[1] Wu Hairong, Lü Qingfang, Jin Weiliang, et al. Durability related environmental zonationand design methodology for marine RC structures [J]. Journal of Southeast University (English Edition), 2018, 34 (1): 78-86. [doi:10.3969/j.issn.1003-7985.2018.01.012]

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Durability related environmental zonationand design methodology for marine RC structures()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

34

Issue:

2018 1

Page:

78-86

Research Field:

Materials Sciences and Engineering

Publishing date:

2018-03-20

Info

Title:

Durability related environmental zonationand design methodology for marine RC structures

Author(s):

Wu Hairong¹;  2;  Lü Qingfang³;  Jin Weiliang¹

¹Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China
²School of Civil and Transportation Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
³School of Civil Engineering, Southeast University, Nanjing 210096, China

Keywords:

reinforced concrete structure;  marine;  chloride ion;  environment;  zonation;  durability design

PACS:

TU528.01

DOI:

10.3969/j.issn.1003-7985.2018.01.012

Abstract:

A reliability-based quantitative durability design methodology is presented for reinforced concrete(RC)structures in the marine environment on the basis of natural exposure data derived from four berths(1.5, 1.5, 4 and 15 years)of a concrete port. More than 200 chloride profiles are obtained and analyzed. The relationship between nominal surface chloride ion concentration and altitude is discussed. Subsequently, the formula of the apparent chloride diffusion coefficient is proposed with consideration of the surrounding temperature, sodium chloride solution concentration, age factor and altitude. Then, the reliability-based method to predict the durability of RC structures is developed according to Fick’s second law. Relationships between the predicted penetration depth of the chloride ion, the ratio of the wetting time per-period and the corresponding altitude are discussed. Subsequently, the environmental zonation methodology is established for concrete structures under a marine chloride environment by considering the ratio of the wetting time per-period of concrete as the zoning index. Finally, the corres-ponding durability design method for each zone level is established, which contains the durability design regulations of the specimen, and correction coefficients for different water/binder ratios, ages, temperatures and chloride ion concentrations.

References:

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Memo

Memo:

Biography: Wu Hairong(1983—), female, doctor, lecturer, zjuwhr@hncj.edu.cn.
Foundation item: The National Natural Science Foundation of China(No. 51508162).
Citation: Wu Hairong, Lü Qingfang, Jin Weiliang.Durability related environmental zonation and design methodology for marine RC structures[J].Journal of Southeast University(English Edition), 2018, 34(1):78-86.DOI:10.3969/j.issn.1003-7985.2018.01.012.

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