تاثير الگوي پوشش و نوع ورقه هاي FRP در مقاوم سازي دالهاي بتني با الياف FRP

Slabs are most effective part of structural resistance system, so strengthening of slabs will improve the total resistance capacity of structure. On the other hand pattern of coverage, number and type of FRP sheet would have major effective in results. Therefore, in this paper we have studied retrofitting of concrete slabs using FRP. To this end, 12 reinforced concrete slabs using the ABAQUS software were modeled. Each slab with different configurations and thicknesses, using different FRP sheet strengthened and validation of numerical studies using available laboratory data were evaluated. Results indicated that because of their dimensions, slabs show two-way behavior so the best way to slabs strengthening is the use of CFRP sheets is in the lower level of per both transverse and longitudinal direction (grid)