Abstract
In this report, the ground displacement was estimated from the record of the strong motion observation and the numerical simulation for the mid Niigata prefecture earthquake in 2004, and the damage of the water supply pipelines and the estimated ground displacement were compared.
As the result, it was found that the maximum, horizontal displacement of approximately 80cm had been momentarily generated in the Near-field before the permanent displacement of approximately 50cm was generated. Moreover, it is thought that the dynamic displacement of the ground level was more than ten times larger than the design displacement of the seismic design codes.
