Page 130 - SAPEM-Chapter-10-2nd-edition-2014

South African Pavement Engineering Manual
Chapter 10: Pavement Design

Table 54. Functionality of the cncPAVE Software Package

Application Area Aspect/Functionality Comment
Design traffic Traffic data options Weigh-in-motion (WIM) axle load spectra are
estimation used. Typical default spectra are included if data
are not available.
Pavement load sensitivity From calculated pavement response under load
spectra and empirical performance prediction.
Design traffic estimation Calculated from the traffic input data.
Design investigation Input data Pavement layer characteristics and costs, traffic
loading data and environmental condition.
Data analysis options Sensitivity analysis using the “What if” facility.
Data import, export and reporting Summary report containing input and output
generated and exported via the “Write report”
facility.
Pavement analysis Analysis engine Equations developed from FE analysis,
and modelling Westergaard theory, AASHTO and South African
experience.
Analysis options Analyze the effect of variation in input data on the
outcome by using the “What if” facility.
Material data and damage models User defined material properties and calibration
coefficients to generate output distributions for
different damage types.
Structural capacity estimation Progressive distress, through a recursive
simulation scheme.
Simulation schemes Monte Carlo variability simulation Variability in material properties used to arrive at
the predicted percentage area failed with loading
or time.
Recursive damage model Available as part of the Monte Carlo simulation
procedure.
Riding quality deterioration Available, predicts IRI change over time.

Section 7: Structural Capacity Estimation: Concrete Pavements
Page 119