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Double Beam Model for Reinforced Tensionless Foundations under Moving Loads

  • Geotechnical Engineering
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Abstract

An attempt is made herein to analyse the rails resting on earth beds with geocell inclusion under a moving load. Reinforced soil system is assumed to react to compressive forces only, i.e., the tensionless foundation. It comprises of a granular fill layer (modelled as Pasternak shear layer) followed by a geocell inclusion (represented by an infinite beam with finite bending stiffness) overlying the foundation soil (modelled as a series of spring and dashpot connected in parallel). The governing differential equations are developed and converted for general use in non-dimensional form. These equations are solved using suitable boundary conditions and employing Finite Difference Scheme along with iterative Gauss-Seidel technique. Critical velocity of tensionless system is determined and compared with perfect contact case. The parametric study conducted shows the influence of applied load, relative compressibility of soils, relative flexural rigidity, depth of placement of geocell, damping in the system and velocity of load on the response of rail and geocell reinforcement. Also, a sensitivity study is carried out which suggests that uplift of the rail is quite sensitive to more number of parameters than to its downward deflection.

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  1. Dept. of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India

    Shashank Bhatra & Priti Maheshwari

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  1. Shashank Bhatra
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  2. Priti Maheshwari
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Correspondence to Priti Maheshwari.

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Bhatra, S., Maheshwari, P. Double Beam Model for Reinforced Tensionless Foundations under Moving Loads. KSCE J Civ Eng 23, 1600–1609 (2019). https://doi.org/10.1007/s12205-019-1609-6

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  • DOI: https://doi.org/10.1007/s12205-019-1609-6

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