Seismic Reliability And Cost Evaluation For A
Hospital Lifeline Network System
Author(s)
K. Fuchida
Abstract
This paper presents an evaluating method for seismic reliability and costs of a
lifesaving lifeline connecting to a hospital during an earthquake. By using the
reliability analysis method for a lifeline network based on the Monte Carlo
method, reliability of a virtual model and a real one of Yatsushiro-city water
supply pipeline network is evaluated. Numerical computations are performed for
models with various conditions of ground and pipes. As a result, in a case of
seismic intensity 5, the reliability of a pipeline connecting to a hospital near the
sea side is low. In a case of seismic intensity 6, all nodes connecting to hospitals
have very low reliability and this suggests that other methods of preparing for
earthquakes are needed except improving method of conditions of grounds or
pipes.
Keywords: lifeline, reliability, network, cost.
1 Introduction
Severe damages of lifeline systems during earthquake much affect the social
activity and urban life of citizens. It is very important that aseismic investment
for lifesaving lifeline systems is performed in view of fast recovery of
economical and social works in urban area after earthquakes.
This study aims to investigate the seismic reliability and costs of a lifesaving
lifeline connecting to a hospital during earthquake. The cost is evaluated by the
sum of aseismic investment (mainly pipeline reinforcement and ground
improvement), restoration cost and system-down cost with the system reliability,
and then discuss the effective investment by minimizing the total cost of every
pre-investment and post-repairing cost. For the assumption model of water
Keywords
lifeline, reliability, network, cost.
Related Book
Other papers in this volume
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