Discussion on Anchor Structures’ Deterioration Analysis Parameter Caused by Reinforcement Corrosion under Erosion Environment Condition

Abstract:

Because of long-term chloride erosion and alternate drying-wetting effect, anchorage support structure of underground engineering is liable to reinforced corrosion and its strength is decreased. According to previous research theory and test results, reinforced corrosion to deteriorate load-bearing role of anchorage support structure system is studied by means of numerical analysis FLAC3D and idea of finite element strength reduction. The results are as follows: (1) losses in the anchor structural performance in underground engineering with corroded reinforcements are caused by three factors: losses in the effective cross-sectional area of anchoring body, losses in the mechanical performance of reinforcing bars and losses in the bond performance of anchoring body. (2) Based on reinforcement mechanical model in FLAC3D, deterioration of mechanical performance of anchor structures caused in underground engineering was analyzed due to reinforcement corrosion. And according to idea of finite element strength reduction and results of laboratory test, deterioration analysis parameter caused by corrosion can be reduced accordingly. The research results can provide the theory support to analyze corrosion deterioration of anchor structure in underground engineering using numerical simulation.

• Periodical: Applied Mechanics and Materials (Volumes 268-270)
• Pages: 827-830
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.268-270.827
• Online since: December 2012
• Authors: Wan Tao Ding, Jin Hui Liu, Shu Cai Li
• Keywords: Anchorage Support, Deterioration, Finite Element Strength Reduction, Influence Degree of Corrosion, Reinforced Corrosion

References

[1] Jinjie Shi, Wei Sun.JOURNAL OF THE CHINESE CERAMIC SOCIETY, Vol.38(2010),pp.1753-1763.(In Chinese)

[2] A bdullah A. Almusallam, Ahmad S. Al-Gahtani, Abdur Rauf Aziz and Rasheeduzzafart. Effect of reinforcement corrosion on bond strength.Construction and Building Materials,Vol.10(1996), pp.23-129.

DOI: 10.1016/0950-0618(95)00077-1

[3] Yingshu Yuan, Suo Yu, Fuping Jia. Industrial Construction,Vol.29(1999),pp.47-50.(In Chinese)

[4] Congqi Fang, Karin Lundgren, Liuguo Chen et al. Corrosion influence on bond in reinforced concrete. Cement and Concrete Research , Vol.34(2004),pp.2159-2167.

DOI: 10.1016/j.cemconres.2004.04.006

[5] Morinaga S. Prediction of service lives of reinforced concrete buildings based on rate of corrosion of reinforcing steel. In:Proceedings of building materials and components, Brighton, UK;1990,p.5–16.

[6] Ning Xia, Qingwen Ren. SHUILI XUEBAO, Vol.37(2006),pp.70-74.(In Chinese)

[7] Dong Chen, Sankaran Mahadevan. Chloride-induced reinforcement corrosion and concrete cracking simulation.Cement & Concrete Composites,Vol.30(2008),pp.227-238.

DOI: 10.1016/j.cemconcomp.2006.10.007

[8] D.V. Griffiths P.A. Lane. Slope stability analysis by finite elements.Geotehnique, Vol.49(1999),pp.87-403.

[9] Itasca Consulting Group Inc. FLAC3D(Version2.1)users manual-STRUCTURAL ELEMENTS[R].USA: Itasca Consulting Group Inc.,1997.