Structural capacity and to defect changes in the aggregates The deflection basins obtained from theįlexible pavement testing were analyzed using the ELMODīack calculated program in order to find the pavement Groups with aggregate base layer moduli thickness of 100,ġ50, and 200 mm. That were built in Bedford and Virginia, have been monitoredįor 5 years using FWD. Structural condition of nine flexible pavement test sections To be better indicators than deflection basin parameters.Īppea and Al-Qadi (2000) also have assessed FWD data for Pavement layer moduli condition can be estimated using Results showed that the base and subgrade Synthetic deflectionĭatabase was generated using FWD and a stress-dependent Method for assessing pavement layer condition as well asĮstimated the remaining life of flexible pavement using Kim and Park (2002) developed a mechanistic empirical Were developed for application in conjunction with theĬondition evaluation indicators that were estimated using on Nondestructive condition assessment criteria (2002a, b) also presented a new conditionĪssessment criterion for flexible pavement layers using FWDįrom field data. Strain were identified as pavement layers condition
Parameters (DBPs), effective layer moduli, and stresses and Relationship between FWD deflection and asphalt pavement
This is an openĪccess article under the CC BY-NC-ND license (). Journal homepage: j o u r n a l o f t r a f fi c a n d t r a n s p o r t a t i o n e n g i n e e r i n g ( e n g l i s h e d i t i o n ) 2 0 1 6 3 ( 5 ) : 4 2 7 e4 3 7Ģ095-7564/© 2016 Periodical Offices of Chang’an University. Peer review under responsibility of Periodical Offices of Chang’an University. Inertial effects were important in the pavement response (1986) evaluated the dynamic analyses dataįrom falling weight deflectometer by using a multi-degree ofįreedom elastodynamic analysis, which was based on aįourier solution synthesis for periodic loading elastic or Their implementations are very challenging because of theirĬomplexity and the large number of variable (Xu et al., 2002a, b). The dynamic loading effect or nonlinear material behavior.Īlthough few procedures do take account for these effects, Most of these proceduresĪnd guidances for FWD deflection do not take account either Procedures for FWD deflection analysis have been developed in This is an open access article under the CC BY-NC-ND license ( /licenses/by-nc-nd/4.0/).įWD testing has been an integral part of flexible pavement’sĬondition assessment for a decade. © 2016 Periodical Offices of Chang’an University. Results are reasonable but consideration should be taken to fix
However, some of the projects had some inconsistent with modulus values along Majority of the projects are accurate and consistent with measured and computed prediction. The variations of moduli of all layers along the length of sections for Moduli have been achieved, and algorithms for interpretation of the deflection basin haveīeen improved. Results showed that the dynamic analysis of falling weightĭeflectometer test and prediction for the strength of character of flexible pavement layer Collected data includes, in addition to FWD measurements, core dataĪnd pavement distress surveys. The FWD test results of flexible pavement in Western Australia to predict the pavement The main objective of this study is to analyze Thickness condition and temperature variation, affect the predicted pavement structuralĬapacity and back calculated layer modulus. The characteristics of pavement structure, including pavement layer Measured deflection basin has fulfilled the standard and is in concurrence with certain Predicted pavement layer moduli sometimes may not be accurate even if computed and Of pavements to predict the layer moduli using backcalculation process. Al-Qadi bĪ Department of Civil Engineering, Curtin University, Perth, WA 6845, Australiaī Illinois Center for Transportation, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USAįalling weight deflectometer (FWD) testing has been used to evaluate structural condition
Dynamic analysis of falling weight deflectometerĪinalem Nega a,*, Hamid Nikraz a, Imad L.