Abstract: The earthquake wave broadcasting through the ground leads a ground dissemination when the earthquake happen， then the ground moves along the pipe axial displacement makes the axial tensile stress．Neglect inertial force，but considering dynamic water pressure．Adoption the statical analysis method to analysis ascending pipe stress，and incorporation a calculation
example using Ansys software to analyze submarine pipeline axial stress．The example was analysis and got the conclusion was that the submarine pipeline could not be broke where ９ degrees earthquake intensity happened.

Key words: Earthquake wave , Dynamic water pressure , Submarine pipeline , Axial stress

摘要： 地震时地震波沿地面传播引起地面位移,地面沿直管轴向位移时使管道产生轴向拉伸应力。忽略惯性力,但考虑动水压力,采用静力分析的方法对直管进行应力分析,并结合计算实例,应用Ansys软件对海底管道进行轴向应力分析,得出结论为当地震裂度小于9度时管道不会发生断裂。

关键词: 地震波 , 动水压力 , 海底管道 , 轴向应力