Abstract: The use of new materials such as high strength concretes and high strength steels is pressurising researchers to modify computational models on continuous basis, in particular the models for the calculation of shear capacity of reinforced concrete beams. Some of these changes can be observed in current European standards, for example in fib Model Code 2010 (PreNorm), were in contrast to Eurocodes, in the case of shear capacity of reinforced concrete beams supports zone, concrete capacity was included. This paper presents a comparative analysis of theoretical and experimental shear load capacities of reinforced concrete beams support zone. The theoretical capacities used in this paper were calculated based on currently used standards which were divided into two groups. The first group included standards which identified the support zone capacity as the capacity of only shear reinforcement without concrete capacity taken into account (PN-EN-1992-1-1). The second group were standards in which the support zone shear capacity was a sum of concrete and reinforcement capacities (fib Model Code 2010, ACI-318). Shear capacities calculated based on designated standards were verified by the experimental tests carried out on single-span, statically determinable, reinforced concrete beams, loaded monotonically to failure. It should be noted that in the case of Model Code 2010, the calculations took into account the higher values of concrete capacities than those specified in the standard regulations. The comparative analysis showed smaller differences between the experimental and theoretical shear capacities in the case of results calculated according to MC 2010, with higher level of concrete capacities, and ACI-318 then in case of PN-EN-1992-1-1. These results of shear capacity were obtained as the sum of the concrete and shear reinforcement capacities. The smallest differences were obtained by using the method given in ACI-318, which takes into account the bigger values of concrete load capacity than other standards In this regard further analysis of the shear capacity of reinforced concrete beams support zone needs to be performed to enable the introduction of corrections to the standards in which the shear capacity of the concrete is neglected in total shear capacity of the support zone.
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Web of Science