مطالعه روند تغییرات پاسخ لرزه ای اسکلت های ترکیبی قاب محیطی خمشی بلندمرتبه در ساختگاه های نزدیک گسل

نوع مقاله : Articles

نویسندگان

1 مهندسی عمران گرایش سازه، دانشگاه خوارزمی، تهران

2 دانشکده فنی و مهندسی، دانشگاه خوارزمی، تهران

3 دانشکده فنی و مهندسی، دانشگاه خوارزمی، تهران، ایران

چکیده

این پژوهش به بررسی روند تغییرات پاسخ لرزه ای اسکلت های ترکیبی قاب خمشی محیطی و مقایسه آن با سیستم پایه، بر اساس نتایج تحلیل های غیرخطی تحت مجموعه ای از رکوردهای نیرومند سه‌ مؤلفه ای حوزه نزدیک می پردازد. ساختارهای ترکیبی با تعبیه پیکربندی های چند طبقه ای المان های زیپر بزرگ‌مقیاس در اسکلت قاب محیطی خمشی حاصل می گردند. المان‌های زیپر بزرگ‌مقیاس، تنها در پانل های صلب سازه قاب محیطی تعبیه شده و دارای اتصال پیوسته با پانل زون‌های اسکلت مقاوم می‌باشند. پروسه مطالعاتی حاضر شامل بررسی چگونگی تغییرات پارامترهای پاسخ سه اسکلت مقاوم 30 طبقه با و بدون پیکربندی المان‌های زیپر بزرگ‌مقیاس است. طراحی سازه های مطالعاتی بر اساس ضوابط مقررات ملی ساختمان و همچنین ویرایش چهارم آیین نامه طراحی ساختمان ها در برابر زلزله (استاندارد 2800) انجام شده است. مدل سازی رفتار غیرخطی اعضا و تعریف مفاصل پلاستیک بر اساس ضوابط FEMA356 بوده و مجموعه تحلیل های غیرخطی تاریخچه زمانی با استفاده از نرم‌افزار SAP 2000 صورت گرفته است. کاربرد المان های زیپر بزرگ‌مقیاس در سیستم قاب محیطی خمشی، سبب پخش به نسبت یکنواخت تر نیروی محوری، برش، لنگر خمشی و پیچشی دینامیکی در ستون های محیطی پلان و کاهش دامنه دوران غیرخطی اتصالات می شود. همچنین، ارزیابی پارامترهای پاسخ دینامیکی این سازه ها نشان-دهنده‌ی بهره وری بالاتر سیستم سازه ترکیبی فوق بوده و کاهش نسبی پارامترهای پاسخ لرزه‌ای را در پی دارد.

