مهندسی سازه و ساخت

مهندسی سازه و ساخت

ارزیابی ضربات ساختمان‌های مجاور با نامنظمی پیچشی در رخدادهای لرزه ای

نوع مقاله : علمی - پژوهشی

نویسندگان
1 دانشجوی دکتری ، دانشکده عمران، دانشگاه صنعتی نوشیروانی بابل، بابل ، ایران
2 استاد، دانشکده عمران، دانشگاه صنعتی نوشیروانی بابل، بابل، ایران
3 دانشیار، دانشکده عمران، دانشگاه صنعتی نوشیروانی بابل، بابل، ایران
چکیده
در دو سازه مجاور هم در هنگام زمینلرزه‌های متوسط و شدید، از زمین به سازه‌ی بالا پی جابه‌جایی‌های انتقال پیدا کرده که سبب ایجاد پاسخ‌های دینامیکی متفاوت و نوسان‌های جانبی غیرهم‌فاز می‌گردد. به دلیل نبود و یا کمبود درز انقطاع میان سازه‌های مجاور، سازه‌ها نمی‌توانند به صورت آزاد نوسان کنند و در اثر آن برخوردی بین سازه ها پیش می آید که به این پدیده ضربه بین سازه ای گفته می‌شود. نوسان سازه‌هایی غیر هم‌فاز موجب برخورد آن‌ها شده که ممکن است آسیبهای سازه‌ای و تلفات انسانی و اقتصادی را تشدید کند. در این پژوهش به بررسی اثرات ضربه، پاسخ و تغییر شکل سازه‌های مجاور تحت تأثیر زلزله پرداخته شده است. سازه‌های مفروض مورد مطالعه دارای پلان یکسان با ابعاد 15×15 متر با نامنظمی پیچشی و ارتفاع طبقات 3.3 متر و در نوع خاک نرم و منطقه‌ای با خطر لرزه‌خیزی بسیار بالا قرار دارند. تحلیل غیرخطی تاریخچه زمانی سازه‌ها توسط نرم‌افزار اپنسیس انجام شده است. جهت کنترل ارتعاش و ضربه سازه ها، میراگر ویسکوز در تراز بام سازه کوتاه‌تر طراحی و مدلسازی غیرخطی شده است. بررسی ماکزیمم دریفت بین طبقات سازه تحت رکورد زلزله‌های مختلف نشان می دهد که به طور کلی، در حالت ضربه بین سازه های مجاور، دریفت سازه کوتاه‌تر در اثر برخورد با سازه بلندتر کاهش می‌یابد ولی در سازه بلندتر این مقدار افزایش خواهد یافت. همچنین در اثر برخورد سازه ها به هم مقدار برش پایه هر یک از سازه ها افزایش می یابد ولی این افزایش برش پایه در سازه های کوتاه تر بیشتر بوده و در سازه های بلندتر افزایش کمتری مشاهده شده است. با بررسی‌های انجام‌شده روی نیروی ضربه بین سازه‌ها با و بدون حضور میراگر ویسکوز، حضور میراگر ویسکوز در سازه‌های مجاور نقش کلیدی در کاهش نیروی ضربه و جلوگیری از آسیب‌های احتمالی ناشی از برخورد سازه‌ها دارد
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Assessment of Impacts Between Adjacent Buildings with Torsional Irregularity During Seismic Events

نویسندگان English

Nasrin al-nawashef 1
Javad Vaseghi Amiri 2
Alireza Mirza Goltabar Roshan 3
1 PhD Student, Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
2 Professor, Faculty of Civil Engineering, Babol Noshirvani University of technology, Babol, Iran
3 Associate Professor, Faculty of Civil Engineering, Noshirvani University of ‎Technology, Babol, Iran
چکیده English

In adjacent buildings during moderate and severe earthquakes, displacements are transferred from the ground to the structures, leading to different dynamic responses and out-of-phase lateral oscillations. Due to the absence or inadequacy of separation gaps between adjacent buildings, the structures cannot oscillate freely, resulting in a phenomenon known as pounding. Out-of-phase oscillations of adjacent structures cause collisions that may exacerbate structural damage and lead to human and economic losses. This study investigates the effects of pounding, responses, and deformations of adjacent buildings under seismic influence. The studied structures have identical plans with dimensions of 15×15 meters, torsional irregularities, floor heights of 3.3 meters, and are located on soft soil in a highly seismically active region. Nonlinear time-history analysis of the structures was conducted using the OpenSees software. To control vibrations and pounding, a viscous damper was designed and nonlinearly modeled at the roof level of the shorter structure. Analysis of the maximum inter-story drift of the structures under different earthquake records indicates that, generally, in the case of pounding between adjacent buildings, the drift of the shorter structure decreases due to collision with the taller structure, whereas this value increases in the taller structure. Additionally, the base shear of each structure increases due to the pounding, with the shorter structure experiencing a greater increase compared to the taller one. Examination of the pounding force between the structures, with and without the viscous damper, reveals that the presence of a viscous damper in adjacent buildings plays a key role in reducing the pounding force and preventing potential damage caused by structural collisions.

