地理情報システムを用いたライフラインシステムの地震時挙動評価

Abstract

Along with the recent progress in earthquake engineering, a bulk of technical information is now available pertaining to seismic resistant design, analysis, construction and retrofit of buildings and lifeline physical systems. At the same time, well developed methods are in place to evaluate the system's seismic performance not just from physical but also from functional points of view. This paper presents a quantitative method of evaluating the lifeline seismic performance analysis for water and electric power systems utilizing Geographic Information Systems. Taking new damage models and system redundancy into consideration, the performance degradation due to earthquake is clearly characterized visually. In addition, lifeline system interactions which have been observed under earthquake conditions are evaluated quantitatively.It indicates that designing effective retrofitting and/or restoration strategy, the interaction effect should be taken into account.