Analytical and Experimental Evaluation of Stiffness Parameters of Voided Concrete Slab Bridges. Volume 2. Strength Design of Longitudinally and Transversely Posttensioned Voided Slab Bridges

摘要

The study investigates the ultimate strength of longitudinally and transversely prestressed, continuous, curved, voided slab bridges. The ultimate capacities in pure bending and pure torsion are first examined followed by an investigation into the interaction between bending, shear and torsion at failure. An approximate one dimensional analysis is developed to determine the ultimate bending capacity of longitudinally and transversely prestressed sections. The effect of transverse prestress is incorporated by using biaxial stress strain relations in a strain compatibility analysis. Parametric studies are conducted to determine the influence of the magnitude of the transverse prestress on the ultimate flexure capacity.