STUDY ON BEHAVIOR OF SEISMIC TYPE DUCTILE IRON PIPES INFLUENCED BY MULTIPLE GROUND DEFORMATION IN LIQUEFIED GROUND

Abstract

In earthquake, liquefaction have caused large-scale ground deformation in the soft ground. Therefore, buried water pipelines were damaged seriously. Seismic type ductile iron pipes have never damaged be-cause those joints have extension and contraction function, bend performance, and separation preventing performance. However, we have not clarified how pipelines behave when they were influenced by multiple ground deformation. In this study, we analyzed the behavior of pipeline composed of seismic type ductile iron pipes when the pipelines were influenced by multiple ground deformation, using ground displacement measured at the 1995 Hyogoken-Nanbu Earthquake.