Author(s)

S. Higuchi & T. Matsuda

Abstract

A high earthquake-proof spread foundation system for energy storage tanks S. Higuchi & T. Matsuda Department of Civil Engineering, Technical Research Institute of Obayashi Co., Japan Abstract A high earthquake proof spread foundation for the tank structures named "Seismic action control foundation" was developed. "Seismic action control foundation" consists of a concrete slab and the improved ground under the slab utilizing the deep mixing method. "Seismic action control" effect is theoretically basing on the dynamic soil-structure interaction. In this study, performances of the "Seismic action control foundation" were investigated with numerical analyses. Followings were found £rom the results. (1) Up to 30 % reduction of the base shear of the tank structure is turned out on the "Seismic action control foundation" compared with those of the piled foundation by numerical analyses. (2) It is able to reduce the area of "Seismic action control foundation" up to 50% without decreasing the effect

Keywords