Abstract
The ground which needs consideration for liquefaction is increasing because the design seismic wave for infrastructures is tend to be severer. Many existing studies have mentioned the relationship between the occurrence of liquefaction by earthquake and liquefaction judging method. Although, the relationship between the structural damage and the potential of liquefaction index is less studied.
We investigated the structural damage and the occurrence of liquefaction where strong seismic motion was observed along the Shinkansen railway viaducts in the 2011 off the Pacific Coast Tohoku Earthquake, and the Mid Niigata Prefecture Earthquake in 2004.
The result shows that the relationships between the occurrence of liquefaction and the potential of liquefaction index is similar to existing studies, but those between structural damage and that are less harmonic. And we confirmed that many railway viaducts which had not been designed for liquefaction were not damaged on the liquefaction grounds which could be judged by the potential of liquefaction index.
