کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
304464 512807 2012 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Seismic fragility curves of shallow tunnels in alluvial deposits
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Seismic fragility curves of shallow tunnels in alluvial deposits
چکیده انگلیسی

In this paper a numerical approach is proposed for the construction of fragility curves for shallow metro tunnels in alluvial deposits, when subjected to transversal seismic loading. The response of the tunnel is calculated under quasi static conditions applying the induced seismic ground deformations which are calculated through 1D equivalent linear analysis for an increasing level of seismic intensity. The results of the present numerical analyses are compared with selected closed form solutions, highlighting the limitations of the latter, while indicative full dynamic analysis are performed in order to validate the results of the quasi-static method. The proposed approach allows the evaluation of new fragility curves considering the distinctive features of the tunnel geometries and strength characteristics, the input motion and the soil properties as well as the associated uncertainties. The comparison between the new fragility curves and the existing empirical ones highlights the important role of the local soil conditions, which is not adequately taken into account in the empirical curves.


► Numerically-based fragility curves for shallow tunnels in alluvial deposits.
► Application to circular and rectangular tunnel sections.
► New fragility curves accounting for soil–tunnel interaction.
► Important role of soil in fragility analysis of tunnels.
► Limitations of analytical solutions for ground and tunnel response.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Dynamics and Earthquake Engineering - Volume 35, April 2012, Pages 1–12
نویسندگان
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