第五部門：応用数理問題―計算機科学から社会科学まで

[24001-06-05] Proposal of seismic design method for gas pipelines using large-scale numerical calculation (Proceedings of Symposium on Applied Mechanics)

*Seiya Anata¹, Masaki Mitsuya¹, Mio Kobayashi², Iwao Suetomi^4,3, Kohei Fujita⁴, Tsuyoshi Ichimura⁴, Muneo Hori⁵ (1. Tokyo Gas Co., Ltd., 2. Tokyo Gas Network Co., Ltd., 3. Eight-Japan Engineering Consultants Inc., 4. Tokyo University, 5. Japan Agency for Marine-Earth Science and Technology)

Keywords:Seismic response analysis, Large-scale numerical calculation, Gas pipline

We propose a detailed method for standardizing the seismic evaluation of gas pipelines. Firstly, a ground model is built based on the surveys, which is then converted into a FEM model to perform three-dimensional nonlinear seismic response analysis. Based on the analysis results, the behavior at the gas pipelines can be determined and the pipe strain can be analyzed through another analysis. With this method, it is possible to quantitatively evaluate the pipe strain caused by the assumed seismic motion in the area, which is useful for maintenance, management, and repair planning of the facility