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： 593-600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）： Akio NAKASE, Hirofumi NAKANODO, Osamu KUSAKABE タイトル（英）： INFLUENCE OF SOIL TYPE ON PORE PRESSURE RESPONSE TO CYCLIC LOADING 抄録（英）：
The present paper reports the pore pressure response of soils to static and dynamic loadings, with special reference to the change in soil type from sand to clay. Two way cyclic loading test were performed on the samples which were prepared by mixing a clay and crushed sand so as to obtain a wide range of soil type expressed in terms of sand fraction or plasticity index. Stress amplitude was 10 to 40％ of the undrained static shear strength. In view of strain rate requirement for pore pressure measurement in clay, the frequency was reduced to 0.003Hz. It was found that the pore pressure set up immediately after a number of cyclic loadings increased with the sand fraction, and this trend became marked as the sand fraction approached to about 60％. Results of the cyclic loading tests implied that the stability of cohesive soils in earthquake should be examined, at least, in view of the pore pressure set up in the time of earthquake. In order to demonstrate the effect of pore pressure set up in earthquake, numeral examples were presented. Pore pressure distribution in normally consolidated foundation soil beneath an embankment before and immediately after an earthquake were worked out, and the factor of safety against shear failure were compared. These examples showed an importance of consideration on pore pressure set up in so called cohesive soils in the time of earthquakes, prior to occurance of liquefaction. キーワード（英）： - 記事区分： - 区分 　　　委員会論文集