A Hybrid Seismic Design Method for Steel Irregular Space Moment Resisting Frames

Tzimas, Angelos S.; Skalomenos, Konstantinos A.; Beskos, D.E.

doi:10.1080/13632469.2020.1733140

Cited by 6 publications

(8 citation statements)

References 24 publications

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“…Frame). An observation of Figure 2 and the remaining ones in [10], reveals that the response of the frames is similar with a dispersion that increases slightly with the number of storeys.…”

Section: Space Frames Irregular In Plan View (Group A)mentioning

confidence: 74%

“…Figure 4 shows peak lateral storey displacements and IDR profiles in elevation of the 6-storey frames of Group C, for IDRmax = 1.8%. The remaining performance levels can be found in [10]. For comparison reasons, the responses of the corresponding regular frames (no | 2031 mass discontinuity and an accidental eccentricity of 5%) are also plotted in these figures (labeled as R).…”

Section: Space Frames With Mass Irregularity Along Their Height (Group C)mentioning

confidence: 99%

“…The frames of Group B have 3, 6 and 9 storeys with 3 bays in y direction. The geometrical irregularity introduced by setbacks is quantified through the Φs and Φb indices which according to Figure 2a can be taken from [10] …”

Section: Steel Irregular Space Framesmentioning

confidence: 99%

“…These equations show that the equal-displacement rule of EC8 [2] overestimates the peak floor displacements. Limitations of the above-mentioned equations and their comparison against the corresponding equations for planar frames can be found in [10].…”

mentioning

confidence: 99%

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A Damage‐Controlled Behavior Factor (EC8) for Seismic Design of Steel Irregular Space MRFs

Tzimas

Skalomenos²,

Beskos

2021

ce papers

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A main aspect to consider in seismic design of building structures according to EC8 is the selection of the behavior factor, q, which is directly related to the energy dissipation capacity of the structure. The prescribed values of q (1) are referred only to one limit state; (2) depend on the structural system and on the ductility class; (3) are constant; and (4) are not directly related to structural and non‐structural demands. Based on the literature, the inelastic seismic response of irregular building structures cannot be always estimated with safety by utilizing the methods of current seismic design codes. In this work, a preliminary performance‐based seismic design method which incorporates deformation‐controlled q factors, to better control the structural and non‐structural damage, is developed for space steel moment resisting frames irregular in plan view and in elevation within the framework of hybrid force/displacement (HFD) seismic design method. A large seismic response databank is generated on the basis of 88 space irregular MRFs, subjected to 42 pairs of ordinary ground motions, to develop the necessary empirical equations employed by the HFD. A realistic design example serves to demonstrate the advantages of the proposed method over the seismic design procedure of EC8.

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“…Frame). An observation of Figure 2 and the remaining ones in [10], reveals that the response of the frames is similar with a dispersion that increases slightly with the number of storeys.…”

Section: Space Frames Irregular In Plan View (Group A)mentioning

confidence: 74%

Section: Space Frames With Mass Irregularity Along Their Height (Group C)mentioning

confidence: 99%

Section: Steel Irregular Space Framesmentioning

confidence: 99%

mentioning

confidence: 99%

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A Damage‐Controlled Behavior Factor (EC8) for Seismic Design of Steel Irregular Space MRFs

Tzimas

Skalomenos²,

Beskos

2021

ce papers

Self Cite

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“…Vertical irregularities caused by changes in the dynamic properties of structures along their height, e.g., strength, stiffness, and mass, were referred in literature as nongeometric irregularities [24]. A large body of literature is also devoted to the impact of vertical irregularities on the seismic performance of structures [25][26][27][28][29]. Because of the existence of aesthetic consideration and city regulation, irregular configurations, in plan and elevation of buildings, are inevitable.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Effects of Vertical Mass Irregularity on Seismic Behavior of BRBFs and CBFs

Karami

Shahbazi²,

Kioumarsi

2020

Applied Sciences

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Today, architectural application and economic constraints require that vertical-irregular structures be constructed in urban areas. Proposing methods to minimize damage to these structures during earthquakes is therefore crucial. Strict regulations have been enforced for the design and analysis of irregular structures given their higher vulnerability to damage compared to that of regular structures. The present study aimed to evaluate eight regular and irregular 10-story and 15-story steel structures with buckling-restrained braces frames (BRBFs) and concentric braced frames (CBFs) in terms of their responses to twelve far-field earthquakes. According to the obtained results, the mean value of maximum drift, top floor displacement and floor acceleration were higher in both regular and irregular structures with BRBFs than in those with CBFs.

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Hybrid Force-Displacement Design

Papagiannopoulos

Hatzigeorgiou

Beskos

2021

Seismic Design Methods for Steel Building Structures

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A Hybrid Seismic Design Method for Steel Irregular Space Moment Resisting Frames

Cited by 6 publications

References 24 publications

A Damage‐Controlled Behavior Factor (EC8) for Seismic Design of Steel Irregular Space MRFs

A Damage‐Controlled Behavior Factor (EC8) for Seismic Design of Steel Irregular Space MRFs

A Study on the Effects of Vertical Mass Irregularity on Seismic Behavior of BRBFs and CBFs

Hybrid Force-Displacement Design

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