Drift-based and dual-parameter fragility curves for concentrically braced frames in seismic regions
| Autor: | Dimitrios G. Lignos, Emre Karamanci |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Steel braces
Drift-based fragility curves business.industry Metals and Alloys Building and Construction Strength loss Structural engineering Damage states Brace Rapid assessment Fragility Rapid earthquake damage assessment Buckling Mechanics of Materials Fracture ductility Fracture (geology) Cyclic loading Geotechnical engineering Ductility business Dual-parameter fragilities Geology Civil and Structural Engineering |
| Zdroj: | Journal of Constructional Steel Research. 90:209-220 |
| ISSN: | 0143-974X |
| DOI: | 10.1016/j.jcsr.2013.07.034 |
| Popis: | This paper discusses the development of drift-based and dual-parameter fragility curves for steel braces as part of concentrically braced frames designed in seismic regions. The experimental results from 24 different research programs are compiled into a database for this effort. Drift-based fragility curves are developed for three damage states of steel braces subjected to cyclic loading associated with brace flexural buckling, local buckling and brace strength loss due to fracture. The effects of material variability, brace cross sectional shape and loading protocol on the drift-based fragility curves are investigated. The effect of global and local slenderness ratios on the fracture ductility of various shapes of steel braces is examined through dual-parameter fragility curves that relate these geometric ratios with the expected story drift ratios that each of the three pre-described damage states occur. The proposed fragility curves can be employed for rapid assessment of the seismic vulnerability of concentrically braced frames. © 2013 Elsevier Ltd. |
| Databáze: | OpenAIRE |
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