مشخصات مقاله | |
ترجمه عنوان مقاله | آزمایش غیر مخرب سازه های بتن مسلح با استفاده از امواج بازتابی زیر تراهرتز |
عنوان انگلیسی مقاله | Non-destructive testing of reinforced concrete structures using sub-terahertz reflected waves |
نشریه | الزویر |
انتشار | مقاله سال ۲۰۲۴ |
تعداد صفحات مقاله انگلیسی | ۱۲ صفحه |
هزینه | دانلود مقاله انگلیسی رایگان میباشد. |
نوع نگارش مقاله |
مقاله پژوهشی (Research Article) |
مقاله بیس | این مقاله بیس نمیباشد |
نمایه (index) | Scopus – Master Journals List – JCR |
نوع مقاله | ISI |
فرمت مقاله انگلیسی | |
ایمپکت فاکتور(IF) |
۶٫۶۲۱ در سال ۲۰۲۲ |
شاخص H_index | ۲۳ در سال ۲۰۲۴ |
شاخص SJR | ۱٫۳۷۴ در سال ۲۰۲۲ |
شناسه ISSN | ۲۶۶۶-۱۶۵۹ |
شاخص Quartile (چارک) | Q1 در سال ۲۰۲۲ |
فرضیه | ندارد |
مدل مفهومی | ندارد |
پرسشنامه | ندارد |
متغیر | دارد |
رفرنس | دارد |
رشته های مرتبط | مهندسی عمران |
گرایش های مرتبط | سازه – مدیریت ساخت – ساختمان های بتنی |
نوع ارائه مقاله |
ژورنال |
مجله | تحولات در محیط ساخته شده – Developments in the Built Environment |
دانشگاه | Tohoku University, 6-6-11-1209 Aoba Aramaki, Aoba-ku, Sendai, Miyagi, Japan |
کلمات کلیدی | موج زیر تراهرتز – سازه های بتن آرمه – دوربین – غیر مخرب – بدون تماس – ترک – میلگرد تعبیه شده |
کلمات کلیدی انگلیسی | Sub-terahertz wave – Reinforced concrete structures – Camera – Non-destructive – Non-contact – Cracks – Embedded rebar |
شناسه دیجیتال – doi |
https://doi.org/10.1016/j.dibe.2024.100423 |
لینک سایت مرجع | https://www.sciencedirect.com/science/article/pii/S2666165924001042 |
کد محصول | e17780 |
وضعیت ترجمه مقاله | ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید. |
دانلود رایگان مقاله | دانلود رایگان مقاله انگلیسی |
سفارش ترجمه این مقاله | سفارش ترجمه این مقاله |
فهرست مطالب مقاله: |
Abstract ۱ Introduction ۲ Measurement using Sub-THz waves ۳ Outline of experiment ۴ Preliminary test with concrete plate specimens ۵ Scanning test with concrete beam specimens ۶ On-site measurements on Gunkanjima ۷ Conclusion CRediT authorship contribution statement Declaration of competing interest Acknowledgement Data availability References |
بخشی از متن مقاله: |
Abstract Terahertz (THz) and sub-terahertz (sub-THz) waves are unexplored waves between the infrared and microwave ranges. This range features unique characteristics of both light resolution and electromagnetic wave transmission. Sub-THz waves are part of attractive new diagnostic methods for inner objects because they are safer than normal non-destructive inspection methods involving high energy, such as X-rays. In this study, a novel non-contact and non-destructive inspection method for reinforced concrete (RC) structures using sub-THz reflection imaging is proposed to inspect the deterioration of inaccessible damaged RC structures. The results of this study confirmed that the proposed sub-THz imaging method can detect cracks and voids in concrete, as well as in metals inside or behind the concrete, based on differences in reflectance. In addition, the camera-based measurement system makes real-time on-site field measurements possible.
Introduction In recent years, the deterioration of reinforced concrete (RC) structures has become an issue all over the world. Especially in Japan and other developed countries, large number of social infrastructures built during periods of rapid economic growth are aging significantly ( Alexander and Beushausen, 2019 ). The importance of appropriate maintenance management, including investigation and diagnosis, has been highlighted. In addition, from the perspective of a decarbonized society, it is desirable to avoid demolishing buildings and extend the service life of RC structures through necessary and affordable repairs. Thus, these considerations highlight a growing need for non-contact, non-destructive inspection methods to diagnose infrastructure deterioration without compromising performance. Furthermore, if remote inspection is possible, it is expected to improve measurement efficiency and expand the applicable areas. Therefore, a new inspection method that is not only non-destructive but also non-contact is required. Several non-destructive and micro-destructive testing methods have been proposed for RC structures. For example, for internal defects that cannot be detected by visual inspection, some of the most widely used methods include percussion inspection ( Kazemi et al., 2019 ), ultrasonic flaw detection ( Lawson et al., 2011 ; Choi et al., 2016 ) and ground penetrating radar (GPR) ( Hugenschmidt and Mastrangelo, 2006 ; Chang et al., 2009 ; Laurens et al., 2005 ; Liu et al., 2020 ; Wiwatrojanagul et al., 2017 ). Table 1 shows a comparison between these methods. During percussion inspection, the concrete surface is knocked, which makes it possible to infer the state of internal deterioration based on the difference in the echo sound. In the case of ultrasonic waves, also a type of elastic wave, it is possible to measure the location of cracks and rebars inside concrete due to differences in acoustic impedance inside the material. Using GPR makes it possible to probe embedded rebars and voids inside concrete owing to its high penetration depth. However, these methods require contact with an object to be measured, which causes measurement problems at elevated or generally inaccessible places, thus highlighting the need for developing a method that can inspect the interior of concrete without contact.
Conclusion In this study, we conducted measurements using a sub-THz camera to simulate embedded rebar and defects on the surface and inside concrete, assuming that a non-destructive inspection method using sub-THz waves will be applied to reinforced concrete structures. We then conducted actual measurements on real structures. The findings are as follows: ۱) An aluminum tape placed on the back of the specimen to simulate the embedded rebar was detected up to 20 mm thickness of the specimen. ۲) Field measurements at 10 GHz indicated the possibility of exploring rebars with a cover thickness of approximately 30 mm. ۳) In the measurement of specimens with slits simulating cracks, detection was possible for slit widths greater than 1 mm. ۴) Even when the slit was hidden by placing a 5-mm-thick mortar, detecting a slit up to 2.5 mm was possible. ۵) The reflectance and transmittance varied sensitively with frequency. This fact indicates the potential for more detailed measurement with the selected appropriate frequencies. Further studies are needed to establish their relationship. ۶) Camera-based measurement enables areal measurement and real-time monitoring. ۷) Downsizing and weight reduction of the measurement system improved its transportability, confirming the possibility of measuring real structures. |