Comparisons of Two Typical Specialized Finite Element Programs for Mechanical Analysis of Cement Concrete Pavement

Gu, Hanyan; Jiang, Xin; Li, Zhenkun; Yao, Kang; Qiu, Yanjun

doi:10.1155/2019/9178626

Cited by 10 publications

(18 citation statements)

References 20 publications

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“…Many general-purpose finite element packages have attracted the attention of engineers, such as ABAQUS and ANSYS [ 18 , 19 , 20 , 21 , 22 ]. Besides this, a series of sub-processors were developed in order to satisfy special purpose, such as KENSLABS [ 23 ], EverFE [ 24 ] and ISLAB2000 [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Simulation and Multi-Factor Stress Prediction Model for Cement Concrete Pavement Considering Void under Slab

Liu

Zhou

et al. 2020

Materials

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Uneven support as result of voids beneath concrete slabs can lead to high tensile stresses at the corner of the slab and eventually cause many forms of damage, such as cracking or faulting. Three-dimensional (3D) finite element models of the concrete pavement with void are presented. Mesh convergence analysis was used to determine the element type and mesh size in the model. The accuracy of the model is verified by comparing with the calculation results of the code design standards in China. The reliability of the model is verified by field measurement. The analysis shows that the stresses are more affected at the corner of the slab than at the edge. Impact of void size and void depth at the slab corner on the slab stress are similar, which result in the change of the position of the maximum tensile stress. The maximum tensile stresses do not increase with the increase in the void size for relatively small void size. The maximum tensile stress increases rapidly with the enlargement in the void size when the size is ≥0.4 m. The increments of maximum tensile stress can reach 183.7% when the void size is 1.0 m. The increase in slab thickness can effectively reduce maximum tensile stress. A function is established to calculate the maximum tensile stress of the concrete slab. The function takes into account the void size, the slab thickness and the vehicle load. The reliability of the function was verified by comparing the error between the calculated and simulated results.

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Section: Introductionmentioning

confidence: 99%

Finite Element Simulation and Multi-Factor Stress Prediction Model for Cement Concrete Pavement Considering Void under Slab

Liu

Zhou

et al. 2020

Materials

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“…Nevertheless, the FEA model can be difficult to generate effectively and extract results of interest. Many special-purpose software packages were developed for concrete pavement to reduce the difficulty of model analysis, such as KENSLABS [25], EverFE [26], and ISLAB2000 [27]. On the other hand, the limitations of these software are generated due to their specific settings.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Concrete Pavement considering Void beneath Slabs and Joints LTE

Liu

Zhou

et al. 2020

Advances in Civil Engineering

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Dowel bars are arranged between two slabs of jointed plain concrete pavements to transfer load between them. The looseness of these dowel bars leads to the decrease of the load transfer efficiency (LTE). Meanwhile, repeated vehicle load can result in void near the joints. In this paper, the behaviors of concrete pavement under the effect of void size and joint stiffness were studied by using ABAQUS software. The FEA model was calibrated for different element parameters based on mesh convergence analysis and validated by comparison with previous studies. The voids beneath slabs were considered in this study, including the loaded slab and unloaded slab. The different effects of base course modulus on the stress of loaded slab are also analysed. It is concluded that the results show that the void size and joint stiffness affect the stress of the loaded plate. Smaller void size and larger joint stiffness will lead to the maximum stress located at the bottom of the loaded slab, and the void size has little effect on the stress of the loaded slab. Otherwise, the larger void size will cause larger stress. The effect of base modulus on stress is similar.

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“…El crecimiento acelerado de las ciudades demanda una mayor infraestructura de transporte y con ello una mejora de la red vial existente [1], [2]. Los pavimentos rígidos cumplen un importante rol en nuestra infraestructura vial, permitiendo dar respuesta a dicha demanda creciente [3]. Este tipo de pavimentos tiene ventajas en comparación con el pavimento bituminoso o asfáltico, como es su alta rigidez, alta resistencia y buena durabilidad [4].…”

Section: Introductionunclassified

“…Estas posiciones corresponden a la carga ubicada en el interior, borde y esquina de la losa [8], [11], [12]. Sin embargo, las soluciones analíticas tradicionales disponibles pueden no tener en cuenta de manera realista cargas complejas, condiciones de contorno mixtas o geometrías arbitrarias [3]. Las soluciones de forma cerrada propuestas por Westergaard se desarrollaron para estructuras de pavimento rígido simples y casos de carga simple [10], [13].…”

Section: Introductionunclassified

“…A partir del desarrollo de las computadoras, se han empleado muchos métodos numéricos diferentes para el análisis de la estructura del pavimento rígido en las últimas décadas, como es el caso del método de elementos finitos (FEM en inglés), el método de elementos discretos (DEM en inglés) [14], el método de elemento límite (BEM en inglés) [15] y el método de diferencia finita (FDM en inglés) [16]. Sin embargo, el método de elementos finitos es sin duda uno de los métodos principales debido a su flexibilidad y adaptabilidad [3]. Con el desarrollo de la mecánica computacional, el método de elementos finitos rompió las limitaciones que imponían las condiciones de borde y los tipos de carga en los métodos analíticos [9].…”

Section: Introductionunclassified

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Behavior analysis of maximum stresses induced in rigid pavements due to partial replacement of slabs

Guerra

2020

ITECKNE

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The objective of this study is to analyze the behavior of the maximum stresses induced in concrete slabs as a result of modifications in their geometry. This condition is due to maintenance operations that consider the partial replacement of paving slabs. The analysis is carried out by modeling finite elements of the pavement in sections that consider 2 transversal slabs and 3 longitudinal slabs. A square geometry, traditionally used in Chile, of 3,500 mm (length) x 3,500 mm (width) has been used as the base for each slab. The effect of partial replacement of the central slab by variable lengths in combination with variations in slab thickness of 150 mm, 160 mm, 180 mm and 200 mm has been studied for 3 types of subgrade. The models have been solved by means of finite element analysis and for this the EverFE 2.26 software has been used, which has been widely used for the study of rigid pavements. The maximum stresses induced by the most critical position of the load have been studied, which corresponds to the positioning of the single axle with dual tires on the edge of the slab. The results allow recommending a limit configuration in the partial replacement of slabs in order to control the maximum stresses induced and thereby avoid the reduction of their useful life. The determined increase in the stresses in the slab is between 3.63 and 7.61% and these values allow calculating by fatigue models, a decrease in the total number of load applications of 27% for slab thicknesses of 150mm (K=0.064 MPa/mm) and 14% for slabs of 200mm (K=0.064 MPa/mm) thickness, which is reflected in a reduction in its useful life.

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Comparisons of Two Typical Specialized Finite Element Programs for Mechanical Analysis of Cement Concrete Pavement

Cited by 10 publications

References 20 publications

Finite Element Simulation and Multi-Factor Stress Prediction Model for Cement Concrete Pavement Considering Void under Slab

Finite Element Simulation and Multi-Factor Stress Prediction Model for Cement Concrete Pavement Considering Void under Slab

Mechanical Behavior of Concrete Pavement considering Void beneath Slabs and Joints LTE

Behavior analysis of maximum stresses induced in rigid pavements due to partial replacement of slabs

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