Abstract
This study proposes a new strain model for concrete with discrete fiber-reinforced polymer (FRP) confinement. An energy absorption factor for discretely FRP confined concrete and a strain reduction factor of FRP were proposed. The energy absorption factor and strain reduction factor in conjunction with an available strength model of concrete with FRP confinement were then used to develop a new strain model for concrete with discrete FRP confinement based on the strain energy balance principle. The new strain model was compared with available strain models suggested for concrete with FRP confinement. It was found that the strain model proposed in this study was more accurate than the available strain models in predicting the ultimate axial strain of concrete with discrete FRP confinement.
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