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 structural<br />engineers, is studied using a three-dimensional crack analysis model. The model is based on a fracture<br />energy approach for analyzing cracks in concrete, and the numerical analysis is carried out using a<br />modified load control method. The problem of excessive cracking is then studied with four different span-ratios.<br />Based on the numerical results, the crack behavior with respect to the patterns of crack propagation,<br />dissipation of the fracture energy, and effects on the structural integrity are discussed. The mechanisms<br />which cause the excessive cracking are also explained.