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Title |
Fragility Analyses on Seismic Isolated LRB Concrete Bridges
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Keywords |
Seismic isolated ; Fragility curve ; Damage state ; UncertaintyEarthquake analysis ; 면진 ; 손상도 곡선 ; 손상등급 ; 불확실성 ; 지진해석 |
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Abstract |
In performing a risk analysis of structures under earthquakes, it is imperative to identify the vulnerability of structures associated with various damage stages considering structural properties, soil-structure interactions, site condition, and so on. In this paper, the method to derive a representative fragility curve of seismic isolated LRB(lead rubber bearing) bridges is proposed. In which, the curve is assumed log-normally distribution with two parameters. The risk analysis of seismic isolated LRB bridges considering earthquake effects such as PGA, PGV, SA, SV, and SI is also performed to assure the earthquake resisting capability of the structures. An practical way for constructing the representative fragility curves is also recommended combining fragility curves of structures.
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