کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
266394 504358 2015 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of moment redistribution and compressive membrane action on punching strength of flat slabs
ترجمه فارسی عنوان
تأثیر بازتوزیع لحظه و عمل غشاء فشاری بر مقاومت پانچی اسلبهای صاف
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی


• Numerical model compares the behavior of isolated specimens and actual flat slabs.
• Moment redistribution and membrane action stiffen the response of continuous slabs.
• Comparisons to unusual tests from the literature validate the numerical model.
• The physical approach of CSCT allows predicting the punching capacities.
• Actual slabs may show higher capacities than predicted by existing design methods.

The punching shear strength of interior column connections of flat slabs has traditionally been investigated with isolated test specimens subjected exclusively to hogging bending moments. However, the behavior of such specimens is different from that of actual flat slabs, as the potentially beneficial phenomena of moment redistribution between hogging and sagging moments and compressive membrane action cannot take place in the conventional experiments. In the present paper, an axisymmetric numerical model is introduced that allows analyzing the role and significance of these effects on the flexural deformations of continuous flat slabs. Combined with the failure criterion of the Critical Shear Crack Theory, this model can be used to predict the punching capacities of such slabs. Comparisons are made to the results of some unconventional punching tests from the literature showing sound agreement between the modeling results and the experimental observations. The results suggest that the punching capacity of continuous slabs with low amounts of flexural reinforcement in the interior column regions may be underestimated in the current codes of practice.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 86, 1 March 2015, Pages 43–57
نویسندگان
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