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Structural Engineering and Mechanics Volume 32, Number 1, May10 2009 , pages 147-165 DOI: https://doi.org/10.12989/sem.2009.32.1.147 |
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Stochastic value index for seismic risk management of existing lifelines |
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Takeshi Koike and Toshio Imai
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| Abstract | ||
| This study proposes a certain measure or investment strategy for decision making associated with seismic retrofitting. This strategy reduces the risk of a large-scale malfunction such as water supply loss under seismic risks. The authors developed a stochastic value index that will be used in the overall evaluation of social benefit, income gain, life cycle costs and failure compensation associated with existing lifeline systems damaged by an earthquake during the remaining service period. Optimal seismic disaster prevention investment of deteriorated lifeline systems is discussed. Finally, the present study provides a performance-based design method for seismic retrofitting strategies of existing lifelines which are carried out using the target probabilities of value loss and structural failure. | ||
| Key Words | ||
| stochastic value index; seismic risk management; seismic investment; existing lifeline. | ||
| Address | ||
| Takeshi Koike: Tokyo City University, Tokyo, Japan Toshio Imai: JFE Engineering Corporation, Tokyo, Japan | ||