Modulus 6 backcalculation
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ERES Consultantsm Inc., “ Nondestructive Structural Evaluation of Airfield Pavements,” Prepared for U.190, University of Illinois, Urbana, Illinois, U.S.A.
#MODULUS 6 BACKCALCULATION SERIES#
32, Illinois Cooperative Highway and Transportation Research Series No. “ Mechanistic Interpretation of Nondestruction Pavement Testing Deflection,” Civil Engineering Studies, Transportation Engineering Series No. T., Held in Austin, Texas, June 14-17, pp. H., “Modified Deflection Ratio Procedures for Backcalculation of Concrete Pavements,” Airport Facilities: Innovations for the Next Century Proceedings, 25 th International Air Transportation Conference, ASCE, Edited by McNerney, M. Dissertation, Chalmers University of Technology, Goteborg, Sweden (1960). “ Structurally Reinforced Concrete Pavements.,”D. Thesis, Tamkang University, Taipei, Taiwan (1994). “ Theoretical Investigation on Backcalculation of Pavement Layer Moduli from Surface Deflection Data,” M.S. “Calculation of the Elastic Moduli of a Two-Layer Pavement System from Measured Surface Deflection,” Highway Research Record 431, Highway Research Board, Washington, D.C., U.S.A. , “The Theory of Stresses and Displacements in Layered Systems and Applications to the Design of Airport Runways,” Proceedings, Highway Research Board, Vol. H., “Tabulated Values for Determining the Complete Pattern of Stresses, Strains and Deflections beneath a Uniform Circular Load on a Homogeneous Half Space,” Highway Research Board Bulletin 342, Washington, D.C., U.S.A. Second Edition, Pearson Prentice Hall, N.J., U.S.A.
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FHWA, “ Backcalculation of Layer Parameters for LTPP Test Sections- Slab on Elastic Solid and Slab on Dense-Liquid Foundation Analysis of Rigid Pavements,” Publication No.
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Keywords: Pavement, Backcalculation, Elastic Modulus, LTPP Subsequently, a revised regression model was proposed for future practical applications. In addition, it was also found that slab thickness did have significant effects on the relationship of the backcalculated subgrade elastic modulus and the backcalculated modulus of subgrade reaction. Relatively high variability between the relationships of the static and the dynamic moduli was observed indicating that further research study is needed to improve the current state-of-the-art backcalculation approach. The laboratory tested (or static) layer moduli were compared with the backcalculated (or dynamic) moduli using the Long-Term Pavement Performance (LTPP) database. The two-layer backcalculation approach proposed by the 1993 AASHTO Design Guide for the structural evaluation of existing pavements was also adopted. The main objective of this study was to investigate the fundamental principles of flexible and rigid pavement backcalculation methodologies and their potential limitations.