کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
304092 512777 2014 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reliability-based load and resistance factor design approach for external seismic stability of reinforced soil walls
ترجمه فارسی عنوان
رویکرد طراحی اعتبار مبتنی بر بار و مقاومت در برابر ثبات لرزه نگاری خارجی دیوارهای تقویت شده خاک
کلمات کلیدی
عوامل بار، طراحی فاکتور مقاومت، محدود کردن حالت ها، تحلیل قابلیت اطمینان، عوامل مقاومت، دیوار خاک تقویت شده
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی


• The load and resistance factors for the seismic design of reinforced soil walls are proposed.
• A reliability based optimization methodology is used to obtain the load and resistance factors.
• The seismic reliability analysis is addressed in the framework of pseudo-static method following FHWA guidelines.
• ASD method gives a conservative design, while the LRFD method is rational.

Load and resistance factor design (LRFD) approach for the design of reinforced soil walls is presented to produce designs with consistent and uniform levels of risk for the whole range of design applications. The evaluation of load and resistance factors for the reinforced soil walls based on reliability theory is presented. A first order reliability method (FORM) is used to determine appropriate ranges for the values of the load and resistance factors. Using pseudo-static limit equilibrium method, analysis is conducted to evaluate the external stability of reinforced soil walls subjected to earthquake loading. The potential failure mechanisms considered in the analysis are sliding failure, eccentricity failure of resultant force (or overturning failure) and bearing capacity failure. The proposed procedure includes the variability associated with reinforced backfill, retained backfill, foundation soil, horizontal seismic acceleration and surcharge load acting on the wall. Partial factors needed to maintain the stability against three modes of failure by targeting component reliability index of 3.0 are obtained for various values of coefficients of variation (COV) of friction angle of backfill and foundation soil, distributed dead load surcharge, cohesion of the foundation soil and horizontal seismic acceleration. A comparative study between LRFD and allowable stress design (ASD) is also presented with a design example.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Dynamics and Earthquake Engineering - Volume 60, May 2014, Pages 8–21
نویسندگان
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