نوع مقاله : پژوهشی
نویسندگان
1 گروه مهندسی عمران، دانشکده ی فنی و مهندسی، دانشگاه آزاد اسلامی مشهد
2 گروه مهندسی عمران، دانشکده ی مهندسی، دانشگاه فردوسی مشهد
3 گروه مهندسی عمران، دانشکده ی فنی و مهندسی، دانشگاه تگزاس ال پاسو، آمریکا
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
In this research, the effect of adding 0\% and 2\% volumetric percents of steel
fibers in beams containing three patches (43 cm, 34 cm, and 26 cm in length)
and recycled aggregate 0 and 100\% on the cracking and expansion path. The
cracks were examined under static loading. The purpose of this study is to
reduce the minimum crack width for adding steel fibers to reinforced concrete
beams made of recycled aggregates and tensile reinforcement patches. Hence,
twelve specimens of the beam were made at 150, 200, 1500 mm lengths with a
length of different tensile adherence rates and different percentages of steel
and recycled aggregates. The experiments were performed as a quadrilateral
bend. In experiments, the load-displacement curve in the middle of the span of
the specimens, the trajectory expansion along the beam and at the maximum
flexural anchor, the width of cracking, and the effect of adding steel fibers
on the compression and elongation of the specimens were indirectly
investigated. In addition, the results were compared with those presented in
the ACI, CSA, NS, CEB FIP, and EuroCode2 regulations. The results of the experiments showed that the addition of steel fibers reduced the slip of the
tensile reinforcement in the patched area and decreased the crack-cracking
width. Also, with addition of steel fibers in beams made of 2\% recycled
aggregate, the patch length can be reduced by 40\%.
کلیدواژه‌ها [English]
)