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Experimental behaviour and deflection of low‐strength concrete beams reinforced with FRP bars
Author(s) -
Confrere Adeline,
Michel Laurent,
Ferrier Emmanuel,
Chanvillard Gilles
Publication year - 2016
Publication title -
structural concrete
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.912
H-Index - 34
eISSN - 1751-7648
pISSN - 1464-4177
DOI - 10.1002/suco.201500046
Subject(s) - serviceability (structure) , structural engineering , deflection (physics) , fibre reinforced plastic , limit state design , flexural strength , compressive strength , limiting , materials science , corrosion , optimal design , reinforced concrete , engineering , composite material , computer science , physics , mechanical engineering , optics , machine learning
Abstract FRP rebars with low compressive strength concrete is desirable in order to avoid the accelerated corrosion processes that could occur with steel rebars. For this purpose, an experimental programme was designed to identify the failure modes and bending behaviour. The experimental results are compared with equations from ACI 440.1R‐06, CSA S806‐12 and other design codes as well as with other results from a review of the literature. The comparisons indicate that the resistance moment is well predicted by codes for flexural failure. At ultimate loads, the deflection of the beams is further underestimated compared with the deflection of Reinforced Concrete beams with a higher compressive strength. An analytical simulation of 690 beams indicates that deflection is the major limiting criterion at the serviceability limit state. Finally, the formulation problem of the optimal FRP design for reinforced concrete beams can be turned into a programming problem. The space of the feasible design solutions and the optimal solutions can be obtained using only a reduced number of design variables and an existing design method.