مهندسی سازه و ساخت

مهندسی سازه و ساخت

بررسی اثر میراگر ویسکوز در کنترل لرزه‌ای و اثر آن بر دریفت و ضربه سازه‌های مسکونی مجاور در مواجهه با زلزله

نوع مقاله : علمی - پژوهشی

نویسندگان
مازن مسیر 1
علیرضا میرزا گل تبار روشن 2
جواد واثقی امیری 3
1 دانشجو دکتری، دانشکده مهندسی عمران، دانشکده صنعتی نوشیروانی بابل،‌ بابل، ایران
2 دانشیار، دانشکده مهندسی عمران، دانشگاه صنعتی نوشیروانی بابل، بابل، ایران
3 استاد، دانشکده مهندسی عمران، دانشگاه صنعتی نوشیروانی بابل، بابل، ایران
10.22065/jsce.2025.490914.3585
چکیده
در هنگام زمین‌لرزه‌های سنگین، جابه‌جایی‌های ایجاد شده در سازه از زمین به سازه‌ی بالایی پی انتقال پیدا کرده که سبب ایجاد واکنش‌هایی دینامیکی سازه‌ای متفاوت و نوسان‌های جانبی برون از فاز گردیده است. به دلیل نبود درز انقطاع میان سازه‌های مجاور، سازه‌ها نمی‌توانند به صورت آزاد نوسان کنند که سبب ایجاد پدیده‌ی ضربه می‌شود. نوسان سازه‌ها برون از فاز موجب برخورد آن‌ها شده که ممکن است آسیب‌های شدید سازه‌ای و تلفات انسانی و اقتصادی را به بار آورد. به همین علت، در این تحقیق تأثیر زلزله بر رفتار دریفت سازه‌های فولادی 4، 7 و 10 طبقه با استفاده از مدل‌سازی عددی توسط نرم‌افزار opensees بررسی شده است. سازه‌های مورد مطالعه دارای پلان یکسان با ابعاد 15×15 متر و ارتفاع طبقات 3.3 متر بوده و در شرایط خاک نرم و منطقه‌ای با خطر لرزه‌خیزی بسیار بالا قرار دارند. مدل‌ها تحت تأثیر شتاب‌های مختلف ناشی از زلزله‌های معتبر تاریخی (مانند زلزله نورث‌ریج، کوبه و چی‌چی) قرار گرفته‌اند. همچنین جهت کنترل ارتعاش و ضربه سازه های مجاور به یکدیگر از میراگر ویسکوز در تراز بام به کار گرفته شده است. داده‌های به‌دست‌آمده نشان می‌دهند که سازه‌های 4 طبقه به طور کلی دریفت بیشتری نسبت به سازه‌های 7 و 10 طبقه تجربه کرده‌اند. در زلزله‌هایی با شتاب و فرکانس بالا، سازه‌های کوتاه‌تر (4 و 7 طبقه) آسیب‌پذیری بیشتری نشان داده و دریفت بیشتری را تجربه کرده‌اند. همچنین، مجاورت سازه‌ها تأثیر قابل توجهی بر دریفت سازه‌های کوتاه‌تر دارد. به ویژه، دریفت سازه 4 طبقه در مجاورت سازه 10 طبقه به میزان قابل توجهی افزایش یافته است. همچنین در این تحقیق، به بررسی تأثیر میراگرها بر روی دریفت سازه‌های 4 و 10 طبقه و 7 و 10 طبقه پرداخته شده است. نتایج نشان می‌دهند که استفاده از میراگرها به طور قابل توجهی دریفت سازه‌ها را کاهش داده و پایداری آن‌ها را در برابر زلزله‌ها افزایش می‌دهد.
کلیدواژه‌ها
میراگر
دریفت سازه
سازه
زلزله
اندرکنش خاک-سازه

موضوعات

عنوان مقاله English

Developing a method to reduce impacts on adjacent buildings during earthquakes using viscous dampers

نویسندگان English

Mazan Masir 1
Alireza Mirza Goltabar Roshan 2
Javad Vaseghi Amiri 3
1 PhD candidate, Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
2 Associate Professor, Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
3 Professor, Faculty of Civil Engineering,, Babol Noshirvani University of Technology, Babol, Iran
چکیده English

During severe earthquakes, displacements generated in a structure transfer from the ground to the upper parts of the foundation, creating distinct structural dynamic responses and out-of-phase lateral oscillations. Due to the absence of separation joints between adjacent structures, they cannot oscillate freely, leading to impact phenomena. The out-of-phase oscillation of these structures causes collisions, potentially resulting in severe structural damage, human casualties, and economic losses. Therefore, this study examines the earthquake impact on the drift behavior of 4-, 7-, and 10-story steel structures using numerical modeling in the OpenSees software. The studied structures have identical floor plans (15×15 meters) with a floor height of 3.3 meters, are located on soft soil, and lie within high seismic risk zones. Models were subjected to various acceleration levels from notable historical earthquakes, including the Northridge, Kobe, and Chi-Chi earthquakes. The data obtained show that 4-story structures generally experience more drift than 7- and 10-story structures. In high-acceleration, high-frequency earthquakes, shorter structures (4 and 7 stories) show greater vulnerability and experience more drift. Additionally, the proximity of structures significantly affects the drift of shorter buildings. Notably, the drift of the 4-story structure significantly increases when adjacent to a 10-story structure. This study also investigates the effect of dampers on the drift of 4- and 10-story structures and 7- and 10-story structures. Results indicate that the use of dampers significantly reduces structural drift and enhances stability against earthquakes.

کلیدواژه‌ها English

Damper
Structural drift
Structure
Earthquake
Soil-structure interaction
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  • تاریخ دریافت 01 دی 1403
  • تاریخ بازنگری 18 بهمن 1403
  • تاریخ پذیرش 20 اسفند 1403