Deterioration and Evaluation Method of Mechanics Behavior of Reinforced Concrete Column under Sulfate Attack

Abstract:

This paper has studied the reinforced concrete eccentrically compressed members through the laboratory accelerated corrosion method, which has been also combined with the continuous damage theory to give a preliminary definition of the damage degree of concrete uniform corrosion. The study has shown that with the increase of concrete corrosion layers, the bonding properties of steel and concrete keeps falling. With the increase of damage degree, the concrete will be advanced into the compression and the steel can’t fully exert its tensile properties. The bearing capacity of large and small eccentric hydraulic components will be decreased with the increase of damage degree. With the increase of damage degree, the neutral axis of concrete compressed column will shift to the eccentric point, which can make the eccentricity become small. No matter the unilateral corrosion or the peripheral corrosion, the column deflection is proportional to the damage degree and the column stiffness will be decreased with the increase of corrosion layers.

• Periodical: Applied Mechanics and Materials (Volumes 90-93)
• Pages: 3085-3088
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.90-93.3085
• Online since: September 2011
• Authors: Feng Jie Zhang, Ying Shu Yuan, Ruo Yu Wang
• Keywords: Concrete, Damage Degree, Members with Flexure and Compression, Sulfate Attack

References

[1] DIAMOND S. Thaumasite in Orange County,Southern California :an inquiry into the effect of low temperature[J] .Cement & Concrete Composites ,2003 ,25（8）:1161-1164.

DOI: 10.1016/s0958-9465(03)00138-0

[2] CRAMMOND N J. The thaumasite form of sulfate attack in the UK [J]. Cement & Concrete Composites ,2003 , 25（8）:809-818.

DOI: 10.1016/s0958-9465(03)00106-9

[3] BICKLEY J A , HEMMINGS R T,et al .Thaumasite related deterioration of concrete structures//[C]Malhotra VM editor,concrete technology :past ,present and future. SP - 144. Detroit.:American Concrete Institute ,1994,12(7):674-682

DOI: 10.14359/4396

[4] THOMAS M D A, ROGERS C A, BLESZYNSKI R F, Occurrences of thaumasite in laboratory and field concrete[J]. Cement & Concrete Composites ,2003 ,25（8）:1045-1050.

DOI: 10.1016/s0958-9465(03)00134-3

[5] FREYBURG E,BERNINGER A M. Field experiences in concrete deterioration by thaumasite formation :possibilities and problems in thaumasite analisys[J].Cement & Concrete Composites ,2003 ,25（8）:1105-1110.

DOI: 10.1016/s0958-9465(03)00135-5

[6] ZHANG Yu , jiang Li-xue,Zhang Wei-ping,Qu Wen-jun .Durability of Concrete Structures [M]. Shanghai Science and Technology Press 2003（12）：2-6, In Chinese.

[7] LIANG Yong-ning,YUAN Ying-shu. Effects of environmental factors of sulfate attack on deterioration of concrete mechanical behavior [J].Journal of China University of Mining & Technology, 2005,34(04):452-453, In Chinese.