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Citation:
　Xingang Zhou Kefei Li.Sensitivity Study on Durability Variables of Marine Concrete Structures[J].Journal of Marine Science and Application,2013,(2):200-207.[doi:10.1007/s11804-013-1186-x]
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Sensitivity Study on Durability Variables of Marine Concrete Structures

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Title:
Sensitivity Study on Durability Variables of Marine Concrete Structures
Author(s):
Xin’gang Zhou Kefei Li
Affilations:
Author(s):
Xin’gang Zhou Kefei Li
1. Department of Civil Engineering, Tsinghua University, Beijing 100084, China 2. School of Civil Engineering, Yantai University, Yantai 264005, China
Keywords:
marine concrete structures;  durability;  deterministic sensitivity analysis (DSA);  probability sensitivity analysis (PSA);  reliability;  chloride diffusion coefficient
分类号:
-
DOI:
10.1007/s11804-013-1186-x
Abstract:
In order to study the influence of parameters on durability of marine concrete structures, the parameter’s sensitivity analysis was studied in this paper. With the Fick’s 2nd law of diffusion and the deterministic sensitivity analysis method (DSA), the sensitivity factors of apparent surface chloride content, apparent chloride diffusion coefficient and its time dependent attenuation factor were analyzed. The results of the analysis show that the impact of design variables on concrete durability was different. The values of sensitivity factor of chloride diffusion coefficient and its time dependent attenuation factor were higher than others. Relative less error in chloride diffusion coefficient and its time dependent attenuation coefficient induces a bigger error in concrete durability design and life prediction. According to probability sensitivity analysis (PSA), the influence of mean value and variance of concrete durability design variables on the durability failure probability was studied. The results of the study provide quantitative measures of the importance of concrete durability design and life prediction variables. It was concluded that the chloride diffusion coefficient and its time dependent attenuation factor have more influence on the reliability of marine concrete structural durability. In durability design and life prediction of marine concrete structures, it was very important to reduce the measure and statistic error of durability design variables.

References:

Anders Lindvall (2001). Environmental actions and response-Reinforced concrete structures exposed in road and marine environments. Licentiate thesis. Department of Building Materials, Chalmers University of Technology, Goteborg, Sweden, 51-90.
Bae HR, Grandhi RV, Canfield RA (2003). Uncertainty quantification of structural response using evidence theory. American Institute of Aeronautics and Astronautics Journal, 41(10), 2062-2068.
CCES01-2004 Guide to durability design and construction of concrete structures. China Architecture Industry Press, 2005.
Cement Concrete & Aggregate Australia (2009). Chloride Resistance of Concrete.
EU-Project CHLORTEST (2006). Resistance of concrete to chloride ingress-From laboratory tests to infield performance. Sweden (Report).
Fib Bulletin 34 (2006). Model Code for Service Life Design.
Frederiksen JM, Geiker M (2000). On an empirical model for estimation of chloride ingress into concrete. Proceedings of the 2nd International RILEM Workshop “Testing and modeling Chloride Ingress into Concrete”, Paris, France, 355-371.
Li Kefei, Zhou Xingang, Li Quanwang (2009). Study on reliability based durability design method for 120 years designed life time of Hongkong-Zhuhai-Macao bridge concrete structures. Tsinghua University, Beijing.
Litzner HU, Becker A (1999). Design of Concrete structures for durability and strength. Materials and Structures, 32, 323-330.
Lv Zhenyu, Song Shufang, Li Hongshuang, Yuan XiuKai (2009). The reliability of structures and framework and its reliability sensitivity analysis, Science Press, Beijing.
Mansour AE, Wirsching PH (1995). Sensitivity factors and their application to marine structures. Marine structures, 8, 229-255.
Nilsson LO, Pouslen E, Sandberg P, Sorensen HE, Klighoffer SO (1996). HETEK, Chloride penetration into concrete, State-of-the-Art, Transport processes, corrosion initiation, test methods and prediction models. UDK, Report No. 53.
The European Union-Brite EuRam III-BE95-1347/R15. General Guidelines for Durability Design and Redesign. UK: 2000.
Thoft-Christensen P, Murotsu Y (1986). Application of structures system reliability theory. SpringerVerlag, Berlin.
Zhao YG, Ono T (1999). A general procedure for first/second order reliability method (FORM/SORM). Structural Safety, 21(2), 95-112.

Memo

Memo:
Supported by NSTSP - 2011BAG07B04
Last Update: 2013-07-05