Axial Strains in FRP-Confined Normal- and High-Strength Concrete: An Examination of Strain Measurement Methods

Abstract:

This paper presents an experimental investigation into the axial strain measurement method of fiber reinforced polymer (FRP)-confined normal-and high-strength concrete (NSC and HSC). A total of 15 FRP-confined concrete specimens with circular cross-sections were tested under monotonic axial compression. Axial strain recordings were compared on specimens instrumented with three different measurement methods: axial strain gauges and full-and mid-height linear variable displacement transformers (LVDTs). The ultimate conditions are tabulated for each measurement method and key experimental outcomes discussed. The results indicate that axial strains of FRP-confined HSC are highly sensitive to the instrumentation arrangement and significant differences occur in the results obtained from different measurement methods.

• Periodical: Advanced Materials Research (Volumes 919-921)
• Pages: 23-28
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.919-921.23
• Online since: April 2014
• Authors: Thomas Vincent, Togay Ozbakkloglu*
• Keywords: Axial Strain, Concrete, Concrete-Filled FRP Tubes, Confinement, Fiber Reinforced Polymer (FRP), High-Strength Concrete (HSC), Measurement Method

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