Strenght and deformations of structural concrete subjected to in plane shear and normal forces

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This doctoral thesis was developed as part of the research project "Deformation Capacity of Structural Concrete," which seeks to create a consistent and experimentally validated theory regarding the deformation capacity of structural concrete. Previous research led to the Tension Chord Model, providing a comprehensive understanding of the load-deformation behavior of tension members in both non-prestressed and prestressed concrete structures. The current work introduces the Cracked Membrane Model, which integrates concepts from the modified compression field theory and the tension chord model for members under in-plane forces. This new model determines crack spacings and tension stiffening effects in cracked membranes from fundamental principles, linking to plasticity theory by formulating equilibrium conditions in terms of stresses at the cracks rather than average stresses. The research project has received funding from the Swiss National Science Foundation and the Association of the Swiss Cement Producers, for which gratitude is expressed. This thesis aims to enhance the understanding of the load-carrying and deformation behavior of structural concrete when subjected to in-plane shear and normal forces.