Mesoscopic simulation of steel rebar corrosion process in concrete and its damage to concrete cover
Mesoscopic simulation of steel rebar corrosion process in concrete and its damage to concrete cover
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混凝土中钢筋腐蚀过程及其对混凝土保护层损伤的细观模拟
DOI：
10.1080/15732479.2016.1164730
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发表时间：
2017-04
影响因子：
3.7
通讯作者：
Ma Rujin
中科院分区：
文献类型：
--
作者：
Chen Airong;Pan Zichao;Ma Rujin
摘要 在大气或含氯环境中，钢筋腐蚀过程可分别由混凝土碳化或氯化物渗透引发。随着钢筋的腐蚀，钢筋周围的混凝土中会产生拉应力，当应力达到混凝土的抗拉强度时就会形成裂缝。本文主要利用细观尺度的晶格模型研究钢筋的均匀腐蚀和点蚀过程。首先，建立了钢筋均匀腐蚀和点蚀模型。其次，提出了一种基于晶格模型的集成程序来识别混凝土中的裂缝模式。采用已发表的实验结果来验证所提出的模型和方法。再次，对单根钢筋和多根钢筋的腐蚀过程、角部钢筋腐蚀过程、点蚀过程等典型情况进行了模拟。最后，研究了钢筋腐蚀对混凝土保护层的破坏。结果表明，与普通均匀钢筋腐蚀相比，角部钢筋腐蚀和点蚀会对混凝土保护层造成更严重的破坏。此外，多根钢筋的腐蚀会由于首先形成的横向裂缝而导致混凝土保护层更大规模的剥落。
Abstract In atmospheric or chlorine environment, the rebar corrosion process can be initiated by concrete carbonation or chloride penetration, respectively. Along with the rebar corrosion, tensile stress will occur in concrete around rebars, and cracks will be formed when the stress reaches the tensile strength of concrete. This paper mainly studies the uniform and pitting rebar corrosion processes by lattice model at meso-scale. Firstly, the models of uniform and pitting rebar corrosions are developed. Secondly, an integrated procedure based on the lattice model is proposed to identify the crack pattern in the concrete. Published experimental results are adopted to validate the proposed models and method. Thirdly, some typical cases such as the corrosion process of a single rebar and multi-rebars, rebar corrosion process in the corner and pitting corrosion processes are simulated. Finally, the damage of the rebar corrosion to the concrete cover is studied. The results show that the rebar corrosion in the corner and the pitting corrosion can result in a severer damage to the concrete cover compared with the ordinary uniform rebar corrosion. Furthermore, the corrosion of multi-rebar can result in a larger scale of concrete cover spalling due to the firstly formed transverse crack.
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影响因子：
7.4
作者：
Yuan, Yingshu;Ji, Yongsheng
通讯作者：
Ji, Yongsheng
影响因子：
7.4
作者：
Gadve, Sangeeta;Mukherjee, A.;Malhotra, S. N.
通讯作者：
Malhotra, S. N.
影响因子：
3.7
作者：
X. Ruan;Z. Pan
通讯作者：
X. Ruan;Z. Pan
影响因子：
10.5
作者：
B. Šavija;J. Pacheco;E. Schlangen
通讯作者：
B. Šavija;J. Pacheco;E. Schlangen
由于氯化物引起的腐蚀，腐蚀产物从钢筋渗透到混凝土中
影响因子：
8.3
作者：
Wong, H. S.;Zhao, Y. X.;Jin, W. L.
通讯作者：
Jin, W. L.