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https://scholarbank.nus.edu.sg/handle/10635/65199
Title: | Back-calculation of parameters for slab on two-layer foundation system | Authors: | Shuo, L. Fwa, T.F. Tan, K.H. |
Issue Date: | Nov-1997 | Citation: | Shuo, L.,Fwa, T.F.,Tan, K.H. (1997-11). Back-calculation of parameters for slab on two-layer foundation system. Journal of Transportation Engineering 123 (6) : 484-488. ScholarBank@NUS Repository. | Abstract: | Most highway and airport rigid pavements constructed today consist of a subbase layer, giving rise to a system of a concrete slab supported on a two-layer foundation. This paper makes use of the solution of a slab on a two-layer system to derive a closed-form procedure for back-calculation analysis of pavement parameters A computer program called NUS-DEF3 to solve for surface deflections is developed as a subroutine in the back-calculation analysis. The algorithm for the closed-form back-calculation of this system is presented This algorithm reduces a system of three equations with three unknowns to one single nonlinear equation. It differs from the convention approach of searching for the best solution iteratively by means of the least-squares method and gives unique closed-form solutions without the need to select an initial modulus to start with. Solutions to numerical examples of three typical slab-on-two-layer-foundation problems are presented. | Source Title: | Journal of Transportation Engineering | URI: | http://scholarbank.nus.edu.sg/handle/10635/65199 | ISSN: | 0733947X |
Appears in Collections: | Staff Publications |
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