International Journal of Civil Engineering

en A Geometrical Inclusion-Matrix Model For Concrete Research Paper Research Paper Concrete is a heterogeneous material with a highly non linear behavior, which is mainly caused by theinitiation and propagation of micro cracks within the several components of the material. The damage behavior ofconcrete is usually simulated on the macro scale using complex constitutive models. The direct determination of thehomogenized material parameters is often difficult and sometimes impossible. Furthermore these materials models donot explicitly represent effects and bond behaviors of interfaces between the several components. So in order to predictof concrete behaviors and characteristics, it should be modeled as a three phase composite material consisting ofaggregate, interfacial transition zone (ITZ) and cement paste. The size and distribution of aggregate affects concretecharacteristics. Because of the random distribution and size variation of aggregate in concrete, the modeling ofconcrete behavior based on component in meso structure is difficult and so we must use simple assumption. In thispaper with mixing design and grading curve we developed a simple method to replace real aggregate with equivalentsphere aggregate with effective diameter. So we can use simple methods instead of complex numeral and randomnessor x ray methods to find effective diameter and use it to determine two arrangements with maximum and minimumaggregate volume as a repeatable basical element .As a result we can use this element to modeling the behavior ofsample concrete in meso scale and three phases. Aggregates, Equal shape, Concrete, Interfacial zone, Grading, Specific surface area 73 82 http://ijce.iust.ac.ir/browse.php?a_code=A-10-84-8&slc_lang=en&sid=1 I. Rasoolan 180031947532846006059 180031947532846006059 No S.A. Sadrnejad sadrnejad@kntu.ac.ir 180031947532846006060 180031947532846006060 Yes A.R. Bagheri 180031947532846006061 180031947532846006061 No