Eksenel basınç kuvveti ve eğilme momentine maruz çelik boruların performans kriterlerinin saptanması.

Buried pipelines are critical infrastructure components which employed for delivering and distributing vital products such as water, gas and oil. Such energy transmission lines might cross fault lines on their routes, undergo tension and compression strains due to crossing angle under permanent ground deformations and severely damaged. Steel pipe failures are expected to be due to tensile loads in terms of design issues. However, in cases where reverse or some strike-slip faults have to be crossed due to forced routing, premature failures may occur under net axial compressive loads. According to the current code, the design principles for pipelines are specified due to maximum axial tension and compression deformation values correspond to uninterrupted and controlled damage cases. In this study, limit states due to axial deformations under axial compressive and bending load conditions, which mainly cause loss of pressure integrity and pipe damages, are investigated. For this purpose, corresponding D/t ratios and material properties are considered to characterize the existing pipelines in Turkey such as, Kullar water transmission, Trans-Anatolian-Natural Gas (TANAP) and Baku-Tbilisi-Ceyhan Crude Oil (BTC) pipelines by using three-dimensional finite element model under combined loading conditions. In this way, limit states due to displacements and rotation demands are specified. The results of this study are expected to be used in the performance-based design of steel pipes in Turkey. [ABSTRACT FROM AUTHOR]