ROBUSTNESS OF REINFORCED CONCRETE STRUCTURAL SYSTEMS WITH FLAT SLABS WHEN A KEY ELEMENT FAILED

Abstract

The robustness of reinforced concrete structural systems today is one of the most pressing issues in world design practice, which requires theoretical and experimental research, the development of new and improvement of existing calculation approaches.
The article considers an approach for determining the non-linear load-displacement reaction of a reinforced concrete structural system with flat slab in case of failure of the central column. The main principles of macro-modeling of damaged reinforced concrete systems are described. The presented theoretical dependences are based on the provisions of the energy balance of the damaged system and make it possible to take into account such characteristic mechanisms of resistance to progressive collapse as bending, punching, and tensile membrane action.