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Öz

Story Drifts and Connection Rotations of Semi-Rigid Steel Frames Story drifts, connection rotations and story drift-connection rotation relationships of 6 partial strength/semi-rigid and 2 rigid frames having 7.0m and 9.0m span lengths and four different connection capacities are investigated with nonlinear dynamic analyses. In dynamic analyses 25 real ground motion records with 2 different earthquake levels and 9 far field and 9 near field artificial records are generated by using three different attenuation relations and scaled to 2 different earthquake levels are used. As a result of the analyses, the story drift ratios and the connection rotations of the frames are determined and their performance limit controls are done and the story drift ratios of partial strength/semi rigid frames and rigid frames are compared. Finally, the story drift–connection rotation relationships are investigated and the effect of connection capacity, connection hysteresis model and the distance from the fault are searched

Anahtar Kelimeler

• Partial strength/semi-rigid connection, dynamic analysis, real and artificial record, story drift ratio, connection rotation

Yarı Rijit Birleşimli Çelik Çerçevelerin Kat Öteleme ve Birleşim Dönmelerinin İncelenmesi

Öz

7.0m ve 9.0m açıklıklı, dört farklı birleşim taşıma kapasitesine sahip 6 adet yarı rijit ve 2 adet rijit birleşimli çerçevenin kat ötelemeleri, birleşim dönmeleri ve aralarındaki ilişkileri zaman tanım alanında yapılan dinamik analizlerle incelenmiştir. Dinamik analizlerde 25 adet gerçek yer hareketi, 3 farklı azalım ilişkisinden üretilen 9 adet faya uzak ve 9 adet faya yakın yapay yer hareketi 2 farklı deprem seviyesine ölçeklendirilerek kullanılmıştır. Yapılan analizler sonucunda, kat ötelemelerinin ve birleşim dönmelerinin kabul edilebilirlik kontrolleri yapılarak yarı rijit ve rijit birleşimli çerçevelerin kat ötelemeleri karşılaştırılmıştır. Son olarak, birleşim kapasitesinin, davranış modelinin ve faya olan mesafenin, maksimum birleşim dönmesi – kat ötelemesi oranına olan etkisi incelenmiştir

Anahtar Kelimeler

• Kısmı dayanımlı/yarı-rijit birleşim, dinamik analiz, gerçek ve yapay yer hareketi, kat ötelemesi, birleşim dönmesi

Kaynakça

1. Nader, M.N., Astaneh, A.A., Dynamic behavior of flexible, semirigid and rigid steel frames, Journal of Construction Steel Research, 18, 179-192, 1991
2. Nader, M.N., Astaneh, A.A., Shaking table tests of rigid, semirigid and flexible steel frames, Journal of Structural Engineering, 122, 6, 589-596, 1996
3. Elnashai, A.S., Elghazouli, A.Y., Seismic behavior of semi rigid steel frames, Journal of Constructional Steel Research, 29, 149-174, 1994
4. Elnashai, A.S., Elghazouli, A.Y., Denesh-Ashtiani, F.A., Response of semi rigid steel frames to cyclic and earthquake loads, Journal of Structural Engineering, 124, 8, 1998
5. Nader, M.N., Astaneh, A.A., Seismic behavior and design of semirigid steel frames, UCB/EERC-92/06, University of California at Berkeley, 1992
6. Maison, B.F., Kasai, K., Seismic performance of 3 and 9 story partially restrained moment frame buildings, SAC/BD-99/16, SAC Joint Venture, 2000
7. Maison, B.F., Kasai, K., Mayangarum, A., Effects of partially restrained connection stiffness and strength on frame seismic performance, SAC/BD-99/17, 2000
8. Lui, E.M., Lopez, A., Dynamic analysis and response of semi rigid frames, Engineering Structures, 19, 8, 644-654, 1997

