کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8906422 1634411 2018 47 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Accumulated permanent strain and critical dynamic stress of frozen silty clay under cyclic loading
ترجمه فارسی عنوان
پوسیدگی دائمی و استرس انتقالی دائمی از خاکستری سیلتی منجمد تحت بارگذاری سیکل
کلمات کلیدی
خاک منجمد، فشار پلاستیکی انباشته، استرس پویای انتقادی، وضعیت استرس اولیه،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
A series of dynamic triaxial experiments have been conducted to study the dynamic properties of the frozen soil from the subgrade along the Qinghai-Tibet Railway. Under long term cyclic loading, the effects of initial stress state and stress level on cumulative permanent strain and critical dynamic stress were studied in the paper. The results indicate that the influence of dynamic amplitude on the curve of cumulative permanent strain versus cyclic loading number is significant. Besides, based on the shakedown concept, curves of cumulative permanent strain versus cyclic loading number under different initial mean stress and deviatoric stress can be separated to three possible categories of plastic shakedown, plastic creep and incremental collapse. In addition, the critical dynamic stress of frozen soil under specific condition is obtained, and the analysis on critical dynamic stress at different stress state is presented. Therefore, this study could provide an innovative approach for permanent deformation behavior analysis. Furthermore, it is important for practical design and evaluation on stability of frozen soil in the subgrade.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cold Regions Science and Technology - Volume 153, September 2018, Pages 130-143
نویسندگان
, , , , ,