بررسی عملکرد میراگر شکافدار و تیر با سطح مقطع کاهش یافته تحت بارگذاری چرخه‌ای

نوع مقاله : یادداشت فنی

نویسندگان

1 استادیار، گروه مهندسی عمران، دانشکده فنی مهندسی، واحد پرند، دانشگاه آزاد اسلامی، پرند، ایران

2 گروه مهندسی عمران، دانشکده فنی و مهندسی، واحد تهران غرب، دانشگاه آزاد اسلامی، تهران، ایران

3 کارشناس ارشد مهندسی عمران سازه، دانشگاه سمنان

چکیده

یکی از نقدهای مطرح شده به اتصالات پیشنهادی بعد از زلزله های نورثریچ و کوبه، تخریب تیر بعد از وقوع زلزله، دشواری و مقرون به صرفه نبودن تعویض آن پس از زلزله می‌باشد. به همین منظور ایده استفاده از اتصالات همراه با میراگر شکافدار (SSD) که موجب استهلاک انرژی و تشکیل مفصل پلاستیک در مکانی غیر از المان‌های اصلی سازه‌ای میگردد، مطرح شد. در این مطالعه ابتدا مقایسه‌ای بین اتصال SSD و اتصال تیر با سطح مقطع کاهش یافته (RBS) تحت بارگذاری چرخه‌ای انجام شده است. در ادامه پیشنهاداتی به منظور بهبود عملکرد اتصال SSD با قابلیت استفاده در قاب‌های خمشی ویژه مطرح گردیده است، که این پیشنهادات شامل افزایش ضخامت و تعداد نوارها و همچنین کاهش ارتفاع میراگر بوده است. نتایج مطالعات نشان داد که اتصال SSD از لحاظ عملکردی تفاوت زیادی با اتصال RBS نداشته است و مطابق با ضوابط لرزه‌ای اتصالات از پیش تایید شده، امکان استفاده از این اتصال در قاب‌های خمشی ویژه وجود دارد با این تفاوت که نیاز به تعویض آن پس از زلزله نمی باشد. همچنین نتایج نشان داد که افزایش ضخامت و کاهش ارتفاع میراگر بر خلاف افزایش تعداد نوارهای آن، بر روی عملکرد اتصال SSD تاثیر بیشتری داشته است. نتایج نشان می دهید اتصال SSD علاوه بر سهولت تعویض می تواند عملکردی مشابه اتصالات RBS را از خود بروز دهد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Evaluation of Slit Steel Damper & Reduced Beam Section Connections Under Cyclic Loading

نویسندگان [English]

  • Masoud Zabihi Samani 1
  • Mohammad Hossein Abed Ebrahimi 2
  • payam tarighi 3
1 Assistant Professor, Department of Civil Engineering, Parand Branch, Islamic Azad University, Parand, Iran
2 Department Of Civil Engineering, College of Technical and Engineering, West Tehran Branch, Islamic Azad University,Tehran, Iran.
3 M.Sc. of Structural Engineering, Faculty of Civil Eng., Semnan University
چکیده [English]

One of the drawbacks of the mentioned connections after Northridge and kobe earthquakes was the destruction of beam after earthquake, difficulty and non economical displacement of the beam. Several studies are being carried out on a variety of materials and systems that dissipate the seismic loading effects in order to improve the seismic performance of steel frames. By placing dampers in the beam column connections, damage to the beams and columns, which are very difficult to replace after an earthquake, was prevented during an earthquake. During the design process of dampers, in order to concentrate the earthquake loads on the damper, it was manufactured intentionally with a lower strength than the beams and columns. Through this, beams and columns are protected from damage by utilizing the energy absorption capacity of the damper. Slit damper is a plate or a standard section with a number of slits in the web. The damper is attached to the beam by bolting a plate on the damper under the flange of the beam. In this study first compared slit steel damper connection and connection with the reduced beam section (RBS) under cyclic loading. Some suggestions were provided for improvement of the performance of slit steel damper connection and for making its behavior similar to that of reduced beam section connection and transforming it to a connection which can be used in the special bending frame; and these suggestions include increase in the thickness and number of stripe and decrease in the height. the results and simulations showed that increasing in the number of strips, the increase in thickness and decrease in the height of the SSD damper affects significantly the performance of SSD connection.

