کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
305127 512857 2007 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Earthquake ground motion in Mexico City: An analysis of data recorded at Roma array
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Earthquake ground motion in Mexico City: An analysis of data recorded at Roma array
چکیده انگلیسی

We analysed in detail three earthquakes recorded in a small-aperture accelerometric array in Mexico City, using the correlation of the records as a function of time along the accelerogram and frequency. Ground response is strongly conditioned by the fundamental period of the soft soils at the site of the array (T0). Energy at periods longer than 2T0 is guided by the crustal structure (with a thickness of 45 km). The wave field at periods between T0 and 2T0 also consists of surface waves but guided by the upper 2–3 km of volcanic sediments in central Mexico. For periods smaller than T0, ground motion is uncorrelated among the stations. Our results indicate that seismic response of Mexico City, including its very long duration, results from deeply guided surface waves (between 2 and 45 km depth) interacting with the very local response of the soft surficial clay layer.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Dynamics and Earthquake Engineering - Volume 27, Issue 5, May 2007, Pages 475–486
نویسندگان
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