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Title: Behavior of High Strength Concrete - Filled Hybrid Recyclable Large - Small Rupture Strains FRP Tubes under Cyclic Compression

Author(s): Monika Nain, Mohanad M. Abdulazeez, and Mohamed A. ElGawady

Publication: Symposium Paper

Volume: 358

Issue: 9/1/2023

Appears on pages(s): 62-86

Keywords: concrete filled FRP tubes (CFFT), recyclable large-small rupture strains FRP Tubes, PEN, PET, cyclic

DOI: 10.14359/51740231

Date: 9/1/2023

In this study, the cyclic axial compressive behavior of newly proposed concrete-filled fiber-reinforced polymer (FRP) tubes (CFFT) was examined. Different types of FRP, including small rupture strain FRP (SRSFRP) and recyclable large rupture strain FRP (LRS-FRP), were used to reinforce the concrete columns. LRS-FRP is made of polyethylene naphthalate (PEN) and polyethylene terephthalate (PET) and has a high tensile rupture strain (usually greater than 5%), while SRS-FRP has a lower tensile rupture strain of 1-2%. A total of twelve CFFTs were tested to assess the strength, confinement ratio, ductility, ultimate strain, and energy dissipation of the columns. The results showed that the use of LRS-FRP led to improved ductility and ultimate strength in the confined concrete columns compared to the use of SRS-FRP. The study also compared the experimental results to existing analytical models available in the literature and proposed two new models for predicting the ultimate stress-strain behavior of hybrid LRS-FRP.