Numerical modeling of railway track supporting system using finite-infinite and thin layer elements
The present contribution deals with the numerical modeling of railway track-supporting systems-using coupled finite-infinite elements-to represent the near and distant field stress distribution, and also employing a thin layer interface element to account for the interfacial behavior between sleeper...
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| Main Authors: | , , , , |
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| Format: | Article |
| Published: |
Materials and Energy Research Center
2009
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| Online Access: | http://psasir.upm.edu.my/id/eprint/15859/ http://www.ije.ir/abstract/%7BVolume:22-Transactions:A-Number:2%7D/ |
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| Summary: | The present contribution deals with the numerical modeling of railway track-supporting systems-using coupled finite-infinite elements-to represent the near and distant field stress distribution, and also employing a thin layer interface element to account for the interfacial behavior between sleepers and ballast. To simulate the relative debonding, slipping and crushing at the contact area between sleepers and ballast, a modified Mohr-Coulomb criterion was adopted. Further more an attempt was made to consider the elasto plastic materials’ non-linearity of the railway track supporting media by employing different constitutive models to represent steel, concrete and other supporting materials. It is seen that during an incremental-iterative mode of load application, the yielding initially started from the edge of the sleepers and then flowed vertically downwards and spread towards the center of the railway supporting system. |
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