埋地管线有限元建模方法研究

Research on methods for establishing FEM model of buried pipelines

本文回顾了埋地管线抗震分析的研究工作，阐明研究埋地管线建模方法的重要性。结合几种埋地管线有限元建模方法，逐一论述各自的特点及适用条件。在上述工作的基础上，提出了可用于分析管线节点壳型屈曲及模拟管线面内应力应变发展直至屈服破坏过程的管土相互作用分析模型。

The research history of seismic responses of buried pipelines is retrospected, and the importance to explore the modeling method for buried pipelines with FEM is emphasized. For several modeling methods, their characteristics and applicable conditions are separately illustrated. Based on the above work,the model of the interaction of pipelines with soil, which is not only applicable to analyse the buckling of buried pipelines, but also able to simulate the process from the development of stress and strain at the surface of pipes to the damage to the node of pipelines, is presented.