Verification of a Proposed Assessment Method Applied to Concrete Buildings Collapsed During Sarpol-e Zahab, Iran Earthquake
Detecting the buildings experiencing collapse against future earthquakes is the most vital for seismic urban areas in Iran because of its irreparable consequences. Once again, the occurrence of Sarpol-e Zahab Earthquake (Mw=7.3) reminded us of this necessity where structural collapses resulted in a large number of casualties. A simplified methodology is developed to assess the collapse of mid-rise concrete buildings during earthquakes in Iran. Besides, an attempt is made to verify this method through analyzing the recorded data of the collapsed buildings suffered from Sarpol-e Zahab earthquake of November 12, 2017, and considers whether the occurrence of the collapse could be anticipated or not. Three severely damaged buildings were selected, located in Sarpol-e Zahab, to verify this proposed methodology. They are 2 or 3 story buildings having moment resisting frames. The buildings are analyzed through nonlinear analysis. The well-calibrated nonlinear model is adopted for the nonlinear analysis. The intensity of damages are observed and recorded by the authors. The pushover analysis is conducted for them. Drifts evaluated by pushover analysis are compared to those recorded in the buildings. One of the buildings was a bare frame that its partitions and infill walls are not still constructed. This building had much better performance than two others and experienced less loss. Moreover, the results of the analysis show that the collapse criteria related to the seismic evaluation codes are non-conservative. The results of this survey imply that the proposed method can precisely forecast the collapse or non-collapse of the studied buildings. Therefore, it would be recognized as a reliable method for collapse assessment.
Villaverde, R. (2007) Methods to assess the seismic collapse capacity of building structures: state of the art. Journal of Structural Engineering, 133(1), 57-66.
Brozovic, M. and Dolsek, M. (2014) Envelope based pushover analysis procedure for the approximate seismic response analysis of buildings. Earthquake Engineering & Structural Dynamics, 43(1), 77-96.
Ibarra, L.F., Medina, R.A., and Krawinkler, H. (2005) Hysteretic models that incorporate strength and stiffness deterioration. Earthquake Engineering and Structural Dynamics, 34(12), 1489-1511.
Galanis, P.H. and Moehle, J.P. (2012) Development of collapse indicators for older-type reinforced concrete buildings. 15th World Conference on Ear thquake Engineering (15WCEE), Portugal.
Zahedi, M. and Eshghi, S. (2017) Seismic collapse risk assessment of mid-rise concrete buildings in Tehran megacity. COMPDYN 2017 - 6th International Thematic Conference, Rhodes Island (Greece), National Technical University of Athens.
McKenna, F., Fenves, G.L., Filippou, F.C., and Scott, M.H. (2016) Open System for Earthquake Engineering Simulation (OpenSees). Berkeley: Pacific Earthquake Engineering Research
Center, University of California.
Luca, F. De. and Verderame, G.M. (2014) Seismic vulnerability assessment: reinforced concrete structures. Encyclopedia of Earthquake Engineering, 1-31.
Haselton, C.B., Goulet, C.A., Mitrani-Reiser, J., Beck, J.L., Deierlein, G.G., Porter, K.A., and Taciroglu, E. (2007) An assessment to benchmark the seismic performance of a code-conforming
reinforced-concrete moment-frame building. Pacific Earthquake Engineer ing Research Center , 2007/12.
Panagiotakos, T.B. and Fardis, M.N. (2001) Deformations of reinforced concrete members at yielding and ultimate. Structural Journal, 98(2), 135-148.
Haselton, C.B., Liel, A.B., Deierlein, G.G., Dean, B.S., and Chou, J.H. (2010) Seismic collapse safety of reinforced concrete buildings. I: Assessment of ductile moment frames. Journal of Structural Engineering, 137(4), 481-491.
Cimellaro, G.P., Nagarajaiah, S., and Kunnath, S.K. (2014) Computational Methods, Seismic Protection, Hybrid Testing and Resilience in Earthquake Engineering. A Tribute to the Research Contributions of Professor Andrei Reinhorn (Ed.).
Bracci, J.M., Kunnath, S.K., and Reinhorn, A.M. (1997) Seismic performance and retrofit evaluation of reinforced concrete structures. Journal of Structural Engineering, 123(1),
FEMA (2009) Quantification of Building Seismic Per formance Factor s . Federal Emergency Management Agency (FEMAP695).
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