کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7196221 | 1468308 | 2018 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Multi-linear stress-crack separation relationship for steel fiber reinforced concrete: Analytical framework and experimental evaluation
ترجمه فارسی عنوان
رابطه خط جداسازی تنش و چند خطی برای بتن آرمه فولادی: چارچوب تحلیلی و ارزیابی تجربی
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کلمات کلیدی
بتن آرمه ای فلزی، انرژی فاکتور، همبستگی تصویر دیجیتال، جداسازی تنش و کرک، انعطاف پذیر،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
An experimental evaluation of cracking and post-cracking behavior in the steel fiber reinforced concrete (SFRC) beams using the displacement field obtained from digital image correlation (DIC) is presented. The physical basis of the hinge-type behavior in flexure is established from an analysis of the displacement discontinuity across the crack. In SFRC beams, the load recovery following the localization of strain to a single crack is shown to be associated with opening of the hinge. An analytical framework for implementing a multi-linear stress-crack separation (Ï-w) relationship within the cracked hinge model is presented. Multi-linear Ï-w relations are obtained for SFRC with different fiber volume fractions (Vf) by an inversion procedure. The Ï-w relationship for SFRC exhibits an initial softening to values lower than the tensile strength which is followed by a stress recovery with increasing crack separation. In SFRC, the stress attains a constant value with increasing crack separation, larger than 1Â mm. For Vf equal to 0.75%, application of cracked hinge model predicts a constant stress of magnitude less than the tensile strength with increasing crack separation in the part of the load response associated with multiple cracking.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theoretical and Applied Fracture Mechanics - Volume 93, February 2018, Pages 33-43
Journal: Theoretical and Applied Fracture Mechanics - Volume 93, February 2018, Pages 33-43
نویسندگان
Sahith Gali, Kolluru V.L. Subramaniam,