Investigation of Limit States Specified for Reinforced Concrete Column Members in TEC–2007
In this study, the deformation based limit states stipulated for reinforced concrete members in the Turkish Earthquake Code (TEC) were experimentally investigated. Thus four RC cantilever columns which have low concrete compressive strengths and have not adequate confinement, were subjected to constant axial load and cyclic lateral load history. In the study, firstly, the strain values representing the damage limits were converted to top of the column lateral displacements by using fundamentals of structural mechanics. Subsequently the column damages corresponding to the displacement demands were observed, hence limit states were evaluated. After conducting all column tests, it was noted that no column damage was observed for the immediate occupancy (IO) performance level defined in the code. For the life safety (LS) and collapse prevention (CP) performance levels, though somewhat residual deformations occurred on the critical regions, the column members can pretty much sustain their lateral load capacities. It was also observed for all columns that significant damages and strength losses occurred beyond the collapse prevention level. The results of experimental study indicate that the evaluation procedure in the TEC is still in good relationship with the limit states even if the columns have not adequate compressive strength and confinement.
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Acun, B. ve Sucuoğlu, H. (2011). Betonarme kolonların şekildeğiştirme performans sınırlarının deneysel gözlemlerle değerlendirilmesi, İMO Teknik Dergi, 5523-5541.
ASCE/SEI 41-06, (2007). Seismic rehabilitation of existing buildings, American Society of Civil Engineers (ASCE), Reston, Virginia.
CEN Eurocode–8, (2005). Design of structures for earthquake resistance–Part 3: Assessment and retrofitting of buildings, Comité Européen de Normalisation, Bruxelles.
DBYBHY, (2007). Deprem bölgelerinde yapılacak yapılar hakkında yönetmelik, Bayındırlık ve İskan Bakanlığı, Ankara.
Ekici, E. (2011). Comparison of observed structural damage and code given structural performance limits, Master of Science Thesis, İstanbul Technical University Institute of Science and Technology, İstanbul.
Kazaz, I., Gülkan, P. and Yakut, A. (2012). Performance limits for structural walls: An analytical perspective, Engineering Structures, 43 105–119. doi:10.1016/j.engstruct. 2012.05.011
King, D.J., Priestley, M.J.N. and Park, R. (1986). Computer programs for concrete column design, Research Report 86/12, Department of Civil Engineering, University of Canterbury, New Zealand.
Mander, J.B., Priestley, M.J.N. and Park, R. (1988a). Theoretical stress-strain model for confined concrete, ASCE Journal of the Structural Division, 114(8), 1827-1849.
Mander, J.B., Priestley, M.J.N. and Park, R. (1988b). Observed stress-strain behavior of confined concrete, ASCE Journal of the Structural Division, 114(8), 1804-1826.
Montejo, L.A. and Kowalsky, M.J. (2007). CUMBIA-Set of codes for the analysis of reinforced concrete members, Technical Report No: IS-07-01, CFL, North Carolina State University, Raleigh, NC.
Paulay, T. and Priestley, M.J.N. (1992). Seismic Design of Reinforced Concrete and Masonry Buildings, John Wiley and Sons, New York.
Priestley, M.J.N. (1993). Myths and fallacies in earthquake engineering – conflicts between design and reality, Bulletin of the New Zealand National Society for Earthquake Engineering, 26(3), 329-341.
Priestley, M.J.N., Seible, F. and Calvi, G.M. (1996). Seismic Design and Retrofit of Bridges, John Wiley and Sons, New York.
Priestley, M.J.N. and Calvi, G.M. (1997). Concepts and procedures for direct displacement-based design and assessment, Seismic Design Methodologies for the Next Generation of Codes: Proceedings of International Conference at Bled, Slovenia. A.A. Balkema, Rotterdam/Brookfield.
Priestley, M.J.N. and Kowalsky, M.J. (2000). Direct displacement-based seismic design of concrete buildings, Bulletin of the New Zealand National Society for Earthquake Engineering, 33(4), 421-444.
Priestley, M.J.N., Calvi, G.M. and Kowalsky, M.J. (2007). Displacement-Based Seismic Design of Structures, IUSS Press, Pavia, Italy.
Özal, A.K. (2008). Evaluation of deformation capacity criteria of Eurocode 8, Master of Science Thesis, The Kandilli Observatory and Earthquake Research Institute, İstanbul.
Solmaz, T. (2010). Evaluation of performance based displacement limits for reinforced concrete columns under flexure, Master of Science Thesis, The Graduate School of Natural and Applied Sciences of Middle East Technical University, Ankara.
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