NUMERICAL ANALYSIS OF CIRCULAR CONCRETE COLUMNS CONFINED WITH FRP SHEETS UNDER CONCENTRIC AXIAL LOAD

  • Nico Nirwanto Laban Gadjah Mada University, Yogyakarta, Indonesia
  • Andreas Triwiyono Gadjah Mada University, Yogyakarta, Indonesia

Abstract

Effective confinement on a circular reinforced concrete column can increase its capacity and ductility.
Analysis of plain and reinforced concrete columns confined by Fiber-Reinforced Polymer (FRP) sheets
based on nonlinear finite element model are presented. The analysis was done by ATENA v. 4 and GID


v.9.02 software to simulate the behavior of some confined concrete in columns. The models are validated with  some  published  experiment  results.  Comparison  of  the  model  and  experiment  shows  that  the computational model can closely match the observed response characteristics and can adequately predict the stress and deformation of the columns. A series of model of circular column have been tested to quantify the effect of modulus elasticity and tensile strength of the FRP on the capacity and confinement effectiveness of the columns. Based on the analysis results, accurate stress distribution in concrete and FRP is also obtained which improves understanding of the confinement mechanism of the reinforced concrete columns. With the same tensile strength, increasing FRP modulus of elasticity almost doesn’t affect confined compressive strength but makes the FRP work effectively. Increasing FRP modulus of elasticity hardly affects column confinement effectiveness and decreases FRP column ultimate strain. Increasing FRP tensile strength increases compressive strength (16 %) and ultimate strain (33 %) of the FRP column. All of the FRP columns failure is caused by FRP.

Published
2011-08-01
How to Cite
NIRWANTO LABAN, Nico; TRIWIYONO, Andreas. NUMERICAL ANALYSIS OF CIRCULAR CONCRETE COLUMNS CONFINED WITH FRP SHEETS UNDER CONCENTRIC AXIAL LOAD. EACEF - International Conference of Civil Engineering, [S.l.], v. 1, p. 013, aug. 2011. Available at: <http://proceeding.eacef.com/ojs/index.php/EACEF/article/view/366>. Date accessed: 19 may 2024.
Section
Group of Structural and Construction Engineering