| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
|
|
|
|
|
| Analysis of Stress in Concrete Induced by Corrosion of Reinforcing Bar Based on DIC and Strain Test |
| WANG Xiaoxian, JIN Zuquan, JIANG Yudan, CHEN Fanxiu
|
| College of Civil Engineering, Qingdao University of Technology, Qingdao 266033 |
|
|
|
|
Abstract It is universally known that concrete would crack when expansion stress induced by corrosion of reinforcing bar exceeds the tensile strength of concrete. And directly measuring the corrosion stress of rebar contributes to predicting the cracking time of concrete. In this paper, acce-lerated corrosion of reinforced concrete was carried out by constant potential corrosion and seawater penetration. The digital image correlation (DIC) was employed to test the surface strain of concrete, and the hollow reinforcing bar was adopted to test its internal surface strain. And the corroding stress model of reinforcing bar was derived based on the elastic mechanics theory. The results indicated that DIC and hollow reinforcing bar were effective for measuring the surface strain evolution of concrete and reinforcing bar. It could be observed by DIC that there was stress concentration on the groove edge of the concrete surface. And compressive stress occurred on the upper surface of the reinforcing bar, which leaded to the cracking of concrete cover. The constant potential accelerated corrosion with seawater penetration caused the non-uniform corrosion of the reinforcing bar in the concrete, resulting in the cracking of concrete at the corrosion stress of 3 MPa, and corrosion duration of 25 h.
|
|
Published: 12 July 2019
|
|
|
| Fund:This work was financially supported by Shandong Key Research and Development Project (2018GHY115020) and the National Natural Science Foundation of China (51678318). |
|
|
[1] Hou B R, Li X G, Ma X M, et al. Materials Degradation, 2017, 1(1), 1.
[2] Chen L T, Zhang S P, Zou G J, et al. Materials Protection, 2007, 40(5), 52 (in Chinese).
陈澜涛,张三平,邹国军,等.材料保护, 2007, 40(5), 52.
[3] Niu D T, Wang Q L. Industrial Construction, 1996, 26(4), 8(in Chinese).
牛荻涛,王庆霖.工业建筑, 1996, 26(4),8.
[4] Liu Y. ACI Materials Journal, 1998, 95(6), 675.
[5] Shen Y, Wang L F, Zhang C J. Value Engineering, 2016, 35(32), 134(in Chinese).
沈阳,王丽芬,张昌进.价值工程, 2016, 35(32), 134.
[6] Destrebecq J F, Toussaint E, Ferrier E. Experimental Mechanics, 2011, 51(6), 879.
[7] Yamaguchi I. Journal of Physics E Scientific Instruments, 2000, 14(11), 1270.
[8] Peters W H, Ranson W F. Optical Engineering, 1982, 21(3), 213427.
[9] Iskander M. Materials Today, 2010, 13(12), 52.
[10] Gencturk B, Hossain K, Kapadia A, et al. Measurement, 2014, 47(1), 505.
[11] Han Y Y, Liu N S, Cai Y C. Journal of Civil and Enviromental Enginee-ring, 2015(s2), 51 (in Chinese).
韩依颖, 刘乃盛, 蔡永昌. 土木建筑与环境工程, 2015(s2),51.
[12] Jin W L, Zhao Y X. Durability of concrete structures, Science Press, China, 2014 (in Chinese).
金伟良, 赵羽习. 混凝土结构耐久性,科学出版社,2014.
[13] Niu D T. Durability and life forecast of reinforced concrete structure, Scie-nce Press, China, 2003 (in Chinese).
牛荻涛. 混凝土结构耐久性与寿命预测,科学出版社, 2003.
[14] Jin Z Q, Zhao X, Zhao T J, et al. Construction & Building Materials, 2016, 113, 805.
[15] Xu Z L. Elastic mechanics theory, Higher Education Press, China, 2013(in Chinese).
徐芝纶. 弹性力学简明教程, 高等教育出版社,2013. |
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
2019, Vol. 33 
