Abstract
In the present work, analysis of concrete pavements using ANSYS software has been attempted. ANSYS is a finite element method-based software. The concrete slab has been modeled with solid 45 brick element and spring elements for soil. Analysis was carried out for a wide range of load and slab soil combination. The soil as “Winkler type” represented by elastic springs and their stiffness was derived from modulus of sub-grade reaction. The influence of any particular base or sub base on edge stresses was not studied here. The model will be then subjected to number of varying input parameters like the change in the thickness of pavement slab, sub-grade material to winkler foundation, modulus of elasticity by adding metal chips in different percentage like 10%, 20%, 30% and also intensity of loads. It is aimed to compare the stresses of the model study with classical approach of Westergaards and IRC 58- 2002 method. Westergaards equation under estimate edge wheel load stresses when compared with those obtained from ANSYS. For generating the charts, edge loading condition was considered which is critical case for wheel load stresses. Also, it was aimed to compare the results with those given by IRC 58 – 2002 design charts. Design charts were developed in thesis work yield the same value of pavement thickness as that of IRC 58 – 2002 method.
Highlights
Finite element analysis (FEA) was first developed in by R. courant, who utilized the Ritz method of numerical analysis and variation calculus to obtain approximate solutions to vibration systems
Shunanfa Chen et al [10], Have done the finite elements stress analysis of concrete pavement wit sub-base voids, cracks at the corners and along the edges of concrete slabs appear frequently on Portland cement concrete pavement this study analyzes the relationship between the loss of support underneath pavement slabs and the premature failures of pavement slabs
Based on the result of the research work, following conclusions were drawn: The pavement slab has been analysed for different axle loads and sub-grade using finite element method
Summary
Finite element analysis (FEA) was first developed in by R. courant, who utilized the Ritz method of numerical analysis and variation calculus to obtain approximate solutions to vibration systems. The finite elements method is a numerical procedure that can be applied to be Obtain approximate solutions to a variety of problems in engineering. FEA systems have powerful graphics, capabilities, automated functionality, and advanced user interfaces that make the technology considerably, faster and easier to use These improvements not with standing, full-blown advanced FEA still requires considerable time and the expertise of a dedicated analyst with the knowledge necessary to apply proper mesh densities, element type, and boundary conditions. These expert analyst must know how to go about translating cad geometry into proper format for building the FEA model as well as correctly interpreting plots and other output information in the current research work, the model has been generated and engineering analysis was carried out using the commercially available package ANSYS.
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