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Polymers 2014, 6(1), 59-75; doi:10.3390/polym6010059

Modified Johnston Failure Criterion from Rock Mechanics to Predict the Ultimate Strength of Fiber Reinforced Polymer (FRP) Confined Columns

Architecture Faculty, Yildiz Technical University, Istanbul 34349, Turkey
Received: 31 October 2013 / Revised: 16 December 2013 / Accepted: 17 December 2013 / Published: 30 December 2013
(This article belongs to the Special Issue Selected Papers from "SMAR 2013")
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Abstract

The failure criteria from rock mechanics, Hoek-Brown and Johnston failure criteria, may be extended and modified to assess the ultimate compressive strength of axially loaded circular fiber reinforced polymer (FRP)-confined concrete columns. In addition to the previously modified Hoek-Brown criterion, in this study, the Johnston failure criterion is extended to scope of FRP-confined concrete, verified with the experimental data and compared with the significant relationships from the current literature. Wide-range compressive strengths from 7 to 108 MPa and high confinement ratios up to 2.0 are used to verify the ultimate strengths in short columns. The results are in good agreement with experimental data for all confinement levels and concrete strengths.
Keywords: confined concrete; fiber-reinforced polymer; axial strength; rock mechanics; Mohr-Coulomb; Hoek-Brown; Johnston confined concrete; fiber-reinforced polymer; axial strength; rock mechanics; Mohr-Coulomb; Hoek-Brown; Johnston
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Girgin, Z.C. Modified Johnston Failure Criterion from Rock Mechanics to Predict the Ultimate Strength of Fiber Reinforced Polymer (FRP) Confined Columns. Polymers 2014, 6, 59-75.

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