PERFORMANCE-BA SED SEISMIC RESPONSE OF BURIED STEEL PIPELINSE

Performance-Based Earthquake Engineering (PBEE) has appeared as a basis of modern earthquake engineering as it attempts to improv e deciding about seismic risk by methods that ar e more informative than current approaches. However, little work has been carried out investigating the seismic response of buried steel pipelines within a performanc e-based framework. In this research the seismic demands of buried steel pipelines are studied in a performance-based context. Several nonlinear dynamic analyses of four buried steel pipe models with different D/t, H/Dratios and different soil properties and differe nt pressures, performed under an ensemble offar-field earth quake ground motion records were scaled to se veral intensity levels to capture the behavior of buried pip eline from elastic response through to global i nstability. Several scalar ground motion intensity measures (IMs) are used to investigate their correlation w ith engineering demand parameter (EDP) which is measur ed by peak axial compressive strain in critical section of pipe. Using regression analysis it is concluded that, velocity-based IMs are the most appropriate ones in evaluating the buried steel pipelines response effic iently.

Keywords:

Performance-based Earthquake Engineering , Continues Buried Pipeline , Intensity Measure , Engineering Demand Parameter , No nlinear Dynamic Analysis