کلیدواژه‌ها [English]

  • slit steel damper
  • reduced beam section
  • cyclic loading
  • special moment frame
  • steel structure

مراجع

[1] Wada, A., Huang, Y.H., Yamada, T., Ono, Y., Sugiyama, S., Baba, M. and Miyabara, T. (1997). Actual Size & Real Time Speed Tests for Hysteretic Steel Damper. In: Proceedings of Stessa, Vol. (97), pp. 778-785.
[2] Lee, M.-H., Oh, S.-H., Huh, C., Oh, Y.-S., Yoon, M.-H., Moon, T.-S. (2002). Ultimate Energy Absorption Capacity of Steel Plate Slit Dampers Subjected to Shear Force. Steel Structures, Vol. (2), pp. 71-79.
[3] Chan, R. and Albermani, F. (2008). Experimental Study of Steel Slit Damper for Passive Energy Dissipation. Engineering Structures, Vol. (30), pp. 1058–1066.
[4] Oh, S.-H., Kim, Y.-J. and Ryu, H.-S. (2008). Seismic Performance of Steel Structures with Slit Dampers. Engineering Structures, Vol. (31), pp. 1997-2008.
[5] Ghabraie, K., Chan, R., Huang, X. and Xie, Y.M. (2010). Shape Optimization of Metallic Yielding Devices for Passive Mitigation of Seismic Energy. Engineering Structures, Vol. (32), pp. 2258-2267.
[6] Khosnodian, F. and Kiani, M. (2010). Evaluation of SSD Connections in Special Steel Moment Frame. First National Conference on Structural-Earthquake-Geotechnics, Mazandaran, Babolsar.
[7] Karavasilis, T.L., Kerawala, S. and Hale, E. (2012). Hysteretic Model for Steel Energy Dissipation Devices & Evaluation of a Minimal-Damage Seismic Design Approach for Steel Buildings. Journal of Constructional Steel Research, Vol. (70), pp. 358–367.
[8] Tohidi Moghadam, V. and Saeed Monir, H. (2012). Evaluation of CSSD Connections under Seismic Loading. Second National Conference on Crisis Management, Tehran, Iran.
[9] Tohidi Moghadam, V. and Saeed Monir, H. (2012). Usage of CSSD in Steel Moment Frame. Third National Conference on Earthquake and Structures, Kerman, Iran.
[10] Zahraei, S. M. and Amin dehghan, A. (2012). Evaluation of New metal damper for Improving Seismic Behavier of Concentrated brace. Second National Conference on Crisis Management, Tehran, Iran.
[11] Zahraei, S. M. and Amin dehghan, A. (2012). Evaluation of Ductility and Absorb Energy of New Damper for Usage in Steel Braced Frame. Second National Conference on Crisis Management, Tehran, Iran.
[12] Koken, A. and Koroglu, M.A. (2012). Waste Rubber Damper Using on Steel Beam to Column Connection. International Journal of Arts & Sciences, Vol. (5), pp. 217–222.
[13] Moshtagh, A., Sheydaei, M.R. and Tohidi Moghadam, V. (2012). Usage of CSSD on the failure behavior of spatial double-layer Smooth and evaluation of progressive failure in them. Third National Conference on Earthquake and Structures, Kerman, Iran.
[14] Moshtagh, A., Tohidi Moghadam, V. and Saeed Monir, H. (2012). Study of progressive fracture on reinforced frames with duct slit damper. The 2nd National Conference on Earthquake-Geotechnic and Structures, Mazandaran.
[15] Saffari, H., Hedayat, A.A. and Poorsadeghi Nejad, M. (2013). Post-Northridge Connections With Slit Dampers to Enhance Strength & Ductility. Journal of Constructional Steel Research, Vol. (80), pp. 138–152.
صاحبامتیاز انجمن مهندسی سازه ایران
222 نشریه علمی – پژوهشی مهندسی سازه و ساخت، دوره 6، شماره 2، سال 9318 ، صفحه 201 تا 222
[16] Koken, A. and Koroglu. M.A. (2015). Experimental Study on Beam-to-Column Connections of Steel Frame Structures with Steel Slit Dampers. American Society of Civil Engineers, Vol. (29), pp. 1-11.
[17] Hedayat, A.A. (2015). Prediction of the Force Displacement Capacity Boundary of an Unbuckled Steel Slit Damper. Journal of Constructional Steel Research, Vol. (114), pp. 30-50.
