In recent years, the world - wide standard codes have paid special attention to the coefficient over-strength factor. The effect of this parameter on saving the safety of structures from earthquake is quite postulated. This parameter associated with the Redundancy, Reliability factor by which the structural safety is controlled is added into the standard Codes from 1997. Describing the over-strength parameter, the role of effective factors on it, it's role on the seismic behavior of structure, concrete frames and shear wall, quantitative description of the problem in terms of performing linear and non-linear analyzing of selected structures under incremental push-over analysis constitute some sections of this thesis. In this research, three concrete structures with moment frame system in addition to shear wall with the number of stories 10, 15, and 20 have been modeled using Etabs-Sap software and investigated Adaptive Push-over Analyses (APA) and Customary Push-over Analyses (CPA) and finally the obtained results of over strength factor have been evaluated according to 2800 regulations fourth edition on concrete structures and the values related to these coefficients have been compared with the values of 2800 regulations.