Comparative study of various smeared crack models for concrete dams

Abstract

Comparative study of various smeared crack models for concrete dams The nonlinear seismic response of concrete gravity dams is investigated in the paper. Nonlinear fracture mechanics based on three smeared crack models is used for comparative study of the cracking profile and dam response. Using the finite element method, the dynamic equation is solved by means of the modified Newton-Raphson method and Bosak's time integration algorithm. The effects of crack models on seismic response of Pine Flat Dam are discussed. The results reveal some differences in principal stress, dam crest displacement, and in the number and shape of cracks.

Assessing the shear behavior of corroded steel fiber reinforced concrete beams without shear reinforcement using nonlinear finite element analysis

“…The devices were installed on the bottom surface of the tested beam, while displacement points in FEM were determined at the loading point. Additionally, because of the stress locking in the smeared crack concrete model, the simulated stiffness after cracking was higher than that of the experiment [32,33]. Table 2 compares the load-carrying capacity between the predicted and experimental data.…”