Abstract
Steel-concrete composite structures that share the advantages of both steel structure and concrete structure have been developed rapidly and used widely. It has been a popular structure in high-rise buildings in recent years. Although more and more composite structures have been used in earthquake area, only a few literatures about fragility analysis of this type of structure are available. In this paper, a fragility analysis method based on performance is proposed, in which both the uncertainty due to variability in structures and ground motion are considered. Seismic fragility analysis is performed for a 15-story composite beam-concrete-filled square steel tube column frame by the proposed method. The top-drift-angle and the story-drift-angle are used as quantitative indexes to define the four different performance levels. Then seismic demand probability analysis is carried out and fragility curves are derived to assess the seismic performance of this type of structure.
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Liu, J., Liu, Y. & Liu, H. Seismic fragility analysis of composite frame structure based on performance. Earthq Sci 23, 45–52 (2010). https://doi.org/10.1007/s11589-009-0049-7
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DOI: https://doi.org/10.1007/s11589-009-0049-7