.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Buildings EISSN 2075-5309 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top