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Flood fragility analysis of instream bridges
Author(s): Touhid Ahamed; Jaeho Shim; Hongki Jo; Jennifer Duan
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Paper Abstract

Flood scour is one of the major causes of bridge failures in the United States. Flood fragility curves can be used as an objective tool to assess the risk of a bridge to exceed some limit-states for a given flood. Despite the method’s extensive use in seismic reliability analysis for civil infrastructures, the approach has rarely been utilized in evaluation of scour critical bridges. Flood fragility analysis of a instream bridge structure has been analyzed using first order reliability method. A MATLAB-based code has been developed to perform the analysis combining the first order reliability analysis tool of FERUM (Finite Element Reliability Analysis using MATLAB) and finite element structural analysis code ABAQUS. The developed code passes information back and forth between FERUM and ABAQUS in the iterative process to progress the analysis. Moreover, the code is capable of simulating scour depth, corresponding change in foundation parameter, variable limit-state for given inputs, which are realized by generating new finite element structural model each time FERUM calls ABAQUS. The proposed automated procedure has been demonstrated by deriving fragility curves, due to flood induced scour and stream water pressure, for a real bridge.

Paper Details

Date Published: 27 March 2018
PDF: 6 pages
Proc. SPIE 10598, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018, 1059826 (27 March 2018); doi: 10.1117/12.2296782
Show Author Affiliations
Touhid Ahamed, The Univ. of Arizona (United States)
Jaeho Shim, The Univ. of Arizona (United States)
Hongki Jo, The Univ. of Arizona (United States)
Jennifer Duan, The Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 10598:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018
Hoon Sohn, Editor(s)

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