{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T10:29:29Z","timestamp":1777372169845,"version":"3.51.4"},"reference-count":22,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2015,4,15]],"date-time":"2015-04-15T00:00:00Z","timestamp":1429056000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51408544\uff0c51408534\uff0c51208459"],"award-info":[{"award-number":["51408544\uff0c51408534\uff0c51208459"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004731","name":"Natural Science Foundation of Zhejiang Province","doi-asserted-by":"publisher","award":["LQ14E080007"],"award-info":[{"award-number":["LQ14E080007"]}],"id":[{"id":"10.13039\/501100004731","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100007834","name":"Natural Science Foundation of Ningbo","doi-asserted-by":"publisher","award":["2013A610191"],"award-info":[{"award-number":["2013A610191"]}],"id":[{"id":"10.13039\/100007834","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Science and Technology Service Project of Ningbo","award":["2014F10016"],"award-info":[{"award-number":["2014F10016"]}]},{"name":"Ningbo Scientific and Technological Innovation Team","award":["2011B81005"],"award-info":[{"award-number":["2011B81005"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Expansion and cracking induced by the corrosion of reinforcement concrete is the major factor in the failure of concrete durability. Therefore, monitoring of concrete cracking is critical for evaluating the safety of concrete structures. In this paper, we introduce a novel monitoring method combining Brillouin optical time domain analysis (BOTDA) and fiber Bragg grating (FBG), based on mechanical principles of concrete expansion cracking. BOTDA monitors concrete expansion and crack width, while FBG identifies the time and position of cracking. A water-pressure loading simulation test was carried out to determine the relationship between fiber strain, concrete expansion and crack width. An electrical accelerated corrosion test was also conducted to evaluate the ability of this novel sensor to monitor concrete cracking under practical conditions.<\/jats:p>","DOI":"10.3390\/s150408866","type":"journal-article","created":{"date-parts":[[2015,4,15]],"date-time":"2015-04-15T10:51:24Z","timestamp":1429095084000},"page":"8866-8883","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":55,"title":["Monitoring the Corrosion Process of Reinforced Concrete Using BOTDA and FBG Sensors"],"prefix":"10.3390","volume":"15","author":[{"given":"Jianghong","family":"Mao","sequence":"first","affiliation":[{"name":"Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiayun","family":"Chen","sequence":"additional","affiliation":[{"name":"Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lei","family":"Cui","sequence":"additional","affiliation":[{"name":"Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Weiliang","family":"Jin","sequence":"additional","affiliation":[{"name":"Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China"},{"name":"Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chen","family":"Xu","sequence":"additional","affiliation":[{"name":"Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yong","family":"He","sequence":"additional","affiliation":[{"name":"Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2015,4,15]]},"reference":[{"key":"ref_1","first-page":"754","article-title":"Time-Dependent Risk Assessment of Structural Deterioration Caused by Reinforcement Corrosion","volume":"102","author":"Li","year":"2005","journal-title":"ACI Struct. J."},{"key":"ref_2","first-page":"30","article-title":"In-Situ Monitoring and Early Warning System for Durability of Concrete Structure of Hangzhou Bay Sea-Crossing Bridge","volume":"23","author":"Gan","year":"2010","journal-title":"China J. Highw. Trans."},{"key":"ref_3","unstructured":"Sudarshan, S., Basheer, P.A.M., Mao, J.H., Jin, W.L., and McCarter, W.J. (2013, January 7\u201311). An Integrated Sensing System for Monitoring the Corrosion Activity in Concrete Blocks Exposed at Hangzhou Bay Bridge. Proceedings of the Second Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures, Istanbul, Turkey."},{"key":"ref_4","first-page":"939","article-title":"Analysis on the Cracking of Concrete Cover due to Rebar Corrosion","volume":"36","author":"Zhao","year":"2005","journal-title":"J. Hydraul. Eng."},{"key":"ref_5","unstructured":"Ghandehari, M., and Vimer, C. (2002, January 2\u20135). Fiber Optic Chemo-Sensing for Civil Infrastructure. Proceedings of the 15th ASCE Engineering Mechanics Conference, New York, NY, USA."},{"key":"ref_6","unstructured":"Melhorn, K., Flachsbarth, J., Kowalsky, W., and Johannes, H.H. (2007, January 11\u201313). Novel Sensors for Long-Term Monitoring of pH and Humidity in Concrete. Proceedings of the 6th IWSHM Conference, Stanford, CA, USA."