Abstract
In recent years, nonlinear static procedures (NSPs) have gained considerable popularity as an efficient tool in the performance based seismic design practice. This was backed by extensive corroboration studies that have demonstrated its good accuracy in estimating the seismic response of regular structures. Despite the numerous improvements of the original versions of NSPs, their use to assess the seismic response of irregular structures and high-rise buildings is still challenging; they are not able to predict with sufficient accuracy all the complexities associated to the seismic response of this type of structures. Thus, an improved upper-bound (IUB) pushover procedure for seismic assessment of plane frames is presented in this paper, aiming to enhance the accuracy of existing methods in predicting the seismic behaviour of high-rise buildings. The novelty of this proposal is based on the adjustment of the pattern of the lateral load of the upper-bound pushover method applied to tall structures. The accuracy of the procedure is tested using nine, twelve, fifteen and twenty storeys steel buildings. The results of the (IUB) are compared to those of the capacity spectrum method, the modal pushover analysis, the upper bound pushover analysis, the modified upper bound pushover analysis and the non-linear time history analysis (NTHA). In most cases, the proposed procedure shows better results and closer to those obtained by NTHA.
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The financial support of the Ministry of higher education MESRS in Algeria (Grant CNEPRU J0400420140007) for conducting this study is greatly acknowledged.
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Rahmani, A.Y., Bourahla, N., Bento, R. et al. An improved upper-bound pushover procedure for seismic assessment of high-rise moment resisting steel frames. Bull Earthquake Eng 16, 315–339 (2018). https://doi.org/10.1007/s10518-017-0204-9
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DOI: https://doi.org/10.1007/s10518-017-0204-9