Analytical method for seismic performance of gas distribution pipelines renovated by the hose lining method

摘要

1. INTRODUCTION Buried pipelines in seismically active regions may suffer damages from ground deformation due to large earthquakes. In the past, damage to low-pressure gas distribution pipelines was caused by major earthquakes, such as the Southern Hyogo prefecture earthquake in 1995, the Niigataken Chuetsu-oki earthquake in 2007, the 2011 earthquake off the Pacific coast of Tohoku. As a result, city gas companies in Japan have been taking measures to protect their pipelines against large earthquakes.