کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6736429 | 1429055 | 2018 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental and numerical analyses of variability in the responses of imperfect slender free rigid blocks under random dynamic excitations
ترجمه فارسی عنوان
تجزیه و تحلیل تجربی و عددی متغیر در واکنش های بلوک های سفت و محکم نازک بلند باریک تحت تحریکات پویا تصادفی
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کلمات کلیدی
بلوک سفت تکان دادن انحراف عیوب، حرکت خارج از هواپیما، آزمایشات لرزه ای، اعتبار سنجی آماری،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی
Due to the well-known sensitivity of the behaviors of free structures under seismic excitations, the question of the aptitude of a numerical model to accurately represent them arise. To contribute to the answer to this question, this article presents experiments which were carried out on the shaking table of CEA/Saclay in France, on three rigid blocks with geometrical defects, inevitably due to the manufacturing process, subjected to 100 realizations of a random process. These tests were analyzed using specifically-developed indicators, and compared with the results yielded by two numerical models, one with a symmetrical geometry and the other with a non-symmetrical geometry, calibrated to reproduce out-of-plane behavior identified through release tests. Counter-intuitively, this article shows that a numerical model can predict motion over a longer period than an experiment performed on a supposedly identical block. From a statistical point of view, despite experimental uncertainties this article shows a good agreement between numerical and experimental results. Finally, a numerical study, performed using artificial seismic signals, showed that the assumption of perfect geometry can lead to an underestimation of the risk of overturning. Moreover, it is showed that a symmetrical model with a realistic slenderness correction can provide an overestimation of this risk under 1D excitation, but not in 2D.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 172, 1 October 2018, Pages 891-906
Journal: Engineering Structures - Volume 172, 1 October 2018, Pages 891-906
نویسندگان
Charlie Mathey, Cyril Feau, David Clair, Laurent Baillet, Michel Fogli,