Within a research program, reinforced ultra high performance concrete (UHPC) panels have been investigated experimentally under biaxial compression-tension loading. The effects of transverse tensile stress and the cracking as a result of the compressive strength have been studied. Based on the experimental results and those of an earlier research program on normal strength concrete (NSC) panels, a proposal for the reduction of the compressive strength of cracked reinforced non-fibered and steel fiber concrete against the applied tensile strain, could be developed.