Qualitative and Quantitative Differences in the Calculations of Reinforced Concrete Frames

Abstract

A comparison between the current codes and enforced codes at the time of construction of a real multi-storey reinforced concrete (RC) frame was made. This paper presents qualitative and quantitative differences in the calculation of reinforced concrete structures according to the Technical Standards for Concrete and Reinforced Concrete (PBAB87) and Eurocode 2 (EC 2). A model of the RC frame was created utilizing SAP2000 software to check the internal forces and moments and the basic dynamic properties of the structure. The value of the fundamental period of the modelled structure, as one of the most important dynamic properties of the structures, was compared with the values calculated according to the equations given in Eurocode 8 (EC 8), but also by other norms and according to several expressions given by the researchers. Large differences in the values of the fundamental period were found and it was from 3.4% up to 60%.