A DISPLACEMENT-BASED ADAPTIVE PUSHOVER ALGORITHM FOR ASSESSMENT OF VERTICALLY IRREGUL
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A DISPLACEMENT-BASED ADAPTIVE PUSHOVER ALGORITHM FOR ASSESSMENT OF VERTICALLY IRREGUL
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A DISPLACEMENT-BASED ADAPTIVE PUSHOVER ALGORITHM FOR ASSESSMENT OF VERTICALLY IRREGULAR FRAMES

Author: RUI PINHO ; STELIOS ANTONIOU | Size: 259 KB | Format: PDF | Quality: Unspecified | Publisher: 4th European Workshop on the Seismic Behaviour of Irregular and Complex Structures Thessaloniki, Greece, 26–27 August 2005 | Year: 2005 | pages: 16


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Due to the unvarying nature of the applied displacement loading vector, conventional (nonadaptive) displacement-based pushover analysis can conceal important structural characteristics, such as strength irregularities and soft storeys, should the displacement pattern adopted at the start of the analysis not correspond to the structure’s post-yield failure mechanism. Consequently, when only non-adaptive static nonlinear analysis tools are available, as has been the case throughout the past, force-based pushover does constitute a preferable choice over its displacement-based counterpart. On the other hand, however, if one
is able to apply displacements, rather than forces, in an adaptive fashion, that is, with the
possibility of updating the displacement loading pattern according to the structural properties of the model at each step of the analysis, then a conceptually appealing deformation-based nonlinear static analysis tool would be obtained. The present study focuses therefore on the
verification of the accuracy of such an innovative displacement-based adaptive pushover method (DAP), to estimate the response characteristics of vertically irregular frames subjected
to earthquake excitation.


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