地震载荷作用下埋地管道强度的简化计算

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。对平面弯管，地面沿纵向管位移时对横向管有推压作用，从而在弯管内造成了平面弯矩。忽略惯性力，采用静力分析的方法对直管和弯管分别进行应力分析，并结合计算实例给出了埋地管道强度的简化计算方法。

Simplified Calculation Method for Strength of Buried Pipeline under the Seismic Load

When earthquake happens,the propagation of the seismic wave results in the displacement of the surface soil of the earth. As the surface soil moves towards the axial direction of the pipeline,the tensile stress in the pipeline is produced. The bending pipeline is composed of longitudinal pipe,transversal pipe and elbow. As the displacement of the surface soil occurs in the axial direction of longitudingal pipe,the transversal pipe is pused. This brings about bending movement in the elbow. At the end of this paper,under the condition of ignoring the inertia force,analysis of the stress for the pipeline and bending pipe are made respectively, and simplified calculation method for the strength of buried pipe is put forward in the field case.