three dimensional finite element modeling of pavement subsurface drainage systems PDF
Preview three dimensional finite element modeling of pavement subsurface drainage systems
UUnniivveerrssiittyy ooff KKeennttuucckkyy UUKKnnoowwlleeddggee University of Kentucky Doctoral Dissertations Graduate School 2005 TTHHRREEEE DDIIMMEENNSSIIOONNAALL FFIINNIITTEE EELLEEMMEENNTT MMOODDEELLIINNGG OOFF PPAAVVEEMMEENNTT SSUUBBSSUURRFFAACCEE DDRRAAIINNAAGGEE SSYYSSTTEEMMSS Yinhui Liu University of Kentucky RRiigghhtt cclliicckk ttoo ooppeenn aa ffeeeeddbbaacckk ffoorrmm iinn aa nneeww ttaabb ttoo lleett uuss kknnooww hhooww tthhiiss ddooccuummeenntt bbeenneefifittss yyoouu.. RReeccoommmmeennddeedd CCiittaattiioonn Liu, Yinhui, "THREE DIMENSIONAL FINITE ELEMENT MODELING OF PAVEMENT SUBSURFACE DRAINAGE SYSTEMS" (2005). University of Kentucky Doctoral Dissertations. 311. https://uknowledge.uky.edu/gradschool_diss/311 This Dissertation is brought to you for free and open access by the Graduate School at UKnowledge. It has been accepted for inclusion in University of Kentucky Doctoral Dissertations by an authorized administrator of UKnowledge. For more information, please contact [email protected]. ABSTRACT OF DISSERTATION Yinhui Liu The Graduate School University of Kentucky 2005 THREE DIMENSIONAL FINITE ELEMENT MODELING OF PAVEMENT SUBSURFACE DRAINAGE SYSTEMS ABSTRACT OF DISSERTATION A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the College of Engineering at the University of Kentucky By Yinhui Liu Lexington, Kentucky Director: Dr. Kamyar C. Mahboub, Professor of Civil Engineering at University of Kentucky Lexington, Kentucky 2005 Copyright @ Yinhui Liu 2005 ABSTRACT OF DISEERTATION THREE DIMENSIONAL FINITE ELEMENT MODELING OF PAVEMENT SUBSURFACE DRAINAGE SYSTEMS Pavement subsurface drainage systems (PSDS) are designed to drain the entrapped water out of pavement. To investigate the effects of various factors on the performance of PSDS, three dimensional models were developed using the finite element method to simulate the unsaturated drainage process in pavement. The finite element models were calibrated using the field information on outflow, peak flow, layer saturations, and time to drain. Through a series of parametric analyses, the factors that significantly influence the performance of PSDS were screened out, and a set of recommendations were made to improve our current drainage practices. The effects of pavement geometry on drainage were studied in this research. The analysis results indicate that edgedrain system can significantly improve the drainage efficiency of a pavement. The drainage performance of a pavement is mainly affected by the geometric factors that related to the edgedrain itself and the geometric factors related to the driving lanes have very limited effects. To investigate the influences of the properties of various pavement materials, some physical-empirical equations were developed in this research. These equations were used to predict the material hydraulic properties from their grain-size distributions and aggregate/asphalt contents. The analysis results of the models with various material properties indicate that the use of permeable base is effective in improving the drainage ability of a pavement. The performance of PSDS is not only affected by material permeability but also by their water retention ability. The pavement works as an integrated hydraulic system and the hydraulic compatibility of materials must be considered in the PSDS design. The effects of climatic factors on pavement drainage were also studied in this research. A method was developed in this research to numerically describe the rainfall events. The analysis results of the models under various rainfall events indicate that rainfall duration is a more important parameter than the rainfall quantity in influencing the pavement drainage. Based on the analysis results, regression equations were developed for the estimation of pavement drainage. Finally, for design application purpose, a series of tables were included in this report to help with proper selected of pavement drainage options. KEYWORDS: Pavement Subsurface Drainage, 3-D Finite Element Modeling, Unsaturated Soil Mechanics, Hydraulic Property Prediction, Rainfall Event Description Yinhui Liu July 14th, 2005 THREE DIMENSIONAL FINITE ELEMENT MODELING OF PAVEMENT SUBSURFACE DRAINAGE SYSTEMS By Yinhui Liu Kamyar C. Mahboub, Ph.D., PE Director of Dissertation Kamyar C. Mahboub, Ph.D., PE Director of Graduate Study July, 14th, 2005 Date RULES FOR THE USE OF DISSERTATION Unpublished dissertations submitted for the Doctor's degree and deposited in the University of Kentucky Library are as a rule open for inspection, but are to be used only with due regard to the rights of the authors. Bibliographical references may be noted, but quotations or summaries of parts may be published only with the permission of the author, and with the usual scholarly acknowledgments. Extensive copying or publication of the dissertation in whole or in part also requires the consent of the Dean of the Graduate School of the University of Kentucky. A library that borrows this dissertation for use by its patrons is expected to secure the signature of each user. DISSERTATION Yinhui Liu The Graduate School University of Kentucky 2005 THREE DIMENSIONAL FINITE ELEMENT MODELING OF PAVEMENT SUBSURFACE DRAINAGE SYSTEMS DISSERTATION A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the College of Engineering at the University of Kentucky By Yinhui Liu Lexington, Kentucky Director: Dr. Kamyar C. Mahboub, Professor of Civil Engineering at University of Kentucky Lexington, Kentucky 2005 Copyright @ Yinhui Liu 2005 DEDICATION To My Parents: Weixin Liu and Shurong Yin My Daughter: Ruth Wu
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