IMPROVEMENT OF DAMAGE PREDICTION EQUATIONS FOR LOW-PRESSURE GAS PIPELINES BASED ON ULTRA HIGH DENSITY SEISMIC MOTION RECORDS

Abstract

 Tokyo Gas has introduced the super-dense real-time monitoring earthquake system, SUPREME, composed of ultra high density seismographs for the purpose of prevention of secondary disasters at the time of earthquake. SUPREME collects seismic observation information promptly, identifies blocks to be stopped immediately, plays an important role to predict damage to the pressure gas conduit and supports supply stop judgment according to the degree of damage. In this study, the authors investigate the damage of low pressure gas pipelines in the Great East Japan Earthquake by classifying it according to the characteristics of damage by analyzing considering the influence of terrain and reviewing the composition of the damage prediction equations.