Open AccessAnalysis of Soft Story and Torsional Irregularity Factors in the Seismic Performance of Reinforced Concrete Buildings by Nonlinear Static Analysis
Author(s) -
W A Lagos,
O E Blas,
J. Orihuela
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/814/1/012011
Subject(s) - structural engineering , torsion (gastropod) , nonlinear system , reinforced concrete , seismic analysis , geology , engineering , physics , medicine , surgery , quantum mechanics
The seismic design of irregular buildings is usually developed using an irregularity factor according to its nature. However, seismic stresses are impacted as the irregularity approaches the extreme limit. In this study, we analyzed the soft story and torsional irregularity factors of reinforced concrete structures with structural system: frame, dual and structural walls of 5, 7 and 10 floors respectively. To this end, a Nonlinear Static Analysis (NLS) - Pushover was carried out. This analysis is carried out in two stages. First, a regular structure is analyzed in plan and in elevation, which is the regular model. Second, the geometry of the regular structure is modified in plan and in elevation in order to perform the same analysis, so as to show irregularity due to soft story and torsion. The purpose is to obtain the structural response with variations of both irregularities from minor to major. Lastly, the seismic stresses obtained from the irregular models are compared with the regular model response, and then, new irregularity factors are proposed for the cases studied.