Abstract

In this study a multi-mode, adaptive, spectra based pushover procedure is presented in order to estimate the structural performances of 3D medium-rise unsymmetric-plan buildings. Response Spectrum Analysis (RSA) procedure has become a standard analysis tool for buildings, however single-mode pushover analysis can be applied to only regular low-rise building structures. This presented procedure (IRSA) is an advanced multi-mode pushover analysis that takes into account the effects of higher modes and can be applied effectively to irregular buildings. IRSA procedure is based on using RSA at each piecewise linear incremental step between the formation of consecutive plastic hinges. For the purpose of comparison, storey displacements of unsymmetric-plan medium-rise buildings are computed using nonlinear Response History Analysis (RHA) and the results are compared with the presented method (IRSA) together with the Modal Pushover Analysis (MPA) method. It is illustrated that the proposed method can compute-estimate the seismic demands of the buildings with reasonable accuracy.

Keywords:

Multi-mode pushover analysis, nonlinear behavior, reinforced-concrete buildings, unsymmetric-plan buildings,

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Competing interests

The authors have no competing interests.

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