全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

弯曲荷载作用下水位变动区域混凝土中氯离子扩散规律试验

, PP. 76-82

Keywords: 桥梁工程,混凝土,试验研究,氯离子扩散,弯曲荷载,水位变动区域

Full-Text   Cite this paper   Add to My Lib

Abstract:

?为了明确氯离子在水位变动区域混凝土中的扩散特性,研究了干湿交替条件和弯曲荷载共同作用下氯离子在混凝土中的扩散规律。试验过程中考虑3个试验因素:混凝土强度等级、弯曲荷载水平、应力性质。试验结果表明:随着混凝土强度等级的提高,氯离子扩散性能降低;随着荷载水平的提高,受拉区混凝土抗氯离子侵蚀的能力降低,受压区混凝土抗氯离子侵蚀的能力有所提高;受拉区混凝土抗氯离子侵蚀能力明显低于受压区;无论承受受压荷载还是受拉荷载,随着时间的延长,氯离子在混凝土中的扩散系数均逐渐降低。

References

[1]  MEHTA P K.Durability of Concrete-Fifty Years of Progress[C]//MALHORTA V M.Proceedings of the 2nd International Conference on Durability of Concrete.Farmington Hills:ACI, 1991:1-31.
[2]  吴海军, 陈艾荣.桥梁结构耐久性设计方法研究[J].中国公路学报, 2004, 17(3):57-61.
[3]  陈拴发, 王秉纲.高性能混凝土应力腐蚀影响因素显著性分析[J].长安大学学报:自然科学版, 2005, 25(5):1-5.
[4]  陈拴发, 王秉纲.高性能混凝土应力腐蚀评价指标[J].交通运输工程学报, 2005, 5(1):6-10.
[5]  ANDREA B, EVAN B, THOMAS M D A, et al.An Overview and Sensitivity Study of a Multi-mechanistic Chloride Transport Model[J].Cement and Concrete Research, 1999, 29(6):827-837.
[6]  HE Shi-qin.Test Study of Reinforced Concrete Component Durability in Chloride Environment[D].Dalian:Dalian University of Technology, 2004.
[7]  XING Feng, LENG Fa-guang, FENG Nai-qian, et al.Influence of Long-term Sustain Loads on Chloride Ingress in Concrete[J].Concrete, 2004, 31(5):3-8.
[8]  JTJ 270—89, Concrete Test Code of Water Carriage Engineering[S].
[9]  KONIN A, FRANCOIS R, ARLIGUIE G.Penetration of Chlorides in Relation to the Micro-cracking State into Reinforced Ordinary and High Strength Concrete[J].Materials and Structures, 1998, 31(5):310-316.
[10]  MANGAT P S, MOLLOY B T.Prediction of Long Term Chloride Concentration in Concrete[J].Materials and Structures, 1994, 27(6):338-346.
[11]  WU Hai-jun, CHEN Ai-rong.Study of Durability Design Method for Bridge Structures[J].China Journal of Highway and Transport, 2004, 17(3):57-61.
[12]  CHEN Shuan-fa, WANG Bing-gang.Prominent Property Analysis of Influential Factors of High Performance Concrete Stress Corrosion[J].Journal of Changan University:Natural Science Edition, 2005, 25(5):1-5.
[13]  CHEN Shuan-fa, WANG Bing-gang.Stress Corrosion Evaluation Indices of High Property Concrete[J].Journal of Traffic and Transportation Engineering, 2005, 5(1):6-10.
[14]  何世钦.氯离子环境下钢筋混凝土构件耐久性能试验研究[D].大连:大连理工大学, 2004.
[15]  邢 锋, 冷发光, 冯乃谦, 等.长期持续荷载对素混凝土氯离子渗透性的影响[J].混凝土, 2004, 31(5):3-8.
[16]  JTJ 270—89, 水运工程混凝土试验规程[S].
[17]  KONIN A, FRANCOIS R, ARLIGUIE G.Analysis of Progressive Damage of Reinforced Ordinary and High Performance Concrete[J].Materials and Structures, 1998, 31(1):27-35.
[18]  COSTA A, APPLETON J.Chloride Penetration into Concrete in Marine Environment-PartⅠ:Main Parameters Affecting Chloride Penetration[J].Materials and Structures, 1999, 32(4):252-259.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133