Abstract
This paper presents the results of short span concrete-filled fiber reinforced polymer (FRP) tubes filled with different recycled coarse aggregate (RCA) replacement ratios. The mechanical response of recycled concrete-filled FRP tubes (RCFFTs) under flexural load was examined to investigate the influence of RCA as an in-filled material. The experimental results were compared with the simplified finite element model to estimate the failure behavior of the test units. RCFFTs with a 100% RCA replacement ratio showed a similar bending behavior compared to natural aggregate concrete-filled FRP tubes. The flexural behavior of 100% recycled aggregate concrete could be complemented and utilized because of the high strength and high stiffness of the FRPs.
Highlights
Construction waste material has gradually increased due to the reconstruction of old deficient structures
This study investigates the possibility of utilizing recycled concrete as in-filled material for fiber reinforced polymer (FRP) tubes in order to increase the use of recycled materials
3 Finite Element Analysis This study presented the simplified finite element analysis (FEA) model for recycled concrete-filled FRP tube structures
Summary
Construction waste material has gradually increased due to the reconstruction of old deficient structures. In such a situation, it is preferable to use recycled concrete as a structural member to obtain new results and to minimize environmental pollution caused by industrial activities. Several experimental studies on the structural behavior and mechanical strength of recycled concrete beams have been performed (1973; Ignjatović et al 2017; Fathifazl et al 2011; Silva et al 2015). The tension of recycled aggregate concrete must be reinforced by tension carrying material. Fiber reinforced polymers (FRPs) have been extensively considered as an alternative material for tension carrying reinforcement (Lee et al 2017a, b, c, d). Concrete-filled FRP tubes have been widely investigated as generation
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