Critical Stress

It is sometimes worth checking the level of stresses of a CRCP in order to evaluate the use of alternate base types. A program based on elastic layered theory (ELSYM5 or BISAR) can be used for this purpose. Alternatively, dis- crete element (SLAB49) or finite element (ILLISLAB, ISLAB2000, ABAQUS, EverFE) methods can be used.

These programs can also be used to model Westergaard’s plate theory and develop composite k-values. Additional discussion of stress evaluation can be found in the AASHTO MEPDG documentation.(1)Guide for Mechanistic-Empirical Design of New and Rehabilitated Pavement Structures (NCHRP 1-37A)

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