1st Croatian Conference on Earthquake Engineering 1CroCEE 2021

The buildings with a soft storey represent a great danger for the safety of the tenants in seismically active areas. Because of the improper distribution of stiffness in height of the building, the seismic effect results in a failure in the most unfavourable way, that is, an unannounced collapse through a soft storey, whereby plastic joints are formed first in the columns, without dissipation of energy through plastic joints in the beams.
The purpose of this research is to compare the behaviour of a regular RC building and a RC building with a soft storey, which will show the negative effects that the soft storey has on the overall behaviour of the building. Additionally, a linear and nonlinear static analysis of RC buildings with a soft storey is made according to the applicable Macedonian regulations and according to the Eurocode. The comparison made justifies the applicability of the recommendations and criteria for the design and construction of these systems.
Linear static analysis of regular RC building and RC building with a soft storey according to Macedonian regulations and according to Eurocode was performed and a comparison of the obtained results is given. More detailed insight in the influence of the soft storey to the buildings is given through the non-linear static analysis (Pushover) made on the same RC building designed according to different rulebooks, one according to Eurocode and another according to the Macedonian regulations, and another comparison of the obtained results with a more detailed non-linear analysis was made where the development of the plastic hinges along the height of the building is shown.