Energy-Based Seismic Design Method for EBFs Based on Hysteretic Energy Spectra and Accumulated Ductility Ratio Spectra

In the case of far field earthquakes, structural failure often results from accumulated damage caused by cyclic effects and gradual accumulation of energy. This paper proposes an energy-based seismic design method for steel eccentrically braced frames (EBFs) with two shear links at every story accor...

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Bibliographic Details
Published in:Advances in civil engineering 2019, Vol.2019 (2019), p.1-11
Main Author: Ma, Cuiling
Format: Article
Language:English
Subjects:
Civil engineering
Columns (structural)
Damage accumulation
Design
Ductility
Earthquake damage
Earthquakes
Eccentric bracing
Energy
Energy dissipation
Energy spectra
Hysteresis
Links
Mathematical problems
Methods
Nonlinear analysis
Reliability analysis
Seismic design
Seismic response
Soil classification
Steel frames
Steel structures
Structural failure
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Summary:In the case of far field earthquakes, structural failure often results from accumulated damage caused by cyclic effects and gradual accumulation of energy. This paper proposes an energy-based seismic design method for steel eccentrically braced frames (EBFs) with two shear links at every story according to the energy balance concept. The proposed method is theoretically supported by hysteretic energy spectra and accumulated ductility ratio spectra according to the Chinese soil classification. Furthermore, the method can be used to clarify the relationship between cumulative hysteretic energy and one-way pushover energy. For developing the method, it is assumed that all the hysteretic energy is dissipated by the shear links, column bases, and beam ends of the frames at both sides. Therefore, the parts outside the links, including beam segments, braces, and columns, are specially designed to perform elastically during an earthquake. Furthermore, a V-scheme steel EBF with ten stories and three spans is designed. The seismic performances of the designed structure, such as story drift and energy dissipation, are evaluated by nonlinear static analysis and time-history analysis. Finally, the reliability and accuracy of the proposed seismic design method are validated.
ISSN:1687-8086
1687-8094
DOI:10.1155/2019/3180596