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Key Words: Indirect Tension Test, residual strain, multilayer elasticity theory, FWD, dynamic loading

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Correction of Analyzed Pavement Strain by Incorporating Residual Strain with Dynamic Loading

Hideto TAKEMOTO , Ryuji ABE and Yuichi KUBO

In the theoretical design of pavement, strains that occur in pavement layers are obtained by a mechanical analysis and the number of years to fatigue failure is estimated based on the fatigue characteristics of materials. It is very important to accurately estimate the strain induced by traveling vehicles. In this research, the residual strain was measured in an indirect tension test, and calculation of strain from this measurement was studied. The strain generated in the asphalt mixture layer by traveling vehicles was calculated using multilayer elastic theory analysis, and a correction that considers residual strain was performed. The correction was examined by comparing the results with measured strain caused by traveling vehicles.

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