 |
The objective of this study is to analyze the effects caused by uplift of foundation and soil elastic-perfectly plastic behavior on the dynamic seismic response of a structure. The soil-structure interaction has been modeled by Saint Venant's units mounted in parallel and distributed over the entire width of the foundation.
The model considers the case of small rotation of the base. However, the equations are strongly nonlinear and the obtained system of differential equations is stiff. This was integrated by using the Matlab command ode15s. The response of the structure was studied after that as function of the chosen soil model: elastic or elastic-perfectly plastic. It is shown that the perfectly plastic analysis yield smaller rotational angles and tip displacement when compared with the elastic analysis of the coupled system.
