1. 1) Kawashima, K., Unjoh, S. and Azuta, Y.: Seismic Design Procedure of Cable-Stayed Bridges, Part 1, Dynamic Characteristics of Cable-Stayed Bridges from Field Vibration Test Results, Vol. 2388, Technical Memorandum of PWRI, 1986.
2. 2) Tada, H.: The Trends of Construction Technique of Cable-Stayed Bridges, Vol. 2292, Technical Memorandum of PWRI, 1986.
3. 3) Itoh, M. and Katayama, T.: Damping of Bridge Structures, Proc. of Japan Society of Civil Engineers, Vol. 177, 1965.
4. 4) Itoh, M.: Damping Characteristics of Bridge Superstructures, KABSE, Vol. 1, 1986.
5. 5) Kato, M. and Shimada, S.: Statistical Analysis on the Measured Bridge Vibration Data, Proc. of Japan Society of Civil Engineers, Vol. 311, 1981.