In this paper, the structural behavior of R/C arch was investigated by use of the finite element method considering combined geometric and material nonlinearities. Also, the experimental analyses were conducted based on the numerical results. The deep and shallow arches were adopted as the model. The arches were pin supported at both ends and were subjected to asymmetric concentrate loads in vertical direction. The deformation and the load bearing characteristics were investigated from the load- deflection behavior and the crack propagation patterns. From both numerical and experimental analyses, the load bearing behavior and the ultimate strength of R/C arches were in good agreement.