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Poroelastic Modeling of Multi-Layered Pavement Systems

Wan, Zhe (2022) Poroelastic Modeling of Multi-Layered Pavement Systems. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Excessive moisture entrapped in sub-surface layers is a concern for most roadways in the
U.S., with climate change significantly increasing the chances of prolonged moisture exposure.
Under heavy traffic loads, the entrapped moisture causes buildup of pore pressure that accelerates
pavement damage. However, current pavement design methods do not consider this phenomenon
directly. This study applied Biot’s theory of poroelasticity to model pavement layers under
saturated conditions. A poroelastodynamic finite integration technique (PEFIT) method was
developed in this study to numerically evaluate the hydrodynamic responses of various types of
pavements under a moving load.
In flexible pavements, the effect of traffic speed, unbound layer hydraulic conductivity,
and drainage conditions on the development of pore pressure was analyzed. In rigid pavements,
the effect of joints on pore pressure development and pore water movement in the unbound base
layer was investigated. Various properties of the concrete layer and the base layer, such as the
thickness and Young’s modulus of concrete, base hydraulic conductivity, and resilient modulus,
were examined for their effects on the hydrodynamic responses. Lastly, in unbonded concrete
overlays, the effect of an open-graded asphalt interlayer drainability was analyzed. The
relationships between the interlayer air void content, interlayer hydraulic conductivity, and the
maximum pore pressure under the moving load were evaluated.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Wan, Zhezhw73@pitt.eduzhw73
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairKhazanovich,
Committee MemberVandenbossche,
Committee MemberTrenchea,
Committee MemberAlavi,
Date: 6 September 2022
Date Type: Publication
Defense Date: 21 June 2022
Approval Date: 6 September 2022
Submission Date: 2 August 2022
Access Restriction: 2 year -- Restrict access to University of Pittsburgh for a period of 2 years.
Number of Pages: 165
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Civil and Environmental Engineering
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: Pavement design; moisture; granular layers; poroelastic materials; hydraulic conductivity
Date Deposited: 06 Sep 2022 16:42
Last Modified: 06 Sep 2022 16:42


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