کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
779918 1464969 2016 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simplified nonlinear model for timber-concrete composite beams
ترجمه فارسی عنوان
مدل غیر خطی ساده برای پرتوهای کامپوزیتی بتونی
کلمات کلیدی
یکپارچگی بتن، آزمون خمش آزمون اتصالات برشی، رول فولادی، روش سفتی مخفی، مدل سازی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• A new 4-level up-scaling model from the connector to the TCC structure.
• FEM implementation of the non-linear Winkler beam model for the connection.
• FEM implementation of composite beam theory for non-linear connection and concrete.
• During cracking, the concrete axial stiffness provides satisfactory composite action.
• The composite action efficiently redistributes the concrete damage avoiding localization.

Timber-concrete composite (TCC) structures have been emerging in several industrial applications due to potential to simultaneously optimize their structural stiffness, dynamic vibration and ecological imprint. However, when one considers nonlinear behaviour of timber-to-concrete connections and the cracking of the concrete slab, the structural analysis of the composite system becomes quite complex. The scope of this article is to provide a powerful one-dimensional model accounting for the nonlinear behaviour of steel dowel connections and cracking of the concrete slab for better understanding the structural behaviour of TCC structures. First, we extended the existing Winkler model of a beam on an elastic foundation for calculating the load-slip deformation of a steel dowel connecting concrete to timber. Then, we extended the composite beam theory with the secant stiffness approach to account for the nonlinear behaviour of the connection and the cracking of concrete in a TCC beam. An original 4-level model for predicting the structural behaviour of a TCC beam starting from the behaviour of the steel dowel connection is developed by combining three upscaling models. The model has been implemented in a Finite Element Method and has been validated with experimental tests available in literature. An in-depth discussion of the results shows the usefulness of such simplified engineering model to better understand the structural behaviour of TCC beams in terms of the composite action, cracking distribution and structural ductility.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mechanical Sciences - Volume 117, October 2016, Pages 30–42
نویسندگان
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