کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1740120 1017324 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of seismic shear capacity of prestressed concrete containment vessels with fiber reinforcement
ترجمه فارسی عنوان
ارزیابی ظرفیت برشی لرزه ای از مخازن محافظ بتن پیش بارده با تقویت فیبر
کلمات کلیدی
دیوار برشی بتن، فایبر بتن، مدل هیسترتیک، الیاف پلی آمید، مخزن انسداد بتن پیش رونده، ظرفیت برش لرزه ای، الیاف فولادی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
چکیده انگلیسی

BackgroundFibers have been used in cement mixture to improve its toughness, ductility, and tensile strength, and to enhance the cracking and deformation characteristics of concrete structural members. The addition of fibers into conventional reinforced concrete can enhance the structural and functional performances of safety-related concrete structures in nuclear power plants.MethodsThe effects of steel and polyamide fibers on the shear resisting capacity of a prestressed concrete containment vessel (PCCV) were investigated in this study. For a comparative evaluation between the shear performances of structural walls constructed with conventional concrete, steel fiber reinforced concrete, and polyamide fiber reinforced concrete, cyclic tests for wall specimens were conducted and hysteretic models were derived.ResultsThe shear resisting capacity of a PCCV constructed with fiber reinforced concrete can be improved considerably. When steel fiber reinforced concrete contains hooked steel fibers in a volume fraction of 1.0%, the maximum lateral displacement of a PCCV can be improved by > 50%, in comparison with that of a conventional PCCV. When polyamide fiber reinforced concrete contains polyamide fibers in a volume fraction of 1.5%, the maximum lateral displacement of a PCCV can be enhanced by ∼40%. In particular, the energy dissipation capacity in a fiber reinforced PCCV can be enhanced by > 200%.ConclusionThe addition of fibers into conventional concrete increases the ductility and energy dissipation of wall structures significantly. Fibers can be effectively used to improve the structural performance of a PCCV subjected to strong ground motions. Steel fibers are more effective in enhancing the shear performance of a PCCV than polyamide fibers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Engineering and Technology - Volume 47, Issue 6, October 2015, Pages 756–765
نویسندگان
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