Abstract
Love weve propagation is essentially equivalent to shear vibration of layered media. On this basis, with the introduction of a common assumption which has been employed in vibration analysis of structures, a simplified procedure is formulated to evaluate ground motion resulting from Love wave propagation in visco-elastic media. As the procedure allows us to use vibration mode shapes of an elastic system without viscous damping, we can easily evaluate response of a visco-elastic layered system in almost the same way as for a damped single degree of freedom system. In addition, a new index called a modal response factor is presented to demonstrate its usefulness and some comments are discussed for laboratory experiments.
