Comparative analysis of normative provisions for seismic design and detailing of reinforced concrete structures

Abstract

The main objective of this work is to carry out a comparative analysis between the methods and provisions of the Brazilian code ABNT NBR 15421:2006 and those of the ASCE/SEI 7 and the Eurocode 8, on the seismic design of structures. The similarities and differences between these standards, as far as the application of the Equivalent Lateral Forces method (ELFM) and the Response Spectrum method (RSM) are concerned, will be addressed. The responses will be evaluated for a case study that will be modelled by the SCIA Engineer 17 software. This paper also presents some comments on the detailing of reinforced concrete structures to ensure a good performance under seismic loading, allowing for a more favourable interpretation of the seismic analysis results.

Seismic analysis of reinforced concrete buildings with participating masonry infills

“…In terms of seismic events, Rodrigues et al [11] highlight that South America has distinct regions in terms of seismic activity. The western border has high seismic activity, due to its location on the boundary between tectonic plates, which justifies the fact that the countries located in this region have had codes for seismic design for decades.…”

“…In Brazil, it was only in 2006 that the first code for seismic design was approved -ABNT NBR 15421 [12]. However, Rodrigues et al [11] warn that more recent studies developed by the University of São Paulo point to the need to update seismic mapping in Brazil. The study by Nóbrega et al [13] indicates that although seismic activity in Brazil is less frequent with low magnitudes, it should not be overlooked and highlight the fact that ABNT NBR 15421 [12] presents a seismic acceleration map, based on a worldwide study carried out in the 1990's.…”