کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
304872 512834 2009 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Localised coherent response of the La Molina basin (Lima, Peru) to earthquakes, and future approaches suggested by Parkway basin (New Zealand) experience
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Localised coherent response of the La Molina basin (Lima, Peru) to earthquakes, and future approaches suggested by Parkway basin (New Zealand) experience
چکیده انگلیسی

Earthquake records from a 1984 temporary seismograph array set up in La Molina, Lima, Peru, are re-analysed. The array comprised eight three-component geophones; seven soil based and one rock based. Values of horizontal-to-vertical spectral ratio (HVSR) for two small earthquakes peaked at around 1.3 Hz. In one distant earthquake, four of the seven soil-based stations showed a peak at 1.25 Hz in soil-to-rock spectral ratio (SSR), the same dominant frequency observed during an aftershock of a damaging earthquake. Because this frequency is not compatible with the shear wave velocity profile attributed to La Molina, and because the spectral peak is confined to a small ground area, it is concluded that the peak is caused by a localised deposit of soft soil. Because the area associated with the spectral peak includes the area of great damage in 1974, it is concluded that coherent monochromatic behaviour is responsible for the damage.Similarities between the Parkway (New Zealand) and La Molina basins suggest approaches that may be used to increase understanding of the local soil response at La Molina.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Dynamics and Earthquake Engineering - Volume 29, Issue 10, October 2009, Pages 1347–1357
نویسندگان
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