Abstract: The shell model finite element methods are better than the simplified analytical cable model methods in simulating shell deformation properties of pipe for the response analysis of buried pipeline crossing fault; but the cable model methods are still used in the relevant guidelines in China and other countries. The differences of estimated maximum tension strains of pipes and main factors inducing the differences are investigated based on the calculating results by a shell model method and the Newmark’s cable model method; and an improved Newmark’s cable model method is proposed by introducing an empirical relation with the fault displacement and wave velocity of surrounding soil for the case that the crossing angle between pipeline and faults less than 70 degrees. Furthermore, case studies show that the fitting degree between proposed method and the shell model method is not less than 0.87 for cases with different crossing angles between pipeline and fault and material behaviors of pipes.

Key words: fault rupture, buried pipeline, cable model, shell model, soil layer