In general, it is difficult to calculate floor accelerations of main frames in non-linear seismic responses for seismic design of non-structural components. A formula to calculate them without time history analysis and eigenvalue analysis has been proposed by authors. Based on the formula, this paper verifies applicability of the formula to real building models and proposes a practical way of setting strength factor in the formula. By comparing the results by time history analysis, it is confirmed that the formula gives good estimation for floor accelerations.
