Abstract
The paper investigates how significantly the errors in deflections and analysis model affect backcalculated layer moduli. The Monte Carlo simulation and sensitivity analysis are utilized for this purpose. It is found that as number of repeated measurement increases and as number of measuring points increases, the effect of error in deflection reading decreases, but that of analysis model error remains same. Furthermore by using the sensitivity analysis, confidence regions of backcalculation moduli, radial and vertical strains are derived. This will serve as a useful tool for reliability analysis of pavement structure from FWD test.
