| Title |
Proposed Seismic Design Guideline for Buried Gas Pipelines Considering Energy Supply Continuity |
| Authors |
이재흔(Lee, Jae Heun);윤혜진(Yoon, HyeJin);이상호(Lee, Sangbo);조정래(Cho, Jeong-Rae) |
| DOI |
https://doi.org/10.12652/Ksce.2025.45.6.0631 |
| Keywords |
매설 가스배관; 내진설계; 운영지속성; 지반-배관 상호작용 Buried gas pipeline; Seismic design; Operational continuity; Soil-pipeline interaction |
| Abstract |
The increasing use of renewable energy has led to greater demand for transporting alternative fuels such as hydrogen, ammonia, and biogas through buried pipelines. Ensuring the seismic integrity and functionality of these pipelines is essential for maintaining stable energy supply systems. This study proposes a seismic design guideline for buried gas pipelines that takes into account operational continuity requirements under seismic conditions. The guideline consists of three main parts: determination of the design earthquake, evaluation of design limit states, and estimation of seismic load effects. The design earthquake is defined by assigning seismic importance levels according to process classification, ensuring consistent design throughout the pipeline network. The design limit state is expressed in terms of axial strain considering pipeline failure modes. Seismic load effects are divided into wave propagation effects and permanent ground deformation effects. The former is evaluated through comparison between Rayleigh-wave-induced ground strain and pipeline axial frictional strain, while the latter is analyzed using nonlinear finite element models incorporating soil-pipeline
interaction. An example design case is presented to demonstrate the applicability and reliability of the proposed guideline. |