Chloride ingression in reinforced concrete beams subjected to flexural loading under cyclic drying-wetting condition

被引：1

作者：

Cai J. ^{[1
,2
]}

Li M. ^{[1
]}

Chen Q. ^{[1
,2
]}

Lai J. ^{[1
]}

Wei M. ^{[1
]}

机构：

[1] School of Civil Engineering and Transportation, South China University of Technology, Guangzhou

[2] State Key Laboratory of Subtropical Building Science, Guangzhou

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2019年 / 50卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Chloride ingression; Concrete damage; Cyclic drying-wetting; Flexural loading; Numerical simulation;

D O I：

10.11817/j.issn.1672-7207.2019.11.023

中图分类号：

学科分类号：

摘要：

In order to explore the impact of flexural loading on chloride ion transport in reinforced concrete beam under cyclic drying-wetting condition, a concrete scalar damage was introduced as the coupling intermediate quantity, and a well-fitted load correction function was presented to correct the chloride diffusion coefficient of different damage parts. Transportation model of chloride ion and water in concrete beams was established by considering the coupling effect of drying-wetting cycles and flexural loading. On this basis, a numerical analysis method was proposed using COMSOL to simulate the chloride ingression. Experimental investigation was carried out on reinforced concrete beams with flexural loading and ingression duration as variables. The results show that the chloride ion mass fraction at specific position in concrete beams increases with the increase of flexural loading and ingression duration. The chloride ion mass fraction is relatively higher in bending section than that of bending shear section for each test beam. Flexural loading affects the damage range and degree of elements, which further affects the transportation of chloride ion. © 2019, Central South University Press. All right reserved.

引用

页码：2840 / 2850

页数：10

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