1. 3) Schnabel P. B., Lysmer J. and Seed, H. B. : SHAKE － A Computer Program for Earthquake response analysis of horizontally layered sites, EERC Report, Vol. 72, No. 12, University of California, Berkley, 1972
2. 5) Ott. N. and Meder, H. G. : Kalman filter as a Prediction Error Filterm, Geophysical Prospecting 20, pp. 549-560, 1970
3. 6) Toki, K., Sato, T. and Kiyono, J. : Identification of structural parameters and input ground motion from response time histories, Proc. of the Japan Society of Civil Engineers, No. 410, pp. 243-251, 1989
4. 12) Owen, D. R. J. and Hinton E. : Finite Elements in Plasticity - Theory and Practice, Pineridge Press Limited, 1980
5. 14) Jennnings, P. C. : Periodic Response of General Yielding Structure, J. Eng. Mech. Div., ASCE, EM2, pp. 131-163, 1964