Life-Cycle Risk Assessment of Spatially Distributed Aging Bridges under Seismic and Traffic Hazards

Earthquake Spectra - Tập 29 Số 1 - Trang 127-153 - 2013
Alberto Decò1, Dan M. Frangopol2
1Graduate Research Assistant, Department of Civil & Environmental Engineering, Engineering Research Center for Advanced Technology for Large Structural Systems (ATLSS), Lehigh University, Bethlehem, PA 18015-4729, USA
2Professor and the Fazlur R. Khan Endowed Chair of Structural Engineering and Architecture, Department of Civil & Environmental Engineering, Engineering Research Center for Advanced Technology for Large Structural Systems (ATLSS), Lehigh University, Bethlehem, PA 18015-4729, USA

Tóm tắt

This paper presents a rational framework for the quantitative assessment of life-cycle risk of bridges within a transportation network. Bridge vulnerability is evaluated with respect to seismic and abnormal traffic hazards. The effects induced by seismic hazard are investigated by means of fragility analysis. Random earthquakes are generated using Latin Hypercube sampling technique, and probabilities of exceeding specific structural damage states are computed for each specific seismic scenario. Traffic hazard is assessed considering Weibull distributed time-to-failure of the bridge superstructure. Epistemic and aleatory uncertainties are accounted for in order to provide a rational assessment of life-cycle risk. Consequence analysis includes different levels of bridge serviceability (fully serviceable, partly serviceable, closed, and collapsed), and monetary values are used to evaluate direct and indirect consequences. Seismic risk, traffic-induced risk, and total risk are evaluated for a group of existing bridges located north of the San Diego metropolitan area.

Từ khóa


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Earthquake Spectra

Tập 29 Số 1

127-153

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