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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 9/10
Edited by: B.H.V. Topping
Paper XIII.1

Sensitivity Study of Optimum Seismic Intensity based on Minimization Method of Expected Total Cost

M. Matsushima, K. Matui and S. Ide

Tokyo Electric Power Services Co., Tokyo, Japan

Full Bibliographic Reference for this paper
M. Matsushima, K. Matui, S. Ide, "Sensitivity Study of Optimum Seismic Intensity based on Minimization Method of Expected Total Cost", in B.H.V. Topping, (Editor), "Proceedings of the Fourth International Conference on Civil and Structural Engineering Computing", Civil-Comp Press, Edinburgh, UK, pp 73-80, 1989. doi:10.4203/ccp.9.13.1
Seismic design of most structures has been made based on the concept, of seismic coefficient, for which 0.2g is commonly used. However the adequacy of the value has been subjected to constant arguments. In this study RC structure is assumed to have a square cross section with balanced reinforcement and be represented by single-degree-of-freedom (SD0F). Seismic coefficient, column height and column cross section are chosen as structural parameters, and maximum acceleration and types of waves are chosen as input wave parameters. Inelastic dynamic analysis is conducted on each set of parameters to obtain the corresponding ductility factor, which is considered as an index to structural damage. Optimum yield seismic coefficient, is determined from total cost, expectancy by introducing loss function defined as a function of ductility factor.

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