A disastrous earthquake struck central Taiwan at 01:47 of September 21, 1999 (Taiwan local time). The Seismology Center of the Central Weather Bureau (CWB) determined the magnitude of this earthquake to be ML 7.3 (CWB) and MW 7.7 (Harvard CMT). The earthquake caused heavy casualties and structural damage to bridges and buildings. In order to protect concrete structures against earthquakes, the reversed cyclic and dynamic behavior of concrete structures needs to be accurately predicted. In this seminar, the Cycle Softened Membrane Model developed at the University of Houston is introduced. This Model is implemented to a finite element program based on the framework of OpenSees to predict the behavior of reinforced concrete structures. The program is able to predict the nonlinear behavior of reinforced concrete structures subjected to static, reversed cyclic, and dynamic loading. The program was validated with five series of tests on framed shear walls and bridge columns. It is found from the comparison that both the predicted results and experimental data have very good agreement.