مطالعه ضربه دو ساختمان قاب خمشی فولادی مجاور یکدیگر در اثر زلزله‌های متوالی دور و نزدیک گسل

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی عمران، موسسه آموزش عالی جهاد دانشگاهی خوزستان، اهواز، ایران

2 دانشکده مهندسی عمران، واحد آبادان، دانشگاه آزاد اسلامی، آبادان، ایران

چکیده

آیین‌نامه‌های لرزه‌ای، پیش‌گام در ارائه ضوابط لرزه‌ای در رفتار غیرخطی سازه‌ها هستند لیکن معمولا توجه کمتری به دو پدیده اصلی می شود. اول پدیده ضربه سازه‌های مجاور است که این پدیده می‌تواند عامل رفتارهای غیرخطی شدید باشد و آیین‌نامه‌ها معمولاً برای پیشگیری از اثرات آن بر سازه‌های مجاور، یک درز انقطاع بین دو سازه پیشنهاد می‌کنند اما در صورت نیاز به بررسی اثر ضربه ساختمان‌های مجاور با درز انقطاع پیشنهاد شده یا اجرا شده، پیشنهادی ارائه نشده است و دوم، اثرات توالی لرزه‌ای است. در این مقاله جهت بررسی ضربه ساختمان‌های خمشی فولادی مجاور یکدیگر در اثر زلزله‌های متوالی دور و نزدیک گسل از شش زوج قاب فولادی با ارتفاع‌های متفاوت، با و بدون اختلاف ارتفاع در طبقه همکف استفاده شده است. این قاب‌ها با استفاده از تحلیل تاریخچه زمانی غیرخطی تحت اثر 24 رکورد زلزلة متوالی حوزة دور و نزدیک گسل در قالب سه دسته ترکیب زلزله سکانسی که با توجه به ویرایش چهارم استاندارد 2800 مقیاس شده‌اند مورد ارزیابی قرار گرفته‌اند. نتایج حاصل از تحقیق نشان داد که درز آیین‌نامه مانع از برخورد قاب‌های مجاور به یکدیگر نگردیده و نیاز به بازنگری داشته ولی به نسبت قاب‌های در تماس که در اکثر موارد ضربه قاب‌ها به یکدیگر منجر به فروریزش سازه گردیده، حالت مناسب‌تری بوده و باعث کاهش خسارات می‌گردد. نیروی ضربه رفتار قاب‌های مجاور برخورد کننده را به نسبت رفتارهای مورد انتظار قاب‌ها در حالت بدون ضربه (قاب‌های جدا از هم) تغییر داده و پاسخ‌های متفاوتی را از خود نشان می‌دهند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Study of the Impact of Pounding of Steel Moment Frames due to Sequential near- and far-fault Earthquakes

نویسندگان [English]

  • Navid Siahpolo 1
  • Seyed Abdonnabi Razavi 2
  • Javad Moslemzadeh 1
1 Department of Civil Engineering, Institute for Higher Education ACECR, Khouzestan, Iran
2 Department of Civil Engineering, Abadan Branch, Islamic Azad University, Abadan, Iran
چکیده [English]

Seismic codes, the pioneers in presenting seismic criteria in the nonlinear behavior of structures, usually address less the two main factors. The first accident hits adjacent structures, which can be a severe nonlinear cause, and regulations are usually used to execute the program on adjacent structures, a discontinuous seam between two adjacent structures, but if necessary, the effect of adjacent buildings with discontinuous joints is recommended. Or, no suggestion is made and second, the sequence is executed. In this paper, in order to investigate the impact of adjacent steel bending structures due to successive earthquakes near and near the fault, six pairs of steel frames with different heights, with and without height differences on the ground floor have been used. These frames have been evaluated using nonlinear time history analysis under the effect of 24 consecutive earthquakes in the near and far faults in the form of three sequential seismic composition scales that have been scaled according to the fourth edition of the 2800 standard. The results of the study showed that the seam of the regulation did not prevent adjacent frames from colliding with each other and needed to be reviewed, but compared to the frames in contact, which in most cases led to the collapse of the frame, it is more suitable and reduces damage. . Impact force changes the behavior of adjacent colliding frames relative to the expected behaviors of the frames without impact (separate frames) and exhibits different responses.

