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http://dx.doi.org/10.4334/JKCI.2013.25.5.529

Nonlinear Analysis of FRP Strengthened Reinforced Concrete Columns by Force-Based Finite Element Model  

Cho, Chang-Geun (School of Architecture, Chosun University)
Publication Information
Journal of the Korea Concrete Institute / v.25, no.5, 2013 , pp. 529-537 More about this Journal
Abstract
The aim of the current study is to develop a nonlinear isoparametric layered frame finite element (FE) analysis of FRP strengthened reinforced concrete (RC) beam or column members by a force-based FE formulation. In sections, concrete is modeled in the triaxial stress-strain relationship state and the FRP sheet is modeled as layered composite materials in two-dimension. The element stiffness matrix derived by the force-based FE has the force-interpolation functions without assuming the displacement shape functions. A lateral load test of RC column strengthened by GFRP sheets was analyzed by the developed force-based FE model. From comparative studies of the experimental and analysis results, it was shown to compare with the stiffness FE method that the force-based FE analysis could give more accurate predictions in the overall lateral load-deflection response as well as in nonlinear deformations and damages in the column plastic hinge region.
Keywords
force-based finite element; FRP strengthening sheet; reinforced concrete column; nonlinear analysis;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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