Abstract
An improved interface smeared crack method for finite element modeling of cracks in concrete is developed into a usable procedure and applied to the seismic analysis of concrete gravity dams. The method pushes back displacements in elements bordering an open-crack interface to eliminate strains normal to the crack face. The amount of pushing back is found by dividing the normal strain by the appropriate strain interpolation function derivative. Pushing-back algorithms are described for interfaces at angles to the global coordinates and for skewed elements. A biaxial tensile strain failure criterion is employed. The method is combined with a cyclic ultimate strength equivalent uniaxial strain material model to analyze the behavior of Koyna Dam in the December, 1967 earthquake.
Published Version
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