تحليل پويا و غيرخطي پي تحت بار ماشين هاي ارتعاشي

Nonlinear Analysis for Foundation-under Dynamic Loads

Nowadays, usage of heavy industrial machines has been increased rapidly and special knowledge for geotechnical engineers is required for convenient design of machine foundations. In this paper conventional methods for analysis of machine foundations have been studied. All of these approaches assume that soil behavior is elastic and homogeneous. In addition most of these methods neglect shape of foundation. In this paper, ANSYS5.4 is used for better analysis of machine foundation. Using this powerful software, a new model is proposed that can consider both soil and foundation behavior together. Applying this model, determination of foundation displacement is possible. Also, foundation settlement located on the multi-layered soils„ embedded foundation and effect of foundation shape on the behavior of foundation under dynamic loads can be studied. Finally results of proposed model have been compared with that of conventional method.