Seismic Risk Analysis of Gas Buried Pipeline Network Subjected to Rayleigh Wave

Abstract

The semi-empirical and semi-theoretical method was adopted to simulate the response of gas continuous buried pipelines subjected to Rayleigh wave propagation. Using two earthquake damage states and normal distribution assumption, seismic failure probabilities of pipelines were calculated. The weighted statistical average method was introduced to estimate seismic failure probability of pipeline network. The relations between seismic failure probability, earthquake damage grade and seismic risk level for pipeline network were presented to determine earthquake damage grade and earthquake damage level with respect to seismic intensity. According to the results of numerical example, it is concluded that the gas buried pipelines and its network due to Rayleigh wave propagation effects have high seismic failure risk under seismic intensity above grade â…¦.