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ارزیابی آسیب پذیری لرزه ای ساختمان های بتن آرمه مقاوم سازی شده با روش ژاکت فولادی ستون ها به روش احتمالاتی | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 16، دوره 51، شماره 3، مرداد و شهریور 1398، صفحه 585-598 اصل مقاله (2.84 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2018.13692.5459 | ||
| نویسندگان | ||
| حسین پهلوان1؛ علی ناصری* 2؛ آرمین عین اللهی3 | ||
| 1استادیار گروه سازه و زلزله دانشکده عمران، دانشگاه صنعتی شاهرود | ||
| 2دانشجوی دکترای عمران سازه، دانشگاه صنعتی نوشیروانی بابل، ایران | ||
| 3کارشناسی ارشد مهندسی عمران، موسسه آموزش عالی پردیسان مازندران | ||
| چکیده | ||
| در این تحقیق با انجام مطالعات میدانی وسیع در ساختمان های ساخته شده شمال کشور با بررسی ضعف های متعارف اجرایی، عملکرد لرزهای ساختمان های بتن آرمه با سیستم قاب خمشی کوتاه، متوسط و بلند مرتبه بررسی گردید. ضعف سازهای از جمله مقاومت کم بتن و طول نا کافی وصله میلگردهای ستونها در مدلسازیها در نظر گرفته شد. مدلها به صورت سه بعدی تحت بیست رکورد دور از گسل زلزله در نرم افزار اوپنسیس تحلیل دینامیکی غیرخطی فزاینده شدند. سپس به روشهای احتمالاتی و با در نظر گیری عدم قطعیتهای موثر شامل مقاومت بتن و مشخصات زلزله، احتمال آسیب پذیری لرزه ای و منحنی شکنندگی این ساختمانها ترسیم گردید. در گام بعدی ستونهای سازهها با استفاده از ژا کت فولادی مقاوم سازی شدند و میزان خسارت لرزه ای آنها در سطوح عملکردی مختلف به کمک منحنی های شکنندگی لرزه ای بدست آمد. با مقایسه مقادیر میانه شکنندگی لرزه ای مدلهای دارای ضعف سازه ای و مدلهای مقاوم سازی شده مشاهده گردید که در ساختمان های مورد بررسی مقادیر میانه شکنندگی لرزه ای بطور چشمگیری در مدلهای مقاوم سازی شده افزایش یافته است. ضمنا مشاهده گردید که اثربخشی روش مقاوم سازی در نظر گرفته شده علاوه بر سطح آسیب به تعداد طبقات ساختمان نیز بستگی دارد. | ||
| کلیدواژه‌ها | ||
| ارزیابی آسیب پذیری؛ مقاوم سازی؛ ژاکت فولادی؛ منحنی شکنندگی؛ نرم افزار اوپنسیس | ||
| عنوان مقاله [English] | ||
| Probabilistic Seismic Vulnerability assessment of RC Frame Structures Retrofitted with Steel Jacketing | ||
| نویسندگان [English] | ||
| hossein pahlavan1؛ ali naseri2؛ armin einolahi3 | ||
| 1Assisstant Professor of Earthquake Engineering, Shahrood University of Technology | ||
| 2Ph.D. Candidate of Structural Engineering, Babol Noshirvani University of Technology | ||
| 3Msc. student of Structural Engineering, University of Pardisan, Mazandaran. | ||
| چکیده [English] | ||
| A majority of Iranian residential buildings have Reinforced Concrete (RC) frame structures with intermediate ductility. Recent earthquakes have revealed major seismic deficiencies in these buildings, some of which led to catastrophic collapses and significant death tolls. Causes for the unsatisfactory performance include the absence of special seismic detailing of key structural elements, inadequate material and construction quality. Based on an extensive field investigation done by the authors on the short, mid-rise and high-rise Northern Iranian as-built structures having RC frames, in this study, reduced strength of concrete and also insufficient overlap length of column’s longitudinal bars are considered as common structural deficiencies and then by considering probable uncertainties such as material and earthquake uncertainty, the seismic performance of considered buildings are developed via fragility curves based on probabilistic method. For generation of seismic fragility curves for as built and also retrofitted models, 3 dimensional analytical models analyzed based on Incremental Dynamic Analysis (IDA) in OpenSEES. The demand statistics in terms of maximum inter– story drift ratio are obtained for 20 sets of ground motion records and the capacity is determined according to the HAZUS-MH limit states and finally the corresponding fragility curves for four damage states are developed for as built and retrofitted models. The results represent the effect of the story numbers, structural deficiency and implemented retrofit strategy on the seismic vulnerability of this subclass of structures. | ||
| کلیدواژه‌ها [English] | ||
| Seismic Vulnerability, Retrofit, Steel Jacket, Fragility curve, OpenSEES | ||
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| مراجع | ||
