Crack Risk Evaluation of Early Age Concrete Based on the Distributed Optical Fiber Temperature Sensing
Cracks often appear in concrete arch dams, due to the thermal stress and low tensile strength of early age concrete. There are three commonly used temperature controlling measures: controlling the casting temperature, burying cooling pipe, and protecting the surface. However, because of the difficul...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/4082926 |
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| author | Nannan Shi Yanyu Chen Zhenbao Li |
| author_facet | Nannan Shi Yanyu Chen Zhenbao Li |
| author_sort | Nannan Shi |
| collection | DOAJ |
| description | Cracks often appear in concrete arch dams, due to the thermal stress and low tensile strength of early age concrete. There are three commonly used temperature controlling measures: controlling the casting temperature, burying cooling pipe, and protecting the surface. However, because of the difficulty to obtain accurate temperature and thermal stress field of the concrete, the rationality and economy of these measures are not assessed validly before and after construction. In this paper, a crack risk evaluation system for early age concrete is established, including distributed optical fiber temperature sensing (DTS), prediction of temperature and stress fields, and crack risk evaluation. Based on the DTS temperature data, the back-analysis method is applied to retrieve the thermal parameters of concrete. Then, the temperature and thermal stress of early age concrete are predicted using the reversed thermal parameters, as well as the laboratory test parameters. Finally, under the proposed cracking risk evaluation principle, the cracking risk level of each concrete block is given; the preliminary and later temperature controlling measures were recommended, respectively. The application of the proposed system in Xiluodu super high arch dam shows that this system works effectively for preventing cracks of early age concrete. |
| format | Article |
| id | doaj-art-e3596233b1b148f6ad8b591964458c5c |
| institution | OA Journals |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-e3596233b1b148f6ad8b591964458c5c2025-08-20T02:21:24ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422016-01-01201610.1155/2016/40829264082926Crack Risk Evaluation of Early Age Concrete Based on the Distributed Optical Fiber Temperature SensingNannan Shi0Yanyu Chen1Zhenbao Li2College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, ChinaDepartment of Mechanical Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794, USACollege of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, ChinaCracks often appear in concrete arch dams, due to the thermal stress and low tensile strength of early age concrete. There are three commonly used temperature controlling measures: controlling the casting temperature, burying cooling pipe, and protecting the surface. However, because of the difficulty to obtain accurate temperature and thermal stress field of the concrete, the rationality and economy of these measures are not assessed validly before and after construction. In this paper, a crack risk evaluation system for early age concrete is established, including distributed optical fiber temperature sensing (DTS), prediction of temperature and stress fields, and crack risk evaluation. Based on the DTS temperature data, the back-analysis method is applied to retrieve the thermal parameters of concrete. Then, the temperature and thermal stress of early age concrete are predicted using the reversed thermal parameters, as well as the laboratory test parameters. Finally, under the proposed cracking risk evaluation principle, the cracking risk level of each concrete block is given; the preliminary and later temperature controlling measures were recommended, respectively. The application of the proposed system in Xiluodu super high arch dam shows that this system works effectively for preventing cracks of early age concrete.http://dx.doi.org/10.1155/2016/4082926 |
| spellingShingle | Nannan Shi Yanyu Chen Zhenbao Li Crack Risk Evaluation of Early Age Concrete Based on the Distributed Optical Fiber Temperature Sensing Advances in Materials Science and Engineering |
| title | Crack Risk Evaluation of Early Age Concrete Based on the Distributed Optical Fiber Temperature Sensing |
| title_full | Crack Risk Evaluation of Early Age Concrete Based on the Distributed Optical Fiber Temperature Sensing |
| title_fullStr | Crack Risk Evaluation of Early Age Concrete Based on the Distributed Optical Fiber Temperature Sensing |
| title_full_unstemmed | Crack Risk Evaluation of Early Age Concrete Based on the Distributed Optical Fiber Temperature Sensing |
| title_short | Crack Risk Evaluation of Early Age Concrete Based on the Distributed Optical Fiber Temperature Sensing |
| title_sort | crack risk evaluation of early age concrete based on the distributed optical fiber temperature sensing |
| url | http://dx.doi.org/10.1155/2016/4082926 |
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