Quantification of seismic performance factors of the buildings consisting of disposable knee bracing frames

Nobahar, Elnaz; Farahi, Mojtaba; Mofid, Massood

doi:10.1016/j.jcsr.2016.05.007

Cited by 16 publications

(5 citation statements)

References 16 publications

(17 reference statements)

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“…where, Vmax and V are the maximum base shear and design base shear, respectively μT = , (4) where, δu is ultimate roof displacement corresponding to the 80% of maximum base shear (0.8Vmax) and δy,eff is the effective yield roof displacement calculated as:…”

Section: Nonlinear Static (Pushover) Analysesmentioning

confidence: 99%

Evaluation of Seismic Performance Factors for Concrete Filled Steel Tube Diagrid Structural System

Mehtani

Patel

2022

ASPS Conf. Proc.

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Seismic performance factors are used in current building codes and standards to estimate strength and deformation demands on seismic force resisting systems that are designed using linear methods of analysis, but are responding in the nonlinear range. Many recently evolved seismic force resisting systems have never been subjected to any signi?cant level of earthquake ground shaking. As a result, the seismic response characteristics of many systems, and their ability to meet seismic design performance objectives, are both untested and unknown. Therefore, it is necessary to determine the seismic performance factors of new seismic force resisting systems proposed for inclusion in building codes that will result in equivalent safety against collapse during an earthquake when properly implemented in the seismic design process. In this study, the response modification factor, overstrength factor and period based ductility for concrete filled steel tube (CFST) diagrid structural system are evaluated. To quantify these factors, the rational procedure introduced in Federal Emergency Management Agency (FEMA) P695, which is based on low probability of structural collapse and encompasses nonlinear static and dynamic analyses, is used. To this end, performance group consisting of 4, 8, 16 and 24 storey diagrid structures with 50° angle of external braces is considered. Nonlinear static analyses are performed to obtain overstrength factor and period?based ductility. Incremental dynamic analyses are then performed to assess collapse margin ratio of the archetypes. For modelling and numerical analysis, Open System for Earthquake Engineering Simulation (OpenSees), an open source software is used.

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Section: Nonlinear Static (Pushover) Analysesmentioning

confidence: 99%

Evaluation of Seismic Performance Factors for Concrete Filled Steel Tube Diagrid Structural System

Mehtani

Patel

2022

ASPS Conf. Proc.

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“…For this purpose, FEMA P695 suggests to perform pushover analyses for a variety of structures to obtain the over-strength factor Ω 0 . It also suggests to performe some IDA analyses to calculate the response modification factor, R. Some researchers have used the methodology of FEMA P695 (referred to herein as the Methodology) to quantify the seismic performance factors for different seismic action resisting systems [17][18][19][20][21][22][23][24][25][26]27].…”

Section: Review Of Previous Researchmentioning

confidence: 99%

Quantification of seismic performance factors of self-centered y-shaped braced frames

Shahiditabar

Moharrami

Snijder

2022

Journal of Constructional Steel Research

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“…In summary, the results showed that although low-to -midrise structures designed with response spectrum analysis met the collapse criteria with considerable safety, long period structures failed to satisfy these criteria. Also in recent years, some scholars employed this methodology to assess and quantify SPFs of conventional structural systems [18][19][20][21][22][23][24][25].…”

Section: Sn Applied Sciencesmentioning

confidence: 99%

FEMA P695 methodology for safety margin evaluation of steel moment resisting frames subjected to near-field and far-field records

2021

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This study presents the impact of near-field and far-field earthquakes on the seismic design of Intermediate Moment Resisting Frame (IMRF) and Special Moment Resisting Frame (SMRF) structures through FEMA (Federal Emergency Management Agency) P695 methodology to highlight the importance of probabilistic collapse as well as seismic performance factors of these structures. The purpose of this study is to investigate the collapse performance of steel intermediate and special moment resisting frame systems as the most common structural systems in urban areas in order to assess the seismic performance factors used for the design using nonlinear static and dynamic analysis methods. In this regard, as the representatives of low-rise to high-rise buildings, archetypes with 5-, 10- and 15- story of intermediate and special moment resisting frames are designed and then the nonlinear models are developed in OpenSees software. Nonlinear static analyses are performed to assess the overstrength and ductility of these systems. The effects of near-field and far-field ground motions on these frames are investigated through incremental dynamic analysis. These analyses are performed with 22 far-field and 20 near-field ground motion records using FEMA P695 methodology. The results show that near-field earthquakes have serious impacts on the collapse probability of structures. The superiority of special moment resisting frame over intermediate moment resisting frame is quantified in terms of safety margin and median collapse capacity under both near-field and far-field earthquakes. Finally, the results indicate that the response modification factors introduced in seismic design code are acceptable for intermediate moment resisting frame and special moment resisting frame under far-field ground motions. However, in the near-field sites while SMRF system meets the requirements of FEMA P695 methodology, the IMRF system does not satisfy these criteria.

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Quantification of seismic performance factors of the buildings consisting of disposable knee bracing frames

Cited by 16 publications

References 16 publications

Evaluation of Seismic Performance Factors for Concrete Filled Steel Tube Diagrid Structural System

Evaluation of Seismic Performance Factors for Concrete Filled Steel Tube Diagrid Structural System

Quantification of seismic performance factors of self-centered y-shaped braced frames

FEMA P695 methodology for safety margin evaluation of steel moment resisting frames subjected to near-field and far-field records

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