A simplified approach for seismic calculation of a tall building braced by shear walls and thin-walled open section structures

Meftah, Sid Ahmed; Tounsi, Abdelouahed; Abbas, Adda Bedia El

doi:10.1016/j.engstruct.2006.12.014

Cited by 27 publications

(11 citation statements)

References 12 publications

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“…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].…”

Section: Introductionmentioning

confidence: 99%

“…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].…”

Section: Introductionmentioning

confidence: 99%

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

Brunesi¹,

Nascimbene²,

Rassati³

et al. 2015

Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Brunesi¹,

Nascimbene²,

Rassati³

et al. 2015

Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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show abstract

“…Moreover, other simplified methods can be applied in cases where the vertical stiffening structures are constituted by frames [22,23], or by open shear walls [24]. In the literature there are also simplified methods for the dynamic analysis of tall buildings that involve the use of analytical [25,26] or FE models [27].…”

Section: Introductionmentioning

confidence: 99%

Open and closed shear-walls in high-rise structural systems: Static and dynamic analysis

Carpinteri

Lacidogna

Nitti

2016

Curved and Layered Structures

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Abstract:In the present paper, a General Algorithm is applied to the analysis of high-rise structures. This algorithm is to be used as a calculation tool in preliminary design; it allows to define the interaction between closed and open, straight or curved shear-walls, and the forces exchanged in structures subject to mainly horizontal loads. The analysis can be performed in both static and dynamic regimes, the mode shapes and the natural frequencies being assessed. This general formulation allows analyses of high-rise structures by taking into account the torsional rigidity and the warping deformations of the elements composing the building without gross simplifications. In this way it is possible to model the structure as a single equivalent cantilever, thus minimising the degrees of freedom of the system, and consequently the calculation time. Finally, potentials of the method proposed are demonstrated by a numerical example which emphasizes the link between global displacements and stresses in the elements composing the structure.

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“…Luco and Cornell [30] developed a simplified model involving the interconnection of two shear beams to predict the seismic performance of tall buildings. Maftah et al [31] presented a simplified approach for the seismic analysis of a tall building braced by shear walls and thin-walled open section structures, and a simplified formulation for the vibrational frequencies and internal forces subjected to earthquakes was obtained based on D'Alembert's principle. An important achievement in the simplified modeling of super-tall buildings was accomplished by Lu et al [32]; specifically, a two-dimensional (2D) simplified model encompassing nonlinear beam-column elements and nonlinear spring elements for the Shanghai Tower (H = 632 m) was proposed.…”

Section: Introductionmentioning

confidence: 99%

Development and application of a simplified model for the design of a super-tall mega-braced frame-core tube building

Xie

et al. 2016

Engineering Structures

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Abstract:Resilience-based earthquake design for next-generation super-tall buildings has become an important trend in earthquake engineering. Due to the complex structural system in super-tall buildings and the extreme computational workload produced when using refined finite element (FE) models to design such buildings, it is rather difficult to efficiently perform a comparison of different design schemes of super-tall buildings and to investigate the advantages and disadvantages of different designs. Here, a simplified nonlinear model is developed and applied to compare two design schemes (the fully braced scheme and half-braced scheme) of a super-tall mega-braced frame-core tube building, which is an actual engineering project with a total height of approximately 540 m. The accuracy of the simplified model is validated through a comparison of the results of modal analyses, static analyses, and dynamic time history analyses using the refined FE models. Subsequently, the plastic energy dissipation of different components and the distribution of the total plastic energy dissipation over the height of the two design schemes are compared using the proposed simplified model. The analyses indicate that the fully braced scheme is superior because of its more uniform energy distribution along the building height and the large amount of energy dissipated in the replaceable coupling beams, which enables rapid repair and re-occupancy after an earthquake. In contrast, the potential damage in the half-braced scheme is more concentrated and more severe, and the damage in the core tubes is difficult to repair after an earthquake.

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A simplified approach for seismic calculation of a tall building braced by shear walls and thin-walled open section structures

Cited by 27 publications

References 12 publications

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

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

Open and closed shear-walls in high-rise structural systems: Static and dynamic analysis

Development and application of a simplified model for the design of a super-tall mega-braced frame-core tube building

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