کلیدواژه‌ها [English]

  • Discontinuous joint
  • Gap element
  • Sequential earthquake
  • Far fault
  • Near fault

مراجع

[1] A.B. Karamadi, R. Togarsi, Analysis of seismic pounding between adjacent buildings, Int Res J Eng Technol, 4(5) (2017) 2801-2807.
[2] F.N. Kudu, Ş. Uçak, G. Osmancikli, T. Türker, A. Bayraktar, Estimation of damping ratios of steel structures by Operational Modal Analysis method, Journal of Constructional Steel Research, 112 (2015) 61-68.
[3] F. Kazemi, M. Miari, R. Jankowski, Investigating the effects of structural pounding on the seismic performance of adjacent RC and steel MRFs, Bulletin of Earthquake Engineering, 19(1) (2021) 317-343.
[4] M. Gerami, A. Kheyrodin, The Effect of the Irregularity of Lateral Stiffness on the Demand of Separation Gap Angle in Steel Moment Frames Under Near-Field Earthquakes, Modares Civil Engineering journal, 19(1) (2019) 131-140. (In Persian)
[5] J. Ruiz-García, J.C. Negrete-Manriquez, Evaluation of drift demands in existing steel frames under as-recorded far-field and near-fault mainshock–aftershock seismic sequences, Engineering Structures, 33(2) (2011) 621-634.
[6] J. Ruiz-García, Discussion on “Effects of multiple earthquakes on inelastic structural response”, Engineering structures, 58 (2014) 110-111.
[7] F. Mazza, R. Labernarda, Magnetic damped links to reduce internal seismic pounding in base-isolated buildings, Bulletin of Earthquake Engineering, 18(15) (2020) 6795-6824.
[8] S.E.A. Raheem, Mitigation measures for earthquake induced pounding effects on seismic performance of adjacent buildings, Bulletin of earthquake engineering, 12(4) (2014) 1705-1724.
[9] B. Mohebi, O. Yazdanpanah, F. Kazemi, A. Formisano, Seismic damage diagnosis in adjacent steel and RC MRFs considering pounding effects through improved wavelet-based damage-sensitive feature, Journal of Building Engineering, 33 (2021) 101847.
[10] R. Song, Y. Li, J.W. Van de Lindt, Loss estimation of steel buildings to earthquake mainshock–aftershock sequences, Structural safety, 61 (2016) 1-11.
[11] F. Kazemi, B. Mohebi, R. Jankowski, Predicting the seismic collapse capacity of adjacent SMRFs retrofitted with fluid viscous dampers in pounding condition, Mechanical Systems and Signal Processing, 161 (2021) 107939.
[12] S. No, 2800 “Iranian Code of Practice for Seismic Resistant Design of Buildings”, Third Revision, Building and Housing Research Center, Tehran,  (2005).
[13] S.A. Razavi, N. Siahpolo, M. Mahdavi Adeli, A New Empirical Correlation for Estimation of EBF Steel Frame Behavior Factor under Near-Fault Earthquakes Using the Genetic Algorithm, Journal of Engineering, 2020 (2020).
[14] G.L. Yeo, Stochastic characterization and decision bases under time-dependent aftershock risk in performance-based earthquake engineering, Stanford University, 2005.
[15] C. Amadio, M. Fragiacomo, S. Rajgelj, The effects of repeated earthquake ground motions on the non‐linear response of SDOF systems, Earthquake engineering & structural dynamics, 32(2) (2003) 291-308.
[16] G.D. Hatzigeorgiou, N.G. Pnevmatikos, On the seismic response of collided structures, Int. J. Civ. Archit. Struct. Constr. Eng, 8 (2014) 750-755.
[17] M.C. Basim, F. Pourreza, M. Mousazadeh, A.A. Hamed, The effects of modeling uncertainties on the residual drift of steel structures under mainshock-aftershock sequences, in:  Structures, Elsevier, 2022, pp. 912-926.
[18] H.a.U.D. Committe, National Building Regulations of Iran, 6th Chapter: loadings on structures, 2015 (in Persian).
[19] H.a.U.D. Committe, National Building Regulations of Iran, 10th Chapter: Specification for steel structures design, 2015 (in Persian).
[20] E.U.s. Manual, Integrated Building Design Software, Computer and Structure Inc. Berkeley, USA,  (2002).
[21] B. REF, E.E. MANUAL, SAP2000®,  (1978).
[22] M. Noman, B. Alam, M. Fahad, K. Shahzada, M. Kamal, Effects of pounding on adjacent buildings of varying heights during earthquake in Pakistan, Cogent Engineering, 3(1) (2016) 1225878.
[23] A. Agagnostopoulos, Pounding of building in series during earthquake, Earthquake Engineering and Structural Dynamics, 16(3) (1988) 443-456.
[24] H. Takabatake, M. Yasui, Y. Nakagawa, A. Kishida, Relaxation method for pounding action between adjacent buildings at expansion joint, Earthquake engineering & structural dynamics, 43(9) (2014) 1381-1400.
[25] F. Prestandard, commentary for the seismic rehabilitation of buildings (FEMA356), Washington, DC: Federal Emergency Management Agency, 7(2) (2000).
نشریه مهندسی عمران امیرکبیر
دوره 54، شماره 9
آذر 1401
صفحه 3471-3496

فایل ها

هم رسانی

ارجاع به این مقاله

آمار