Meso-scale numerical study on the non-uniform corrosion-induced cracking of confined concrete. (10th November 2020)

• Record Type: Journal Article
• Authors: Wu, Bo; Yang, Yang; Zhang, Liangliang; Wang, Yuanchao; Li, Haohong
• Is Part Of: Construction & building materials. Volume 260(2020)
• Publication Date: 2020-11-10
• Subjects: Meso-scale model -- Non-uniform corrosion -- Confined concrete -- Corrosion-induced cracking -- Surrounding structure -- Random aggregate; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2020.120463
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: A method is proposed to establish concrete models with a high ratio of aggregates. The constraints surrounding the concrete model are considered. The cracking behaviors of concrete due to non-uniform rebar corrosion are studied. The effects of aggregate, cover thickness, rebar, tensile strength are analyzed. Abstract: Concrete cracking due to rebar corrosion is an important engineering pathology. Most of the numerical studies were based on the concrete models with normal volume ratios of aggregates and didn't consider the surrounding constraints. We propose a new algorithm to generate aggregates of a high volume ratio and establish the meso-scale concrete model with consideration of the surrounding constraints. The model is verified against available experimental results. Then, a series of simulations are carried out to analyze the failure pattern of concrete caused by non-uniform rebar corrosion. The influences of surrounding structures, spatial and size distributions of aggregates, cover thickness, rebar diameter, and concrete tensile strength are discussed.