SEISMIC BEHAVIOR ANALYSIS OF STEEL FRAME BY MULTI-SCALE CALCULATION METHOD

In order to ensure the computational efficiency and to improve the accuracy of finite element seismic analysis of steel frames, nonlinear finite element model is established using general finite element software ABAQUS. The application of multi-scale model in solving seismic behaviour of steel frames is discussed. The steel beam-column connections, members and multi-scale models are established, and then are proved to be valid through comparisons with typical connection tests. Elastic-plastic time-history analysis is performed to the steel frame with different height under typical seismic waves, and the computation efficiency is compared between several models. The results show that: multi-scale finite element model, with good computational efficiency, can simulate the boundary conditions of components under complex loads; with more layers involved and longer earthquake duration, the advantage becomes more evident, proving the use of multi-scale model is a balanced solution between accuracy and computation cost.