Highway Research Record

VI. RESEARCH WORK DONE IN ACADEMIC INSTITUTIONS RELATED TO THESIS WORK
B. PAVEMENT ENGINEERING AND PAVING MATERIALS
Finite Element Analysis of Concrete Pavement Considering Various Temperature, Load and Foundation Conditions

Date of Start:May 2004
Indian Institute of Technology, Kharagpur (S, I)

Scope and Objectives
(i) Analysis of combined effect of wheel load and temperature stresses in concrete pavement using finite element technique. (ii) To develop a user friendly computer program to determine the stresses produced by the wheel loads and linear      temperature variation and combined action of both.
(iii) Analysis of wheel load stresses in Monolithic pavement using finite element technique.
(iv) Determination of the stresses caused due to Non linear temperature distribution through the depth of slab .
(v) Analysis of concrete pavement considering solid elastic foundation.

Methodology
3D Finite Element Method was used to model the concrete pavement. A user- friendly computer program was developed to determine the stresses at different locations due to the effect of both wheel load and temperature variation.

Findings and Conclusions
(i) The linear or algebraic addition of wheel load stresses and thermal stresses is not valid for pavement design.
(ii) Nonlinear warping stresses must be considered in design. This will result in more accurate estimation of thickness of      pavements.
(iii) By effectively utilizing the combined action of concrete pavement and DLC into a unit mass, there will be reduction in      construction cost of concrete pavements.
(iv) The total wheel load and warping stress during the day time is higher than the algebraic addition of individual values
(v) The total wheel load and warping stress during the night time is lower than the algebraic addition of individual values
(vi) Combined stresses must be considered in the fatigue analysis of concrete pavements.