A Method For Estimating The Life Of Rigid Airfield Pavements
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Author | : United States. Army. Corps of Engineers. Ohio River Division Laboratories |
Publisher | : |
Total Pages | : 66 |
Release | : 1962 |
Genre | : Pavements |
ISBN | : |
A method for estimating the life of rigid airfield pavements is presented which is applicable for any ty aircraft traffic on all types of rigid pavement including overlays. The basic concept of the method presented is that any rigid pavement will withstand a certain number of stress repetitions before it cracks. The number of stress repetitions is dependent upon the magnitude of stress which is in turn dependent upon such things as: magnitude of load, gear configuration, traffic distribution, pavement strength, and foundation. All are considered in the method presented; an example of the use of the method is shown as well as three classical examples considering special problems. (Author).
Author | : R. L. HUTCHINSON |
Publisher | : |
Total Pages | : 1 |
Release | : 1962 |
Genre | : |
ISBN | : |
A method for estimating the life of rigid airfield pavements is presented which is applicable for any ty aircraft traffic on all types of rigid pavement including overlays. The basic concept of the method presented is that any rigid pavement will withstand a certain number of stress repetitions before it cracks. The number of stress repetitions is dependent upon the magnitude of stress which is in turn dependent upon such things as: magnitude of load, gear configuration, traffic distribution, pavement strength, and foundation. All are considered in the method presented; an example of the use of the method is shown as well as three classical examples considering special problems. (Author).
Author | : United States. Army. Corps of Engineers |
Publisher | : |
Total Pages | : 38 |
Release | : 1960 |
Genre | : Pavements |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 36 |
Release | : 1980 |
Genre | : Pavements |
ISBN | : |
Author | : United States. Army. Corps of Engineers |
Publisher | : |
Total Pages | : 100 |
Release | : 1958 |
Genre | : Pavements, Concrete |
ISBN | : |
Author | : United States. Federal Aviation Administration |
Publisher | : |
Total Pages | : 204 |
Release | : 1978 |
Genre | : Runways (Aeronautics) |
ISBN | : |
Author | : United States. Army. Corps of Engineers |
Publisher | : |
Total Pages | : 98 |
Release | : 1959 |
Genre | : Pavements |
ISBN | : |
Author | : United States. Bureau of Yards and Docks |
Publisher | : |
Total Pages | : 192 |
Release | : 1963 |
Genre | : Pavements |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 264 |
Release | : 2004 |
Genre | : |
ISBN | : |
Determination of remaining life of rigid airfield pavement generally involves a combination of engineering judgment and results of discrete test applications on the pavement and subgrade. Fatigue of pavement is almost never directly observed when examining long-term pavement performance of airfields. Observation and detection of distress and response can assist in assessing the remaining pavement life of in-service rigid pavements. In this study, accelerated pavement testing (APT) was employed to assess the remaining life of Runway 16/34 at Fort Worth Meacham International Airport in Forth Worth, Texas. A traffic model was established using reported Federal Aviation Administration aircraft operations. The pavement response, including the impact of fatigue, was observed under super-accelerated pavement (SAP) testing with input from the established traffic model. Investigation of the pavement consisted of two phases. The first phase involved continuous deflection profiles of the entire runway using the Rolling Dynamic Deflectometer (RDD). From the runway deflection profiles, candidate test locations were selected and tested to determine potential test locations outside of the main runway, as operational constraints prohibited testing of the main runway. A comparison of deflection responses was made between Runway 16/34 and the candidate locations. Three test locations adjacent to Runway 16/34 were selected: Taxiway A6, the South Run-Up area, and the North Run-Up area. The second phase of this study consisted of evaluating the remaining life of the rigid airfield pavement using a reconfigured SAP testing application of the RDD, referred to as the Stationary Dynamic Deflectometer (SDD). Nearly 200,000 applications were applied to three independent test points (center, edge, and corner) at each selected test location. Deflection responses were measured and analyzed, resulting in two principal findings.
Author | : Yu T. Chou |
Publisher | : |
Total Pages | : 72 |
Release | : 1987 |
Genre | : Pavements, Flexible |
ISBN | : |
A procedure was developed to analyze layered elastic flexible pavement systems in terms of probability and reliability. A computer program RELIBSIA was prepared to carry out the computations. Rosenblueth method, instead of the conventional Taylor series expansion, us used to estimate the expected value and variance of the strains (dependent parameters) based on the input mean values of independent parameters, i.e., aircraft load, layer thicknesses, and material moduli. The relationships between the reliability level and the allowable strain repetition of the designed system which is established with results computed using RELIBISA provide a decision-making tool for engineers to design pavements at desired reliability level. The design can be optimized by selecting thicknesses of the bituminous concrete and the base layers so that the pavement is failed in fatigue cracking and subgrade failure at nearly the same traffic level and the same reliability level. The reliability-strain curves have steeper slopes with the bituminous concrete strain failure criterion than with the subgrade strain failure criterion, indicating that for flexible pavements designed using the Corps of Engineer's failure criteria, the design has a greater degree of uncertainty in preventing subgrade failure than fatigue cracking of the bituminous concrete surface corps. However, this may not be true in real cases because the bituminous concrete failure criteria are determined based on controlled laboratory test data which do not consider the uncertainties existing in the laboratory-to-field correlations.