Seismic Vulnarability Assessment of Reinforced Concrete Buildings Located in Esenler District of İstanbul

Yıl 2018, Cilt: 18 Sayı: 1, 285 - 294, 30.04.2018

Hasan Özkaynak Ayşe Elif Özsoy Özbay

Öz

Istanbul is one of the largest cities of Turkey which is located on the regions where there is high seismic activities. Recent studies performed on mid-rise reinforced concrete (RC) structures showed that majority of the existing building stock does not conform to current seismic code requirements and they can be evaluated as vulnerable structures. The seismic performance evaluation of an existing buildings can be conducted by using nonlinear procedures stated in Turkish Earthquake Code (TEC-07). According to the code, an existing building completing its economic lifetime and/or having a performance level in between “Life Safety” to “Collapse Prevention” under the effect of Design Earthquake is defined as “building under seismic risk”. Before going into such a detailed seismic evaluation procedure for each building, there is a need for regional screening surveys to rank the building stock in terms of the potential seismic hazard. This study aims to assess the seismic vulnerability of a group of midrise RC buildings located in Esenler District of İstanbul employing the Rapid Visual Screening (RVS) procedure. In this study, valuable results have been derived to rank the buildings in terms of seismic vulnerability of existing structures located in Istanbul. It is concluded that the number of stories is the key parameter to change the priority range of the building from lowest to highest level. Majority of the buildings with the highest priority level (0≤PS≤30) suffer from the parameters related with poor construction quality, soft story irregularity and the heavy overhang. The aforementioned method could be used to estimate the performance scores of the buildings to determine the priority for more detailed seismic risk assessment procedures.

Anahtar Kelimeler

Rapid visual screening; Seismic assesment; Street visual surveying; Reinforced concrete structures; Earthquake performance.

Kaynakça

• FEMA P-154, Rapid Visual Screening of Buildings for Potential Seismic Hazards: A Handbook, January 2015. Sozen, M. A. and A. F. Hassan, 1997. Seismic Vulnerability Assessment of Low-Rise Buildings in Regionswith Infrequent Earthquakes. ACI Structural Journal, 94(1), 31-39
• . Gulkan, P. and M. A. Sozen, 1999. Procedure for Determining Seismic Vulnerability of Building Structures. ACI Structural Journal, 96(3), 336-342
• . Ozcebe, G., Yucemen, M. S., Aydogan, V., and A. Yakut, 2003. Preliminary Seismic Vulnerability assessment of Existing Reinforced Concrete Buildings in Turkey- Part I: Statistical Model Based on Structural Characteristics, Seismic Assessment and Rehabilitation of Existing Buildings, NATO Science Series IV/29, 29-42.
• Yakut, A., Aydogan, V., Ozcebe, G and M. S. Yucemen, 2003. Preliminary Seismic Vulnerability Assessment of Existing Reinforced Concrete Buildings in Turkey -Part II: Inclusion of Site Characteristics, Seismic Assessment and Rehabilitation of Existing Buildings, NATO Science Series IV/29, 43-58
• Sucuoglu, H. and U. Yazgan, 2003. Simple Survey Procedures for Seismic Risk Assessment in: Urban Building Stocks, Seismic Assessment and Rehabilitation of Existing Buildings, NATO Science Series IV/29, 97-118.
• Japan International Cooperation Agency (JICA) Istanbul Metropolitan Municipality (IMM) 2002. The Study on A Disaster Prevention / Mitigation Basic Plan in Istanbul including Seismic Microzonation in the Republic of Turkey, Final Report
• . Ozcebe G, Sucuoglu H, Yucemen Ms, Yakut A and Kubin J. 2006. Seismic Risk Assessment of Existing Building Stock in Istanbul – A Pilot Application In Zeytinburnu District. 8th National Conference on Earthquake Engineering. Earthquake Engineering Research Institute, San Francisco
• . Istanbul Metropolitan Municipality (2003), Earthquake Master Plan for Istanbul, Istanbul.
• M. R. Sadat, M. S. Huq, M. A. 2010. Ansary, Seismic vulnerability assessment of buildings of Dhaka city. Journal of Civil Engineering (IEB), 38 (2), 159-172.
• A. Sarraz, M.K.A. Debesh and C. Das. 2015. Seismic Vulnerability Assessment of Existing Building Stocks at Chandgaon in Chittagong City, Bangladesh. American Journal of Civil Engineering. 3(1), 1-8.
• M.J. Alam, A.R. Khan and A. Paul. 2008. Seismic Vulnerability Assessment of Existing RC Buildings in GIS Environment. Online Proc. of 14th World Conference on Earthquake Engineering (WCEE), Beijing, China.
• E. Işık, 2013. Bitlis İli Yapı Stoğunun Birinci Kademe (Sokak Tarama Yöntemi İle) Değerlendirilmesi, Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 17(1), 173-178.
• U. Albayrak, M. Canbaz, G. Albayrak. 2015. Rapid seismic risk assessment method for existing building stock in urban areas. International Conference on Sustainable Design, Engineering and Construction, Procedia Engineering 118, 242 – 1249.
• H. Tischer, McClure, G. and Mitchell, D. 2012. Development of a seismic vulnerability assessment method for schools in Eastern Canada. Proceedings of the 15th World Conference on Earthquake Engineering (15WCEE), Lisbon, Portugal, September 24-28, Paper 519, 10 p.