This paper attempts to manipulate brittle shear failure in reinforced concrete deep beam which has shear span-to-depth ratio, a/d=2.0 with aid of lattice model. Timoshenko beam type of lattice model was basically used for reinforcing steel in order to incorporate the dowel action. Truss type of lattice model was applied for plain concrete domain using union-jack type of structured mesh. Mesh sensitivity analyses focused with varying different level of unit union-jack block discretization.

Short-fiber reinforcement is commonly added to concrete to improve various aspects of their durability and performance. Effective designs of fiber reinforced concrete depend not only on material composition, but also on the methods of processing. In particular, the distribution of fibers within a structural component can significantly affect its resistance to cracking and, therefore, its durability when exposed to severe environments. Probability-based analyses can be used to accommodate such factors in life cycle performance evaluation, in which the relevant performance measures are described by probability density functions and their evolution over time. This paper concerns the simulation of fiber reinforced concrete using lattice models, in which the individual fibers are explicitly modeled within the material domain. This approach facilitates the study of non-uniform fiber dispersions and their potential effects on structural performance.