ممانعت از ضربه بین ساختمان‌های مجاور تحت اثر زلزله‌های نزدیک به و دور از گسل

نوع مقاله : علمی - پژوهشی

نویسندگان

1 استادیار، گروه مهندسی عمران، دانشکدۀ فنی و مهندسی، دانشگاه بناب، بناب، ایران

2 استادیار گروه مهندسی عمران، دانشکده مهندسی، دانشگاه بناب، بناب، ایران

3 کارشناسی ارشد مهندسی سازه، گروه مهندسی عمران، دانشکدۀ فنی و مهندسی، دانشگاه بناب، بناب، ایران

چکیده

تحت بار لرزه‌ای، در صورت عدم وجود فاصله‌ی کافی بین دو ساختمان مجاور، ضربه‌ی میان ساختمان‌ها می‌تواند عامل وقوع خسارت‌های فراوانی باشد؛ رعایت حداقل فاصله‌ی جانبی یکی از راه‌های پیشگیری از این پدیده می‌باشد. الزامات مختلفی برای رعایت حداقل فاصله‌ی جانبی لازم در آیین‌نامه‌های متفاوت پیشنهاد شده‌است. تفاوت‌ها‌ی‌ موجود میان این الزامات، نشانگر ضرورت مطالعه و بررسی مبانی و ارزیابی کفایت روابط ارائه شده در مراجع مختلف می‌باشند. با توجه به توضیحات فوق در این مقاله، روابط پیشنهادی در استاندارد 2800 ایران (ویرایش چهارم)، آیین‌نامه‌ی بین‌المللی IBC-2009، آیین‌نامه‌ی ساختمانی اروپا EC8 ، و آیین‌نامه‌ی ساختمانی کانادا NBCC-2005 برای جلوگیری از ضربه‌ی ساختمان‌های مجاور بررسی و کفایت آنها با مقادیر تحلیلی درز انقطاع ارزیابی شد. مدل‌های اجزای محدود برای 25 ساختمان مختلف 1 تا 13 طبقه‌ی فولادی و بتن مسلح با سیستم‌های مختلف ایجاد و تحریک‌های زلزله به صورت دو مجموعه‌ی 7 شتاب‌نگاشتی نزدیک به و دور از گسل مقیاس شده جهت انطباق با طیف طرح اعمال گردیدند. طبق نتایج حاصل، عدم تفکیک ساختمان‌های تیپ از ساختمان‌های غیرتیپ در استاندارد 2800 ایران و همچنین اعمال معیار SRSS برای هر دو حالت یا اعمال ضریب 7/0 بر جابجایی غیر‌خطی هر ساختمان غیر تیپ نیازمند اصلاح بود. همچنین، محاسبه‌ی درز انقطاع برای زلزله‌های دور از گسل و نزدیک به گسل باید متفاوت باشد. در سیستم قاب خمشی متوسط، معیار SRSS برای زلزله‌های دور از گسل و معیار جمع مستقیم جابجایی‌های غیر خطی برای زلزله‌های نزدیک به گسل مناسب‌ بوده و معیار یک صدم ارتفاع در سیستم مهاربندی پیشنهاد گردید.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Code-based study of pounding prevention between adjacent buildings

نویسندگان [English]

  • Peyman Narjabadifam 1
  • Somayeh Mollaei 2
  • Mehdi Babaei 1
  • Nader Shahmahammadi 3
1 Assistant Professor, Department of Civil Engineering, University of Bonab, Bonab, East Azerbaijan Iran
2 Assistant professor, Department of Civil Engineering, University of Bonab, Bonab, Iran
3 Ms. of Structural Engineering, Department of Civil Engineering, University of Bonab, Bonab, East Azerbaijan Iran
چکیده [English]