[18] Farahi Shahri, S. and Mosavi, S.R. (2016). Development of slit dampers at the junction to the column by creating oval gaps. Modares Civil Engineering Jurnal, Vol. (16), pp. 93-104.
[19] Tagawa, H., Yamanishi, T., Takaki, A. and Chan, R. (2016). Cyclic Behavior of Seesaw Energy Dissipation System with Steel Slit Dampers. Journal of Constructional Steel Research, Vol. (117), pp. 24–34.
[20] Hwan Lee, Ch., Kim, J., Hyun Kim, D., Ryu, J., K. and Ju, Y. (2016). Numerical & Experimental Analysis of Combined Behavior of Sheartype Friction Damper & Non-uniform Strip Damper for Multi-level Seismic Protection. Engineering Structures, Vol. (114), pp. 75–92.
[21] Zabihi-Samani M and Amini F. (2015) A cuckoo search controller for seismic control of a benchmark tall building, Journal of Vibroengineering, Vol. 17(3), pp. 1382-1400.
[22] Mirghaderi, S.R., Torabian, Sh. and Imanpour, A. (2010). Seismic Performance of the Accordion-Web RBS Connection. J Constr Steel Res, Vol. (66), pp. 277-288.
[23] Aghajanian S, Baghi H, Amini and Zabihi-Samani Masoud. (2014). Optimal control of steel structures by improved particle swarm, International Journal of Steel Structure, , Vol. (14), pp. 223-30.
[25] Saleh, A., Mirghaderi, S.R. and Zahrai, S.M. (2016). Cyclic Testing of Tubular Web RBS Connections in Deep Beam. Jornal of Constructional Steel Research, Vol. (117), pp. 2214-226.
[26] Amini F, Zabihi-Samani M. (2014). A wavelet-based adaptive pole assignment method for structural control, Computre Aided Civil and Infrastructure Engineering, Vol. (29(6)), pp. 464-77.
[27] Moon, K.H., Kim, B.Ch., Hwang, S.H. and Han, S.W. (2016). Seismic Performance Evaluation of the Steel Moment Frames with Reduced Beam Section Connections with Bolted Web. The 5th International Symposium on Steel Structures, Seoul, Korea.
[28] Ghanooni-Bagha M, Shayanfar MA, Reza-Zadeh O, Zabihi-Samani M. (2017). The effect of materials on the reliability of reinforced concrete beams in normal and intense corrosions. Eksploatacja i Niezawodnosc – Maintenance and Reliability. Vol. (19(3)), pp. 393-402.
[29] Chih Chen, Ch. and Chou Lin, Ch. (2013). Seismic Performance of Steel Beam-to-Column Moment Connections with Tapered Beam Flanges. J Struct Eng, Vol. (48), pp. 588-601.
[30] Kulkani, S.A. and Vesmawala, G. (2014). Study of Steel Moment Connection with & Without Reduced Beam Section. Case Studies in Structural Engineering, Vol. (1), pp. 26-31.
[31] Zabihi-Samani Masoud and Ghanooni-Bagha Mohammad. (2017). A fuzzy logic controller for optimal structural control using MR dampers and particle swarm optimization. Journal of Vibroengineering, Vol. (19(3)), pp. 1901-1914.
[32] Saleh, A., Zahrai, S.M. and Mirghaderi, S.R. (2016) Exprimental Study on Innovative Tubular Web RBS Connections in Steel MRFs With Typical Shallow Beams. Structural Engineering & Mechanics, Vol. (57), pp. 785-808.
[33] ABAQUS (2010). Version9.10, Dassault Systemes, USA.
[34] FEMA 350 (2000). Recommended Seismic Design Criteria for New Steel Moment Frame Buildings. SAC Joint Venture.
[35] AISC 358 (2016). Prequalified Connections for Special & Intermediate Steel Moment Frams for Seismic Applications. Chicago.
[36] Code 10 (2012). Design and Construction Provisions for Structural Steel Buildings. Tehran: Toseh Iran.

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سابقه مقاله

  • تاریخ دریافت: 02 مهر 1396
  • تاریخ بازنگری: 26 آذر 1396
  • تاریخ پذیرش: 04 دی 1396

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