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Nonlinear Finite Element Modeling Of Gfrp-strengthened Slender Rectangular Rc Columns With Confinement Deficiency In Plastic Hinge Zone

Submitted2018-03-08
Last Update2018-03-08
TitleNonlinear Finite Element Modeling Of Gfrp-strengthened Slender Rectangular Rc Columns With Confinement Deficiency In Plastic Hinge Zone
Author(s)Author #1
Author title:
Name: V. Zanjani Zadeh
Org: Former Research Associate, 3100, Post Oak Blvd., Houston, Texas, USA
Country:
Email: vzanjan@ncsu.edu

Author #2
Author title:
Name: S. Eshghi
Org: Associate Professor, International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran.
Country:
Email: s.eshghi@iiees.ac.ir

Other Author(s)
Contact AuthorAuthor #1
Alt Email: vzanjan@ncsu.edu
Telephone:
Keywords
AbstractThis paper presents a study on the behavior of slender Reinforced Concrete (RC) columns, with confinement deficiency in plastic hinge zone, strengthened with Glass Fiber-Reinforced Polymer (GFRP) sheets using Finite Element Analysis (FEA). For the purpose of this research, a total of twelve half-scale rectangular RC columns were modeled using ANSYS and subjected to displacement-controlled monotonic lateral load combined with a constant axial load. Ten out of the twelve columns had insufficient transverse reinforcements in the plastic hinge zone to represent the columns that were built before 1971. Five columns were retrofitted up to recommended length from bottom of the column with GFRP wraps. The goal of these analyses was to investigate failure mechanism and to obtain the lateral load-carrying capacity of the columns, as well as to compare them with existing experimental hysteresis loop envelope available from cyclic loading tests. The developed FEA predictions were shown to be in close agreement with the experimental results and observations. The results showed that the FRP jacket in plastic hinge zone can greatly enhance shear and flexural strengths, as well as ductility of the slender RC columns under imposed loading and that it delays the softening of the columns.
Paperview paper 4242.pdf (644KB)

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