کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6736756 | 1429058 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Performance of RC beams strengthened with self-prestressed Fe-SMA bars exposed to freeze-thaw cycles and sustained load
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
مهندسی ژئوتکنیک و زمین شناسی مهندسی
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چکیده انگلیسی
Iron-Based Shape Memory Alloys (Fe-SMA) have been recently used by researchers as a strengthening material for Reinforced Concrete (RC) beams. This material is relatively inexpensive compared to the traditional Nickel Titanium SMA (NiTi-SMA), which makes it feasible for large-scale structural engineering applications. The Fe-SMA is mainly characterized by the Shape Memory Effect (SME) phenomenon, which allows the material to recover the induced deformations through heating. When the pre-strained Fe-SMA bar/strip is anchored on the tension side of an RC beam using the Near-Surface Mounted (NSM) strengthening technique and is then heated to the activation temperature, a tension force (prestressing force) develops in the material, which results in enhancing the flexural capacity of the RC beam at service and ultimate load conditions. This paper investigates the long-term performance of RC beams strengthened with NSM Fe-SMA bars and exposed to severe freeze-thaw cycles and sustained loading. The results revealed that the strengthened beam was superior in flexural performance compared to the un-strengthened beam, and there was minimal degradation compared to other beams tested at room temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 169, 15 August 2018, Pages 107-118
Journal: Engineering Structures - Volume 169, 15 August 2018, Pages 107-118
نویسندگان
Hothifa Rojob, Raafat El-Hacha,