Simultaneous ﬂexural and punching strengthening of RC slabs according to a new hybrid technique using U-shape CFRP laminates /Joaquim A.O. Barros, Mohammadali Rezazadeh ⇑ , João P.S. Laranjeira, Mohammad R.M. Hosseini, Mohammad Mastali, Honeyeh Ramezansefat - Barros,Joaquim A.O.