کلیدواژه‌ها


  1. Ali, M.M. and Moon, K.S. (2007) Structural developments in tall buildings: current trends and future prospects. Architectural Science Review, 50(3), 205-223.
  2. Movahed, H., Meshkat-Dini, A. and Tehranizadeh, M. (2014) Seismic evaluation of steel special moment resisting frames affected by pulse type ground motions. Asian Journal of Civil Engineering (BHRC), 15, 575-585.
  3. Gupta, A. and Krawinkler, H. (2000) Behavior of ductile SMRFs at various seismic hazard levels. Journal of Structural Engineering (ASCE), 126(1), 98-107.
  4. Krawinkler, H. (2006) Importance of good nonlinear analysis. The Structural Design of Tall and Special Buildings, 15, 515-531.
  5. Tajmir-Riahi, H., Amouzgar, H., and Saheb-Fosoul, S. (2015) Comparative study of seismic structural response to real and spectrum matched ground motions. Scientia Iranica, Sharif University of Technology, 22(1), 92-106.
  6. Stafford Smith, B. and Coull, A. (1991) Tall Building Structures: Analysis and Design. John Wiley Publication.
  7. Gunel, M.H. and Ilgin, H.E. (2007) A proposal for the classification of structural systems of tall buildings. Journal of Building and Environment, 42, 2667-2675.
  8. Lue, Q.Z., Tang, J., Li, Q.S. (2003) Shear lag analysis in beam columns. Engineering Structure, 25, 1131-1138.
  9. Krawinkler, H., Medina, R., and Alavi, B. (2003) Seismic drift and ductility demands and their dependence on ground motions. Engineering Structure, 25, 637-653.
  10. Zareian, F. and Krawinkler, H. (2007) Assessment of probability of collapse and design for collapse safety. Earthquake Engineering and Structural Dynamics, 36, 1901-1914.
  11. Iranian National Building Code (2014) Design Loads for Buildings - Division 6. Tehran, Iran (in Persian).
  12. Iranian National Building Code (2014) Steel Structures - Division 10. Tehran, Iran (in Persian).
  13. Iranian Standard No. 2800 (2014) Iranian Code of Practice for Seismic Resistant Design of Buildings. Fourth edition. Tehran, Iran (in Persian).
  14. FEMA 356 (1998) Prestandard and Commentary for the Seismic Rehabilitation of Buildings. Federal Energy Management Agency (FEMA).
  15. SAP 2000, Integrated Software for Structural Analysis and Design. Computers & Structures, Inc., Berkeley, California.
  16. Iwan, W.D. (1994) Near-field consideration in specification of seismic design motions for structures. 10th European Conference on Earthquake Engineering, Vienna, Austria.
  17. Hall, J.F., Heaton, T.H., Halling, M.W. and Wald D.J. (1995) Near-source ground motion and its effects on flexible buildings. Earthquake Spectra, 11, 569-605.
  18. Krishnan, S. (2007) Case studies of damage to 19-story irregular steel moment-frame building under near-source ground motion. Earthquake Engineering and Structural Dynamics, 36, 861-885.
  19. Alavi, B. and Krawinkler, H. (2004) Behavior of moment-resisting frame structures subjected to near-fault ground motion. Earthquake Engineering and Structural Dynamics, 33, 687-706.
  20. Ambraseys, N.N. and Douglas, J. (2003) Near-field horizontal and vertical earthquake ground motions. Soil Dynamics and Earthquake Engineering, 23, 1-18.
  21. Somerville, P.G., Smith, N., Graves, R. and Abrahamson, N. (1997) Modification of empirical strong ground motion attenuation relation to include the amplitude and duration effects of rupture directivity. Seismological Research Letters, 68, 180-203.
  22. Somerville, P.G. (1998) Development of an improved ground motion representation for near-fault ground motions. Proceeding of SMIP98 Seminar on Utilization of Strong-Motion Data, Oakland, California.
  23. Somerville P.G., Smith N., Graves, R. (1999) Recommended lateral force requirements and commentary, 7th Edition, SEAOC, Sacramento, California.
  24. Kermani, E., Jafarian, Y. and Baziar, M. (2009) New predictive models for the ratio of strong ground motions using genetic programming. International Journal of Civil Engineering, 7, 236-247.
  25. Mavroeidis, G.P. and Papageorgiou, A.S. (2002) Near-source strong ground motions characteristics and design issues. US National Conference on Earthquake Engineering Boston, Massachusetts.
  26. Meshkat-Dini, A. (2008) Torsional Response of Tall Buildings Subjected to Near Field Earthquake Records and Application of Neutral Networks. Ph.D. Dissertation, Amirkabir University of Technology, Tehran (in Persian).
  27. Iwan, W.D. (1995) Nearfield consideration in specification of seismic design motions for structures. European Conference on Earthquake Engineering, Balkema, Rotterdam.
  28. Kalkan, E., Eeri, S.M., Kunnath, S.K. and Eeri, M. (2006) Effects of fling step and forward directivity on seismic response of buildings. Earthquake Spectra, 22(2), 367-390.
  29. Azhdarifar, M., Meshkat-Dini, A., Sarvghad-Moghadam, A. (2015) Study on the seismic response of steel medium-height buildings with framed-tube skeleton under near-fault records. Electronic Journal of Structural Engineering (EJSE), 15, 70-87.
  30. Mukhopadhyay, S. and Gupta, V.K. (2013) Directivity pulses in near-fault ground motions - I: Identification, extraction and modeling. Soil Dynamics and Earthquake Engineering, 50, 1-15.
  31. Mukhopadhyay, S. and Gupta, V.K. (2013) Directivity pulses in near-fault ground motions - II: Estimation of pulse parameter. Soil Dynamics and Earthquake Engineering, 50, 38-52.
  32. Somerville, P.G. (2003) Magnitude scaling of the near fault rupture directivity pulse. Physics of the Earth and Planetary, 137, 201-212.
  33. Haj Najafi, L. and Tehranizade, M. (2015) Selecting appropriate intensity measure in view of efficiency. Civil Engineering Infrastructures Journal, 48(2), 251-269.
  34. Lignos, D.G, Krawinkler, H. (2011) Deterioration modeling of steel components in support of collapse prediction of steel moment frames under earthquake loading. Journal of Structural Engineering, 137, 1291-1302.
  35. Ibarra, L.F., Medina, R.A., Krawinkler, H. (2005) Hysteretic models the incorporate strength and stiffness deterioration. Earthquake Engineering and Structural Dynamics, 34, 1489-1511.
  36. Bradley, B.A., Pettinga, D., Baker, J.W., Fraser, J. (2017) Guidance on the utilization of earthquake-induced ground motion simulations in engineering practice. Earthquake Spectra (EERI), 33(3), https://doi.org/10.1193/120216EQS219EP.
  37. Puglia, R., Russo, E., Luzi, L., D’Amico, M., Felicetta, C., Pacor, F., Lanzano, G., (2018) Strong-motion processing service: a tool to access and analyze earthquakes strong-motion waveforms. Bulletin of Earthquake Engineering (Springer), 16(7), 2641-2651, https://doi.org/10.1007/s10518-017-0299-z.