The main aspect in the design of reinforced concrete buildings is to implement a "strong column weak beam" system in which the gradual collapse of the beam or slab until the column. One of the nonlinear analysis of reinforced concrete beams using fiber plastic hinges. This article describes the use of fiber analysis, to analyze the behavior of self-compacting concrete beams under static loads. The roller-joint support beam was compared between experiments and with fiber analysis. The beams are divided vertically and horizontally as small as possible. Concrete model and reinforcing steel model are modeled with nonlinear model. The results of the analysis show the same load-deflection curves at elastic range. After the elastic range is exceeded, there is a difference in the loaddeflection curve between by experiment and by the fiber model analysis, but the ultimate loads are greater than the ultimate load of ACI. The stress-strain curve of tensile reinforcing steel has reached a nonlinear condition, but the stress-strain curve of compressive reinforcing steel has not reached a nonlinear condition. The stress-strain curve of concrete under compressive conditions reaches nonlinear conditions.