کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6723748 | 503603 | 2014 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Residual crack extension resistance of post-fire wedge-splitting normal strength concrete specimen based on the cohesive force function
ترجمه فارسی عنوان
مقاومت در برابر ترک خوردگی باقیمانده از نمونه بتنی طبیعی استحکام طبیعی بعد از آتش بر اساس عملکرد نیروی پیوستگی
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کلمات کلیدی
مقاومت در برابر گسترش، استرس انسانی، منحنی نرم کردن، تابع وزن، استحکام بتن سبک، گوه شکسته، چقرمگی شکستگی، تجزیه و تحلیل ثبات،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
A comparative study on determining the crack extension resistance curves (KR-curves) for the complete fracture process associated with two functions of the cohesive stress distribution, i.e. Peterson's softening curve and CEB-FIP Model, 1990 softening curve using an analytical method and the weight function approach is presented in this paper. Fifty wedge-splitting normal strength concrete specimens were prepared to sustain ten different elevated temperatures up to 600 °C. The stress intensity factor curves (K-curves) were calculated from the load-displacement curves obtained on these post-fire specimens. At each temperature, the residual fracture toughness KR(Îa) increased with the crack extension length Îa, whereas the KR-curves became lower and flatter with the increasing heating temperatures Tm. It was found that the KR-curve calculated from the weight function method coincided well with the one from the analytical method, whereas different softening curves had observable effects on the KR-curves. The stability of the KR-curve and the influence of temperatures on the crack tip opening displacement-crack extension curves (CTOD-Îa curves) were also analyzed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 54, 15 March 2014, Pages 270-281
Journal: Construction and Building Materials - Volume 54, 15 March 2014, Pages 270-281
نویسندگان
Yu Kequan, Lu Zhoudao,