کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
268933 504451 2017 17 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
Dynamic characteristics of a curved cable-stayed bridge identified from strong motion records
ترجمه فارسی عنوان
ویژگی های دینامیکی یک پل کابلی خمیده شناخته شده از سوابق حرکت قدرتمندی
کلمات کلیدی
پل کابلی منحنی ؛ آماده سازی پل؛ پاسخ لرزه؛ MIMO شناسایی سیستم؛ پل کاتسوشیکا-هارپ
Curved cable-stayed bridge; Instrumented bridge; Seismic response; MIMO system identification; Katsushika–Harp bridge
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی

An assessment of dynamic characteristics of the 455 m Katsushika–Harp curved cable-stayed bridge is presented. Dynamics characteristics such as natural frequencies, mode shapes and modal damping ratios are obtained from seismic response of the bridge by employing a time-domain multi-input multi-output (MIMO) system identification (SI) technique. The technique makes use of base motions and superstructure accelerations as pairs of inputs–outputs to realize the coefficients of state-space system matrices. The SI results indicate the occurrence of many closely spaced modal frequencies with spatially complicated mode shapes. Fourteen global modes in the ranges of 0.45–2.5 Hz were identified, in which the girder motion dominated most of the modes. The tower modes were associated with girder modes and were characterized by the lowly-damped motion. Using identification results from six earthquakes, the effects of earthquake amplitude on modal damping ratios were observed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 29, Issue 8, August 2007, Pages 2001–2017
نویسندگان
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