Ultimate strength reliability analysis of corroded steel-box girder bridges |
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Authors: | Yasser Sharifi Jeom Kee Paik |
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Affiliation: | LRET Research Centre of Excellence, Pusan National University, Busan, Republic of Korea |
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Abstract: | Structural reliability theory is a useful tool for estimating the risks associated with deteriorating structures. The aim of this study is to develop and demonstrate a procedure for the assessment of box girder bridge ultimate strength reliability with the degradation of plate members due to general corrosion taken into account. A probabilistic model for ultimate steel-box girder strength is established on the basis of an analytic formula that considers corrosion-related, time-dependent strength degradation. The study involves the selection of representative structures, formulation of limit state functions, development of resistance models for corroded steel-box girders, development of load models, development of a reliability analysis method, reliability analysis of the selected bridges and development of the time-dependant reliability profiles, including deterioration due to corrosion. The results of this study can be used for the better prediction of the service life of deteriorating steel-box girder bridges and the development of optimal reliability-based maintenance strategies. |
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Keywords: | Bridges Reliability analysis Probabilistic model Steel-box girders Corrosion damage |
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