کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4923367 1430698 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of external confinement on structural performance of concrete-filled steel tubes
ترجمه فارسی عنوان
اثرات محوطه خارجی بر عملکرد ساختمانی لوله های فولادی پر شده از بتن
کلمات کلیدی
محصور شدن بتن، لوله های فولادی پر شده از بتن، شکل پذیری، محصور خارجی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
The provision of external confinement in the forms of either FRP wraps or steel rings to concrete-filled steel tubes (CFST) would alleviate delamination at steel-concrete interface and increase both strength and ductility. To investigate the effectiveness of such external confinement, a parametric study on the effects of external confinement on the structural performance of CFST has been conducted. The axial and lateral stress-strain models of confined concrete previously developed by the authors were used in the study. The parameters studied include the concrete strength, steel tube yield strength and thickness, FRP confining stiffness and rupture strain, and steel ring yield strength and equivalent thickness, while the performance attributes evaluated include the yield strength, ultimate strength and ductility of the externally confined CFST. From the study, an equation for the minimum confining stiffness to avoid delamination is derived, formulas for predicting the yield and ultimate strengths are developed and charts for achieving Level I ductility are presented.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Constructional Steel Research - Volume 132, May 2017, Pages 72-82
نویسندگان
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