Probability-Based Durability Analysis of Concrete Structures under Chloride Attack Environments

Kim, Jee-Sang; Jung, Sungjune; Kim, Do Kyung; Lee, Kwang-Myong; Bae, Su-Ho

doi:10.4334/jkci.2006.18.2.239

Cited by 7 publications

(2 citation statements)

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“…특히 염해(chloride attack)는 콘크리트 내의 철근을 부식시켜 구조물의 성능을 현저하게 저하시킨다. 3,4) 6) 국내 건설현장에서는 해양 콘크리트 구조물의 염해 내 구성 확보 및 수화열 저감을 위한 재료적 대책의 일환으 로 혼합시멘트(blended cement)의 사용이 증가하고 있 다. [7][8][9][10][11] 또한 현행 콘크리트 표준시방서에서도 내해수성 이 우수하고 수화열이 적은 이점을 고려하여 혼합시멘트 의 사용을 명기하고 있으며, 12) BS 및 ACI Code에서도 염 해 내구성 향상을 위하여 무기질 혼화재를 적절히 사용 하도록 제안하고 있다.…”

Section: 서 론 1)unclassified

A Comparative Study on Strength Development, Chloride Diffusivity and Adiabatic Temperature Rise of Marine Concrete Depending on Binder Type

Bae¹,

Cho²,

Shin³

et al. 2013

Journal of the Korea Concrete Institute

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Recently, in order to reduce a damage of chloride attack and hydration heat in marine concrete structures, blended cement in mixing the marine concrete is widely used. Long term strength development is distinct in concrete with blended cement and it also has excellent resistance to chloride attack and reduction of hydration heat. However, blended cement has a characteristic of relatively low compressive strength in early age of 28 days. On the other hand, a high level of compressive strength is required in the Standard Specification for marine concrete mix design. Such concrete mix design satisfying Standard Specification is effective to chloride attack but disadvantageous for hydration heat reduction due to large quantity of binder. In this study, the material properties of marine concrete considering water-binder ratio and binder type are experimentally investigated. Through the research results, compressive strength in blended cement at the age of 56 days is similar although it has smaller compressive strength at the age of 28 days compared with result of OPC (ordinary portland cement). Even though blended cement has a large water-binder ratio and small unit of binder content, chloride ion diffusion coefficient is still small and hydration heat is also found to be reduced. For meeting the required compressive strength in Standard Specification for marine concrete at 28 days, the increased unit content of binder is needed but the increased hydration heat is also expected.

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Section: 서 론 1)unclassified

A Comparative Study on Strength Development, Chloride Diffusivity and Adiabatic Temperature Rise of Marine Concrete Depending on Binder Type

Bae¹,

Cho²,

Shin³

et al. 2013

Journal of the Korea Concrete Institute

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“…또한 최근 Dey et al (2018)은 보도교에 대한 기준을 신뢰성 해석 관점에서 평가하여 유럽 과 북미 지역의 코드를 평가한 바 있고, Jamali et al (2019)는 교량의 내하력 평가에 있어 계측자료와 신뢰성 이론을 연계 한 연구결과를 발표한 바 있다. 이와 같은 신뢰성 해석 및 설계는 해안⋅해양분야에서 도 널리 적용되고 있으며,Kim, Seo, et al (2006)은 이상파랑Kim, Jung, et al (2006)은 염해를 받는 콘크리트 구조물의 내구성을 확률론적 방법을 도입하여 해석하였다. 이들은 몬테카를로 시뮬레이션 기법을 활용하여 내구성 설계인자 들이 콘크리트 구조물 내부에 위치한 철근의 부식 확률에 미치는 영향을 정량적으로 분석하였으며, 부식 확률 10%를…”

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Reliability Analysis of a Truss Structure Considering Structural Damage and Spatial Correlation between Random Variables

Cho¹,

Yi²

2019

J. Korean Soc. Hazard Mitig

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In this study, a reliability analysis is performed for a truss bridge considering uncertainties in structural properties and applied loads, structural damage, and spatial correlation between random variables. Two limit states are considered: a serviceability limit state based on allowable deflection and a stress limit state based on allowable stress. The Level II reliability analysis method, which is known as one of the moment methods, and the Level III method based on sampling techniques are used in the reliability analysis. In this study, the effects of structural damage and spatial correlation between random variables on the reliability index are intensively investigated. Results of the reliability analysis showed that structural damage has different effects on the reliability index and probability of failure in terms of the limit state and damaged member. With respect to spatial correlation, the probability of failure increases as the spatial correlation coefficient between random variables increases. Therefore, it can be concluded that structural damage and the spatial correlation between random variables should be reasonably considered to achieve a more rational reliability analysis.

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Development of a probabilistic life-cycle cost model for marine structures exposed to chloride attack based on Bayesian approach using monitoring data

Jung¹,

Park

Kim³

et al. 2013

KSCE J Civ Eng

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Probability-Based Durability Analysis of Concrete Structures under Chloride Attack Environments

Cited by 7 publications

References 0 publications

A Comparative Study on Strength Development, Chloride Diffusivity and Adiabatic Temperature Rise of Marine Concrete Depending on Binder Type

A Comparative Study on Strength Development, Chloride Diffusivity and Adiabatic Temperature Rise of Marine Concrete Depending on Binder Type

Reliability Analysis of a Truss Structure Considering Structural Damage and Spatial Correlation between Random Variables

Development of a probabilistic life-cycle cost model for marine structures exposed to chloride attack based on Bayesian approach using monitoring data

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