Three dimensional vibration analysis of a buried pipeline with slip conditions |
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| Institution: | 1. Department of Mathematics and Computer Science, Allameh Tabatabai University, Tehran, Iran;2. Faculty of Engineering, University of Zanjan, P.O. Box 45195-313, Zanjan, Iran;1. Structural Engineering, Department of Civil Engineering, College of Engineering, Zanjan Branch, Islamic Azad University, Zanjan, Iran;2. Structural Engineering, Department of Civil Engineering, Semnan University, Semnan, Iran;3. Seismic Engineering, Department of Civil and Environmental Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran |
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| Abstract: | Based on the three-dimensional (3D) elasticity theories, an analytical solution for the infinite pipeline surrounded by the infinite soil medium subjected to an incident plane wave is derived. The Coulomb frictional force is applied at the pipeline–soil interface to represent the slip condition between the pipeline and the soil medium. This applied interface interaction can be considered as the viscous damping with some considerations. The normal and shear stress distributions along the cross-section of the pipeline are obtained by solving the obtained equations analytically. Furthermore, the superposition and the corresponding principles are used to obtain the von Misses strains. The critical and maximum amplitude ranges of the incident wave for which slipping and yielding, respectively, occur are estimated. The solutions are presented for ranges of soil densities and pipe thicknesses with perfect/imperfect bonds and different incident wave angles. |
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