Abstrakt

Deep beams used as the main reinforced concrete structural elements which taking over the load and stiffening construction are often found in high-rise buildings. The architecture of these buildings is sometimes sophisticated and varied, arouse the admiration of the majority of recipients, and thus causing an engineering challenge to correctly design the structural system and force transfer. In such structures is important to shape the reinforcement in order to make the best use of reinforcing steel for taking over the load and minimize the crack widths. Despite the wide use of these elements, they are still not covered by the relevant design codes. In the current technical literature there is little information on the dimensioning of reinforced concrete cantilever deep beams or deep beams with overhangs and only few based on experimental research. This paper presents the results of experimental investigations of two reinforced concrete cantilever deep beams with shear slenderness lk / H = 0.3 under static load distributed on the entire height. The research elements were part of the spatial reinforced concrete deep beam systems, consisting of a transversal deep beam and suspended on it the longitudinal deep beam with cantilever. Reinforced concrete deep beam joints had various reinforcements. The article presents results on steel effort and force distribution in the reinforcement of short cantilever deep beam indirectly loaded. The effectiveness of the mixed reinforcement in both tested cantilever deep beams, as referred to the design recommendation proposed in the published papers is also verified. © Federation Internationale du Beton (fib) - International Federation for Structural Concrete, 2019.

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