Modeling of creep in GFRP RC beams

The laws of creep following the Eurocode 2 recommendations are investigated. Analytical study was also conducted including creep under constant stress; successions of increasing stress superposition principle equivalent time and the return creep reloading. The results of this study revealed that in the case of a very short unloading phase, which would be of little influence, this leads to an overestimation of creep deformation. In the limit by succession of very short loading -unloading cycles application of BPEL led to grossly overestimated deformations. This investigation should guide the civil engineer/designer for a better understanding creep phenomenon in GFRP reinforced concrete members.