Two constitutive models for steel (Steel01 and Steel02) and two constitutive models for concrete were firstly selected to simulate two pseudo static tests for reinforced concrete columns in OpenSees based on the fiber model. Then, a constitutive model in OpenSees, i.e., Reinforcing Steel, was used to simulate the monotonic loading test, cyclic loading test, fatigue test for steel and the pseudo static test for the reinforced concrete columns. It is found that the constitutive models for concrete fibers are quite applicable for the numerical simulation and the results are not markedly affected by the change of the constitutive model for concrete fibers, while the constitutive models for steel need to be further improved because they can't perfectly meet the precision demand. Different models for steel will lead to different results. The Reinforcing Steel model can effectively improve the precision of the simulations. However, it also has some disadvantages in that it cannot clearly reflect the pinching effect of the hysteresis curves obtained from the cyclic loading tests for steel, the simulation is complex, the calculation results tend to be too conservative and are hard to converge.