Calculation method of permanent deformation for asphalt pavement based on fiber bragg grating sensing technology

To spread application of fiber grating technology in road engineering, a full-scale road monitoring information-based permanent deformation calculation method for asphalt pavement was proposed to resolve the complex problems about monitoring and analysing internal structure strain and temperature of asphalt pavement.A modified Burgers visco-elasticity model was adopted,and a road monitoring system was assembled by multi-types of fiber Bragg grating(FBG)sensors. And such parameters as peak strain,temperature and load time could be calculated from monitoring data.Tests show that it is completely feasible to calculate the permanent deformation for asphalt pavement by using fiber bragg grating sensing technology.