Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
MODULUS 4.0: Expansion and Validation of the MODULUS Backcalculation System
The report describes the Texas Transportation Institute's continuing efforts to upgrade the MODULUS backcalculation system. The new MODULUS 4.0 is evaluated with monthly deflection data collected on 10 experimental sites for which all the layer materials have been tested in the laboratory. Validation of the system is attempted by using pavement sections instrumented with Multidepth Deflectometers. By simultaneously monitoring surface and depth deflections it is possible to quantify the effectiveness of the backcalculation system. Results show that the linear elastic model used in MODULUS produces reasonable layer moduli for pavements with thick asphalt surfacing. However, errors may result in using the linear elastic approach on thin pavements. The use of a stress dependent model which includes dilation substantially improves the match of measured and computed depth deflections on thin pavements. Preliminary results from a finite element backcalculation system have also been included.
MODULUS 4.0: Expansion and Validation of the MODULUS Backcalculation System
The report describes the Texas Transportation Institute's continuing efforts to upgrade the MODULUS backcalculation system. The new MODULUS 4.0 is evaluated with monthly deflection data collected on 10 experimental sites for which all the layer materials have been tested in the laboratory. Validation of the system is attempted by using pavement sections instrumented with Multidepth Deflectometers. By simultaneously monitoring surface and depth deflections it is possible to quantify the effectiveness of the backcalculation system. Results show that the linear elastic model used in MODULUS produces reasonable layer moduli for pavements with thick asphalt surfacing. However, errors may result in using the linear elastic approach on thin pavements. The use of a stress dependent model which includes dilation substantially improves the match of measured and computed depth deflections on thin pavements. Preliminary results from a finite element backcalculation system have also been included.
MODULUS 4.0: Expansion and Validation of the MODULUS Backcalculation System
G. T. Rohde (Autor:in) / T. Scullion (Autor:in)
1990
146 pages
Report
Keine Angabe
Englisch
Highway Engineering , Soil & Rock Mechanics , Pavement deflections , Subgrades , Thickness measurement , Soil properties , Bituminous concretes , Nonlinear systems , Linear systems , Finite element method , Mathematical models , Profiles , Texas , Backcalculation , MODULUS 4.0 , Falling Weight Deflectometer
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