Abstract: The objective of this study is to develop a simplified seismic performance based design method which reduce the repetition cycles of nonlinear process. The peak ground accelerations are estimated using earthquake data along the Sagaing Fault for Mandalaycity in Myanmar. The evaluated yield accelerations of twenty case studies of the seismic force resisting systems that complying with the performance objectives are documented as a data bank based on the current analysis and design procedure. Then, they are converted to a proposed yield acceleration equation using second-order polynomial regression. This method is also verified by the total of four buildings based on different number of stories. By introducing, this proposed yield acceleration at the initial stage of analysis and design as a simplified method, some repetitions of the nonlinear process can be reduced.Fragility curves are developed for performance based buildings on different peak ground accelerations and their damage probability is compared. The vulnerability of the buildings is estimated in terms of vulnerability index to assess the performance of the building.