Mohsen Oghabi - Department of Civil Engineering, College of Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Mehdi Khoshvatan - Young Researches and Elite Club, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Aminaton Marto - Faculty of Civil Engineering, University Technology Malaysia, ۸۱۳۱۰ UTM Johor Bahru, Johor, Malaysia

In this paper, the response of buried steel pipeline subjected to the strike–slip fault displacement is studied. This studyaimed to identify the seismic fault under the pipe at the intersection of large displacement (up to 3 meter fault displacement)and identify failure modes in the pipe. Innovation studies the effect of thickness ratio of the diameter of the pipe failuremodes of the fault displacement. The nonlinear finite element method analysis was conducted. By using ABAQUSsoftware, nonlinear finite element analysis was carried out on the pipeline under fault displacement. Numerical modellingaimed at obtaining the amount of displacement corresponding to the nonlinear behaviour in the pipeline, as well asidentifying failure modes pipes in displacement from 0.2 to 3 meter in diameter to thickness ratio, taking into account theimpact of the pipeline. The results showed the nonlinear behaviour of the displacement 57.5 cm pipeline damage starts andthe displacement of 1 meter buckling occurs in pipes. The displacement of 1 meter fault, failure mode is local bucklingpipe, and displacement and deformation of the pipe is 1 meter looks like the letter S. The displacement of 1.5 meter high(3 meter) failure mode tube is wrinkling. And deformation of the pipe in the fault displacement of 1.5 meter, like the letterZ. With the increase in displacement from 1.5 meter to high wrinkling occurs in pipes and up to 3 meter displacementcontinues. Plastic strain in the fault displacement of 80 cm in diameter to thickness ratio of 112 and 96 occurs, Plastic strainratio of diameter to thickness of 86 does not occur. Reduction in the diameter of the thickness has a positive impact onreducing plastic strain in the pipe.

Buried Pipelines; Strike Slip Fault; Buckling; Fault Displacement