[1]牛荻涛,陆炫毅,苗元耀,等.盐雾环境下疲劳损伤混凝土氯离子扩散性能[J].西安建筑科技大学学报：自然版,2015,47(05):617-620,648.[doi:DOI：10.15986/j.1006-7930.2015.05.001]
　NIU Ditao,LU Xuanyi,MIAO Yuanyao,et al.Diffusion of chloride ions into fatigue-damaged concrete in salt spray environment[J].J.Xi’an Univ. of Arch. & Tech.：Natural Science Edition,2015,47(05):617-620,648.[doi:DOI：10.15986/j.1006-7930.2015.05.001]
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盐雾环境下疲劳损伤混凝土氯离子扩散性能()
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西安建筑科技大学学报：自然版[ISSN:1006-7930/CN:61-1295/TU]

卷:
47
期数:
2015年05期
页码:
617-620,648
栏目:
出版日期:
2015-10-29

文章信息/Info

Title:
Diffusion of chloride ions into fatigue-damaged concrete in salt spray environment
文章编号:
1006-7930(2015)05-0617-04
作者:
牛荻涛; 陆炫毅; 苗元耀; 周艳霞
(西安建筑科技大学土木工程学院,陕西 西安 710055 )
Author(s):
NIU Ditao;  LU Xuanyi;  MIAO Yuanyao;  ZHOU Yanxia
( School of Civil Engineering, Xian Univ. of Arch . & Tech ., Xian 710055, China)
关键词:
盐雾; 疲劳损伤; 氯离子; 混凝土
Keywords:
salt spray;  fatigue damage ;  chloride ions;  concrete
分类号:
TU528
DOI:
DOI：10.15986/j.1006-7930.2015.05.001
文献标志码:
A
摘要:
针对沿海地区桥梁结构实际服役情况，开展了盐雾环境下弯曲疲劳损伤混凝土的氯离子侵蚀试验研究．研究结果表明：弯曲疲劳荷载对混凝土造成损伤，劣化了混凝土抗氯离子侵蚀性能．氯离子在混凝土中的扩散系数随疲劳损伤变量的增加而增大，并且氯离子在弯曲疲劳受拉区的扩散系数大于受压区．最后引入疲劳荷载影响系数反映疲劳损伤对氯离子扩散系数的影响，拟合得到疲劳荷载影响系数与损伤变量的关系式，为沿海地区桥梁混凝土结构的耐久性研究提供参考．
Abstract:
According to the actual service conditions of bridge structures in coastal areas, a research on d iffusion of chloride ions into bending fatigue-damaged concrete in salt spray environment was carried out. It is shown that bending fatigue causes the damage of concrete and deteriorates the performance of resistance to chloride ion corrosion of the concrete. The chloride diffusion coefficient in the concrete increases with the increase of fatigue damage variables. Besides, chloride diffusion coefficient in tensile region is larger than that in the compressive region. The fatigue load effect coefficient is introduced to reflect the impact of fatigue damage on chloride diffusion coefficient. At last an equation of the fatigue load effect coefficient with the damage variable is simulated which p rovides reference for the study on the durability of bridge concrete structures in coastal areas.

参考文献/References:

References

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备注/Memo

备注/Memo:
收稿日期：2015-06-01 修改稿日期：2015-10-12
基金项目：交通运输部应用基础研究基金资助项目（2013319223110）
作者简介：牛荻涛（1963-），男，博士，教授，博导，主要从事混凝土结构耐久性与寿命预测方面研究．E-mail：niuditao@163.com
更新日期/Last Update: 2015-12-14