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针对目前埋地管道地震应力简化计算公式中存在的问题,本文采用弹性地基梁法,以结构动力学理论和地震波动力学理论为基础,推导了地震行波有夹角入射地下管道的运动微分方程和管土间的位移传递系数,得出横波、纵波具有相同的位移传递系数,进而求得管道的最大应变及应力。最后通过采用不同方法及本文方法进行实例分析,认为本文方法与实际情况较符合。
Aiming at the problems existing in the simplified calculation formula of seismic stress in buried pipelines, this paper deduces the differential equation of motion of underground pipeline with seismic incidence angle by using the method of elastic foundation beam based on structural dynamics theory and seismic wave dynamics theory And the displacement transfer coefficient between the pipe and soil, it is concluded that the transverse and longitudinal waves have the same displacement transfer coefficient, and the maximum strain and stress of the pipe are obtained. Finally, by using different methods and examples in this paper, the author thinks the method in this paper is in line with the actual situation.