DYNAMIC ANALYSIS OF TOP BASE FOUNDATION STRUCTURES SUBJECT TO EARTHQUAKE AND CONSIDERING SOIL-STRUCTURE INTERACTION
Recently, a new foundation method which is called Top Base method has attracted engineer’s attention in the world. It is used on very soft ground to reduce the consolidation settlement and to increase the bearing capacity of a foundation. Many medium and high-rise buildings in South Korea, Japan and Vietnam have been applied this method which showed stability, constructiveness and economic efficiency. The purpose of this paper emphasizes on the dynamic analysis of structures subject to earthquakeand considering SoilStructure Interaction (SSI), in which the soil is reinforced by Top Base foundation. The obtained results of natural frequencies and displacements at the top of SSI structures are compared to that of fixed-base models. The results are also presented for the cases of SSI structures with and without Top Base foundations. In addition, the effects of Top Base foundation to the dynamic analysis will be investigated for structures with the varying of: (1) soil’s characteristics, and (2)the number of structural stories. The presented results will show the effectiveness and preciseness of using Top Base foundation in the dynamic analysis of structures considering Soil-Structure Interaction.