|Table of Contents|

Analysis of expansion internal stress of concrete under coupling action of corrosion and fatigue(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2013年02期
Page:
22-26,37
Research Field:
道路工程
Publishing date:

Info

Title:
Analysis of expansion internal stress of concrete under coupling action of corrosion and fatigue
Author(s):
XING Ming-liang1;  WANG Bo-yu2;  LI Hua-ping3;  CHEN Shuan-fa1
1. Engineering Research Center of Transportation Materials for the Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi,China; 2. Hanshi Highway Management Office of Hubei Provicial Communications Department, Wuhan 430051, Hubei, China; 3. Zhuhai Urban and Municipal Construction Co Ltd, Zhuhai 519002, Guangdong, China
Keywords:
road engineering;  concrete;  sulfate corrosion;  expansion internal stress;  numerical analysis
PACS:
U416.224
DOI:
-
Abstract:
To study the impact of alternation load on expansion internal stress of the sulfate corrosion concrete, the effective diffusion coefficient impacted by alternating stress level and loading frequency was introduced, diffusion reaction equation basing on Fick's second law under the coupling action of corrosion and fatigue, and the finite difference method was used to solve it. Based on constitutive relation of the uniaxial tensile strength of concrete, the expansion internal stress was calculated through expansion strain, the influence of alternating load stress level, loading frequency, the concentration of external sulfate and water-cement ratio on concrete expansion internal stress was studied, and gray relational entropy was used to analyze various factors. The results indicate that with increasing of the stress level of alternating load, loading frequency, water-cement ratio and external sulfate concentration, the time of generating expansion internal stress and achieving the ultimate tensile strength increases in varying degrees, among which the main influencing factor is water-cement ratio. In corrosion fatigue condition, if concrete design meet the requirements, the smaller water-cement ratio of concrete should be adopted to improve its durable performance. 2 tabs, 5 figs, 9 refs.

References:

[1] Guo R D,Li Q B,Zhao S B,et al.Deterioration mechanisms of sulfate attack on concrete under alternate action[J].Journal of Wuhan University of Technology:Materials Science,2010,25(2):355-359.
[2]Marchand J,Samson E,Maltais Y,et al.Theoretical analysis of the effect of weak sodium sulfate solutions on the durability of concrete[J].Cement and Concrete Composites,2002,24(3/4):317-329.
[3]Gospodinov P N.Numerical simulation of 3D sulfate ion diffusion and liquid push out of the material capillaries in cement composites[J].Cement and Concrete Composites,2005,35(3):520-526.
[4] 金祖权,孙 伟,张云升,等.混凝土在硫酸盐、氯盐溶液中的损伤过程[J].硅酸盐学报,2006,34(5):630-635. JIN Zu-quan,SUN Wei,ZHANG Yun-sheng,et al.Damage of concrete in sulfate and chloride solution[J].Journal of the Chinese Ceramic Society,2006,34(5):630-635.(in Chinese)
[5] 左晓宝.硫酸盐侵蚀下的混凝土耐久性损伤全过程分析研究[D].南京:东南大学,2009. ZUO Xiao-bao.Theoretical and experimental investigations on concrete deterioration subjected to external sulfate attack[D].Nanjing:Southeast University,2009.(in Chinese)
[6]陈拴发,李华平,李祖仲,等.交变荷载对硫酸盐侵蚀混凝土扩散系数影响的表征[J].中外公路,2011,31(5):201-204. CHEN Shuan-fa,LI Hua-ping,LI Zu-zhong,et al.Characterization on the influence of alternation loading to diffusion coefficient in sulfate corrosion concretes[J].Journal of China & Foreign Highway,2011,31(5):201-204.(in Chinese)
[7]汤海昌.硫酸盐侵蚀下混凝土耐久性分析[D].南京:南京理工大学,2008. TANG Hai-chang.The durability analysis of concrete subjected to sulfate atteck[D].Nanjing:Nanjing University of Science and Technology,2008.(in Chinese)
[8]过镇海,时旭东.钢筋混凝土原理与分析[M].北京:清华大学出版社,2003. GUO Zhen-hai,SHI Xu-dong.Principle and analysis of reinforced concrete[M].Beijing:Tsinghua University Press,2003.(in Chinese)
[9] 关博文,刘开平,陈拴发,等.水镁石纤维路面混凝土路用性能[J].长安大学学报:自然科学版,2012,32(1):26-30. GUAN Bo-wen,LIU Kai-ping,CHEN Shuan-fa,et al.Road performance of brucite fiber reinforced pavement concrete[J].Journal of Chang'an University:Natural Science Edition,2012,32(1):26-30.(in Chinese)

Memo

Memo:
-
Last Update: 2013-04-20