A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation of Uncertainties Associated with Design of Highway Bridges Considering the Effects of Scouring and Earthquake
This paper studies the uncertainties associated with design of reinforced concrete highway bridges under combined effects of scouring and earthquake. The extent of scouring effects on a bridge spanning a waterway is usually characterized by the scour depth. The models suggested for the estimation of scour depth are reviewed in the current study and the uncertainties inherent in their parameters are discussed. To obtain a realistic prediction of scour depth, two rivers located in the Southern and Northern California are selected. Considering the flow discharge rates of rivers in addition to the other sources of uncertainty, risk curves are developed to indicate the probability of exceeding any specific level of scour depth at the bridge location. A group of case-study bridges are modeled to evaluate the structural capacity and seismic response of bridges after degradation due to the various scour scenarios. The developed seismic fragility curves show that the probability of exceeding a damage state may significantly change by assuming scour depths with different occurrence probabilities and this variation should be considered during the bridge design process.
Evaluation of Uncertainties Associated with Design of Highway Bridges Considering the Effects of Scouring and Earthquake
This paper studies the uncertainties associated with design of reinforced concrete highway bridges under combined effects of scouring and earthquake. The extent of scouring effects on a bridge spanning a waterway is usually characterized by the scour depth. The models suggested for the estimation of scour depth are reviewed in the current study and the uncertainties inherent in their parameters are discussed. To obtain a realistic prediction of scour depth, two rivers located in the Southern and Northern California are selected. Considering the flow discharge rates of rivers in addition to the other sources of uncertainty, risk curves are developed to indicate the probability of exceeding any specific level of scour depth at the bridge location. A group of case-study bridges are modeled to evaluate the structural capacity and seismic response of bridges after degradation due to the various scour scenarios. The developed seismic fragility curves show that the probability of exceeding a damage state may significantly change by assuming scour depths with different occurrence probabilities and this variation should be considered during the bridge design process.
Evaluation of Uncertainties Associated with Design of Highway Bridges Considering the Effects of Scouring and Earthquake
Alipour, A. (author) / Shafei, B. (author) / Shinozuka, M. (author)
Structures Congress 2010 ; 2010 ; Orlando, Florida, United States
Structures Congress 2010 ; 288-297
2010-05-18
Conference paper
Electronic Resource
English
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