Articles | Volume 18, issue 8
Nat. Hazards Earth Syst. Sci., 18, 2111–2125, 2018
https://doi.org/10.5194/nhess-18-2111-2018
Nat. Hazards Earth Syst. Sci., 18, 2111–2125, 2018
https://doi.org/10.5194/nhess-18-2111-2018

Research article 08 Aug 2018

Research article | 08 Aug 2018

Development of fragility curves for road bridges exposed to volcanic lahars

Joaquín Dagá et al.

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Cited articles

AASHTO: American Association of State Highway and Transportation Officials: LRFD bridge design specifications, AASHTO, Washington D.C., USA, 2012. 
Arneson, L., Zevenbergen, L., Lagasse, P., and Clopper, P.: Evaluating scour at bridges: Hydraulic Engineering Circular No. 18, Federal Highway Administration Publications, Washington D.C., USA, 2012. 
Blong, R. J.: Volcanic hazards: a sourcebook on the effects of eruptions, Academic Press, Sidney, Australia, 1984. 
Bono, L.: Modelación de los lahares del Volcán Villarrica en el sector de Pucón, Región de la Araucanía, Memoria de Título, Universidad de Chile, Santiago, Chile, 2014. 
Breusers, H., Nicollet, G., and Shen, H.: Local scour around cylindrical piers, J. Hydraul. Res., 15, 211–252, 1977. 
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Short summary
One of the main volcanic processes affecting road bridges are lahars, which are flows of water and volcanic material running down the slopes of a volcano. In this paper, bridge failure models due to lahars are proposed and, based on these, fragility curves are developed. Fragility curves are parameterized by maximum likelihood estimation, assuming a cumulative log-normal distribution. Bridge failure models are empirically evaluated using data of 15 bridges that were affected by lahars.
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