کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
278187 1430269 2012 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Two-phase damage modeling of concrete affected by alkali–silica reaction under variable temperature and humidity conditions
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Two-phase damage modeling of concrete affected by alkali–silica reaction under variable temperature and humidity conditions
چکیده انگلیسی

In the present work the concrete affected by alkali–silica reaction (ASR) is represented as a two-phase material made of a solid skeleton and a wet expanding gel, which exerts a pressure capable of severely damaging the concrete surrounding the reactive sites. Both the effects of temperature and humidity conditions on the kinetic of the chemical reaction and on the final value of the consequent expansion are included in the proposed model. The mechanical degradation induced by the ASR is described by a phenomenological isotropic damage model. The constitutive model, implemented in a finite element code, is used for the analyses of structures made of reactive concrete in the presence of temperature and moisture gradients. Firstly the temperature and humidity fields are obtained through uncoupled heat and moisture transport analyses and then the chemo-mechanical analysis is performed starting from the values of temperature and humidity preliminary calculated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volume 49, Issues 23–24, 15 November 2012, Pages 3367–3380
نویسندگان
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