Volume 42, Issue 5 (September 2014)

    Comparison of Two Beam Fatigue Tests

    (Received 11 September 2013; accepted 5 February 2014)

    Published Online: 2014

    CODEN: JTEOAD

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    Abstract

    The objective of this study is to compare the fatigue behavior in two beam fatigue tests: the Four Point Bending Test (FPBT) and the Beam on Elastic Foundation (BOEF) test. It is believed that the BOEF test simulates the fatigue behavior of asphalt mixtures in a more realistic way. The beam specimens used for both the FPBT and BOEF tests are made of gravel asphalt concrete (GAC). Finite element simulations of the BOEF test are carried out to understand better the behavior of the GAC beam. The results show that in the BOEF tests, cracks will develop from the middle bottom of beam while the FPBTs at low temperature show no crack. This finding further supports the idea that improved fatigue tests are needed which better represent the cracking behavior of asphalt pavements. However, the BOEF test also shows the development of an accumulated strain along with the cyclic strain. This shows that further investigation is needed to determine the cause of fatigue cracks; are they due to the cyclic strain or due to the accumulated strain? Another important finding is that at a temperature of 5°C and a frequency of 8 Hz, the fatigue life obtained with the BOEF test is 20 times higher (on average) than FPBT fatigue life.


    Author Information:

    Pramesti, F. P.
    Road Engineering, Faculty of Civil Engineering and Geosciences, Delft Univ. of Technology, Delft,

    Civil Engineering Dept, Faculty of Engineering, Universitas Sebelas Maret, Surakarta,

    Molenaar, A. A. A.
    Road Engineering, Faculty of Civil Engineering and Geosciences, Delft Univ. of Technology, Delft,

    van de Ven, M. F. C.
    Road Engineering, Faculty of Civil Engineering and Geosciences, Delft Univ. of Technology, Delft,

    Qiu, J.
    Road Engineering, Faculty of Civil Engineering and Geosciences, Delft Univ. of Technology, Delft,

    Woldekidan, M. F.
    Department of Technology and Development, BAM Wegen bv, Utrecht,


    Stock #: JTE20130226

    ISSN: 0090-3973

    DOI: 10.1520/JTE20130226

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    Author
    Title Comparison of Two Beam Fatigue Tests
    Symposium , 0000-00-00
    Committee D04