关键词: 场地, 断层, 埋地管道, 管-土摩擦, 有限元, 建模

Abstract: Site condition and fault movement are the main reasons of buried pipeline’s damage. It is the main problem of earthquake lifeline engineering to avoid the damage of buried pipelines affected by site condition and faults under earthquake load. By the parasolid modeling in ADINA, through the definition of site body and Boolean operation, the geometry model is established for the analysis of buried pipeline damage, and finite element modeling of soil-fault-pipe is worked out. With model preferences, parameters of the model are defined, such as the characteristics of rock and soil, characteristics of pipeline. Pipe-soil friction and fixity are applied, and loads of earthquake wave and fault displacement are defined. According to the calculating results, influence of some parameters on the damage of buried pipeline under earthquake load are investigated, such as buried depth, parameters of faults, and pipe-soil friction. The deeper of burying and the bigger of fault throw, the easier of pipe deformation and damage. Optimum volume of pipe-soil friction coefficient and cut angle between fault and pipeline are obtained. Finally, some advices are proposed for the protection of buried pipelines in engineering.

Key words: site, fault, buried pipeline, pipe-soil friction, finite elements, modeling