Estimation of in situ dynamic modulus by using MEPDG dynamic modulus and FWD data at different temperatures

J. Seo, Youngho Kim, J. Cho, S. Jeong

    Research output: Contribution to journalArticle

    22 Citations (Scopus)

    Abstract

    A fundamental study of a dynamic modulus for asphalt pavements was conducted using experimental tests and numerical simulations. The emphasis was on the loading frequency-vehicle speed relationships directly caused by the test results of vertical compressive stress pulse durations along the depth. A framework for determining the dynamic modulus is proposed based on the dynamic effects. It is shown that the proposed dynamic modulus is capable of predicting the asphalt pavement behaviour with varying vehicle speeds. The converting factor that can estimate the in situ dynamic modulus from the undamaged dynamic modulus is also proposed using a falling weight deflectometer modulus. Through comparisons with case histories, the maximum relative error of longitudinal strain is 50.4% with an undamaged dynamic modulus and 10.5% with an in situ dynamic modulus. The proposed methods with a converting factor are in agreement with the general trend observed by in situ measurements along the vehicle speeds. © 2013 Taylor & Francis Group, LLC.
    Original languageEnglish
    Pages (from-to)343-353
    JournalInternational Journal of Pavement Engineering
    Volume14
    Issue number4
    DOIs
    Publication statusPublished - 2013

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