An implementation of modal pushover analysis for multistory buildings in ANSYS

Abstract

Evaluated is the implementation of a modal pushover analysis for a multistory building in the finite element program ANSYS. In this analysis method the seismic demand of the inelastic system is determined by a pushover analysis using the inertia force distribution of each mode. The total estimate is obtained by combining the results of the respective modal demands. Finally these results are compared with results obtained by nonlinear response history analysis and with results from other scientific studies. The thesis is structured as follows: the theory of the modal pushover analysis and the implementation for a nonlinear system in ANSYS is discussed in the first two chapters. Subsequently a 9 story building from the SAC project is chosen and described for the implementation of the nonlinear problem. In the last chapters, the results are evaluated and a conclusion is drawn.