کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4965888 1448471 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Image based modeling and prediction of nonstationary ground motions
ترجمه فارسی عنوان
مدل سازی تصویر و پیش بینی حرکات زمین ناسازگار
کلمات کلیدی
ماشین بردار مربوطه، تجزیه و تحلیل مولفه اصلی، تبدیل موجک، حرکت زمین مصنوعی، مشکل خاصی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی
Nonlinear dynamic analysis is a required step in seismic performance evaluation of many structures. Performing such an analysis requires input ground motions, which are often obtained through simulations, due to the lack of sufficient records representing a given scenario. As seismic ground motions are characterized by time-varying amplitude and frequency content, and the response of nonlinear structures is sensitive to the temporal variations in the seismic energy input, ground motion nonstationarities should be taken into account in simulations. This paper describes a nonparametric approach for modeling and prediction of nonstationary ground motions. Using the Relevance Vector Machine, a nonparametric regression model which takes as input a set of seismic predictors, and produces as output a wavelet image showing the expected time-frequency distribution of energy, conditioned on the predictors, is developed. Demonstrative examples comparing the recorded and predicted ground motions in time, frequency, and time-frequency domains are presented.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Structures - Volume 174, 1 October 2016, Pages 85-91
نویسندگان
, ,