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A platform for research: civil engineering, architecture and urbanism
Determination of Nonlinear Parameters of Flexible Pavement Layers From Nondestructive Testing
Nondestructive testing (NDT) methods are typically used to measure the variations in the modulus of different pavement layers. Critical strains necessary for the estimation of the remaining life of a pavement system are then determined from the estimated moduli. The Falling Weight Deflectometer (FWD) and the Seismic Pavement Analyzer (SPA) are two of the NDT devices used for this purpose. The major objective of this study is to develop and algorithm for predicting the design modulus of each layer given the seismic modulus and the nonlinear parameters of each pavement layer. The feasibility of backcalculating the nonlinear parameters of the base and subgrade given the seismic modulus of each layer and the deflection basin measured at the same location are investigated in this document. An algorithm has been developed for this purpose. In the algorithm, a material model that relates the design modulus with seismic modulus was selected. A so-called equivalent linear structural model was also adapted. An optimization algorithm was developed to derive the nonlinear parameters of pavement materials from the FWD deflections and seismic moduli.
Determination of Nonlinear Parameters of Flexible Pavement Layers From Nondestructive Testing
Nondestructive testing (NDT) methods are typically used to measure the variations in the modulus of different pavement layers. Critical strains necessary for the estimation of the remaining life of a pavement system are then determined from the estimated moduli. The Falling Weight Deflectometer (FWD) and the Seismic Pavement Analyzer (SPA) are two of the NDT devices used for this purpose. The major objective of this study is to develop and algorithm for predicting the design modulus of each layer given the seismic modulus and the nonlinear parameters of each pavement layer. The feasibility of backcalculating the nonlinear parameters of the base and subgrade given the seismic modulus of each layer and the deflection basin measured at the same location are investigated in this document. An algorithm has been developed for this purpose. In the algorithm, a material model that relates the design modulus with seismic modulus was selected. A so-called equivalent linear structural model was also adapted. An optimization algorithm was developed to derive the nonlinear parameters of pavement materials from the FWD deflections and seismic moduli.
Determination of Nonlinear Parameters of Flexible Pavement Layers From Nondestructive Testing
A. Meshkani (author) / I. Abdallah (author) / S. Nazarian (author)
2004
134 pages
Report
No indication
English
Highway Engineering , Construction Equipment, Materials, & Supplies , Nondestructive Testing , Flexible pavements , Nondestructive tests , Nonlinear systems , Structural analysis , Pavement deflections , Parameters , Design , Algorithms , Road materials , Elastic moduli , Concrete , Falling Weight Deflectometer(FWD) , Seismic Pavement Analyzer(SPA)
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