کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6715403 | 1428740 | 2018 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Post-repair flexural performance of corrosion-damaged beams rehabilitated with fabric-reinforced cementitious matrix (FRCM)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
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چکیده انگلیسی
This paper presents the results of a research program examining the post-repair flexural response of corrosion-damaged reinforced concrete (RC) beams repaired with different FRCM systems. A total of nine RC beams were tested, including two beams that were neither corroded nor repaired, one beam that was corroded and not repaired, and six corroded-repaired beams that were prepared in two phases. Beams of phase I were subjected to an accelerated corrosion process for 210â¯days before being repaired whereas beams of phase II were initially subjected to accelerated corrosion for 70â¯days, then repaired and exposed to further corrosion for 140â¯days. Flexural test results showed that exposing the FRCM-repaired beams to corrosion after repair resulted in 23% reduction in steel mass loss. The use of U-shaped FRCM layers was more efficient in reducing the corrosion rate and increasing the ultimate strength of the repaired beams than the end-anchored FRCM layers. The PBO FRCM-repaired beams showed lower post-yielding stiffness and more ductility at failure than those of their carbon FRCM-repaired counterparts. Beams that experienced post-repair corrosive environment showed load-carrying capacities that ranged between 14 and 65% above those of the virgin beam. ACI 549.4R-13 provisions conservatively predict the ultimate capacities of the FRCM-repaired beams exposed to post-repair corrosive environment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 166, 30 March 2018, Pages 732-744
Journal: Construction and Building Materials - Volume 166, 30 March 2018, Pages 732-744
نویسندگان
Mohammed Elghazy, Ahmed El Refai, Usama Ebead, Antonio Nanni,