Earthquake induced pounding between adjacent buildings could be the source of different architectural and structural damages. A minimum distance is required in references, including seismic design codes. These differences motivate an investigation to evaluate the accuracy of each criterion. In this research, the criteria mandated by modern seismic design codes are evaluated based on the separation distances predicted by nonlinear time history analyses. The study is carried out on steel and concrete buildings with different story numbers and lateral systems. A set of 7 far and 7 near – fault records compatible with the design spectrum provided in the seismic design code of Iran (Standard No. 2800 – 4th ed.) were used in the analyses. The separation distances are obtained based on SRSS and ABS compared to the criteria mandated by IBC-2009, Euro Code 8, Standard No. 2800, and NBCC 2005. Based on the results, since the ABS method results are larger than SRSS, the criterion in standard No.2800 should be reformed. It is also indicated that the criteria should be different for far and near – fault earthquakes. For moment frames, SRSS in far fault earthquakes and ABS in near fault earthquakes are suggested. For braced frames, however, a separation distance larger than or equal to one percent of the height is required in both the far fault and near fault earthquakes.

کلیدواژه‌ها [English]

  • separation distance
  • earthquake excitation
  • adjacent buildings
  • pounding
  • building codes

مراجع

  • Ambraseys, N. (1973). The Earthquake of Managua-Nicaragua 1972. Nature, 244, 427–428.
  • Anagnostopoulos, S.A. (1996). Buildings pounding re-examined: how serious a problem is it? In: 11th World Conference on Earthquake Engineering. Pergamon: Elsevier Science Oxford.
  • Anagnostopoulos, S.A. (1988). Pounding of buildings in series during earthquakes. Earthquake Engineering and Structural Dynamics, 16(3), 443-456.
  • Anagnostopoulos, S.A. & Spiliopoulos, K.V. (1992). An investigation of earthquake induced pounding. Earthquake Engineering and Structural Dynamics, 21(4), 289-302.
  • Rajaram, C.H. & Ramancharla, P.K. (2012). Comparison of codal provisions on pounding between adjacent buildings. International Journal of Earth Sciences and Engineering, 2012, 72-82.
  • Cole, G.L. Dhakal, R.P. Carr, A.J. & Bull, D.K. (2010). Building pounding state of the art Identifying structures vulnerable to pounding damage. In: 2010-NZSEE Conference. Wellington, New Zealand.
  • Hao, H. & Shen, J. (2001). Estimation of relative displacement of two adjacent asymmetric structures. Earthquake Engineering and Structural Dynamics, 30, 81-96.
  • Garcia, D.L. (2003). Probabilistic evaluation of the separation distance between adjacent systems. Student Research Accomplishments, 2002, 63-68.
  • Garcia, D.L. (2004). Separation between adjacent nonlinear structures for prevention of seismic pounding. In: 13th World Conference on Earthquake Engineering. Vancouver B.C, Canada
  • Garcia, D.L. (2004). Separation distance necessary to prevent seismic pounding between adjacent structures. New York: State University of New York at Buffalo.
  • Garcia, D.L. & Soong, T. (2009). Assessment of the separation necessary to prevent seismic pounding between linear structural systems. Probabilistic Engineering Mechanics, 24(2), 210-223.
  • Garcia, D.L. & Soong, T. (2009). Evolution of current criteria in predicting the necessary to prevent seismic pounding between nonlinear hysteretic structural systems. Engineering Structures, 31(5), 1217-1229.
  • Shrestha, B. (2013). Effects of separation distance and nonlinearity on pounding response of adjacent structures. International Journal of Civil and Structural Engineering, 3(3), 603.
  • Efraimiadou, S. Hatzigeorgiou, D. & Beskos, D.E. (2013). Structural pounding between adjacent buildings subjected to strong ground motions. Part I: The effect of different structures arrangement. Earthquake Engineering Structural Dynamics, 42(10), 1509–1528.
  • Shirole, A.B. (2015). Seismic pounding between adjacent building structures. International Journal of Innovative Research in Advanced Engineering (IJIRAE), 2(2), 37.
