Abstract
A nonlinear constitutive model for plain concrete subjected to cyclic biaxial stresses is described in brief. The model takes account of the compressive softening of concrete prior to reaching maximum compressive stress. Two reinforced concrete shear wall structures, one loaded monotonically and the second subjected to large cyclic load reversals are analyzed and compared with test data. Simulation of cyclic loading response is greatly improved compared to previous elastoplastic models. In addition to the improved material characterization in compression, the treatment of tensile cracking is felt to be a significant factor in the good match obtained with experimental data.
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