A new form of modified iterative method for pavement structure modulus identification

In this paper, FWD(Falling Weight Deflectmeter) load stress distribution coefficient is used to calculate the modulus of pavement structure course as the initial value of modulus, the deflection value of the modulus of the derivative matrix is established. Based on the traditional iterative method, the initial value of the modulus being constantly modified to get modulus of pavement structure course, a new form of modified iterative method to identify the pavement elastic modulus is developed. It has been proved by practice that this method can converge to a solution quickly, accurately and stability. It may be an ideal tool to analyze measured deflection bowl data with FWD for highway manager department.