Hurricane Vulnerability of Coastal Bridges Using Multiple Environmental Parameters

Hurricane Vulnerability of Coastal Bridges Using Multiple Environmental Parameters

M.G. Chorzepa A. Saeidpour J.K. Christian S.A. Durham  

The University of Georgia, USA

31 March 2016
| Citation



Hurricanes and other severe storms have proven themselves to be one of the major threats to transportation assets throughout the world, particularly to bridges located along coastal areas. Bridges as key components of transportation networks have shown to be vulnerable to hurricane-induced wave and surge forces. A large number of bridges along the U.S. Gulf coast suffered severe damage from recent hurricanes. Current risk-assessment practices include the fragility analysis of bridges based on a single hazard intensity parameter such as peak ground acceleration. However, this study investigates the vulnerability of highway bridges against hurricanes for multiple hazard parameters, not including the risk of substructure failure due to scour and/or erosion. The proposed hurricane vulnerability assessment methodology is applied to bridges along the surge-prone coastal regions of the state of Georgia. The surge-prone region is identified by the USGS SLOSH maps, and vulnerable bridges are selected based on the available NBI database. Nonlinear bridge models have been developed to apply a time history of wave loading as a function of the wind speed and storm water depth. Different combinations of bridge geometric and material parameters are generated to develop meta-models which cover a wide range of bridge configurations and wave/surge loads. This study yields a fragility function which describes the probability of failure for vulnerable bridges in terms of two environmental parameters: wind speed and storm water depth. The findings of this study will ultimately be beneficial to policy makers prioritizing recovery efforts and allocation of essential resources.


 bridge, environmental parameters, fragility, Hurricane, metamodel, surge, SVM, vulnerability, wave


[1] Douglass, S.L., Hughes, S., Rogers, S. & Chen, Q., The impact of Hurricane Ivan on the coastal roads of Florida and Alabama. A preliminary report. Rep. to Coastal Transportation Engineering Research and Education Center, Mobile, AL, 2004.

[2] Padgett, J., DesRoches, R., Nielson, B., Yashinsky, M., Kwon, O.S., Burdette, N. & Taver, E., Bridge damage and repair costs from Hurricane Katrina. Journal of Bridge Engineering, 13(1), pp. 6–14, 2008.

[3] Douglass, S.L. & Krolak, J., Highways in the Coastal Environment, FHWA, pp. 7–12, 2008.

[4] Gutierrez, C.M., Cresanti, R. & Jeffrey, W.A., Performance of physical structures in Hurricane Katrina and Hurricane Rita: A reconnaissance report, NIST Technical Note, USA, 2006.

[5] Basöz, N. & Kiremidjian, A.S., Development of empirical fragility curves for bridges. Proceedings of 5th U.S. Conference on Lifeline Earthquake Engineering, ASCE:  Seatle, pp. 693–702, 1999.

[6] Karim, K.R. & Yamazaki, F., A simplified method of constructing fragility curves for highway bridges. Earthquake Engineering & Structural Dynamics, 32(10), pp.  1603–1626, 2003.

[7] Zhang, J. & Huo, Y., Evaluating effectiveness and optimum design of isolation devices for highway bridges using the fragility function method. Engineering Structures, 31(8), pp. 1648–1660, 2009.

[8] Ataei, N., Vulnerability assessment of coastal bridges subjected to hurricane events, Doctoral dissertation, Rice University, Houston, 2013.

[9] Ataei, N. & Padgett, J.E., Probabilistic modeling of bridge deck unseating during hurricane events. Journal of Bridge Engineering, 18(4), pp. 275–286, 2012.

[10] Ataei, N., Stearns, M. & Padgett, J., Response sensitivity for probabilistic damage assessment of coastal bridges under surge and wave loading. Transportation Research Record: Journal of the Transportation Research Board, (2202), pp. 93–101, 2010.

[11] Kameshwar, S. & Padgett, J.E., Multi-hazard risk assessment of highway bridges subjected to earthquake and hurricane hazards. Engineering Structures, 78, pp. 154–166, 2014.

[12] Cauffman, S.A., Performance of Physical Structures in Hurricane Katrina &  Hurricane Rita: A Reconnaissance Report, DIANE Publishing, 2006.

[13] Robertson, I.N., Yim, S., Riggs, H.R. & Young, Y.L., Coastal bridge performance during Hurricane Katrina. Proceedings of the Third International Conference on Structural Engineering, Mechanics and Computation, Elsevier: Cape Town, pp. 1864–1870, 2007.

[14] Stearns, M. & Padgett, J.E., Impact of 2008 Hurricane Ike on bridge infrastructure in the Houston/Galveston region. Journal of Performance of Constructed Facilities, 26(4), pp. 441–452, 2011.

[15] Bea, R.G., Iversen, R. & Xu, T., Wave-in-deck forces on offshore platforms. Journal of Offshore Mechanics and Arctic Engineering, 123(1), pp. 10–21, 2001.

[16] Bea, R.G., Xu, T., Stear, J. & Ramos, R., Wave forces on decks of offshore platforms. Journal of Waterway, Port, Coastal, and Ocean Engineering, 125(3), pp. 136–144, 1999.

[17] French, J.A., Wave uplift pressures on horizontal platforms, Technical report, California Institute of Technology, 1969.

[18] Kaplan, P., Murray, J.J. & Yu, W.C., Theoretical analysis of wave impact forces on platform deck structures. Proceedings of the 14th International Conference on Offshore Mechanics & Arctic Engineering, ASME: Copenhagen, pp. 190–198, 1995.

[19] Marin, J. & Sheppard, D.M., Storm surge and wave loading on bridge superstructures. 

Proceedings of the Structures Congress 2009, ASCE: Austin, pp. 1–10, 2009.

[20] AASHTO, Guide Specifications for Bridges Vulnerable to Coastal Storms, USA, 2008.

[21] Padgett, J.E., Nielson, B.G. & DesRoches, R., Selection of optimal intensity measures in probabilistic seismic demand models of highway bridge portfolios. Earthquake Engineering and Structural Dynamics, 37(5), pp. 711–726, 2008.

[22] Nielson, B.G. & DesRoches, R., Seismic fragility methodology for highway bridges using a component level approach. Earthquake Engineering and Structural Dynamics, 36(6), pp. 823–829, 2007.

[23] Padgett, J.E. & DesRoches, R., Methodology for the development of analytical fragility curves for retrofitted bridges. Earthquake Engineering and Structural Dynamics, 37(8), pp. 1157–1174, 2008.

[24] Tavares, D.H., Suescun, J.R., Paultre, P. & Padgett, J.E., Seismic fragility of a highway bridge in quebec. Journal of Bridge Engineering, 18(11), pp. 1131–1139, 2013.