Akademik Veri Yönetim Sistemi
10th Turkish Conference on Earthquake Engineering, 10TCEE 2025, İstanbul, Türkiye, 8 - 10 Ekim 2025, cilt.843 LNCE, ss.263-277, (Tam Metin Bildiri)
Pipelines embedded in liquefiable soil may experience an uplift under seismic loading. Despite advancements in numerical analysis methods and physical modeling, gaps remain in the literature and design guidelines regarding the evaluation of uplift in buried pipelines within liquefiable soils. In many studies in the literature, cross-sectional effects on structures are determined using 2D pseudo-static analyses. In this paper, the movement of a pipe in liquefiable soil under dynamic loads and its stability against the uplift effects that occur during liquefaction are investigated using numerical analyses. The numerical analyses were carried out using the commercial software package Plaxis 2D and the PM4Sand constitutive model. The analysis computed the horizontal and vertical displacements of the pipe, internal forces, and safety factors, indicating the stability against uplift pressures during liquefaction. Considering that these analyses require advanced constitutive relationships and are time-consuming, and that 2D dynamic software is not widely available, 2D pseudo-static analyses were also conducted to examine the convergence of this calculation approach. Considering the undrained behavior of the sand layer during an earthquake, stability analyses were performed using pore water pressures and stresses derived from 2D dynamic and pseudo-static numerical analyses. Safety factors against pipeline uplift were then calculated.