Abstract
Strain-dependent shear moduli of cohesive soils at K-NET Anamizu and JMA Wajima were estimated using the strong ground motions recorded in the 2007 Noto-Hanto Earthquake. The estimated shear moduli of the soils are in good agreement with those measured in the laboratory for the soil samples obtained from the sites, when the generated pore water pressure is taken into account. The pore pressure ratios induced by the main shock were estimated to be 0.4 at Anamizu and 0.3 at Wajima, suggesting that not only the cyclic shearing but also pore water pressure generated during earthquake shaking could have strong effects on the shear modulus reduction of cohesive soils.
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