000004917 001__ 4917
000004917 005__ 20141119144604.0
000004917 04107 $$aeng
000004917 046__ $$k2002-06-02
000004917 100__ $$aA.R.Abbas
000004917 24500 $$aMICROSTRUCTURAL ANALYSIS OF THE CONSTITUTIVE BEHAVIOR OF ASPHALT CONCRETES

000004917 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004917 260__ $$bColumbia University in the City of New York
000004917 506__ $$arestricted
000004917 520__ $$2eng$$aAsphalt concretes are composite materials consisting of interspersed aggregates, asphalt binder and air voids. Their constitutive behavior depends largely on the interaction of the aggregates and the binder, which have drastically different stiffnesses. This behavior is further complicated by the non-linear viscoelastic behavior of the binder. The paper at hand presents a fundamental methodology for describing the constitutive behavior of asphalt concretes. It involves three main steps. The first step involves the development of mechanistic binder models from rheological measurements and their implementation into stress-strain relationships suitable for FEM modeling. Binder non-linearity is treated in a piece-wise linear fashion, whereby the binder model constants are assigned as a function of strain level. The second step involves capturing the microstructure of asphalt concretes trough imaging techniques and processing the images to translate them into FEM grids. The third step involves verification of these asphalt concrete models by comparing predictions of shear modulus and phase angle to the properties measured in the laboratory using a Simple Shear Test (SST).

000004917 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004917 653__ $$abinder, viscoelastic, non-linear, asphalt concrete, finite element.

000004917 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004917 720__ $$aA.R.Abbas$$iA.T.Papagiannakis$$iE.A.Masad
000004917 8560_ $$ffischerc@itam.cas.cz
000004917 8564_ $$s297749$$uhttps://invenio.itam.cas.cz/record/4917/files/536.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004917 962__ $$r4594
000004917 980__ $$aPAPER