Investigation of RC Buildings with Basement Floor using Single and Two Loaded Approaches in TBEC-2018

Abstract

Abstract Population growth and the resulting increased parking lots etc. needs buildings with basement floors. Moreover, it is clear that the buildings with basement floors have a high degree of rigidity. Turkish Building Earthquake Code-2018 introduced new approaches for finite element modelling and earthquake analysis of buildings with basement floor. One of them is that two-loaded state and the other one is single-loaded state. While the upper section and the lower section (basement) masses are considered separately in the two-loaded analysis, they are taken into account in the combined model in the single-loaded analysis. The study aims to investigate the effectiveness of these two approaches. For the purpose, a RC building with 1 basement floor + 5 storeys is separately modelled considering both of single-loaded and two-loaded approaches. Finite element analyses are performed using mode combination technique. The storey shear forces, displacements, column and wall internal forces were compared obtained for both single-loaded and two-loaded models. The results show that the bot of method should be used to design of RC building with basement floor.