  • Raheem, S.E.A. Fooly, M.Y. Shafy, A.G. Abbas, Y.A. Omar, M. Latif, M. & Mahmoud, S. (2018). Seismic pounding effects on adjacent buildings in series with different alignment configurations. Steel and Composite Structures, 28(3), 289-308.
  • Abdel Raheem, S.E. Fooly, M.Y. Abdel Shafy, A.G. Taha, A.M. Abbas, Y.A. & Abdel-Latif, M. (2019). Numerical simulation of potential seismic pounding among adjacent buildings in series. Bulletin of Earthquake Engineering, 17(1), 439-471.
  • Qiao-yun, W.U. Tao, W. Min, W. & Hong-ping, Z.H.U. (2019). Study on the critical separation distance of adjacent structures based on seismic pounding fragility. Engineering Mechanics, 36(7), 89-98.
  • Khatami, S.M. Naderpour, H. Barros, R.C. & Jankowski, R. (2019). Verification of formulas for periods of adjacent buildings used to assess minimum separation gap preventing structural pounding during earthquakes. Advances in Civil Engineering, 2019.
  • Khatami, S.M. Naderpour, H. Mortezaei, A. Nazem Razavi, S.M. Lasowicz, N. & Jankowski, R. (2021). Effective gap size index for determination of optimum separation distance preventing pounding between buildings during earthquakes. Applied Sciences, 11(5), 2322.
  • Lin, J.H. (2021). Evaluation of critical separation distance to avoid seismic pounding between buildings: A spectral approach. Earthquake Engineering & Structural Dynamics, 50(11), 2863-2882.
  • Seyyed Kazemi, A. Ghaninia Tabarestani, M. & Esfandyarifard, A. (2011). Investigation of the effect of pounding on torsion and forces created in connections between adjacent buildings during an earthquake. In: 6th Iranian National Congress of Civil Engineering. Semnan, Iran. (In Persian)
  • Nik-khoo, A. & Faramarzi, M. (2012). Investigation of minimum separation distance in medium steel bending frame structures by nonlinear time history analysis. Pajuheshnameh of Seismology & Earthquake Engineering, 15(3), 47-55. (In Persian)
  • Moghabeli, R. (2013). Investigating the effects of adjacent RC buildings colliding during an earthquake on their seismic performance. Ms thesis, University of Science and Culture. (In Persian)
  • Gerami, M. Vahdani, R. Mollaeian, M. & Khatami, M. (2021). Evaluation of Park-Ang Damage Indicator in collisions of two adjacent frames under the near-fault field disturbances. Journal of Structural and Construction Engineering, 7(4), 184-198. (In Persian)
  • Ahmadi Taleshian, H. Mirza Goltabar Roshan, A. &Vaseghi Amiri, J. (2021). The rule of viscous damper for behavior improvement and pounding mitigation under random seismic input. Journal of Structural and Construction Engineering, 8(7). (In Persian)
  • Amini-Moghaddam, S. & Khodakarami, M. (2021). The adequacy of the separation gap between the adjacent structural frames considering the effects of structure-soil-structure- interaction and using particle swarm optimization algorithm. Journal of Structural and Construction Engineering, 8(3), 154-168. (In Persian)
  • Vaseghi Amiri, J. & naseri, S. (2019). The Effect of strong motion duration on pounding of steel moment frame building. Journal of Structural and Construction Engineering, 6(2), 39-56. (In Persian)
  • Building and Housing Research Center (BHRC). (2015). Iranian Code of Practice for Seismic Resistant Design of Buildings: Standard No. 2800-05, 4th Ed, Iran.
  • International Code Council (ICC). (2009). International Building Code (IBC-2009).
  • ASCE 7-10. (2005). Minimum design loads for buildings and other structures. American Society of Civil Engineers (ASCE).
  • The Euro code 8 Regulation. (1998). Design of structures for earthquake resistance – part 1: general rules, seismic action and rules for buildings.
  • NBCC-2005. (2005). National Building Code of Canada 2005. National Research Council of Canada, Ottawa, NRCC.

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سابقه مقاله

  • تاریخ دریافت: 21 بهمن 1400
  • تاریخ بازنگری: 26 فروردین 1401
  • تاریخ پذیرش: 03 خرداد 1401

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