Abstract
The analysis of rigid pavements is a complex mission for many reasons. First, the loading conditions include the repetition of parts of the applied loads (cyclic loads), which produce fatigue in the pavement materials. Additionally, the climatic conditions reveal an important role in the performance of the pavement since the expansion or contraction induced by temperature differences may significantly change the supporting conditions of the pavement. There is an extra difficulty because the pavement structure is made of completely different materials, such as concrete, steel, and soil, with problems related to their interfaces like contact or friction. Because of the problem's difficulty, the finite element simulation is the best technique incorporated in the analysis of rigid pavements. The ABAQUS software was used to conduct the response of previously tested specimens under different loading conditions. Good agreement between the laboratory and finite element results was observed. The maximum differences between experimental and finite element outcomes in terms of ultimate loads and ultimate deflection for rigid pavements under monotonic loading are 6% and 8%, respectively, and 10% and 18% respectively for the repeated load.
Highlights
The behavior of the rigid pavement is growing, and the need for carrying more analysis for improving the properties of concrete becomes larger
The maximum differences between experimental and finite element outcomes in terms of ultimate loads and ultimate deflection for rigid pavements under monotonic loading are 6% and 8%, respectively
The finite element model and the plasticity damage material models used in the present research can almost accurately predict the behavior of fiber-reinforced concrete pavement with and without soil under monotonic and repeated loading schemes
Summary
The behavior of the rigid pavement is growing, and the need for carrying more analysis for improving the properties of concrete becomes larger. (Belletti and Cerioni, 2004) presented experimental and numerical studies on the response of slabs made with fiber-reinforced concrete resting on grade for industrial pavements. This is done by testing four FRC slabs with fibers having various volume fractions and aspect ratios in the laboratory. The finite element method uses to make numerical simulations based on nonlinear fracture mechanics This extension concerns using a more realistic law for modeling the stiffness and strength of FRC after cracking the concrete matrix. The main contribution of this study is to compare the model's stress results by using the method of finite elements with the classical approach of the method of Westergaard and IRC 58-2002 Compared to those obtained from ANSYS, Westergaard's equation under approximate edge wheel load stresses is validated. The outcomes showed that the concrete pavement's ability to withstand higher magnitudes of tensile stress and strain without deterioration increases as the steel fiber content increases due to the increase in tensile stress
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