Mojtaba Moosavi - Assistant Professor, IIEES, Tehran, Iran
Shahryar Najafdari - M.Sc. Graduate, IIEES, Tehran, Iran
Ramtin Faraji Rad - M.Sc. Graduate, IIEES, Tehran, Iran
Mohammad Kazem Jafari - Professor, IIEES, Tehran, Iran

The buried pipelines are inseparable section of current society and play a vital role in human’s life. Permanent ground displacement (PGD) due to surface faulting is one of the major factors in defects of pipelines in recent earthquakes that might cause leakage of the materials inside the pipe such as oil and gas to surrounding area, leading to bioenvironmental hazards and economic threaten. Different approaches have been performed to investigate the surface fault rupture hazard regarding continues pipelinessuch as experimental studies (Yoshizaki et al., 2003; O’Rourke et al., 2005; Sim et al., 2011; Rojhani et al., 2012; Jalali et al., 2017) numerical modeling (Takada et al., 2001; Ogawa et al., 2002; Joshi et al., 2011; Vazouras et al., 2012; Zhang et al., 2015) and analytical approaches (Newmark and Hall, 1975; Kenedy et al., 1977; Wang and Yeh, 1985; Karamitros et al., 2007, 2011). In this paper, based on some 1-g physical modeling tests, clear perspectives of response of buried pipe with elbows constraints to reverse faulting are presented. In the program of physical modeling tests of the present study, in addition to test on two free ends pipe, attempts have been made to perform tests on constrained pipes. The three tests performed by the reverse fault propagation simulator device in this study is presented in Table 1.

Buried pipe, Physical modeling, Reverse faulting