Fatigue reliability of deteriorating prestressed concrete bridges due to stress corrosion cracking

2001 ◽  
Vol 28 (4) ◽  
pp. 673-683 ◽  
Author(s):  
M A Maes ◽  
X Wei ◽  
W H Dilger
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Prestressed Concrete ◽  
Corrosion Cracking ◽  
Concrete Bridges ◽  
Concrete Bridge ◽  
Fatigue Reliability ◽  
Prestressing Steel ◽  
Prestressed Concrete Bridges ◽  
Prestressed Concrete Bridge

In this paper, an analysis framework is presented to develop a relationship between fatigue reliability in a prestressed concrete bridge and the progress of stress corrosion cracking (SCC) in prestressing steel. The fatigue limit state uses a cumulative damage model for prestressing steel wires, which is a function of both stress range and minimum stress. The SCC model takes into account varying degrees of material susceptibility, stress regimes, and environmental conditions and is structured around three stages: initiation of micro-cracking, propagation, and macro-crack instability using linear elastic fracture mechanics. The framework is an overall time-dependent analysis of the safety against fatigue of a prestressed concrete bridge. It involves a stochastic analysis of the evolution of prestressing wire corrosion as a function of time and a time-dependent probabilistic analysis of the fatigue reliability of the prestressed concrete bridge suffering a certain degree of deterioration. The uncertainties involved in the fatigue model, the SCC model, and traffic actions are considered. The updating of uncertainties is simplified by considering a limited number of classes representative of the severity of SCC exposure. The framework is applied to three deteriorating highway bridges.Key words: fatigue analysis, prestressing strands, stress corrosion cracking, reliability assessment, prestressed concrete bridges, deterioration.

Damage Assessment of One Prestressed Concrete Bridge after Fire

2012 ◽  
Vol 256-259 ◽  
pp. 2729-2734 ◽  
Author(s):  
Kai Xiang ◽  
Guo Hui Wang ◽  
Hua Xin Liu
Keyword(s):  
Prestressed Concrete ◽  
Damage Assessment ◽  
Assessment Method ◽  
Concrete Bridges ◽  
Concrete Bridge ◽  
Hollow Core ◽  
Plate Girders ◽  
Prestressed Concrete Bridges ◽  
Prestressed Concrete Bridge ◽  
Historical Sketch

The assessment method of fire-damaged concrete bridge with prestressed hollow core plate girders was presented in this paper. The historical sketch of assessment of fire-damaged concrete structures was briefly introduced. One fire-damaged concrete bridge with prestressed hollow core plate girders was shown as an example. The process of assessment of fire-damaged concrete bridge with prestressed hollow core plate girders was provided. According to the assessment results, methods of repair and strengthening were presented for different fire-damaged level of prestressed hollow core plate girders. The research results could help expand use of fire-damaged assessment and repair of prestressed concrete bridges.

Disease Analysis and Solutions of the Prestressed Concrete Bridge Cracks

2012 ◽  
Vol 178-181 ◽  
pp. 2398-2400
Author(s):  
Da Zhang ◽  
Hong Bo Yao
Keyword(s):  
Prestressed Concrete ◽  
Preventive Measures ◽  
Concrete Structures ◽  
Concrete Bridges ◽  
Concrete Bridge ◽  
Bridge Function ◽  
Prestressed Concrete Bridges ◽  
Treatment Measures ◽  
Prestressed Concrete Bridge ◽  
Disease Analysis

Prestressed concrete bridge, once completed, will inevitably generate a lot of cracks.These cracks seriously impact on the use of the bridge function. Cited a variety of cracks in prestressed concrete bridges, and from the cracks of prestressed concrete structures and components, described the causes of the prestressed concrete bridge cracks ,thus proposed a crack-effective preventive measures and treatment measures.

Susceptibility to stress corrosion cracking of a prestressing steel in NaHCO3 solutions

1993 ◽  
Vol 34 (6) ◽  
pp. 961-973 ◽  
Author(s):  
M.C. Alonso ◽  
R.P.M. Procter ◽  
C. Andrade ◽  
M. Sáenz de Santa María
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Prestressing Steel

fib Bulletin 26. lnfluence of material and processing on stress corrosion cracking of prestressing steel - case studies

2003 ◽  
Author(s):  
Manuel Elices ◽  
Alain Chabert ◽  
Jaime Galvez Ruiz ◽  
Lu Guanglu ◽  
Yasuharu Mikami ◽  
...  
Keyword(s):  
Stress Corrosion ◽  
Case Studies ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Prestressing Steel

Initiation of stress corrosion cracking in cold-drawn prestressing steel in hardened cement mortar exposed to chlorides

CORROSION ◽  
10.5006/3730 ◽  
2021 ◽  
Author(s):  
Dyana Joseline ◽  
Radhakrishna Pillai ◽  
Lakshman Neelakantan
Keyword(s):  
Stress Corrosion ◽  
Passive Film ◽  
Stress Corrosion Cracking ◽  
Cement Mortar ◽  
High Strength ◽  
Corrosion Cracking ◽  
Hardened Cement ◽  
Electrochemical Characteristics ◽  
Residual Tensile Stress ◽  
Prestressing Steel

Cold-drawn, high strength, prestressing (PS) steel strands are widely used in pretensioned concrete (PTC) structures. This paper discusses the stress corrosion cracking (SCC) of PS steel embedded in cement mortar and gradually exposed to chlorides. Various stages of the passive to active (P-to-A) transition, which marks the onset of SCC, were investigated using EIS technique. The key mechanisms were identified and confirmed using SEM/EDAX, XRD and Confocal Raman Spectroscopy. It was found that the passive film on unstressed PS steel has better electrochemical characteristics than that on conventional steel rebars. However, the residual tensile stress at the surface of PS steels can assist passive film cracking after chloride attack - contrary to the pitting corrosion without cracking of passive film in conventional steels. Further, tests indicated that the concentration of chlorides required to crack the passive film in PS steels can reduce by about 50% when prestressed – as in field structures. Chemical composition, stress state and microstructural features at the PS steel surface were identified as possible factors influencing the initiation of SCC in PTC structures.

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