Abstract
AbstractIn the reliability assessment of a bridge in operation with regards to its ultimate limit state, it should be noted that the strengths of members and effects of traffic load vary continuous...
Highlights
Many countries have adopted reliability-based limit state design (LSD) and load and resistance factor design (LRFD) in their bridge design codes
This paper developed a framework for time-dependent reliability assessment and updating for prestressed concrete (PSC) box girder bridges over their service life based on the information of the traffic environment of the bridge and corrosion of prestressing strands
An iterative algorithm introducing a recently proposed stress-strain model of corroded wire was proposed for calculation of the flexural strength
Summary
Many countries have adopted reliability-based limit state design (LSD) and load and resistance factor design (LRFD) in their bridge design codes. These design approaches enable us to achieve the target level of reliability by using the estimated nominal values and the factors of the two main components (load and strength), which are defined based on the uncertainties in each component. Note that the load and strength keep varying over the lifespan of a bridge due to deterioration, changes in traffic environment, and structural damage. Under the ultimate limit state (ULS) in the bridge design codes, one needs to address large variability of the traffic load effect caused by various uncertainties in the traffic environment of the bridge. The failure to incorporate actual in-use condition of
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