A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The modified and extended upper-bound (UB) pushover method for the multi-mode pushover analysis of unsymmetric-plan tall buildings
Abstract Upper-bound (UB) pushover analysis method, which was proposed to consider the effect of higher modes for two-dimensional (2D) tall building frames, underestimates the seismic demands at the lower storeys. In this study, the limitation of the method is resolved by combining the seismic demands resulting from the upper-bound pushover method and a conventional pushover analysis that the latter controls the seismic demands at the lower storeys. Furthermore, the main aim of this study is the extension of the upper-bound pushover analysis method to unsymmetric-plan tall buildings to take torsional effects into account. The extension is carried out based on the use of upper-bound lateral forces with different patterns for various unsymmetric-plan tall buildings. The upper-bound of the contribution ratio of higher modes is considered in computing the upper-bound lateral forces. The results elucidate that the extended method can predict to a reasonable accuracy the inelastic seismic demands of unsymmetic-plan tall buildings.
Highlights Upper-bound (UB) pushover analysis is modified for planar tall building frames. The upper-bound pushover analysis is extended to unsymmetric-plan tall buildings. The upper-bound of the contribution ratio of higher modes is considered. The extended method can predict to a reasonable accuracy the inelastic seismic demands.
The modified and extended upper-bound (UB) pushover method for the multi-mode pushover analysis of unsymmetric-plan tall buildings
Abstract Upper-bound (UB) pushover analysis method, which was proposed to consider the effect of higher modes for two-dimensional (2D) tall building frames, underestimates the seismic demands at the lower storeys. In this study, the limitation of the method is resolved by combining the seismic demands resulting from the upper-bound pushover method and a conventional pushover analysis that the latter controls the seismic demands at the lower storeys. Furthermore, the main aim of this study is the extension of the upper-bound pushover analysis method to unsymmetric-plan tall buildings to take torsional effects into account. The extension is carried out based on the use of upper-bound lateral forces with different patterns for various unsymmetric-plan tall buildings. The upper-bound of the contribution ratio of higher modes is considered in computing the upper-bound lateral forces. The results elucidate that the extended method can predict to a reasonable accuracy the inelastic seismic demands of unsymmetic-plan tall buildings.
Highlights Upper-bound (UB) pushover analysis is modified for planar tall building frames. The upper-bound pushover analysis is extended to unsymmetric-plan tall buildings. The upper-bound of the contribution ratio of higher modes is considered. The extended method can predict to a reasonable accuracy the inelastic seismic demands.
The modified and extended upper-bound (UB) pushover method for the multi-mode pushover analysis of unsymmetric-plan tall buildings
Poursha, Mehdi (author) / Samarin, Esmaiel Talebi (author)
Soil Dynamics and Earthquake Engineering ; 71 ; 114-127
2015-01-20
14 pages
Article (Journal)
Electronic Resource
English
Modal Pushover Analysis for Unsymmetric Buildings
| ASCE | 2005
Modal Pushover Analysis for Unsymmetric Buildings
| British Library Conference Proceedings | 2005
A pushover procedure for tall buildings
| British Library Conference Proceedings | 2002