کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4919996 | 1429079 | 2017 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Prediction of long-term extreme load effects due to wind for cable-supported bridges using time-domain simulations
ترجمه فارسی عنوان
پیش بینی اثرات بار افراطی طولانی مدت به دلیل باد برای پل های پشتیبانی شده با استفاده از شبیه سازی دامنه زمانی
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کلمات کلیدی
نیروهای باد خوش اخلاق، دامنه زمان، روش حالت فضایی، تجزیه و تحلیل ارزش اضافی درازمدت،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی
Many long-span bridges that are slender and susceptible to wind-induced vibrations are currently under construction all over the world. As nonlinear structural behavior and nonlinear displacement-dependent wind loads become of higher importance, time-domain methods are commonly applied instead of frequency-domain approaches. This paper discusses how rational functions, fitted to aerodynamic derivatives, can be converted to a state-space model to transform the frequency-dependent aerodynamic forces into the time domain. A user element has been implemented in ABAQUS to include the self-excited forces in the dynamic analysis. The flutter stability limit and buffeting response of the Hardanger Bridge have been calculated in a comprehensive case study to illustrate the performance of the presented methodology. The Average Conditional Exceedance Rate method is used to estimate long-term extreme load effects. A simplified full long-term method that ignores wind velocities which contribute little to the long-term extreme values is introduced to reduce the required computational effort. The long-term predictions are also compared with results obtained using a short-term approach and it is concluded that the long-term extreme load effects are approximately 14% higher than the short-term extreme values.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 148, 1 October 2017, Pages 239-253
Journal: Engineering Structures - Volume 148, 1 October 2017, Pages 239-253
نویسندگان
Yuwang Xu, Ole Ãiseth, Arvid Naess, Torgeir Moan,