دوره 5، شماره 2 - ( 12-1393 )                   جلد 5 شماره 2 صفحات 227-240 | برگشت به فهرست نسخه ها


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Dehghani H, Fadaee M J. OPTIMUM RESISTANCE FACTOR FOR REINFORCED CONCRETE BEAMS RETROFITTED WITH U-WRAP FRP. International Journal of Optimization in Civil Engineering. 2015; 5 (2) :227-240
URL: http://ijoce.iust.ac.ir/article-1-212-fa.html
OPTIMUM RESISTANCE FACTOR FOR REINFORCED CONCRETE BEAMS RETROFITTED WITH U-WRAP FRP. دانشگاه علم و صنعت ایران. 1393; 5 (2) :227-240

URL: http://ijoce.iust.ac.ir/article-1-212-fa.html


چکیده:   (1287 مشاهده)
The use of fiber reinforced polymer (FRP) U-wrap to rehabilitate concrete beams has increased in popularity over the past few years. As such, many design codes and guidelines have been developed to enable designers to use of FRP for retrofitting reinforced concrete beams. FIB is the only guideline for design which presents a formula for torsional capacity of concrete beams strengthened with FRP. The Rackwitz-Fiessler method was applied to make a reliability assessment on the torsional capacity design of concrete beams retrofitted with U-wrap FRP laminate by this guideline. In this paper, the average of reliability index obtained is 2.92, reflecting reliability of the design procedures. This value is somehow low in comparison to target reliability level of 3.5 used in the guideline calibration and so, optimum resistance factor may be needed in future guideline revisions. From the study on the relation between average reliability index and optimum resistance factor, a value of 0.723 for the optimum resistance factor is suggested.
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نوع مطالعه: پژوهشي | موضوع مقاله: Optimal design
دریافت: ۱۳۹۴/۱/۱۲ | پذیرش: ۱۳۹۴/۱/۱۲ | انتشار: ۱۳۹۴/۱/۱۲

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