Seismic evaluation of the aged high-pier and long-span bridges subjected to extremely halobiotic condition

Wu, Weitai; Li, L; Shao, Xiong; Hu, Sicong

doi:10.1201/b17063-314

Cited by 2 publications

(3 citation statements)

References 14 publications

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“…Steel 02 possesses an isotropic strain hardening property and accurately represents both the bi-directional Bauschinger effect and isotropic strengthening effect. In the works of Liang, Yan [10], Wu, Li [15], and Sung and Su [16], the calculations for the corrosion initiation time of the reinforcement, chloride ion concentration on the concrete surface, yield strength, and elastic modulus of reinforcement are provided as shown in Equations ( 7)- (12). For more details, the reader can refer to Yan, Liang [17], and Liang, Yan [10].…”

Section: Methodology 21 Time-dependent Deterioration Of Materialsmentioning

confidence: 99%

“…This method can comprehensively consider corresponding seismic records and accurately evaluate the seismic performance of structures under earthquakes. (4) Mixed fragility analysis methods: These methods combine two or more of the above three methods [1,15]. Quantitative methods based on expert opinion have high levels of uncertainty.…”

Section: Fragility Analysis Methods For Bearingmentioning

confidence: 99%

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Comparison of Damage Indexes for Assessing Seismic Fragility of Bearings in an Offshore Bridge

Yan

Guo

2023

Applied Sciences

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This study analyzes the applicability of different damage indexes for bearings, focusing on the time-dependent deterioration of materials and the time-dependent bond-slip behavior between steel and concrete caused by chloride erosion. First, the methodology is proposed, encompassing the time-dependent deterioration of materials, the time-dependent bond-slip behavior, the quantification of different damage indexes of the bearing, and the fragility analysis for the bearings. Next, an offshore bridge is used as an example to investigate the detailed elements of the components and the time-varying effects. Thereafter, based on incremental dynamic analysis and fragility analysis, the discussion focuses on the comparison of damage indexes for assessing the seismic fragility of bearings in an offshore bridge. This study indicates that if the relative displacement ductility ratio is adopted as the criterion, the coverage of PGA obtained by the theoretical method is 167% greater than that obtained using the empirical method, and the relative displacement ductility ratio, which incorporates the shear deformation of piers, is better aligned with the performance-based ductility design concept and offers better economy. Safety-based damage indexes are recommended for the bridge in seismic zones, while economy-based indexes can be used in favorable bridge environments.

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Section: Methodology 21 Time-dependent Deterioration Of Materialsmentioning

confidence: 99%

Section: Fragility Analysis Methods For Bearingmentioning

confidence: 99%

Comparison of Damage Indexes for Assessing Seismic Fragility of Bearings in an Offshore Bridge

Yan

Guo

2023

Applied Sciences

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“…Fick's second diffusion law [36] is often used to fit the process of steel bar corrosion affected by air composition in an offshore environment. Wu et al [37] stated that the related parameters will change with variations in time and the air environment, such as the initial time of steel corrosion (t init ), the chloride ion concentration on the concrete surface (C s ), and the critical chloride ion concentration on steel corrosion (C cr ). To some extent, these parameters can be regarded as random variables obeying normal distribution.…”

Section: Study On the Properties Of Corroded Steel Barsmentioning

confidence: 99%

Seismic Response Analysis of Pier considering Durability Damage Repair

Liang

Mao

et al. 2020

Advances in Civil Engineering

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At present, most of the research studies on the seismic performance of the durability degraded reinforced concrete structure only consider the influence of a single factor. This paper comprehensively considers the factors such as concrete carbonization, steel corrosion, and bond slip performance degradation caused by other durability factors and durability damage repair and studies the influence of the above factors on the seismic performance of bridge structures. Based on the finite element model considering the bond slip and the material parameters of time-varying durability damage, the seismic performance analysis model of the pier is established considering material durability damage repair in different service periods. Then, the effect of material durability damage repair on the seismic performance of the pier is examined. The results show that the displacement of the pier top increases, the curvature of the pier bottom decreases, and the moment-curvature curve pinching phenomenon is further evident when considering the bond slip. When considering the durability damage repair of materials, the curvature considerably decreases (the maximum value is approximately 16.04%) with the extension of the service time of the bridge, and the pier damage is substantially reduced.

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Seismic evaluation of the aged high-pier and long-span bridges subjected to extremely halobiotic condition

Cited by 2 publications

References 14 publications

Comparison of Damage Indexes for Assessing Seismic Fragility of Bearings in an Offshore Bridge

Comparison of Damage Indexes for Assessing Seismic Fragility of Bearings in an Offshore Bridge

Seismic Response Analysis of Pier considering Durability Damage Repair

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