Non-linear finite element modeling and seismic response analysis of a 20-story building with moment resistant frame, steel shear wall and brace systems.

摘要

The objectives of the thesis were to (1) create linear elastic and non-linear inelastic finite element models for a 20-story steel building in Anchorage, Alaska; and (2) perform a preliminary study on the effects of long-duration earthquakes on the building safety.;In this project, a linear elastic model for this building was established using a finite element software PERFORM 3D and verified by using the recorded seismic data. Based on the linear elastic model, a corresponding nonlinear inelastic model and an ultimate capacity model were developed.;Based on the performance-based design concept, nonlinear time history analyses were performed at different levels of earthquake shaking with short vs. long durations.;Comparison of the building performances from short and long duration earthquakes provides an insight on the effects of long duration seismic ground motions on structural response and dynamic instability.