کلیدواژه‌ها English

Viscous Damper
Drift
Torsional Irregular
Impact
Earthquake
[1]           Polycarpou, P.C., P. Komodromos, and A.C. Polycarpou,(2013). A nonlinear impact model for simulating the use of rubber shock absorbers for mitigating the effects of structural pounding during earthquakes. Earthquake Engineering & Structural Dynamics, 2013. Engineering, 2019. 121: p. 135-150.
[2]           Elwardany, H., R. Jankowski, and A.(2021). Seleemah, Mitigating the seismic pounding of multi-story buildings in series using linear and nonlinear fluid viscous dampers. Archives of Civil and Mechanical Engineering, 2021. 21(4): p. 137..
[3]           Farahani, D., F. Behnamfar, and H. Sayyadpour.(2019). Effect of pounding on nonlinear seismic response of torsionally coupled steel structures resting on flexible soil. Engineering Structures, 2019. 195: p. 243-262.
[4]           Rahman, A.M., A.J. Carr, and P.J. Moss .(2000). Structural pounding of adjacent multi-storey structures considering soil flexibility effects. in Proceedings of the 12th World Conference on Earthquake Engineering, Auckland, New Zealand. 2000.
[5]           Dehshiri, D., Tajammolian, H., & Mirjalili, M. R. (2024). Investigation on the seismic fragility of steel eccentrically braced frames with vertical link using slotted bolt connection. Journal of Structural and Construction Engineering- doi: 10.22065/jsce.2024.422638.3253
[6]           Youssef, A., Esfahani, M. R., & zareian, M. (2024). Analytical verification of the behavior of TADAS metal dampers in a self-centered coupled shear wall system. Journal of Structural and Construction Engineering, 11(3). doi:10.22065/jsce.2023. 407319. 3171
[7]           Akrami, V., & Norouzi, M. (2023). A numerical study on the cyclic behavior of special truss moment frames with X-shaped pipe damper. Journal of Structural and Construction Engineering, 10(10), 204-221. doi: 10.22065/jsce.2023.377263.3000
[8]           Jalaeefar, A., & Kiani, M. (2021). Assessing the Efficiency of an Active Viscous Damper in Near-Field and Far-Field Earthquakes. Journal of Structural and Construction Engineering, 8(6), 280-300. doi: 10.22065/jsce.2020.197694.1927
[9]           Shariatmadar, H., & RAHIMZADEH, N. (2022). Behavioral factor of Pall and Rotational dampers under far field and near field records. Journal of Structural and Construction Engineering, 8(Special Issue 4), 212-231. doi: 10.22065/jsce.2021.281093.2420
[10]         Khanlari, K., Gharra, K., & Asgari Marnani, J. (2023). Designing Passive Control System in Friction-Damped Structures. Journal of Structural and Construction Engineering,. doi: 10.22065/jsce.2021.236501.2173
[11]         Mirtaheri, M., Farhoudi, N., & Nazeryan, M. (2018). Case study and Evaluation of two steel bracing systems in the Bam earthquake and methods of retrofitting. Journal of Structural and Construction Engineering, 5(Special Issue 3), 120-138. doi: 10.22065/jsce.2017.88069.1220
[12]         Goel, R.K. and C.A. Booker.(2001). Effects of supplemental viscous damping on inelastic seismic response of asymmetric systems. Earthquake engineering & structural dynamics, 2001. 30(3): p. 411-430
[13]         Vial, I.J., et al., .(2006). Torsional balance of plan‐asymmetric structures with frictional dampers: experimental results. Earthquake engineering & structural dynamics, 2006. 35(15): p. 1875-1898
[14]         Ok, S.-Y., J. Song, and K.-S. Park, .(2008). Optimal design of hysteretic dampers connecting adjacent structures using multi-objective genetic algorithm and stochastic linearization method. Engineering structures, 2008. 30(5): p. 1240-1249.
[15]         Mansoori, M. and A. Moghadam, .(2009). Using viscous damper distribution to reduce multiple seismic responses of asymmetric structures. Journal of Constructional Steel Research, 2009. 65(12): p. 2176-2185.
[16]         Bharti, S., S. Dumne, and M. Shrimali, .(2010). Seismic response analysis of adjacent buildings connected with MR dampers. Engineering Structures, 2010. 32(8): p. 2122-2133.
[17]         S Bigdeli, K., W. Hare, and S. Tesfamariam, .(2012). Configuration optimization of dampers for adjacent buildings under seismic excitations. Engineering Optimization, 2012. 44(12): p. 1491-1509..
