Backcalculation Flowchart Measure of Convergence In some backcalculation programs, a range (minimum and maximum) of moduli are selected or calculated to prevent program convergence to unreasonable moduli levels (either high or low).įigure 1. Various methods have been employed within the various backcalculation programs to converge on a set of layer moduli which produces an acceptable error between the measured and calculated deflection basins. There are various error measures which can be used to make such comparisons (more on this in a subsequent paragraph in this section). The modulus of the structural layers and subgrade was backcalculated from the FWD data using the MODULUS 6.0 program. This element simply compares the measured and calculated basins. Layered elastic computer programs are generally used to calculate a deflection basin. These moduli are usually estimated from user experience or various equations. The seed moduli are the initial moduli used in the computer program to calculate surface deflections. Analyzed dynamic sensor reponses (pressure cells, strain. Includes all layer thicknesses and load levels for a specific test location. Conducted backcalculation of layer moduli for flexible and rigid pavement sections using MODULUS 6.0, ELMOD6, and BAKFAA software.
Substantial improvements have been made to the programs, data editing, and segmentation routines. The basic features of the DOS MODULUS 5.1 system have been transferred to Windows.
#Backcalculation modulus 6.0 manual
Includes the measured pavement surface deflections and associated distances from the load. This report provides a users manual for the new Windows version of MODULUS 6.0.
0 kommentar(er)
