Life-cycle seismic damage identification and components damage sequences prediction for cable-stayed bridge based on fragility analyses

Time-Dependent Seismic Fragility of Typical Concrete Girder Bridges under Chloride-Induced Corrosion

“…Then, the time-dependent area of a corroding longitudinal bar can be expressed as Equation (11), where A S (0) is the initial area of longitudinal reinforcement and η S (t) is the loss rate of a longitudinal bar. The time-dependent area of a corroding stirrup can be expressed in Equation ( 12), where a s (0) is the initial area of a stirrup and λ k (t) is the loss rate of a stirrup.…”

“…Dey and Sil [ 10 ] proposed performing seismic fragility analysis of corrosion-affected bridges located in the coastal region of India by considering pitting corrosion as a realistic corrosion degradation mechanism. Fu et al [ 11 ] developed a life-cycle fragility assessment method to establish the time-dependent seismic fragility curves of an illustrative cable-stayed bridge at the component and system levels. Fan et al [ 12 ] established a fragility analysis framework for RC bridge structures subjected to the multi-hazard effect of vessel collisions and corrosion.…”

“…According to China’s Ministry of Transportation, the aging and deterioration phenomenon of MSC concrete girder bridges are commonly found in seismic zones, such as northern China, because deicing salts are extensively used on highway bridges [ 24 ]. The existing contributions [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ] also indicated that RC bridges subjected to the mechanisms of corrosion deterioration might be more vulnerable to earthquake hazards. Moreover, since previous studies [ 25 , 26 ] demonstrated that chloride from deicing salts can cause more degradation of bridges than that in a marine environment, the impacts of corrosion degradation due to chloride-laden deicing salts should be researched in detail.…”