抄録
Using the earthquake ground motion records obtained by a very densely located seismometer network, it has been attempted to find a rational solution for calculation and analysis of ground strains.Two of the best records so far obtained by the network have been analyzed in detail. Time histories as well as frequency properties of ground strains have been evaluated and the results were compared with the directly measured strains in the ground and the strains produced in a steel pipe and in the joints of aductile-iron-cast buried pipe.
