کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
559058 1451853 2016 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Significance of stiffening of high damping rubber bearings on the response of base-isolated buildings under near-fault earthquakes
ترجمه فارسی عنوان
اهمیت سفت شدن یاتاقانهای لاستیکی با فشار بالا در پاسخ ساختمان های بنیادی تحت زلزله نزدیک به خطا
کلمات کلیدی
جداسازی پایه، یاتاقانهای لاستیکی مجهز بالا، استحکام کششی، مدل سخت زلزله نزدیک به گسل
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
چکیده انگلیسی


• Consideration of advanced analytical model for high damping rubber bearings (HDRBs).
• Significance of stiffening of HDRBs on the response of base-isolated buildings.
• Comparison of stiffening versus non-stiffening models under near-fault earthquakes.
• Suggestions for modifications to seismic code regulations.

High Damping Rubber Bearings (HDRBs) are among various types of laterally flexible isolation system elements that effectively protect structures from detrimental effects of earthquakes by lengthening their fundamental periods. However, large isolator displacements resulting in strains larger than 100% may come into scene in case of near-fault ground motions containing long-period and large-amplitude velocity and/or displacement pulses. This is particularly important when HDRBs are used since the post-yield stiffness of an HDRB increases due to inherent strain hardening characteristics when a threshold isolator displacement limit is exceeded. Therefore, it may be critical to consider the stiffening of HDRBs in modeling of these elements for accurate seismic response evaluation of the buildings equipped with HDRBs that are located in near-fault regions. In this study, the significance of stiffening of HDRBs on the response of base-isolated buildings is investigated by conducting nonlinear time history analyses of benchmark six-story base-isolated buildings which employ HDRBs that are represented by non-stiffening or stiffening models under both historical and synthetic near-fault ground motions of various magnitudes and fault distances. The structural response parameters included in the comparisons are base displacements, story drifts, and floor accelerations. It is found that, the significance of stiffening of HDRBs on the response of base-isolated buildings under near-fault earthquakes becomes more prominent as the earthquake magnitude increases and the fault distance decreases and thus suggestions for modifications to seismic code regulations are made accordingly.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanical Systems and Signal Processing - Volume 79, 15 October 2016, Pages 297–313
نویسندگان
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