期刊
CEMENT AND CONCRETE RESEARCH
卷 108, 期 -, 页码 87-102出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2018.03.009
关键词
Non-uniform corrosion; Cohesive crack model; Meso-scale; Reinforced concrete structures; Finite element method
资金
- European Commission via the Marie Sklodowska-Curie H RISE [645696]
- National Key RD Plan of China [2016YFC0600803]
- China Scholarship Council at the University of Strathclyde, UK
- Marie Curie Actions (MSCA) [645696] Funding Source: Marie Curie Actions (MSCA)
Corrosion-induced concrete cracking is a significant durability problem for reinforced concrete structures. Considerable research has been carried out in the last few decades to understand and model the expansion mechanism of the corrosion products around the reinforcing bar and simulate the cracking behaviour of the concrete cover. In this paper, a new corrosion model based on non-uniform corrosion expansion is formulated and validated against experimental data. A meso-scale fracture model, consisting of aggregates, cement paste/mortar and ITZ, is established for the cases of both middle and side reinforcing bars. Under the developed corrosion and concrete fracture model, the cracking phenomena of the concrete cover are accurately simulated. It has been found that the non-uniform corrosion model can be used to express the realistic corrosion rust progression around the reinforcing bar, with the best accuracy. It has also been found that some microcracks occur before they are connected to form the dominating discrete crack which usually appears on the concrete surface. Moreover, the effects of the corrosion variables, as well as other key material and geometric parameters, on surface cracking of concrete are investigated.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据