Simplified approach for the evaluation of critical stresses in concrete pavement

Vishwakarma, Rameshwar J.; Ingle, R.K.

doi:10.12989/sem.2017.61.3.389

Cited by 13 publications

(3 citation statements)

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“…In addition, pavement design guidelines [21,32] recommend that the thicknesses of concrete slab should not be less than 20 cm and the L/W ratios of slab should be 1∼1.25. Vishwakarma and Ingle presented that most of the concrete pavements have a thickness below 35 cm [33]. ey have also concluded that the critical stresses of the concrete slab for L/W ratio 1.25 or below are almost the same [20].…”

Section: Fe Model Calculationmentioning

confidence: 94%

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Optimization of Structure Parameters of Airfield Jointed Concrete Pavements under Temperature Gradient and Aircraft Loads

Zhang

Mei

et al. 2019

Advances in Materials Science and Engineering

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Daily changing temperature causes significant thermal stress in concrete pavement. Tensile stress obtained can exceed flexural tensile strength when the concrete slabs are subjected to large temperature gradient and traffic loads, resulting in pavement damages. In this paper, maximum tensile stresses in concrete slabs with different slab sizes, thicknesses, and length to width (L/W) ratios were investigated by using the finite element (FE) method. The important parameters in the design of concrete pavement are the flexural tensile strength and the fatigue limit. By analyzing the comparison results between the maximum tensile stress and the fatigue limit, the optimum slab size and the critical thickness were determined. The results indicate that the maximum tensile stress obtained is higher for larger slab size with thin thickness. Furthermore, to reduce cutting work and the amount of dowel bars, the optimum slab sizes of the regional airport concrete pavement are recommended as 4 m × 4 m to 6 m × 6 m. The critical thicknesses of 4 m × 4 m slab and 6 m × 6 m slab are determined as 28.2 cm and 34.7 cm, respectively, based on the most unfavorable coupling between positive and negative temperature gradients and the Boeing 737–800 aircraft load. Moreover, the maximum tensile stress increases as the L/W ratio increases. When the slab length is less than 6 m, it is better to use square slab in airport jointed concrete pavement (JCP).

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Section: Fe Model Calculationmentioning

confidence: 94%

“…is is because the maximum tensile stress is related to the bending sti ness of the concrete slab. An increase in the bending sti ness decreases the maximum tensile stress [20,33]. Moreover, the bending sti ness of the concrete slab is proportional to the third power of the slab thickness.…”

Section: Optimization Analysis Of Slabmentioning

confidence: 99%

Optimization of Structure Parameters of Airfield Jointed Concrete Pavements under Temperature Gradient and Aircraft Loads

Zhang

Mei

et al. 2019

Advances in Materials Science and Engineering

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“…Column and pad of the footing were modeled as area (shell) elements, having six degrees of freedom at each node, as specified by Vishwakarma and Ingle (2017) for modeling a concrete slab. Load transferred from the column was treated as a concentrated load.…”

Section: Concept Of Modelingmentioning

confidence: 99%

Numerical method for analysis and design of isolated square footing under concentric loading

Magade

Ingle

2018

Int J Adv Struct Eng

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Footing is an important part of a structure, because its repair is extremely difficult and cumbersome. Therefore, all structural parameters should be carefully considered when designing a footing. An isolated footing needs sufficient depth, when considering the fixed base assumption. Extensive research has previously been conducted to define and formalize the depth of a rigid footing, i.e., the depth required, such that footing behaves as a rigid. Alternatively, working stress method (WSM) and limit state method (LSM) provide a lower depth for low subgrades and a higher depth for high subgrades than that required by rigid condition if a unit width footing is considered for the design. This paper presents a simple approach for calculating the depth to meet the rigid condition under static loading. The proposed calculation method produced a better rigidity than the existing approaches and it correlated well to the finite-element method (FEM) for low subgrades. The reinforcement distribution is function of the bending moment (BM). Steel is uniformly embedded throughout the length or width of conventional footing methods, but this is inappropriate, because the bending moment is not uniform along the length or width of the footing. This paper proposes solutions to this by redefining the placement of steel in the central zone of the footing. The effective zone for reinforcement was based on the FEM results. This simple procedure was developed for calculating the maximum moment using the Diagonal Strip Method (DSM). DSM is a substitute for FEM, and it has been shown to correlate well. The BM at central zone as well as at the edges can be calculated to define the spacing of the reinforcements.

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Analysis of Liquid Storage Concrete Containers Partially Restraint at the Base

Vishwakarma

Ingle

2022

Springer Proceedings in Energy

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Simplified approach for the evaluation of critical stresses in concrete pavement

Cited by 13 publications

References 0 publications

Optimization of Structure Parameters of Airfield Jointed Concrete Pavements under Temperature Gradient and Aircraft Loads

Optimization of Structure Parameters of Airfield Jointed Concrete Pavements under Temperature Gradient and Aircraft Loads

Numerical method for analysis and design of isolated square footing under concentric loading

Analysis of Liquid Storage Concrete Containers Partially Restraint at the Base

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