�@ Œf�ÚŽGŽ��i˜a�j�F “ú–{’n�k�HŠwƒVƒ“ƒ|ƒWƒEƒ€˜_•¶�W Vol�F 8-2Šª ”N�F 1990”N •Å�F 1155-1160•Å ’˜ŽÒ�i˜a�j�F - ƒ^ƒCƒgƒ‹�i˜a�j�F - �´˜^�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 Hirokazu YOSHIOKA, Yutaka INOUE ƒ^ƒCƒgƒ‹�i‰p�j�F ELASTO-PLASTIC RESPONSE ANALYSIS OF STRUCTURE WITH ECCENTRICITY SUBJECTED TO TORSIONAL GROUND EXCITATION �´˜^�i‰p�j�F
Elasto-plastic response of a structure with eccentricity on a rigid foundation embedded into an elastic half space subjected to a horizontally travelling earthquake motion is analyzed in time domain. A mathematical model in this analysis is composed of an upper structure supported by four elasto-plastic columns on a rigid square foundation and elastic soil ground. Concluding remarks from response analysis are : (1) In case of a slightly interacted structure with soil ground, torsional deformation of an upper structure is suppressed by its elasto-plastic energy dissipation. (2) Torsional ground excitation affects torsional deformation of a foundation sensitively. On the other hand, torsional deformation of an upper structure is influenced mainly by the natural period of the first torsional mode. ƒL�[ƒ��[ƒh�i‰p�j�F - ‹LŽ–‹æ•ª�F - ‹æ•ª �@�@�@ˆÏˆõ‰ï˜_•¶�W