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Analysis of rails on damped tensionless reinforced earth beds under moving loads


Authors: Maheshwari, P.
Key words: Railways, tensionless foundation, moving load, geosynthetic
Source: The International Journal of Geotechnical Engineering
Volume: 4
Issue: 1
Pages: 11
Date: 2010-01-01
DOI: 10.3328/IJGE.2010.04.01.127-137

Abstract
In this paper, an attempt has been made to model and analyze the rails, lying on reinforced earth beds, subjected to moving load considering the damping of the system. Earth beds have been assumed to react only under compression, i.e., act as tensionless foundation. Geosynthetic has been used to reinforce the poor earth beds and modeled as an elastic membrane. Governing differential equations for the rail-foundation system have been obtained and finite difference method has been adopted for solving these by means of Gauss-Siedel iterative scheme. A detailed parametric study has been conducted to study the effect of applied load, velocity of the load, relative compressibility of soil layers on the response of the rail-foundation system. The value of input parameters like applied load intensity, velocity of applied load, properties of soil subgrade etc. have been adopted as per the Indian railway conditions. It has been found that applied load intensity, velocity of moving load has a significant influence on the response of rails. Damping has not been found to have significant effect on the response due to tensionless nature of the foundation system.

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This paper was added to our catalog on Tuesday 24 August, 2010.

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