Structural analysis of multi-layered concrete pavement systems
Khazanovich, Lev
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https://hdl.handle.net/2142/22010
Description
Title
Structural analysis of multi-layered concrete pavement systems
Author(s)
Khazanovich, Lev
Issue Date
1994
Doctoral Committee Chair(s)
Ioannides, Anastasios M.
Department of Study
Civil and Environmental Engineering
Discipline
Civil Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Civil
Language
eng
Abstract
This study is concerned with analytical and numerical procedures applied to multi-layered concrete pavement systems. In the first part of this Thesis, analytical solutions for interior and edge loading are presented. The Burmister analytical solution for interior loading of a multi-layered system is expanded to the more general case of systems in which each component may be treated as a Burmister layer, or as an elastic spring bed, or as a plate. This study is useful for comparison of different models of pavement systems. The proposed procedure is implemented in the FORTRAN code DIPLOMAT. An edge loading solution for two semi-infinite plates resting on a general, multi-component linear elastic foundation is also obtained. The solution is implemented in the FORTRAN code DIPLOMAT-E. Several particular cases are considered in detail.
The second part of this Thesis focuses on finite element models for concrete pavement systems. Finite element formulations for higher order subgrade soil models are developed. The corporation of the subgrade models by Vlasov-Pasternak, by Kerr and by Zhemochkin-Sinitsyn-Shtaerman into a new version of the computer program ILLI-SLAB, code-named ILSL2, is described. A comparative study of these foundation models has been conducted. The effect of the size of the loaded area on the applicability of the conventional dense liquid model has been investigated.
A formulation for finite element analysis of the Totsky model is also developed and incorporated into ILSL2. Thus, ILSL2 is capable of analyzing the effect of separation between and compressibility of constructed layers in a multi-layered concrete pavement system.
"A general formulation for the analysis of the effect of nonlinear temperature (or moisture) differentials on the stresses and deflections in concrete pavement systems is presented. The concept of ""Equivalent Temperature Distributions"" is explored for a multi-layered systems."
"It is anticipated that the results of this study will contribute toward the improvement of current mechanistic-based design procedures. Findings may be implemented in future ""unified"" or ""limit state"" design procedures. This study will also enhance current methods used in interpreting nondestructive testing deflection measurements from in situ multi-layered PCC pavements."
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