A PROPOSITION ON THE LINK'S PASSABLE POSSIBILITY AND NODE'S REACHABLE POSSIBILITY WHEN AN EARTHQUAKE HAS OCCURRED —FOR THE EVALUATION OF VULNERABILITY AND THE IMPROVEMENT OF DISASTER PREVENTION'S POLICY IN DENSELY BUILT-UP AREA—

Abstract

From the viewpoint of evaluation of vulnerability in dense urban area when an earthquake has occurred, we propose the link's passable possibility and node's reachable possibility considering the wooden house's destroying rate and location. So, the change of the vulnerability assessment could be visualized by the continuous elevated railroad project in densely built-up area (Kori area, Neyagawa City, Osaka). As a result, the maximum increasing rate is 98.2% in terms of node's reachable possibility, and the maximum decreasing rate is 73.6% in terms of the expecting access time. Using these indexes and the additional indexes, we will be able to quantitatively evaluate the utility pole removal projects and land readjustment projects. Also, in the future, we would like to propose a measure which part should be prioritized from the viewpoint of disaster emergency, recovery plan and disaster prevention's plan.