Abstract
The effects produced in the relative displacement and average strain, whose exact estimation is indispensable for earthquake-resistant design of pipeline structures, are investigated, when the distortion of seismic waves is also taken into consideration as well as their propagation. As one reason for wave distortion a dispersive wave such as Love wave is considered. This wave is assumed as a stationary wave with respect to both time and place having the same power spectral density function at every location. The spectra of the relative displacement and average strain are formulated, and their characteristics (predominant frequency and r. m. s. value) are examined. Then, by means of simulation technique of propagating dispersive waves, the analytical results are proved.
