Techno Press
You logged in as Techno Press

Computers and Concrete
  Volume 17, Number 1, January 2016 , pages 67-86
DOI: https://doi.org/10.12989/cac.2016.17.1.067
 


Fiber method analysis of rc beam retrofitted with turnbuckle external post-tensioning
Bernardo A. Lejano

 
Abstract
    Strengthening as well as correcting unsightly deflections of reinforced concrete (RC) beam may be accomplished by retrofitting. An innovative way to do this retrofitting that is proposed in this study utilizes turnbuckle to apply external post-tensioning. This Turnbuckle External Post-Tensioning (T-EPT) was experimentally proven to improve the serviceability and load carrying capacity of reinforced concrete beams. The T-EPT system comprises a braced steel frame and a turnbuckle mechanism to provide the prestressing force. To further develop the T-EPT, this research aims to develop a numerical scheme to analyze the structural performance of reinforced concrete beams with this kind of retrofitting. The fiber method analysis was used as the numerical scheme. The fiber method is a simplified finite element method that is used in this study to predict the elastic and inelastic behavior of a reinforced concrete beam. With this, parametric study was conducted so that the effective setup of doing the T-EPT retrofitting may be determined. Different T-EPT configurations were investigated and their effectiveness evaluated. Overall, the T-EPT was effective in improving the serviceability condition and load carrying capacity of reinforced concrete beam.
 
Key Words
    fiber method, retrofitting, external post-tensioning, reinforced concrete beam, turnbuckle
 
Address
Bernardo A. Lejano: Department of Civil Engineering, De La Salle University, 2401 Taft Avenue, Manila, Philippines
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2022 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: info@techno-press.com