فناوری کنونی کامپوزیتهای FRP در پلهای بزرگراه
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فناوری کنونی کامپوزیتهای FRP در پلهای بزرگراه

عنوان فارسی مقاله: فناوری کنونی کامپوزیتهای FRP در پلهای بزرگراه
عنوان انگلیسی مقاله: State of the practice of FRP composites in highway bridges
مجله/کنفرانس: سازه های مهندسی - Engineering Structures
رشته های تحصیلی مرتبط: مهندسی عمران
گرایش های تحصیلی مرتبط: سازه، مدیریت ساخت
کلمات کلیدی فارسی: مطالعه موردی، پلاستیک تقویت شده با الیاف (FRP)، زیرساخت، فناوری کنونی
کلمات کلیدی انگلیسی: Case study، Fiber reinforced polymer (FRP)، Infrastructure، State of the practice
نوع نگارش مقاله: مقاله کوتاه (Short Communication)
نمایه: Scopus - Master Journal List - JCR
شناسه دیجیتال (DOI): https://doi.org/10.1016/j.engstruct.2018.10.067
دانشگاه: Department of Civil Engineering, University of Colorado Denver, Denver, CO 80217, United States
ناشر: الزویر - Elsevier
نوع ارائه مقاله: ژورنال
نوع مقاله: ISI
سال انتشار مقاله: 2019
ایمپکت فاکتور: 3/167 در سال 2017
شاخص H_index: 104 در سال 2019
شاخص SJR: 1/69 در سال 2017
شناسه ISSN: 0141-0296
شاخص Quartile (چارک): Q1 در سال 2019
فرمت مقاله انگلیسی: PDF
تعداد صفحات مقاله انگلیسی: 8
وضعیت ترجمه: ترجمه نشده است
قیمت مقاله انگلیسی: رایگان
آیا این مقاله بیس است: خیر
کد محصول: E11000
فهرست انگلیسی مطالب

Abstract


1- Introduction


2- Research significance


3- State-of-current-practice survey


4- Summary and conclusions


References

نمونه متن انگلیسی مقاله

Abstract


This case study presents the use of fiber reinforced polymer (FRP) composites in highway infrastructure. The state of current practice of FRP materials is established through a survey questionnaire and follow-up interviews with 46 responding transportation jurisdictions in North America (44 United States Departments of Transportation and 2 Canadian agencies) to identify current challenges requiring technical and administrative efforts to facilitate the employment of this promising construction material. FRP composites for infrastructure projects are generally satisfactory and promising. Most agencies have used FRP since 1996, although some agencies reveal pioneering endeavors in the early 1990s. The nature of construction projects determines whether FRP applications are experimental or a standard practice. The survey shows that CFRP-strengthening for upgrading bridge piers (primarily columns) is the most accepted standard practice, followed by GFRP-reinforced bridge decks. Challenges experienced by the responding agencies are detailed and analyzed. Various tests at material and structure levels are conducted to examine the performance of structural members constructed with FRP composites. Despite these endeavors, the long-term durability of in-situ FRP still requires additional research to generate technical data and to convince end-users. Lessons learned from sites are elaborated to assist practitioners who are interested in FRP-based projects. The majority of respondents state that more training is necessary to help understand the use of FRP composites in construction projects.


Introduction


The sustainability of highway infrastructure is one of the most crucial research/practice needs in the United States. Constructed facilities deteriorate owing to physical and environmental factors, and may become structurally deficient. There are a number of contributors to such deterioration; for example, water, ultraviolet radiations, temperature, freeze-thaw, traffic load, impact, and chemicals. Accordingly, structural members do not meet their expected design life. The loadbearing capacity of these members may decrease as their physical properties change, leading to public safety concerns. The members’ durability performance is also affected by the degree of deterioration (e.g., steel reinforcing bars become vulnerable to corrosion, when concrete surrounding the bars cracks or spalls). Transportation agencies are eager for alternative construction materials, which will enable them to extend the longevity of existing structural members in an economical manner. Fiber reinforced polymer (FRP) composites are a promising material and have shown excellent performance with numerous advantages. Examples involve favorable strength-to-weight ratio, noncorrosiveness, reasonable labor, rapid execution, and reduced long-term maintenance costs [2,3]. The application range of FRP materials is broad from internal reinforcing to external strengthening [7,10,9,4]. Various FRP materials and types (e.g., sheets, laminates, structural shapes, bars, and tendons) are available for highway infrastructure [1]. Further details on the various aspects of FRP applications (e.g., durability, statistical characteristics, test methods, and long-term performance) are expounded in state-of-the-art papers [8,5,6]. Although significant advancements have been made over the last two decades from research standpoints, FRP composites have not been widely adopted by state departments of transportation (DOT), including the Ministry of Transportation in Canadian Provinces, because of their high material costs, a lack of design guidelines or specifications, procurement, and relatively short application history. The FRP community is not properly informed of the contents related to the following questions: how the developed technologies are actually employed and how decision-making authorities consider such technologies in their projects. Given that the ultimate goal of all research activities is to provide end-use sectors with necessary information, answers to these questions are as important as technical investigations. This case study discusses the state of the practice of FRP composites for highway infrastructure. So informed, both transportation agencies and researchers will be aware of barriers that impede the use of FRPs and will identify directions toward future research and planning.

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