In this paper, the peeling behavior and the spalling resistance effect of externally bonded continuous fiber sheets (CFS) were firstly investigated experimentally through a series of punching shear tests. CFS applied concrete slabs with a hole in center were used for the test specimens. Specimens were varied in scale of slabs, layers and their fiber directions of CFS, diameters of spalling columnar concrete. It was found from the experiments that the maximum load of punching shear with bonded orthogonal two layers of CFS was extremely higher than the case of one layer of CFS.
Secondly, a fracture energy method was proposed for modeling the membrane peeling behavior and for evaluating spalling resistance effect of externally bonded CFS. It is realized that only one material parameter, interfacial fracture energy G_c along CFS-concrete interface, was necessary to represent the interfacial behavior. Finally, the close agreement between the predicted results from the proposed analytical method and the experimental results was demonstrated by means of some numerical examples.