无固定墩钢质管道冲沟状态下动荷载失效长度数值分析

摘要

A mechanical model of buried pipeline without frusta is established under the research of being gulch. A finite cell model of buried pipeline is built by using ANSYS finite cell analysis program. The seismic response of the finite cell model under the action of siesmic waves are simulated in different earthquake intensity, and its stress and distortion under dynamic load of gulch are given, then the length of pipeline failure is given. The important foundation for the earthquake is provided by the simulated results.%通过对无固定墩钢质管道在地质灾害冲沟发生时管道失效过程的研究,建立了描述这一破坏过程的力学模型;再利用ANSYS有限元分析软件,建立了埋地管道有限元数值分析模型.通过输入地震波,对不同地震烈度下的地震响应进行了有限元数值仿真计算,得到了在不同地震动荷载作用下管道的最大应力和位移情况,给出了管道动载失效长度,为管道的抗震设计提供理论依据.