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مروری بر روش های مدلسازی برخورد ساختمان های مجاور با یکدیگر و راهکارهای کاهش پاسخ ناشی از ضربه در آنها | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 10، دوره 50، شماره 6، بهمن و اسفند 1397، صفحه 1113-1126 اصل مقاله (1.1 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2017.12733.5260 | ||
| نویسندگان | ||
| محمد پاپی؛ حمید توپچی نژاد* | ||
| گروه مهندسی عمران، دانشگاه رازی کرمانشاه، کرمانشاه، ایران | ||
| چکیده | ||
| به هنگام زلزله در ساختمانهایی که فاقد درز انقطاع مناسب با ساختمان مجاور خود میباشند پدیده ضربه زدن ساختمانها به یکدیگر میتواند سبب خسارات سازهای قابل توجهی در آنها گردد. بعد از وقوع زلزلههای مهمی همچون مکزیکوسیتی (1985) و لوماپریتا (1989 ) و مشاهدهی خسارات بوجود آمده در ساختمانها در اثر برخورد آنها با یکدیگر، این پدیده مورد توجه محققین قرار گرفت. در مقاله حاضر با مرور روشهای تحلیلی مختلفی که برای مدلسازی پدیده ضربه وجود دارند، از بین مدلهای الاستیک خطی، ویسکوالاستیک خطی، ویسکوالاستیک خطی اصلاح شده، الاستیک غیرخطی هرتز، هرتز– دمپ غیرخطی و ویسکوالاستیک غیرخطی، مدل ویسکوالاستیک غیرخطی به عنوان مدلی مناسب برای این منظور شناسایی شده است. در ادامه مقاله راهکارهای مختلف برای کاهش آثار ضربه در ساختمانهای برخورد کننده با یکدیگر، مورد بررسی قرار گرفته است. بر اساس تحلیلهای انجام شده در این تحقیق، در مواردی که درز انقطاع لازم بین ساختمانها اجرا نشده باشد یکی از مناسبترین روشها جهت کاهش آثار ضربه در ساختمانهای مجاور، تقویت ساختمانها میباشد. این امر میتواند با استفاده از افزایش سختی موثر جانبی ساختمانها و یا استفاده از ابزارهای مستهلک کننده انرژی به منظور افزایش میرایی موثر سازه و استهلاک بیشتر پاسخ دینامیکی ناشی از ضربه محقق گردد. | ||
| کلیدواژهها | ||
| پدیده برخورد؛ ارتعاش غیرهمفاز؛ نیروی ضربه؛ کاهش پاسخ لرزه ای؛ درز انقطاع | ||
| موضوعات | ||
| دینامیک سازه؛ مهندسی زلزله | ||
| عنوان مقاله [English] | ||
| A Literature Review on Modeling and Mitigating the Pounding Effects in Buildings | ||
| نویسندگان [English] | ||
| M. Papi؛ H. Toopchi-Nezhad | ||
| Department of Civil Engineering, Razi University, Kermanshah, Iran | ||
| چکیده [English] | ||
| During an earthquake event, the adjacent buildings that lack a sufficient gap from one another may experience a severe structural damage as a result of structural pounding. The effects of structural pounding specially gained more attention after the historic earthquakes of Mexico City (1985) and Loma Prieta (1989) where, a significant number of buildings were damaged due to pounding. In this paper, the analytical models that are reported in the literature to simulate the pounding forces were reviewed. These include linear elastic, linear viscoelastic, modified linear viscoelastic, Hertz non-linear elastic, Hertz-damp non-linear viscoelastic, and non-linear viscoelastic models. The accuracy of these methods has been examined and compared in this paper. Additionally, current strategies for mitigating the pounding effects in adjacent building structures are reviewed. The last component of this paper includes a case study wherein the pounding effects are mitigated via improving the effective lateral stiffness and/or effective damping ratio in the building structure of interest. Results of the case study indicate that the application of supplemental energy dissipation devices is effective in the mitigation of pounding effects in those buildings that lack any seismic gap with their neighboring structures. | ||
| کلیدواژهها [English] | ||
| Pounding phenomenon, Out-of-phase vibration, Pounding force, Seismic response mitigation, Seismic gap | ||
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سایر فایل های مرتبط با مقاله
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| مراجع | ||
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