Damage evaluation of concrete based on Brillouin corrosion expansion sensor. (15th July 2017)

• Record Type: Journal Article
• Authors: Lv, Haifeng; Zhao, Xuefeng; Zhan, Yilin; Gong, Peng
• Is Part Of: Construction & building materials. Volume 143(2017)
• Page Start: 387
• Page End: 394
• Publication Date: 2017-07-15
• Subjects: Corrosion -- BOTDA -- Damage factor -- Cracking -- Finite element (FE); Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2017.03.122
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: The sensor of expansion strain of steel corrosion was designed and tested. Expansion strain of steel corrosion was monitored by BOTDA. Damage factor was proposed to quantitatively evaluate the damage degree of concrete. The monitoring method which proposed in this study makes monitoring and evaluation in real-time come true. 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.