کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6746876 1429441 2018 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical study on maximum reinforcement tensile forces in geosynthetic reinforced soil bridge abutments
ترجمه فارسی عنوان
مطالعه عددی بر حداکثر نیروهای کششی تقویت شده در آبراهه های خاکی تقویت شده ژئوسنتتیک
کلمات کلیدی
ژئوسنتتیک، خاک تقویت شده ژئوسنتتیک، آستانه پل مدل سازی عددی، ثبات داخلی، نیروی کششی،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی
This paper presents a numerical study of maximum reinforcement tensile forces for geosynthetic reinforced soil (GRS) bridge abutments. The backfill soil was characterized using a nonlinear elasto-plastic constitutive model that incorporates a hyperbolic stress-strain relationship with strain softening behavior and the Mohr-Coulomb failure criterion. The geogrid reinforcement was characterized using a hyperbolic load-strain-time constitutive model. The GRS bridge abutments were numerically constructed in stages, including soil compaction effects, and then loaded in stages to the service load condition (i.e., applied vertical stress = 200 kPa) and finally to the failure condition (i.e., vertical strain = 5%). A parametric study was conducted to investigate the effects of geogrid reinforcement, backfill soil, and abutment geometry on reinforcement tensile forces at the service load condition and failure condition. Results indicate that reinforcement vertical spacing and backfill soil friction angle have the most significant effects on magnitudes of maximum tensile forces at the service load condition. The locus of maximum tensile forces at the failure condition was found to be Y-shaped. Geogrid reinforcement parameters have little effect on the Y-shaped locus of the maximum tensile forces when no secondary reinforcement layers are included, backfill soil shear strength parameters have moderate effects, and abutment geometry parameters have significant effects.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geotextiles and Geomembranes - Volume 46, Issue 5, October 2018, Pages 634-645
نویسندگان
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