�@ Œf�ÚŽGŽ��i˜a�j�F “ú–{’n�k�HŠwƒVƒ“ƒ|ƒWƒEƒ€˜_•¶�W Vol�F 9-1Šª ”N�F 1994”N •Å�F 1165-1170•Å ’˜ŽÒ�i˜a�j�F ŽðŒü�@—TŽi�C�@‹{–{�@—TŽi�C�@•Ÿ‰ª�@“Ä�M�C�@Šì‘½‘º�@‰pŽi�C�@“àŽR�@�³ŽŸ ƒ^ƒCƒgƒ‹�i˜a�j�F ’n’†˜A‘±•Ç‚Æ�Y‚Ì•¡�‡Šî‘b‚Ì“®“I‘ŠŒÝ�ì—p �´˜^�i˜a�j�F
- ƒL�[ƒ��[ƒh�i˜a�j�F - Œf�ÚŽGŽ��i‰p�j�F PROCEEDINGS OF THE JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM ’˜ŽÒ�i‰p�j�F Yuji SAKO, Yuji MIYAMOTO, Atunobu FUKUOKA, Eiji KITAMURA, Shoji UCHIYAMA ƒ^ƒCƒgƒ‹�i‰p�j�F DYNAMIC INTERACTION OF SOIL AND COMPOSITE FOUNDATION �´˜^�i‰p�j�F
A composite foundation has been employed in a high-rise building on a soft reclaimed soil. The composite foundation usually consists of a wall foundation with internal pile group and an exterior pile group. The behavior of buildings built on such foundations is greatly influenced by soil-foundation interaction during earthquake. In this paper, the dynamic characteristics of composite foundation is investigated by the forced vibration test and the analytical studies using axisymmetric finite element method. A simplified numerical model, which comprises a lumped mass model with dynamic interaction springs is verified by comparing with the test results. ƒL�[ƒ��[ƒh�i‰p�j�F - ‹LŽ–‹æ•ª�F - ‹æ•ª �@�@�@ˆÏˆõ‰ï˜_•¶�W