掲載雑誌（和）： 日本地震工学シンポジウム講演集 Vol： 5巻 年： 1978年 頁： 729-736頁 著者（和）： - タイトル（和）： - 抄録（和）：
- キーワード（和）： - 掲載雑誌（英）： PROCEEDINGS OF JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM 著者（英）： Kazuya YASUHARA, Kazutoshi HIRAO タイトル（英）： STRENGTH AND DEFORMATION OF A SATURATED SOFT CLAY SUBJECTED TO CYCLIC LOADINGS 抄録（英）：
Dynamic and static triaxial tests on a saturated soft marine clay have been carried out under drained and undrained drainage conditions. The paper examines the various problems of the large strain performance of a clay under impulsive-type loadings, and some findings regarding the behavior of saturated clay such as at earthquake are presented. The results firstly indicate that the ultimate dynamic strength at 15％ shear strain in terms of the effective stress is not affected by the frequency of cyclic loadings and the drainage condition but it becomes a little lower than the static one at the same loading conditions. In the other hand, a hyperbolic relation between the pore water pressure and the shear strain is introduced and it is made sure that the relation is independent of the loading method (dynamic or static). In addition, it appears dynamic and static shear strains in triaxial tests are approximately the same in the case of excluding the creep effect. The dilatancy effect developing in cyclic drainedtests is governed not only by the stress ratio but also by the frequency of cyclic loadings. This tendency, which is different from one in undrained cyclic triaxial teats, suggests that the hydrodynamic time lag plays an important part in deformation during drained cyclic loadings of saturated clay with low permeability. It is supposed that it can significantly contribute to deformation analysis of saturated clays under cyclic loads that a relationship between dynamic stress ratio and shear strain except the creep effect does not almost differ from static ones. キーワード（英）： - 記事区分： - 区分 　　　委員会論文集