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"248","DOI":"10.1088\/0964-1726\/7\/2\/012","article-title":"Continuous Arbitrary Strain Profile Measurements with Fiber Bragg Gratings","volume":"7","author":"Huang","year":"1998","journal-title":"Smart Mater. Struct."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"259","DOI":"10.1007\/BF02480424","article-title":"Application of Fiber Bragg Grating in Local and Remote Infrastructure Health Monitoring","volume":"31","author":"Saouma","year":"1998","journal-title":"Mater. Struct."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"78","DOI":"10.1016\/S0924-4247(04)00546-1","article-title":"Integration and Assessment of Fibre Bragg Grating Sensors in an All-Fibre Reinforced Polymer Composite Road Bridge","volume":"118","author":"Gebremichael","year":"2005","journal-title":"Sens. Actuators A Phys."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"17002","DOI":"10.1088\/0957-0233\/21\/1\/017002","article-title":"A Structural Corrosion-Monitoring Sensor Based on a Pair of Prestrained Fiber Bragg Gratings","volume":"21","author":"Lee","year":"2010","journal-title":"Meas. Sci. Technol."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"15820","DOI":"10.3390\/s121115820","article-title":"Optical-Based Sensors for Monitoring Corrosion of Reinforcement Rebar via an Etched Cladding Bragg Grating","volume":"12","author":"Hassan","year":"2012","journal-title":"Sensors"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"125018","DOI":"10.1088\/0964-1726\/20\/12\/125018","article-title":"A Novel Method of Embedding Distributed Optical Fiber Sensors for Structural Health Monitoring","volume":"20","author":"Mao","year":"2011","journal-title":"Smart Mater. Struct."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"10798","DOI":"10.3390\/s111110798","article-title":"Brillouin Corrosion Expansion Sensors for Steel Reinforced Concrete Structures Using a Fiber Optic Coil Winding Method","volume":"11","author":"Zhao","year":"2011","journal-title":"Sensors"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"41","DOI":"10.12989\/sss.2014.13.1.041","article-title":"Feasibility Study on Corrosion Monitoring of a Concrete Column with Central Rebar Using BOTDR","volume":"13","author":"Sun","year":"2014","journal-title":"Smart Struct. Syst."},{"key":"ref_15","first-page":"1147","article-title":"Experimental Research on Monitoring Concrete Expansion and Cracking Induced by Corrosion Based on Distributed Optical Fiber Sensor","volume":"27","author":"Mao","year":"2014","journal-title":"Chin. J. Sens. Actuators"},{"key":"ref_16","unstructured":"Mao, J.H., Jin, W.L., Xiong, Y.J., Wang, Q., He, Y., and Zhang, J. (2014, January 23\u201326). Experimental Research on Corrosion-Induced Cracking Monitoring Based on Optical Fiber Sensor. Proceedings of the 4th International Conference on the Durability of Concrete Structures, West Lafayette, IN, USA."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"486","DOI":"10.1117\/12.482682","article-title":"Distributed Strain and Temperature Measurement of a Beam Using Fiber Optic Botda Sensor","volume":"5057","author":"Kwon","year":"2003","journal-title":"Proc. SPIE"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"2234","DOI":"10.1016\/j.ijleo.2009.12.004","article-title":"Data Processing in BOTDR Distributed Strain Measurement Based on Pattern Recognition","volume":"121","author":"Ding","year":"2010","journal-title":"Opt. Int. J. Light Electron Opt."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Othonos, A., and Kalli, K. (1999). Fiber Bragg Gratings: Fundamentals and Applications in Telecommunications and Sensing, Artech House.","DOI":"10.1007\/978-1-4757-6079-8_2"},{"key":"ref_20","first-page":"675","article-title":"Modeling the Time-to-Corrosion Cracking in Chloride Contaminated Reinforced Concrete Structures","volume":"95","author":"Liu","year":"1998","journal-title":"ACI Mater. J."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"4300","DOI":"10.1016\/j.corsci.2011.08.045","article-title":"Non-Uniform Distribution of Rust Layer Around Steel Bar in Concrete","volume":"53","author":"Zhao","year":"2011","journal-title":"Corros. Sci."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"163","DOI":"10.1016\/j.corsci.2012.08.016","article-title":"A Study of the Elastic Moduli of Corrosion Products Using Nano-Indentation Techniques","volume":"65","author":"Zhao","year":"2012","journal-title":"Corros. Sci."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/15\/4\/8866\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T20:44:47Z","timestamp":1760215487000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/15\/4\/8866"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015,4,15]]},"references-count":22,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2015,4]]}},"alternative-id":["s150408866"],"URL":"https:\/\/doi.org\/10.3390\/s150408866","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2015,4,15]]}}}