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http://dx.doi.org/10.4334/JKCI.2016.28.2.149

Service Life Evaluation through Probabilistic Method Considering Time-Dependent Chloride Behavior  

Kwon, Seung-Jun (Dept. of Civil Engineering, Hannam University)
Publication Information
Journal of the Korea Concrete Institute / v.28, no.2, 2016 , pp. 149-156 More about this Journal
Abstract
The service life in RC (Reinforced Concrete) is very important and it is usually obtained through deterministic method based on Fick's 2nd law and probabilistic method. This paper presents an evaluation of $P_{df}$(durability failure probability) and the related service life considering time-dependent behaviors in chloride diffusion and surface chloride content. For the work, field investigation is performed for RC structures exposed to chloride attack for 3.5~4.5years, focusing tidal zone (6.0 m) and sea shore (9.0 m), respectively. Random variables like cover depth, chloride diffusion coefficient, and surface chloride content are obtained, and $P_{df}$ and the service life are evaluated. Unlike the results from deterministic method using LIFE 365, probabilistic method with time effects on diffusion and surface chloride shows a relatively rapid change in the result, which is a significant reductions of service life in the case with low surface chloride content. For probabilistic evaluation of durability, high surface chloride content over $10.0kg/m^3$ is required and reasonable service life can be derived with consideration of time-dependent diffusion coefficient.
Keywords
chloride attack; probabilistic durability design; time-dependent diffusion; Fick's 2nd law;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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1 Broomfield, J. P., Corrosion of Steel in Concrete: Understanding, Investigation and Repair, London, E&FN, 1997, pp.1-15.
2 Kwon, S.-J., Park, S. S., and Lho, B.-C., "Durability Evaluation of Inorganic-Impregnated Concrete Exposed to Long-Term Chloride Exposure Test", Journal of the Korea Concrete Institute, Vol.20, No.3, 2008, pp.283-290.   DOI
3 Thomas, M.D.A., and Bentz, E.C., Computer program for predicting the service life and life-cycle costs of reinforced concrete exposed to chlorides, Life365 Manual, SFA, 2002, pp.2-28.
4 Lee, S.-H., and Kwon, S.-J., "Experimental Study on the Relationship between Time-Dependent Chloride Diffusion Coefficient and Compressive Strength", Journal of the Korea Concrete Institute, Vol.24, No.6, 2012, pp.715-726.   DOI
5 Park, S.-S., Kwon, S.-J., and Jung, S.-H., "Analysis Technique for Chloride Penetration in Cracked Concrete Using Equivalent Diffusion and Permeation", Construction and Building Materials, Vol.29, No.2, 2012, pp.183-192.   DOI
6 Maekawa, K., Ishida, T., and Kishi, T., "Multi-Scale Modeling of Concrete Performance", Journal of Advanced Concrete Technology, Vol.1, No.2, 2003, pp.91-126.   DOI
7 Song, H.-W., Pack, S.-W., Lee, C.H., and Kwon, S.-J., "Service Life Prediction of Concrete Structures under Marine Environment Considering Coupled Deterioration", Journal of Restoration Building and Monuments, Vol.12, No.4, 2006, pp.265-284.
8 Duprat, F., and Sellier, A., "Probabilistic Approach to Corrosion Risk Due to Carbonation via An Adaptive Response Surface Method", Journal of Probability Engineering and Mechanics, Vol.21, No.4, 2006, pp.207-216.   DOI
9 Ferreira, F., Arskog, V., and Gjorv, O. E., "Probability Based Durability Analysis of Concrete Harbor Structures", Proceedings of CONSEC04, Vol.1, No.1, 2004, pp.999-1006.
10 ACI 318-11, Building Code Requirements for Structural Concrete and Commentary, 2011.
11 British Standards 6349-1-4, Maritime Works, General, Code of Practice for Materials, 2013.
12 British Standards-8110-1, Structural Use of Concrete, Code of Practice for Design and Construction, 1997.
13 Japan Society of Civil Engineering, Standard Specifications and Guidelines, 2007.
14 British Standars, 8500-1, Concrete Complementary British Standard to BS EN 206-1: Method of Specifying and Guidance for the Specifier, 2006.
15 Japan Society of Civil Engineering-Concrete Committee, Standard Specification for Concrete Structures, 2002.
16 ACI 301-10, Specifications for Structural Concrete, 2010.
17 Korea Concrete Institute. Concrete Standard Specification - Durability Part, 2004.
18 Kwon, S.-J., Na, U.J., Park, S.S., and Jung, S.H., "Service Life Prediction of Concrete Wharves with Early-Aged Crack: Probabilistic Approach for Chloride Diffusion", Structure and Safety, Vol.31, No.1, 2009, pp.75-83.   DOI
19 CEB Task Group 5.1, 5.2, New Approach to Durability Design, CEB, Sprint-Druck, Stuttgart, 1997, pp.29-43.
20 Song, H.-W., Pack, S.-W., and Ann, K.-Y., "Probabilistic Assessment to Predict the Time to Corrosion of Steel in Reinforced Concrete Tunnel Box Exposed to Sea Water", Construction and Building Materials, Vol.23, No.10, pp. 3270-3278.   DOI
21 Stewart, M.G., and Mullard, J.A., "Spatial Time-Dependent Reliability Analysis of Corrosion Damage and the Timing of First Repair for RC Structures", Engineering Structure, Vol.29, No.7, 2007, pp.1457-1464.   DOI
22 DuraCrete-Final Technical Report, Probabilistic Performance Based Durability Design of Concrete Structures, Document BE95-1347/R17, European Brite-Euram III, Published by CUR, May, The Netherlands, 2000.
23 Stewart, M.G., and Rosowsky, D.V., "Time-Dependent Reliability of Deteriorating Reinforced Concrete Bridge Decks", Structure and Safety, Vol.20, No.1, 2007, pp.91-109.
24 Kwon, S.-J., Song, H.-W., and Byun, K.J., "Durability Design for Cracked Concrete Structures Exposed to Carbonation Using Stochastic Approach", Journal of Korea Society of Civil Engineering, Vol.25, No.5A, pp.741-750.
25 Kwon, S.-J., Park, S.-S., Nam, S.-H., and Lho, B.-C., "A Service Life Prediction for Unsound Concrete Under Carbonation Through Probability of Durable Failure", Journal of the Korea Institute for Structural Maintenance and Inspection, Vol.12, No.2, 2008, pp.49-58.
26 Japan Society of Civil Engineering. Concrete Library 109: Proposal of the Format for Durability Database of Concrete, 2002.
27 EN 1991. Eurocode 1, Basis of Design and Actions on Structures, CEN, 2000.
28 Nawy, E.G., Reinforced Concrete-A Fundamental Approach, Prentice Hall, Inc. 2nd Edition, 1990, pp. 69-72.