New concepts for the assessment of concrete slab interfacial effects in pavement design and analysis

Bari, Muhammad Ehsanul; Zollinger, Dan G

doi:10.1080/10298436.2014.993183

Cited by 10 publications

(10 citation statements)

References 8 publications

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“…At present, design specifications of a cement concrete pavement adopt three kinds of theoretical models, namely, elastic foundation of a single slab, elastic foundation of a double slab, and composite slab models [1][2][3][4][5]. These parametric calculation models incorporate idealized material properties for concrete materials that are based on their performance under heavy loading traffic [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Response of Typical Cement Concrete Pavements under Impact Loading

Ding

Yan

Cai

et al. 2017

Mathematical Problems in Engineering

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In order to study the mechanical response of cement concrete pavements under impact loading, four types of typical cement concrete pavement structures are investigated experimentally and numerically under an impact load. Full-scale three-dimensional pavement slots are tested under an impact load and are monitored for the mechanical characteristics including the deflection of the pavement surface layer, the strain distribution at the bottom of the slab, and the plastic damage and cracking under the dynamic impact load. Numerical analysis is performed by developing a three-dimensional finite element model and by utilizing a cement concrete damage model. The results show that the calculation results based on the cement concrete damage model are in reasonable agreement with the experimental results based on the three-dimensional test slot experiment. The peak values of stress and strain as monitored by the sensors are analyzed and compared with the numerical results, indicating that the errors of numerical results from the proposed model are mostly within 10%. The rationality of the finite element model is verified, and the model is expected to be a suitable reference for the analysis and design of cement concrete pavements. The Full-Scale Loading Slot Experiment2.1. Impact Load Characteristics. In order to explore the dynamic response law of the concrete pavement structure under an impact load and over load, an impact load was designed as shown in Figure 1 and the load was applied to the pavement structure by a dynamic loading device. The acting Hindawi

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Section: Introductionmentioning

confidence: 99%

Mechanical Response of Typical Cement Concrete Pavements under Impact Loading

Ding

Yan

Cai

et al. 2017

Mathematical Problems in Engineering

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“…The lift-off in concrete slabs has been investigated by many researchers so far, by taking into consideration effects of curling and warping, together and separately (Westergaard, 1927;Tang et al, 1993;Bari & Zollinger, 2016;Jeong & Zollinger, 2006;Jeong et al, 2006;Bissonnette et al, 2007;Mohamed & Hansen, 1997;Rao & Roesler, 2005;Yu et al, 1998;Rao et al, 2001). A pioneering work has been done by Westergaard (1927) on the thermal stress field analysis in rigid slabs due to their curling.…”

Section: Slab Movementsmentioning

confidence: 99%

“…However, the net effects of curling and warping causes the lift-off in concrete slab pavements. In this regard, Bari and Zollinger (2016) proposed a new framework to model the effects of the concrete slab/subgrade interface for design purposes considering short-and long-term performance. They studied the effect of interfacial adhesion as well as the sliding friction on the interfacial resistance and the slab lift-off.…”

Section: Slab Movementsmentioning

confidence: 99%

Factors influencing stresses and movements in continuously reinforced concrete pavements – A review

Mirsayar¹,

Zollinger²

2018

10.5267/j.esm

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The use of cement concrete as a stronger and more durable material than asphalt concrete in construction of the pavements has been increased during the past decades. This review paper investigates the effect of various input variables for the design of continuously reinforced concrete pavements. A literature review is prepared based on the efforts performed by many researchers to investigate the effect of different factors including temperature change, shrinkage, material properties of the concrete, and concrete slab/ subbase bond properties on the displacements and stresses in the concrete slab. It is found that the important role of concrete slab/ subbase bond strength has not been investigated properly as compared to other input variables.

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“…The slab lift-off may be important in the early time of the placement because the fresh concrete may not have sufficient strength to resist fracture. The lift-off in concrete slabs has been investigated by many researchers who took into consideration effects of curling and warping, together and separately (1)(2)(3)(4)(5)(6)(7)(8)(9)(10). Pioneering work has been done by Westergaard on the thermal stress field analysis in rigid slabs caused by their curling (1).…”

mentioning

confidence: 99%

“…However, the net effect of curling and warping is lift-off in concrete slab pavements. In this regard, Bari and Zollinger proposed a new framework to model the effects of the concrete slab-subgrade interface for design purposes, considering both short-and long-term performance (3). They studied the effect of interfacial adhesion as well as the sliding friction on the interfacial resistance and the slab lift-off.…”

mentioning

confidence: 99%

New Approach to Determining Concrete Slab Lift-Off by Use of Interfacial Fracture Mechanics Concepts

Mirsayar

Huang

Zollinger

2016

Transportation Research Record

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Negative temperature gradient and the moisture gradient through the thickness of a concrete slab result in curling and warping of the slab edges to a concave configuration. The tendency of the slab pavement to separate from the subbase layer, called lift-off, is mainly controlled by such environmental effects and the weight of the slab itself. Because of such effects, cracks may propagate at the interface of the concrete slab and the subgrade. The induced stress and displacement fields around the interface crack tip are characterized by the stress intensity factors. The stress intensity factors can then be used in assessment of the cracked bond strength by employing any fracture criteria; therefore, it is necessary that the stress intensity factors be obtained. This paper proposes a new approach for determination of slab lift-off that uses concepts from interfacial fracture mechanics. A two-dimensional finite element analysis was performed to simulate lift-off in concrete slab pavements, and the effect of interface cracking on the mechanism of the lift-off was investigated. The relative stress intensity factors as well as the relative slab lift-off were determined for different crack lengths, loading conditions, and material properties of the slab and the subgrade. The presented model was validated with experiments. This paper discusses the remarkable effects of the material properties and the induced contraction stress on the slab lift-off. The findings presented provide researchers with some insight as to the effect of curing conditions and relative stiffness on slab lift-off and answer some of the primary questions regarding the mechanism of interfacial fracture in concrete slab–subgrade structures caused by the lift-off.

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New concepts for the assessment of concrete slab interfacial effects in pavement design and analysis

Cited by 10 publications

References 8 publications

Mechanical Response of Typical Cement Concrete Pavements under Impact Loading

Mechanical Response of Typical Cement Concrete Pavements under Impact Loading

Factors influencing stresses and movements in continuously reinforced concrete pavements – A review

New Approach to Determining Concrete Slab Lift-Off by Use of Interfacial Fracture Mechanics Concepts

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