�@ Œf�ÚŽGŽ��i˜a�j�F “ú–{’n�k�HŠwƒVƒ“ƒ|ƒWƒEƒ€�u‰‰�W Vol�F 5Šª ”N�F 1978”N •Å�F 721-728•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 JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM ’˜ŽÒ�i‰p�j�F Kouki ZEN, Yasufumi UMEHARA, Kouji HAMADA ƒ^ƒCƒgƒ‹�i‰p�j�F LABORATORY TESTS AND IN-SITU SEISMIC SURVEY ON VIBRATORY SHEAR MODULUS OF CLAYEY SOILS WITH VARIOUS PLASTICITIES �´˜^�i‰p�j�F
The effects of the plastic index on the shear moduli of clayey soils were investigated in a resonant column device and a dynamic triaxial test apparatus. It was found that the plastic index affects the low amplitude shear modulus, stress-strain curve and secondary increase in shear modulus. The laboratory. test results were compared with the results obtained from in-situ seismic. survey. The differences of both test results were observed and were discussed. ƒL�[ƒ��[ƒh�i‰p�j�F - ‹LŽ–‹æ•ª�F - ‹æ•ª �@�@�@ˆÏˆõ‰ï˜_•¶�W