[18]         Pawar, P. and P. Murnal. (2014). Effect of seismic pounding on adjacent blocks of unsymmetrical buildings considering soil-structure interaction. Int J Emerg Technol Adv Eng, 2014. 4(7): p. 391-395.
[19]         Madani, B., F. Behnamfar, and H.T. Riahi, .(2015). Dynamic response of structures subjected to pounding and structure–soil–structure interaction. Soil Dynamics and Earthquake Engineering, 2015. 78: p. 46-60.
[20]         Akköse, M. and F. Sunca, .(2016). Effects of near-fault ground motions on earthquake-induced pounding response of RC buildings with plan irregularity, in Insights and Innovations in Structural Engineering, Mechanics and Computation. 2016, CRC Press. p. 320-325.
[21]         Ghandil, M. and H. Aldaikh, .(2017). Damage‐based seismic planar pounding analysis of adjacent symmetric buildings considering inelastic structure–soil–structure interaction. Earthquake Engineering & Structural Dynamics, 2017. 46(7): p. 1141-1159.
[22]         Kontoni, D.-P.N. and A.A. Farghaly, .(2018). Seismic response of adjacent unequal buildings subjected to double pounding considering soil-structure interaction. Computation, 2018. 6(1): p. 10.
[23]         Miari, M., K.K. Choong, and R. Jankowski, .(2019). Seismic pounding between adjacent buildings: Identification of parameters, soil interaction issues and mitigation measures. Soil Dynamics and Earthquake Engineering, 2019. 121: p. 135-150.
[24]         Abdel Raheem, S.E., et al., .(2019). Numerical simulation of potential seismic pounding among adjacent buildings in series. Bulletin of Earthquake Engineering, 2019. 17: p. 439-471.
[25]         Awchat, G., et al., .(2022). Seismic pounding response of neighboring structure using various codes with soil-structure interaction effects: Focus on separation gap. Civ Eng J, 2022. 8(2): p. 308-18.
[26]         Sobhi, P. and H. Far, .(2022). Impact of structural pounding on structural behaviour of adjacent buildings considering dynamic soil-structure interaction. Bulletin of Earthquake Engineering, 2022. 20(7): p. 3515-3547.
[27]         Cayci, B.T. and M. Akpinar. .(2021). Seismic pounding effects on typical building structures considering soil-structure interaction. in Structures. 2021. Elsevier.
[28]         Ebadi-Jamkhaneh, M., .(2024). Pounding Risk Assessment through Soil–Structure Interaction Analysis in Adjacent High-Rise RC Structures. Buildings, 2024. 14(9): p. 2779.
[29]         ASCE/SEI7‐10. (2010). Minimum design loads for buildings and other structures, ASCE/SEI 7‐10. Reston, Virginia: American Society of Civil Engineers
[30]         ANSI, B. (2010). AISC 360-10-Specification for Structural Steel Buildings [J]. Chicago AISC
[31]         FEMA, P. (2000). Commentary for the seismic rehabilitation of buildings. FEMA-356, Federal Emergency Management Agency, Washington, DC
[32]         McKenna F, Fenves GL, Scott MH, Jeremic B. Open system for earthquake engineering simulation (2000). Web page. http://OpenSees.berkeley.edu.
[33]         M.D. Symans, M.C. Constantinou, .(1998). Passive fluid viscous damping systems for seismic energy dissipation, J. Earthq. Technol. ISET 35 (4) (1998) 185–206
[34]         Tubaldi E, Gioiella L, Scozzese F, Ragni L, Dall’Asta A.(2020). A Design Method for Viscous Dampers Connecting Adjacent Structures. Front Built Environ 2020;6:1–14. https://doi.org/10.3389/fbuil.2020.00025.
[35]         Hosseini P, Hosseini M, Omranizadeh S, .(2019). The Effect of Height of Structure on the Accuracy of Nonlinear Static Analysis Methods in Steel Structures with Lead Rubber Bearing (LRB) Base Isolators, Civil Infrastructure Researches, 2019, https://cer.qom.ac.ir/article_1445_6c389e2b0d8d67c972e5bfd49045e0eb.pdf.
[36]         Haji Mazdarani M, Hoseini Vaez S, Hosseini P, Fathali M, .(2023). Reliability-based layout optimization of concentrically braced in 3D steel frames. Structures . https://doi.org/10.1016/j.istruc.2022.11.130
[37]         Zamani A, Etedali S, .(2023). New formulas for optimal design of TMD using genetic programming method and their application to control of seismic-excited structures, Journal of Structural and Construction Engineering, https://www.jsce.ir/article_157613_a009af19c1cb3f2c3abc2ed34396056c.pdf.

  • تاریخ دریافت 12 اسفند 1403
  • تاریخ بازنگری 08 تیر 1404
  • تاریخ پذیرش 04 مرداد 1404