大規模数値計算を用いたガス導管の耐震性評価手法の提案

穴太 聖哉; 三津谷 維基; 小林 実央; 末冨 岩雄; 藤田 航平; 市村 強; 堀 宗朗

doi:10.2208/jscejj.23-15046

Abstract

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.

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