한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
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Probability-Based Durability Design for Concrete Structure with Crack: Bimodal Distribution of Chloride Diffusion

  • Na, Ung-Jin (Ministry of Land, Infrastructure and Transport. Division of Airport) ;
  • Kwon, Seung-Jun (Hannam University, Civil and Environmental Eng.)
  • 투고 : 2015.03.03
  • 심사 : 2015.03.25
  • 발행 : 2015.03.30
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초록

Chloride ions in RC (Reinforced Concrete) structures can cause very severe corrosion in reinforcement steel. It is generally informed that chloride penetration can be considerably accelerated by enlarged chloride diffusion due to cracks. These cracks play a role in main routes through which chloride ions penetrate into the concrete, and also lead to steel corrosion in RC structures exposed to chloride attack, such as port and ocean structures. In this paper, field survey including evaluation of crack and chloride concentration distribution in concrete is performed to investigate an effect of crack on chloride diffusion. The service life of cracked concrete exposed to the marine environmental condition is estimated considering the crack effect on chloride diffusion. For this purpose, diffusion coefficients in cracked concrete are obtained based on the field survey. Using the relationship between diffusion coefficients in the cracked concrete and the crack widths, service life of the cracked concrete is predicted in a probabilistic framework. A bimodal distribution with two peaks, consisting of a weighted sum of two normal distributions is introduced to describe chloride diffusion of the concrete wharf with crack.

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참고문헌

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피인용 문헌

  1. Current Trends of Durability Design and Government Support in South Korea: Chloride Attack vol.9, pp.3, 2017, https://doi.org/10.3390/su9030417