Direct displacement-based seismic design of steel eccentrically braced frame structures

Sullivan, Timothy J.

doi:10.1007/s10518-013-9486-8

Cited by 48 publications

(36 citation statements)

References 15 publications

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“…Similarly, an equivalent idealization developed along the lines of classical mechanical/component approach [22][23][24][25] is used to incorporate the cyclic behaviour of bolted joints. A classical displacement/rotation-based convergence criterion, with a threshold set equal to 10 -3 was adopted for the series of NLTHAs performed by assuming an auto-update integration time-step of the order of one-tenth of the time sampling of the ground motions considered [18,19]. In particular, a set of ten natural records scaled to obtain displacement spectrum compatibility according to EC8 requirements [17] was selected herein; type 1 spectrum with a PGA of 0.4g and soil type C with T D equal to 8s were the prevailing criteria for this suite.…”

Section: Modeling Approach and Seismic Inputmentioning

confidence: 99%

“…In particular, a set of ten natural records scaled to obtain displacement spectrum compatibility according to EC8 requirements [17] was selected herein; type 1 spectrum with a PGA of 0.4g and soil type C with T D equal to 8s were the prevailing criteria for this suite. Further and more comprehensive information may be found in [18,19].…”

Section: Modeling Approach and Seismic Inputmentioning

confidence: 99%

“…First, two reference prototypes, the geometric characteristics of which are summarized in the following, have been designed according to current European prescriptions [17], using response spectrum analysis (RSA), and then fiber-based models have been prepared to examine their nonlinear dynamic response using a set of natural ground motions scaled to obtain displacement spectrum compatibility in accordance with EC8 requirements [18,19].…”

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: Modeling Approach and Seismic Inputmentioning

confidence: 99%

Section: Modeling Approach and Seismic Inputmentioning

confidence: 99%

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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“…Firststage modelling aimed to reproduce nonlinear fibre-based simulations of the building casestudyies, subjected to NLTHAs deriving from a set of ten natural records [34,35]. These accelerograms (EQs) were spectrum-compatible in displacement according to EC8 prescriptions [25], selected a Type 1 spectrum with PGA equal to 0.4g, soil Type C and T D =8s (Figure 4).…”

Section: Finite Element Modelling Approachmentioning

confidence: 99%

Dissipating Effect of Glazed Curtain Wall Stick System Installed on High-Rise Mega-Braced Frame-Core Buildings Under Nonlinear Seismic Excitation

Casagrande¹,

Bonati²,

Auricchio³

et al. 2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Abstract. The results derived from the investigation on the dynamic behavior of glazed curtain wall non-structural stick systems installed in modern high-rise mega-frame prototypes is herein summarized. The supporting steel structures, designed in accordance with European rules, consisted of planar frames extracted from reference three-dimensional steel Moment Resisting Frame (MRF), respectively having thirty-and sixty-storey height. To limit interstorey drift and second order effects, outriggers trusses were placed every fifteen stories, whilst a CBF system was chosen as internal core. The characterization of non-structural façade elements was performed through experimental full-scale crescendo-tests on aluminium/glass curtain wall units. Deriving experimental force-displacement curves, it was possible to calibrate threedimensional inelastic FE models, capable to simulate the interaction between glass panels and aluminium frame. Subsequently, equivalent nonlinear links were calibrated to reproduce the dynamic behaviour of tested glazed unit, and implemented in the thirty-and sixty-storey structural planar frames FE models. Nonlinear time history analyses (NLTHAs) were performed to quantify local and global performance, investigating the enhanced combination of stiffness and strength generated through the implementation of glazed curtain wall on the numerical FE models. Results will be shown in terms of inter-storey drift profiles and displacement peaks, axial force curves and percentage peak variation, showing the sensitivity to the structure height. Trends were discussed to show that, if accurately designed, omitting non-structural elements from the seismic assessment of high-rise prototypes conduct to a sensible underestimation of dynamic dissipation capacity of the building.

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“…While extensive research has been undertaken in order to allow for the method to be applicable to a wide range of structural types and materials (e.g. García et al 2010;Maley et al 2010;Pennucci et al 2009;Sullivan 2009Sullivan , 2013aSullivan and Lago 2012), there are still some areas that require further study and development. In particular, the DDBD method does not appear to have been applied, to date, to the case of steel moment resisting frame structures with setbacks, that is, moment resisting frames with abrupt changes in floor area that occur at one or more levels of the building's height.…”

Section: Introductionmentioning

confidence: 99%

Applicability of the direct displacement-based design method to steel moment resisting frames with setbacks

Nievas

Sullivan

2015

Bull Earthquake Eng

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While quite extensive research has been undertaken during the last decades to extend the direct displacement-based design (DDBD) method to a wide range of structural types and materials, it is recognized that there are still some areas requiring further study and development. Steel structures and, more specifically, steel moment resisting frames with setbacks are one of these and, therefore, this work aims to investigate the seismic response of such structures designed according to the DDBD procedure currently prescribed for regular frames and to elaborate specific recommendations based on the results obtained. The main aspects to be considered are the adequacy of the displacement profile and higher mode reduction factor to be used, as well as the suitable strength distribution required. In a trial application of the current DDBD procedure, two two-dimensional 12-storey frames with setbacks are designed, and the solutions obtained are used to develop models of the structures, which are then subject to a series of non-linear time-history analyses at increasing levels of intensity, using spectrum-compatible scaled accelerograms. The results obtained are contrasted with those of Karavasilis et al. (J Constr Steel Res 64:644-654, 2008), which were developed for steel frames designed via code methods. It is recognized that the DDBD method can benefit from the expressions developed by these authors, and recommendations for the adjustment of the DDBD higher mode reduction factors are subsequently proposed. The efficacy of the latter is evaluated by the design and verification at a range of diverse intensities of a set of two-dimensional frames of 6, 9 and 12 storeys, and satisfactory outcomes are obtained. These results have been fundamental in revealing the need for future research regarding the influence of the design spectral shapes, ductility demand and P-Delta instability in the dynamic amplification of drifts due to higher mode effects.

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Direct displacement-based seismic design of steel eccentrically braced frame structures

Cited by 48 publications

References 15 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

Dissipating Effect of Glazed Curtain Wall Stick System Installed on High-Rise Mega-Braced Frame-Core Buildings Under Nonlinear Seismic Excitation

Applicability of the direct displacement-based design method to steel moment resisting frames with setbacks

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