کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4965741 1448463 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Deterministic size effect in concrete structures with account for chemo-mechanical loading
ترجمه فارسی عنوان
اثر اندازه گیری در سازه های بتنی با توجه به بارگذاری شیمیایی و مکانیکی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی
The work presented here is focused on examining the size effect in concrete structures subjected to different loading conditions, which include a chemo-mechanical interaction. The study involves extensive three dimensional finite element simulations, which incorporate a constitutive law with embedded discontinuity for tracing the propagation of damage pattern. The analysis deals with various mechanical scenarios that incorporate both a cohesive and frictional damage mechanism, as well as the effects of degradation of concrete triggered by continuing alkali-silica reaction (ASR). In the latter case, a chemo-plasticity framework is employed. The first set of simulations provides a deterministic assessment of the size effect in a series of three-point bending tests as well as compression tests. For continuing ASR, it is demonstrated that, by increasing the size of the structure, a spontaneous failure may occur under a sustained load. The numerical examples given here clearly show that the size effect is associated with propagation of localized damage whose rate is controlled by a suitably defined 'characteristic length'.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Structures - Volume 182, 1 April 2017, Pages 74-86
نویسندگان
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