Experimental Study on Load Transfer Mechanism in Columns Retrofitted by Bonding Precast Segments and FRP Wrapping

Open Access

Year : 2024 | Volume :12 | Special Issue : 02 | Page : 153-165
By

Chidanand C,

Nikhil M Sajjan,

Abhishek M S,

Manoj C M,

Manjunatha L,

Bharathi Ganesh,

Nikhil Kumar S M,

H Sharada Bai,

  1. Student Nitte Meenakshi Institute of Technology, Bengaluru Karnataka India
  2. Student Nitte Meenakshi Institute of Technology, Bengaluru Karnataka India
  3. Student Nitte Meenakshi Institute of Technology, Bengaluru Karnataka India
  4. Student Nitte Meenakshi Institute of Technology, Bengaluru Karnataka India
  5. Professor Nitte Meenakshi Institute of Technology, Bengaluru, Karnataka India
  6. Student SJB Institute of Technology, Bengaluru Karnataka India
  7. Assistant Professor Nitte Meenakshi Institute of Technology, Bengaluru, Karnataka India
  8. Professor Department of Civil Engineering, University Visvesvaraya College of Engineering, Bengaluru Karnataka India

Abstract

An experimental study was conducted to investigate the load transfer mechanism in columns retrofitted with precast segments and Fiber-Reinforced Polymer (FRP) wrapping. As the demand for structural retrofitting grows, it becomes crucial to comprehend the behavior and effectiveness of retrofit techniques to ensure the safety and integrity of existing infrastructure. The study involved subjecting a series of column specimens to axial compression loads in order to evaluate the load transfer characteristics and performance of the proposed retrofit system. Representative reinforced concrete column specimens commonly found in buildings were constructed for the experimental program. A section of these columns was retrofitted by bonding precast segments with FRP wrapping, while control specimens remained un retrofitted. The retrofitted columns underwent monotonic axial compression loads, and their behavior was compared to the control specimens to assess the retrofit technique’s effectiveness. Throughout the experimental tests, various parameters such as load-displacement behavior and failure modes were monitored. Strain gauges and displacement transducers were utilized to capture internal force distribution and deformation characteristics of the retrofitted columns. The collected data facilitated a comprehensive analysis of the load transfer mechanism between the precast segments and the FRP wrapping. The retrofit system demonstrated improved load-carrying capacity, increased stiffness, and enhanced ductility compared to the un retrofitted columns. The primary governing factor of the load transfer mechanism was found to be the interaction between the FRP wrapping and the precast segments, effectively redistributing the applied loads and enhancing the overall performance of the columns.

Keywords: CFRP, micro concrete, epoxy, nito bond pc, retrofitting, column head

[This article belongs to Special Issue under section in Journal of Polymer and Composites(jopc)]

How to cite this article: Chidanand C, Nikhil M Sajjan, Abhishek M S, Manoj C M, Manjunatha L, Bharathi Ganesh, Nikhil Kumar S M, H Sharada Bai. Experimental Study on Load Transfer Mechanism in Columns Retrofitted by Bonding Precast Segments and FRP Wrapping. Journal of Polymer and Composites. 2024; 12(02):153-165.
How to cite this URL: Chidanand C, Nikhil M Sajjan, Abhishek M S, Manoj C M, Manjunatha L, Bharathi Ganesh, Nikhil Kumar S M, H Sharada Bai. Experimental Study on Load Transfer Mechanism in Columns Retrofitted by Bonding Precast Segments and FRP Wrapping. Journal of Polymer and Composites. 2024; 12(02):153-165. Available from: https://journals.stmjournals.com/jopc/article=2024/view=158034

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Special Issue Open Access Original Research
Volume 12
Special Issue 02
Received November 2, 2023
Accepted December 21, 2023
Published June 11, 2024
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