saujs Sakarya University Journal of Science 2147-835X Sakarya University 10.16984/saufenbilder.471209 Civil Engineering İnşaat Mühendisliği Seismic Design Evaluation of T Shaped Irregular Rc Building Plans By Using Pushover Analysis https://orcid.org/0000-0002-9720-5082 Mert Necati SAKARYA UNIVERSITY, FACULTY OF ENGINEERING, DEPARTMENT OF CIVIL ENGINEERING https://orcid.org/0000-0002-4200-8663 Nzapfakumunsi Alexis 04 01 2019 23 2 259 268 10 16 2018 11 22 2018 Copyright © 1997, Sakarya University Journal of Science 1997 Sakarya University Journal of Science

This study has been conducted to find out howTurkish Seismic Code 2007 is effective in providing the Life Safety (LS) andPerformance Level (PL) of T shaped plan irregularities reinforced concretemulti-story buildings; with special lateral loads bearing moment frame systems.For this purpose, a set of 12 multi-story residential buildings: 3- rectangularplans as reference and their respective 9- different T shaped plans of 3-, 6-and 8- stories were considered in the North Anatolian Fault Zone (NAFZ) Turkeyand were designed based on the code. Then, a modal and a static non-linearpushover analysis were conducted for all buildings. Base shear forces and roofsdisplacement for each building were computed. Besides, the formation trend ofplastic hinges and their respective distribution in the entire buildings wereinspected for evaluating the seismic performances. Results show that for somebuildings the expected performance level which is LS has been overreached andeven in some cases buildings reach the collapse prevention level. Based onthis, it seems that the code provisions still require further upgrading tocreate enough confidence in the civil engineering community.

 Pushover Analysis RC Building T Shaped Plans Life Safety (LS) [1] P. Fajfar, "A nonlinear analysis method for performance-based seismic design," Earthquake spectra, no. 16.3, pp. 573-592, 2000. [2] Hosseini M, Yaghoobi F and Vayeghan, "Design Verification of an Existing 8-Story Irregular Steel Building by 3-D Dynamic and Push-over Analyses," in Proceedings of the 12th World Conference on Earthquake Engineering (12WCEE), New Zealand, 2000. [3] Goulet C.A, Haselton C. B, Mitrani-Reiser J, Beck J.L, Deierlein G, Porter K.A, et al, "Evaluation of the seismic performance of a code‐conforming reinforced‐concrete frame building—from seismic hazard to collapse safety and economic losses," Earthquake Engineering & Structural Dynamics, 36(13), 1973-1997., no. 36(13), pp. 1973-1997, 2007. [4] Boonyapinyo V, Choolpool N, Warnitchai P, "Seismic Performance Evaluation of Reinforced-Concrete Buildings by Static Pushover and Nonlinear Dynamic Analyses," in 14th World Conference on Earthquake Engineering, 2008, October. [5] Epackachi S, Mirghaderi R, Esmaili O, "Seismic evaluation of a 56‐storey residential reinforced concrete high‐rise building based on nonlinear dynamic time‐history analyses," The Structural Design of Tall and Special Buildings, vol. 4, no. 21, pp. 233- 248, 2012. [6] P. Panyakapo, "Cyclic Pushover Analysis procedure to estimate seismic demands for buildingspp.," Engineering Structures. Elsevier Ltd 66, pp. 10-23, doi: 10.1016/j.engstruct.2014.02.001, 2014. [7] W. T. Thwin, "Seismic Response Evaluation of Reinforced Concrete Building with Time History Analysis," 2014. [8] H. Moniri, "Evaluation of seismic performance of reinforced concrete buildings using incremental dynamic analysis (IDA) for near field earthquakes," Doctoral dissertation, Eastern Mediterranean University (EMU)-Doğu Akdeniz Üniversitesi (DAÜ), 2014. [9] Falamarz-Sheikhabadi, Zerva A, M.R, "Effect of numerical soil-foundation-structure modeling on the seismic response of a tall bridge pier via pushover analysis," Soil Dynamics and Earthquake Engineering. Elsevier, 90, pp. 52-73 doi: 10.1016/j.soildyn.2016.08.020., 2016. [10] Fiore A, Spagnoletti G, Greco R, "On the prediction of shear brittle collapse mechanisms due to the infill-frame interaction in RC buildings under pushover analysis," Engineering Structures. Elsevier Ltd, 121, pp. 147-159 doi: 10.1016/j.engstruct.2016.04.044, 2016. [11] Menegotto M, Pinto PE, "Method of analysis for cyclically loaded RC plane frames including changes in geometry and non-elastic behavior of elements under combined normal force and bending," in Symposium on the resistance and ultimate deformability of on the resistance and ultimate deformability of structures acted on by well-defined loads. International Association for Bridges and Structural Engineering; 1973. p. 15–22. [12] Hosseini M, Hashemi B and Greco R, "Seismic Design Evaluation of Reinforced Concrete Buildings for Seismic Design Earthquakes Evaluation of Reinforced Concrete Buildings by Using Nonlinear Time History for Near-Source Earthquakes Analyses by Using Nonlinear Time History Analyses," ScienceDirect Procedia Engineering. Elsevier B.V., 199, , p. 176–181. doi: 10.1016/j.proeng.2017.09.225., 2017. [13] Settlement Ministry of Public Works "Turkish Earthquake Resistant Design Code," Ankara, 2007. [14] Kamath K, Hirannaiah S. and Noronha J.C, "An analytical study on performance of a diagrid structure using nonlinear static pushover analysis," Perspectives in Science. Elsevier GmbH, 8, p. 90–92. doi: 10.1016/j.pisc.2016.04.004., 2016. [15] Mander JB, Priestley MJN, Park R, " Theoretical stress–strain model for confined concrete.," ASCE J Struct Eng, no. 114(8):1804–26, 1988. [16] XTRACT 3.0.8, " Cross-sectional structural analysis of components; 2007.".