Application of a 3-D crack analysis model to RC cantilever decks of excessive cracking

The excessive cracking of RC cantilever decks, which often requires special attention for structuralengineers, is studied using a three-dimensional crack analysis model. The model is based on a fractureenergy approach for analyzing cracks in concrete, and the numerical analysis is carried out using amodified load control method. The problem of excessive cracking is then studied with four different span-ratios.Based on the numerical results, the crack behavior with respect to the patterns of crack propagation,dissipation of the fracture energy, and effects on the structural integrity are discussed. The mechanismswhich cause the excessive cracking are also explained.