کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6736825 1429058 2018 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Prediction of shear strength of reinforced concrete beams using displacement control finite element analysis
ترجمه فارسی عنوان
پیش بینی مقاومت برشی بتن های بتن مسلح با استفاده از کنترل جابجایی تجزیه و تحلیل عناصر محدود
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی
This research resulted in the development of a new method for performing displacement control analysis of distributed loads to obtain the ultimate shear strength of structural components. A framework, consisting of several sub-frames, was designed to convert the single displacement applied at the top of the framework to equivalent uniformly-distributed forces applied to the beam. The shear capacity of beams under a concentrated load at mid-span was compared with the shear capacity of a uniform load for four different a/d ratios (3, 4, 5, and 7). The results indicated that the strain in the longitudinal rebar, which is dependent upon the loading condition, strongly impacts the shear strength of a critical section of structural components. The shear strength of the critical section of the R.C. beams studied in this research had uniformly distributed loads that were, on average, 76% greater than the shear strength of the same beam with a concentrated load at mid-span. The shear strength prediction of the AASHTO specification as well as ACI318-14 code were evaluated for beams with shear behavioral mode. A parametric study of 24 RC beams was conducted, and the results indicated that AASHTO's prediction for strain in longitudinal rebar differs about 19%, on average, from the results of the finite element method (FEM). For prediction of the β factor, however, the difference is about 61%. The ACI318-14's formulation for the concrete shear strength (Vc) averages 59% higher than the FEM results for the studied beams.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 169, 15 August 2018, Pages 226-237
نویسندگان
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