This paper describes an approach to develop an analytical scheme for a prediction of life span of concrete material. Failure simulation of concrete at material scale by discrete analysis method, which can consider the effect of its component including environmental…
This paper describes an approach to develop an analytical scheme for a prediction of life span of concrete material. Failure simulation of concrete at material scale by discrete analysis method, which can consider the effect of its component including environmental effect, is conducted to evaluate the concrete mechanical damage or fracture directly. As the chronological damage, a frost damage effect is introduced by the meso scale fracture. Fatigue simulation is conducted by modeling the time-depend phenomenon including elastic, visco-elastic, visco-plastic and cracking component. 1 INTRODUTION a function of normal and shear stresses, respectively. For the static analyses, aggregate, mortar and their Concrete material is, in fact, consisted of aggregates interface were separately modeled and the constitutive and cement paste, therefore its behavior is hetero- law was introduced. Based on this concept, chrono- geneous. However, as stress-strain model of concrete in logical phenomenon is predicted in this study that continuous numerical method such as finite element are deterioration by frost damage and fatigue loading. analysis corresponds to an average response of To simulate the mechanical characteristics of damaged certain area, concrete is often treated as homo- concrete by frost-damage, zero strength elements and geneous material in engineering field. While such the concept of mesoscale plastic tensile strain are homogeneous modeling of concrete is useful in introduced into the normal RBSM springs to design, there are some problems. Especially, modeling consider the experimentally observed cracking and of crack is one of the most difficult points. For plastic deformation caused by frost damage.