کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
805337 905133 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Strength modelling of geomaterials with random systems of structural joints
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Strength modelling of geomaterials with random systems of structural joints
چکیده انگلیسی

Strong-geomaterial samples–such as monolithic rock, concrete, and firm clay–are often weakened by random discontinuities called weak joints (fissures, cracks). The paper focuses on a theoretical strength evaluation of such samples using standard methods of series reliability systems; it is assumed that the shearing failure modes generated by structural joints are independent elements of the system. Special attention is paid to the number kk of elements in the system which is randomized by making use of the Poisson probability distribution. Closed-form solutions for the random strength of samples, i.e. distribution functions, are derived for randomly equivalent continua, both anisotropic and isotropic. In particular, such solutions can yield the average strength of the structured sample (the homogenized or the effective one) and its higher-order moments, etc. The examples reveal a strong reduction of the strength if weak joints concentrate around some critical angles, but primarily if the number of discontinuities increases.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Probabilistic Engineering Mechanics - Volume 26, Issue 2, April 2011, Pages 321–330
نویسندگان
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