A consecutive modal pushover procedure for nonlinear static analysis of one-way unsymmetric-plan tall building structures

Seismic Performance of High-Rise Steel MRFS With Outrigger and Belt Trusses Through Nonlinear Dynamic Fe Simulations

“…Scaled shaking table tests [15,16] are at the moment promising analysis techniques for research applications but they are not so easily applicable for design office use. Therefore, high-definition or simplified finite element (FE) idealizations still represent an attractive tool to explore the seismic performance of these complex structural systems, as proposed by a number of research efforts available in literature on that subject [1][2][3][4][5][6][7][8][9][10][11]. If early studies [5][6][7][8][9][10][11] introduced simplifications in either FE representation or analysis technique, significant improvements have been more recently achieved [1][2][3][4].…”

“…Such buildings have a complicated structural system consisting of hundreds of different components, including those with complex features and large dimensions. When compared to medium-and low-rise buildings, tall moment resisting frame (MRF) structural systems present several distinctive characteristics in their behavior and peculiar aspects in their design, such as long periods and higher mode effects [1][2][3][4][5][6][7][8][9][10][11]. To ensure safe and economic design, construction and operation under various extreme loading conditions in particular earthquake events, detailed studies are required to predict their response, being the majority of current seismic Standards often unsuitable for them [12][13][14].…”

The modified and extended upper-bound (UB) pushover method for the multi-mode pushover analysis of unsymmetric-plan tall buildings

“…In the case of torsionally-flexible systems, an inverted triangular or a uniform load pattern is not able to account for the dynamic behavior of the structure in a conventional pushover analysis [21]. For these systems, the dynamic behavior can be considered by using the fundamental effective mode in the conventional pushover analysis.…”

“…Over the past decade, several efforts have been made to extend pushover analysis methods to unsymmetric-plan 3D building structures taking torsional effects into account. Modal pushover analysis (MPA) [8,23,24], consecutive modal pushover (CMP) procedure [21,22], the extended N2 [17], adaptive modal pushover procedure [27] and generalized force vectors method [15] were extended to unsymmetric-plan building structures in which the effect of higher modes in both elevation and plan (torsion) was taken into consideration.…”

A variant of modal pushover analyses (VMPA) based on a non-incremental procedure

“…Poursha et al (2009) proposed a consecutive modal pushover procedure (CMP) for seismic assessment of tall buildings, in which the modal pushover analyses are implemented consecutively using lateral force patterns compatible with linear-elastic mode shapes. The procedure was applied to asymmetric tall buildings by Poursha et al (2011). Khoshnoudian and Kashani (2012) introduced modified consecutive modal pushover analysis (MCMP), which is based on some modifications to CMP.…”