部分モードの総合法による地盤-基礎-上部構造物系の三次元地震応答解析

抄録

In this paper the authors developed a new subsystem modes synthesis method as one of the dynamic substructure methods for the analysis of soil-foundation-superstructure for seismic motions. This method has an advantage over the impedance method in that each subsystem (namely, the soil-foundation system and the superstructure) is characterized by the respective vibration modes of appropriately fixed or free interface conditions and the release modes. The accuracy is investigated from the comparison with the impedance method analysis by taking a blast furnacee structure on a grouped piles foundation as an example. A remarkable reduction of computing time is observed for the response analysis of the integrated soil-foundation-superstructure system.