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[1] Handbook on seismic retrofit of building, 2007. Central pub- lic works department and INDIAN building congress in associa- tion with INDIAN institute of technology-MADRAS, chapter 9. [2] Fardis, M.N., 2009. Seismic design, assessment and retrofitting of concrete buildings: based on EN-Eurocode 8(Vol. 8). Springer Science & Business Media. [3] Code No. 360, 2007. Islamic Republic of Iran, Management and Planning Organization, Instruction for Seismic Rehabilitation of Existing Buildings. [4] Chai, Y.H., Priestley, M.N. and Seible, F., 1994. “Analytical model for steel-jacketed RC circular bridge columns”. Journal of Structural Engineering, 120(8), pp.2358-2376. [5] Aboutaha, R.S., Engelhardt, M.D., Jirsa, J.O. and Kreger, M.E., 1999. “Rehabilitation of shear critical concrete columns by use of rectangular steel jackets”. Structural Journal, 96(1), pp.68- 78. [6] Shinozuka, M., Kim, S.H., Kushiyama, S. and Yi, J.H., 2002. “Fragility curves of concrete bridges retrofitted by column jacketing”. Earthquake Engineering and Engineering Vibration, 1(2), pp.195-205. [7] Xiao, Y. and Wu, H., 2003. “Retrofit of reinforced concrete columns using partially stiffened steel jackets”. Journal of Structural Engineering, 129(6), pp.725-732. [8] Smyth, A.W., Altay, G., Deodatis, G., Erdik, M., Franco, G., Gülkan, P., Kunreuther, H., Luş, H., Mete, E., Seeber, N. and Yüzügüllü, O., 2004. “Probabilistic benefit-cost analysis for earthquake damage mitigation: Evaluating measures for apartment houses in Turkey”. Earthquake Spectra, 20(1), pp.171- 203. [9] Aziminejad, A.S. and Moghadam, A., 2007. “Effects of strength distribution on fragility curves of asymmetric single story building”, Proceedings of the Ninth Canadian Conference on Earthquake Engineering Ottawa, Ontario, Canada. [10] Barkhordary, M. and Tariverdilo, S., 2011. “Vulnerability of ordinary moment resistant concrete frames”. Earthquake Engineering and Engineering Vibration, 10(4), pp.519-533. [11] Abdel-Hay, A.S. and Fawzy, Y.A.G., 2015. “Behavior of partially defected RC columns strengthened using steel jackets”. HBRC Journal, 11(2), pp.194-200. [12] Belal, M.F., Mohamed, H.M. and Morad, S.A., 2015. “Behavior of reinforced concrete columns strengthened by steel jacket”. HBRC Journal, 11(2), pp.201-212. [13] Vecchio, F.J. and Emara, M.B., 1992. “Shear deformations in reinforced concrete frames”. ACI Structural Journal, 89(1), pp.46-56. [14] Standard No. 2800., 2005. Iranian code of practice for seismic resistant design of building. Third ed., Building and Housing Research Center, BHRC publication, Tehran. [15] Mazzoni, S., McKenna, F. and Fenves, G.L., 2005.OpenSees command language manual”. Pacific Earthquake Engineering Research (PEER) Center, 264. [16] Ramanathan, N.K. (2012), “Next generation seismic fragility curves for California bridges incorporating the evolution in seismic design philosophy,” Ph.D. thesis, Georgia Institute of Technology, Atlanta [17] Elnashai, A.S., Pinho, R. and Antoniou, S., 2000. “INDYAS-A Program for Inelastic Dynamic Analysis of Structures”. Engineering Seismology and Earthquake Engineering Report No. ESEE 00-2, Imperial College, London. [18] Mander, J.B., Priestley, M.J. and Park, R., 1988. “Theoretical stress-strain model for confined concrete”. Journal of structural engineering, 114(8), pp.1804-1826. [19] Pacific Earthquake Engineering Research Center, Regents of the University of California, web site: http://peer.berkeley.edu/ smcat/sites.html [20] FEMA. Quantification of building seismic performance factors. FEMA P695. 2009. Federal Emergency Management Agency, Washington, DC. [21] Anagnos, T., Rojahn, C. and Kiremidjian, A., 1995. “NCEER-ATC joint study on fragility of buildings”. [22] Murao, O. and Yamazaki, F., 2000. “Development of fragility curves for buildings in Japan”. Confronting Urban Earthquakes: Report of Fundamental Research on the Mitigation of Urban Disasters Caused by Near-Field Earthquakes, pp.226-230. [23] Nielson, B.G., 2005. “Analytical Fragility curves for highway bridges in moderate seismic zones”. A Thesis presented for PHD degree. School of civil and environmental engineering Georgia institute of Technology, 400 pp. [24] HAZUS-MH MR5, 2003. “Multi-Hazard loss Estimation Methodology, Earthquake Model.” Washington, DC, USA: Federal Emergency Management Agency. [25] Sakino, K. and Sun, Y., 2000, January. “Steel jacketing for improvement of column strength and [26[ ductility”. In 12th world conference earthquake engineering (Vol. 1985). [26] Priestley, M. J. N., Seible, F., and Calvi, G. M., 1996. “Seis- mic Design and Retrofit of Bridges”, John Wiley & Sons. | ||
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