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Indexed by:期刊论文

Date of Publication:2017-07-15

Journal:CONSTRUCTION AND BUILDING MATERIALS

Included Journals:SCIE、EI、Scopus

Volume:143

Page Number:387-394

ISSN No.:0950-0618

Key Words:Corrosion; BOTDA; Damage factor; Cracking; Finite element (FE)

Abstract:To evaluate the damage degree of reinforced concrete due to steel bar corrosion, a damage factor is proposed to quantitatively evaluate the damage degree of concrete before initial cracking and during the development of cracks. Brillouin optical fiber time domain analysis (BOTDA) sensors are fabricated to monitor the expansion strain of steel corrosion. Two concrete specimens embedded with corrosion sensors are cast. An accelerated corrosion experimental program is used to accelerate the process of steel corrosion. The experimental results show that the corrosion sensor can be used to monitor the expansion strain of steel corrosion in real-time. At last, to map the monitoring results with the damage factor, finite element analysis is used to simulate the process of steel corrosion to determine the cracking strain of the interfacial concrete and concrete cover. (C) 2017 Elsevier Ltd. All rights reserved.