Load-Transfer Efficiencies of Rigid Airfield Pavement Joints Based on Stresses and Deflections

Wadkar, Ashish; Mehta, Yusuf; Cleary, Douglas; Guo, Edward; Musumeci, Laura; Zapata, Alejandro Uribe; Kettleson, William

doi:10.1061/(asce)mt.1943-5533.0000288

Cited by 24 publications

(24 citation statements)

References 9 publications

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“…In the case of the laboratory results, LTE is always above 90%. Hence, it is obvious that the LTE of short slabs with high-quality aggregates are above 70%, which is accepted as a good LTE value for the in-service life of concrete pavements (Bordelon, Roesler, & Hiller, 2009;Wadkar, Mehta, Cleary, Guo, Musumeci, Zapata, & Kettleson, 2011). Therefore, effectively, dowels bars are unnecessary.…”

Section: Safety Factormentioning

confidence: 99%

Laboratory Characterization of The Load Transfer-Crack Width Relation for Innovative Short Concrete Slabs Pavements

Pradena

Houben

César

2020

BJRBE

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Aggregate interlock is the dominant load transfer mechanism in non-dowelled Jointed Plain Concrete Pavements, as the innovative short concrete slabs. Although the Load Transfer Efficiency of this pavement innovation is based on that mechanism, the structural design methods do not relate the Load Transfer Efficiency by aggregate interlock with its direct cause, which is the Crack Width under the joints. The objective of the present article is to characterise in the laboratory the Load Transfer Efficiency−Crack Width relation for innovative short slabs Jointed Plain Concrete Pavements. Additionally, as an alternative to large-scale laboratory tests to study the Load Transfer Efficiency, a practical test on a reduced scale is proposed. The results confirmed that short slabs Jointed Plain Concrete Pavements with high-quality aggregates are able to provide adequate Load Transfer Efficiency (above 70%) without dowels bars. Based on the laboratory results, complemented with previous field data, a Load Transfer Efficiency−Crack Width curve is proposed and made available for structural design methods of short slabs Jointed Plain Concrete Pavements. Finally, the laboratory test on a reduced scale is useful to develop specific Load Transfer Efficiency−Crack Width relations using standard equipment available in traditional concrete laboratories.

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Section: Safety Factormentioning

confidence: 99%

Laboratory Characterization of The Load Transfer-Crack Width Relation for Innovative Short Concrete Slabs Pavements

Pradena

Houben

César

2020

BJRBE

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“…Therefore, stress-based load-transfer efficiency is often considered an appropriate way to quantify LTE. Strain gauge data from full-scale tests collected by the federal aviation administration were analyzed by Wadkar et.al, 2011 [14] to compute the stress-based LTE of joints under moving loads. The effect of static aircraft gear loads and slab size on the LTE of joints was analyzed by using a twodimensional finite-element program JSLAB.…”

Section: Literature Reviewmentioning

confidence: 99%

Modeling of Dowel Jointed Rigid Airfield Pavement under Thermal Gradients and Dynamic Loads

2016

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Concrete pavements have been widely used for constructing runways, taxiways, and apron areas at airports. The aviation industry has responded to increased demand for air travel by developing longer, wider, and heavier aircraft with increasing numbers of wheels to support the aircraft while in ground operation. Many researchers developed their models based on the finite element method (FEM) for the analysis of jointed concrete pavement. Despite the notable improvement, important considerations were overlooked. These simplifications may affect the results of the developed models and make them unrealistic. Sensitivity studies were conducted in this study to investigate the effect of the loading parameters on the load transfer efficiency (LTE) indictors where concept of LTE is fundamental in airfield design procedures. The effect of main gear loading magnitudes in different wheel configurations combined with positive and negative thermal gradients was investigated. The verification process was presented to increases the confidence in the model results. Understanding the response of rigid airfield pavement under such circumstances is important developing a new pavement design procedure, as well as implementing a suitable remedial measure for existing pavements. The results obtained that utilizing a dynamic load allows studying the fatigue cycles that pavement can be subjected under different wheel configurations. Moreover, the change in the thermal gradient from positive to negative significantly changed the slab curvature shape.

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“…Load transfer can vary with concrete pavement temperature, age, moisture content, construction quality, magnitude and repetition of load, and type of joint (5). A recently completed study indicates that the dynamic stress-based load transfer efficiency [LTE (S)] under a moving aircraft gear can be significantly higher than 25% (6). Analysis of full-scale test data from NAPTF indicates that LTE (S) under moving loads for the MRC section of CC2 test pavement joints is within a range of 0.3 to 0.5 (7).…”

Section: Problem Statementmentioning

confidence: 99%

Effect of Pavement Damping and Aircraft Speed on Stress-Based Load Transfer Efficiency

Joshi

Mehta

Cleary

2012

Transportation Research Record: Journal of the Transportation R

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This paper documents a study of the dynamic mechanical responses of rigid pavement at the joint under moving aircraft loads. The MRC (pavement constructed on conventional base) section of Construction Cycle 2 test pavement at FAA's National Airport Pavement Test Facility was modeled with the three-dimensional finite element program ABAQUS. The model was calibrated by determining pavement damping parameters and joint stiffness values on the basis of heavy weight deflectometer data and strain profiles captured from dynamic sensors installed within the pavement at various locations. The effect of moving aircraft under varying speeds on tensile strains at the bottom of the portland cement concrete at the joint (εcritical) and dynamic stress-based load transfer efficiency [LTE (S)] at the joint is studied with three-dimensional finite element analysis. A decrease in εcritical at the joint with increasing speed was observed. The dynamic LTE (S) at the joint was enhanced at higher speeds. Sensitivity of dynamic LTE (S) at the joint to pavement damping was also studied with the finite element model. The dynamic LTE (S) at the joint increased with pavement damping. Finally, the effect of aircraft load and wheel configuration on dynamic LTE (S) was studied. Dynamic LTE (S) was sensitive to aircraft wheel configuration; however, it was insensitive to the magnitude of load.

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Load-Transfer Efficiencies of Rigid Airfield Pavement Joints Based on Stresses and Deflections

Cited by 24 publications

References 9 publications

Laboratory Characterization of The Load Transfer-Crack Width Relation for Innovative Short Concrete Slabs Pavements

Laboratory Characterization of The Load Transfer-Crack Width Relation for Innovative Short Concrete Slabs Pavements

Modeling of Dowel Jointed Rigid Airfield Pavement under Thermal Gradients and Dynamic Loads

Effect of Pavement Damping and Aircraft Speed on Stress-Based Load Transfer Efficiency

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