Dissertation
A PRELIMINARY STRUCTURAL DESIGN GUIDELINE FOR PERVIOUS CONCRETE PAVEMENT SYSTEM USING FINITE ELEMENT METHODS
Doctor of Philosophy (PhD), Washington State University
01/2013
Handle:
https://hdl.handle.net/2376/111977
Abstract
The limited use of pervious concrete in highway shoulders and mainline highway slabs is due to the ambiguity in characterizing its mechanistic response (stresses and deflections) for high volume and heavy traffic applications. In addition, limited research has been performed for the structural design of pervious concrete pavement system. In this research, finite element methods have been used to evaluate the mechanistic response of pervious concrete pavement systems. In addition, porosity and compression tests have been performed on cylindrical specimens to evaluate the modulus of elasticity of pervious concrete for a desired level of porosity. Two general purpose finite element software packages, ABAQUS and ADINA, were used to perform the analyses of pervious concrete pavement systems.
At the beginning, a finite element modeling procedure has been developed using the vertical porosity distribution in pervious concrete and dividing the pervious concrete surface layer into three layers. Then, the model was validated against a field application and a factor of safety of `Two' was proposed for repetition of truck traffic on the pavement, based on Pavement Condition Index (PCI) rating data. Finally, analyses were performed for different coefficients of friction between the layers of the pavement system. In between the finite element analyses, pervious concrete cylindrical specimens were prepared and equations were proposed to estimate the modulus of elasticity of pervious concrete for a given porosity.
The analysis results were combined in an integrated platform and several conversion factors were developed to estimate the modified load repetition safety factor. A design chart has been proposed to estimate the required thickness of the surface layer of a pervious concrete pavement system on the basis of the predicted flexural strength of the pervious concrete. Although there are a few limitations, it is expected that the finite element modeling approach of pervious concrete will be used for scholarly research, a numerical model to evaluate the modulus of elasticity of pervious concrete for a desired level of porosity, and as a preliminary design guideline that can be used nationally and internationally by the concrete and pavement design industry.
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Details
- Title
- A PRELIMINARY STRUCTURAL DESIGN GUIDELINE FOR PERVIOUS CONCRETE PAVEMENT SYSTEM USING FINITE ELEMENT METHODS
- Creators
- Md Ashraful Alam
- Contributors
- Liv Haselbach (Advisor)William F Cofer (Advisor)Hiafang Wen (Committee Member)Srinivas Allena (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Civil and Environmental Engineering, Department of
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Number of pages
- 331
- Identifiers
- 99900581447601842
- Language
- English
- Resource Type
- Dissertation