International Congress on Recent Innovations in Engineering, Science and Technology - Istanbul - Turkey (2019-10-31)

effects of the earthquake on pipelines passing through the inclined surface
Due to widespread use of oil, gas and water pipelines and the necessity of crossing these line through uneven areas with high seismicity of our region, the effects of the earthquake on pipelines passing through the inclined surface is of great importance. Tabas city has been chosen for a case study in this research and the investigation has been done by numerical modeling of the buried pipeline by employing the ABAQUS finite element software. Dynamic analysis has been done by considering an elastoplastic soil and nonlinear slippage between the soil and pipe. The soil behavior has been simulated by the real seismic record of earth acceleration and the given boundary conditions; and finally, the parameters of pipeline depth, angle of slope, soil properties and etc. have been investigated in this study. Three depth of 6, 9 and 15m under the seismic load has been analyzed. The results show that by rising the length of the pipeline, the effect of boundary conditions eliminates and it could not be effective for design. By rising the depth and diameter of the pipeline, relocation would be decrease and also the movement of the concrete pipe is less than the steel ones which has been clearly be considered by soil and pile interaction which cause the friction rising between sand and concrete.
Keywords:

Mahdi Feizbahr, Navid Tonekaboni