Please wait a minute...
浙江大学学报(工学版)
J4  2010, Vol. 44 Issue (6): 1191-1196    DOI: 10.3785/j.issn.1008-973X.2010.06.026
    
Path probability model of corrosion-crack assessment for existing reinforced concrete structures
WANG Xiao-zhou1,2, JIN Wei-liang1,YAN Yong-dong 1
1. Institute of Structural Engineering ,Zhejiang University, Hangzhou 310017, China; 2. Hanjia Design Group Co.,Ltd., Hangzhou 310005, China
Download:   PDF(0KB) HTML
Export: BibTeX | EndNote (RIS)      

Abstract  

For the status that corrosion of reinforcement, indetectable corrosion degree and corrosion-induced crack of existing concrete structures in chloride-laden environment, a path probability model(PPM) to predict the stochastic corrosioncrack development of reinforced concrete(RC) structures with time was proposed. The time-dependent probability distribution of steel corrosion ratio, crack width of concrete due to corrosion and percentage of corroded steel samples of elements were estimated effectively on a series of random paths of corrosioncrack process simulated by computer programme. The substructure of an RC bridge in chlorideladen environment was illustrated to verify the precise and effectiveness of the present model by the assessment result of field inspection data. The model can effectively predict the durability behavior of existing concrete structures and the predicted result is a reasonable proof for optimal strategies of maintenance and repair.

Published: 16 July 2010
CLC:  TU 375  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
Cite this article:

WANG Xiao-Zhou, JIN Wei-Liang, YAN Yong-Dong. Path probability model of corrosion-crack assessment for existing reinforced concrete structures. J4, 2010, 44(6): 1191-1196.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2010.06.026     OR     http://www.zjujournals.com/eng/Y2010/V44/I6/1191


混凝土结构锈胀开裂预测的路径概率模型

针对氯盐环境下服役混凝土结构钢筋锈蚀、锈蚀程度不易检测及混凝土锈致开裂的现状,基于混凝土锈胀开裂过程的随机性,提出一种预测钢筋锈蚀、混凝土锈胀裂缝开展时变特性的概率模型,并编制了计算程序.该模型可以模拟混凝土中钢筋锈胀开裂发展进程的路径,有效评估氯盐侵蚀环境下混凝土结构中钢筋锈蚀状况和锈胀裂缝宽度不同时段的概率分布,同时能估计构件钢筋样本锈蚀百分比.通过对濒海环境下某混凝土桥下部结构的耐久性评估,验证了该模型的准确性.该模型实现了对服役混凝土结构耐久性能的有效预测,评估结果可为工程维修和加固提供理论依据.

［1］ YAN Yandong , JIN Weiliang. Influence of cracking width to concrete durability［C］∥Proceedings of International Conference on Durability of Concrete Structures.Hangzhou, China:［s.n.］,2008,2: 942946.

［2］ JIN Weiliang, WANG Xiaozhou, SONG Zhigang. A probabilistic model for corrosion prediction of steel reinforcement［J］. Int J Modelling, Identification and Control, 2008,4(3): 268277.

［3］ 宋志刚,金伟良,刘芳,等.钢筋锈蚀率概率分布的动态演进模拟［J］,浙江大学学报:工学版,2006, 40 (10) : 17491753.

SONG Zhigang, JIN Weiliang, LIU Fang, et al. Dynamic simulation method for probability evolution of reinforcement steel corrosion［J］. Journal of Zhejiang University :Engineering Science, 2006, 40 (10) : 17491753.

［4］ REDDY B, GLASS G K, LIM P J, et al. On the corrosion risk presented by chloride bound in concrete［J］.Cement & Concrete Composites, 2002(24): 15.

［5］ OH B H, JANG S Y. Prediction of diffusivity of concrete based on simple analytic equations［J］. Cement and Concrete Research , 2004, 34(3): 463480.

［6］ VAL D V, STEWART M G. Lifecycle cost analysis of reinforced concrete structures in marine environments［J］. Structural Safety, 2003(25): 343362.

［7］ VU K A T, STEWART M G.Structural reliability of concrete bridges including improved chlorideinduced corrosion models［J］.Structural Safety, 2000(22): 313333.

［8］ LIU T, WEYERS R E. Modeling the dynamic corrosion process in chloride contaminated concrete structures［J］. Cement and Concrete Research, 1998(28): 365379.

［9］ DAI J G, KATO E, IWANAMI M, et al.Variations of steel corrosion and itinduced and influenced cracks in RC tensile ties accelerately deteriorated by impressedcurrent method［C］∥YOKOTA H, SHIMOMURA T, eds. Proceedings of International Workshop on Life Cycle Management of Coastal Concrete Structures. Nagaoka, Japan:Port and Airport Research Institute,2006:101108.

［10］ VIDAL T, CASTEL A, FRANCOIS R. Analyzing crack width to predict corrosion in reinforced concrete［J］.Cement and Concrete Research, 2004(34): 165174.

［11］ 浙江省乐清市清江大桥检测及静载试验报告［R］.武汉:中交第二公路勘测设计研究院有限公司,2008.
[1] JIN Wei-liang, WANG Yi. Experimental study on mechanics behaviors of reinforced concrete beams under simultaneous chloride attacks and sustained load[J]. J4, 2014, 48(2): 221-227.
[2] ZHANG Si-ying, JIN Wei-liang, XU Chen. Effectiveness of an amine-based inhibitor—guanidine for
steel in chloride-contaminated concrete[J]. J4, 2013, 47(3): 449-455.
[3] JIN Wei-liang, LI Zhi-yuan, XU Chen. Life prediction method of concrete structures based on
relativistic information entropy[J]. J4, 2012, 46(11): 1991-1997.
[4] XIANG Yi-qiang, CHENG Kun, GUO Dong-mei, LI Wei, LIN Shi-xu. Analysis of RC bulge cracking by coupled
thermal-mechanical method[J]. J4, 2012, 46(8): 1444-1449.
[5] JI Yong-sheng, WANG Zhi-long, XU Cong-yu, ZHOU Min, ZHAO Wen. Study on polarization curve diagrams of steel corrosion in concrete[J]. J4, 2012, 46(8): 1457-1464.
[6] CHEN Ju, JIN Wei-Liang, CHENG Xiao-Gong, et al. Experimental and numerical investigation of innovative movable connection[J]. J4, 2009, 43(10): 1878-1882.