9. Salazar, A.R., Haldar, A., Energy dissipation at PR frames under seismic loading, Journal of Structural Engineering, 12, 5, 588-592, 2001
10. Akbas, B., Shen, J., Seismic behavior of steel buildings with combined rigid and semi rigid frames, Turkish Journal of Engineering Environment Science, 27, 253-264, 2003
11. Sekulovic, M., Danilovic, M.N., Contribution to transient analysis of inelastic steel frames with semi rigid connection, Engineering Structures, 30, 976-989, 2008
12. Aksoylar, D.N., Elnashai, A.S., Mahmoud, H., The design and seismic performance of low-rise long-span frames with semi-rigid connections, Journal of Constructional Steel Research, 67, 114-126, 2011
13. Aksoylar, D.N., Elnashai, A.S., Mahmoud, H., Seismic performance of semi-rigid moment-resisting frames under far and near field records, Journal of Structural Engineering, 138, 2, 157-169, 2012
14. American Institute of Steel Construction, Inc., Seismic provisions for structural steel buildings, AISC 341S1-05, 2005
15. Deprem Bölgelerinde Yapılacak Binalar Hakkında Yönetmelik, 2007
16. Eurocode EN 1998-1, Design of structures for earthquake resistance-part 1: General rules, seismic actions and rules for buildings, CEN, European Committee for Standardization, Brussels, Belgium, 2004
17. American Institute of Steel Construction, Inc., Specification for structural steel buildings, AISC 360-05, 2005
18. American Society of Civil Engineers, Minimum design loads for building and other structures”, ASCE SEI 7-05, 2006
19. American Institute of Steel Construction, Inc., Steel design guide series 16, flush and extended multiple - row moment end-plate connections, AISC, 2003
20. Eurocode EN 1993-1-8, Design of steel structures-part 1-8: Design of joints, CEN, European Committee for Standardization, Brussels, Belgium, 2005
21. Aksoylar, N.D., Yarı rijit birleşimli çelik çerçevelerin deprem performansının belirlenmesi, Doktora Tezi, Yıldız Teknik Üniversitesi, İstanbul, Türkiye, 2009
22. Elnashai, A.S., Papanikolaou, V. Lee, D.H., Zeus-NL user manual version 1.8.1, Mid-America Earthquake Center, University of Illinois Urbana – Champaign, 2008
23. Elnashai, A.S., Elghazouli, A.Y., Performance of composite steel/concrete members under earthquake loading, part I: analytical model, Earthquake Engng Struct. Dyn. 22, 4, 314–345, 1993
24. Elnashai, A.S., Izzuddin, B.A., Modeling of material nonlinearities in steel structures subjected to transient dynamic loading, Earthquake Engng Struct. Dyn. 22, 509–532, 1993
25. FEMA 356 (Federal Emergency Management Agency), Prestandart and commentary for the seismic rehabilitation of buildings, Washington D. C, 2000
26. Housner, G.W., Spectrum intensities of strong motion earthquakes, Earthquake Engineering Research Institute from Proceedings of the Symposium on Earthquakes and Blast effects on Structures, University of California at Los Angeles, June 1952
27. Ambraseys, N.N., Simpson, K.A., Bommer, J.J., Prediction of horizontal response spectra in Europe, Earthquake Engng Struct. Dyn., 25, 371-400, 1996
28. Boore, D.M., Joyner, W.B., Fumal, T.E., Equations for estimating horizontal response spectra and peak acceleration from western North American earthquakes: A summary of recent work, Seismological Research Letters, 68, 1, 1997
29. Ambraseys, N.N., Douglas, J., Near field horizontal and vertical earthquake ground motions, Soil Dynamics and Earthquake Engineering, 23, 1-18, 2003
30. Gasparini, D.A., Vanmarcke, E.H., Simulated earthquake motions compatible with prescribed response spectra, Department of Civil Engineering, Research Report R76- 4, Massachusetts Institute of Technology, Cambridge, MA, USA, 1976