Concrete Model Analysis of Structural Elements Developing Strength Reduction Concepts

Résumé du livre

A dimensional analysis develops the scale factors for direct and strength-reduction models. A method is presented for designing model concretes suitable for use in small-scale models that will produce strength characteristics essentially the same as prototype concrete. Bond strength of model concrete reinforcement was studied, and an apparatus was developed to put deformations in wire. Pullout tests were conducted to evaluate the bond strength developed by laboratory-deformed wires. To develop the concepts of strength-reduction modeling, a series of beam tests was conducted. These tests revealed that models will accurately reproduce prototype failure modes and ultimate strengths. The accuracy of strains and deflections depends on the significance of distortion in the model. The shear strength of the model was found to be dependent upon the square root of the ultimate concrete compressive stress; strength scale factors should be applied to the square root value. Further tests involved columns, prestressed beams, and flat slabs. (Author).