Relationship between resilient modulus and soil index properties of unbound materials

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In the mechanistic design approach, which has already been started to utilize in
several countries, the variations in material properties are better taken into account
based on fundemental engineering principles. Resilient modulus is the most
important material property that is used in the mechanistic design since it describes
the true martial performance of unbound pavement layers under traffic loading. In
this thesis, the objective is to determine the resilient modulus, used in the
mechanistic design of pavement structures, for the unbound material types used in
Turkey and develop linear and nonlinear prediction models to determine resilient
response of unbound layers based on soil index properties, California Bearing Ratio
(CBR) and Light Falling Weight Deflectometer (LFWD) test results. Application of
genetic algorithm and curve shifting methodology to estimate design resilient
modulus at various stress states is also investigated using the test results for finegrained
soils. Resilient modulus estimation for a constant stress state based on
genetic algorithm and curve shifting methodolgy is quite promising for fine-grained
soils since nonlinear constitutive models do not have the capability of representing
resilient responses under different conditions. Furthermore, tree-based modeling is
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discussed as an alternative way to develop resilient modulus prediction models. The
outcome of the study will be a basis for the performance based design specifications
of flexible pavements.
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Erdem Çöleri
Relationship between resilient modulus and soil index properties of unbound materials · 2007 · 174 sayfa.
Danışman: Yrd. Doç. Dr. Murat Güler
Bu araştırmanı devamına: http://tez2.yok.gov.tr/tez.htm adresinden ulaşabilirsiniz.