Improved seismic input and soil models and quasi-static approximation in buried pipes
Improved seismic input and soil models and quasi-static approximation in buried pipes
复制标题
改进的地震输入和土壤模型以及埋地管道中的准静态近似
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
T. Ariman
中科院分区：
文献类型：
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作者：
G. Muleski;T. Ariman
本文提出了地震作用下埋地管道的有限圆柱壳模型。周围的土壤被模拟为Winkler介质和一个更现实的地面运动输入的地震波被选择，而不是传统的正弦。分析适用于天然气管道的焊接钢。此外，准静态近似已被广泛接受的梁和集中质量模型的埋地管道进行了讨论。结果发现，准静态的方法显然会导致大的应力和应变值，以及一个更大的模型振幅，但在所有的刚体模式。
In this paper a model of a finite cylindrical shell for buried pipelines in a seismic environment is presented. Surrounding soil is modeled as a Winkler medium and a more realistic ground motion input for seismic waves is chosen instead of the customary sinusoidal one. The analysis is applied to natural gas pipelines made of welded steel. Moreover a quasi-static approximation which has found wide acceptance in the beam and lumped mass models of buried pipelines is then discussed. It is found that the quasi-static approach apparently leads to large stress and strains values as well as a larger model amplitude in all but the rigid body mode.