Assessment of the Material Quality of Damaged Structures after Earthquake in Van, Turkey
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 10
Abstract
Two earthquakes occurred on October 23 and November 9, 2011, in Van, Turkey, with magnitudes () of 7.2 and 5.6, respectively. The types of the damage and collapse that occurred in both earthquakes necessitate a detailed examination of the load-bearing elements, which essentially comprise the components of RC buildings, in terms of their material quality. For this purpose, the compressive strengths, X-ray diffraction (XRD), and scanning electron microscopy with X-ray microanalysis (SEM/EDS) were performed on concrete samples collected from the collapsed buildings, with a view to understand the role of the materials in the devastation caused by the earthquakes. Visual observations and the results of the tests showed that there were not only construction and manufacturing failures, but also the strength of the concrete was a crucial factor that contributed to the damage and collapse of the buildings. In addition to these conclusions, results obtained from XRD and SEM-EDS showed that compressive strength increased with the size of calcium-silicate-hydrate (C-S-H) peaks, but much less significantly with the Ca-Si (C/S) ratio.
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Acknowledgments
The research reported in this paper was supported by the Scientific Research Projects Unit of Istanbul University (Project No. ACIP-20744). The authors would like to acknowledge the contribution of the Construction and Materials Laboratory at the Civil Engineering Department, the I. U. Scientific Research Projects Unit and the Advanced Analysis Laboratory. The authors also would like to gratefully and sincerely thank Asst. Prof. Erdem Damcı and Dr. Rasim Temur for their support.
References
ACI (American Concrete Institute). (2003). “Guide for obtaining cores and interpreting compressive strength results.” ACI 214.4 R-10, Farmington Hills, MI.
AFAD. (2011). “Republic of Turkey prime ministry disaster and emergency management presidency.” 〈http://daphne.deprem.gov.tr〉 (Oct. 30, 2011) (in Turkish).
ASTM. (2013). “Standard test method for obtaining and testing drilled cores and sawed beams of concrete.” ASTM C42M-13, West Conshohocken, PA.
Escalante-Garcia, J. I., Fuentes, A. F., Gorokhovsky, A., Fraire-Luna, P. E., and Mendoza-Suarez, G. (2003). “Hydration products and reactivity of blast-furnace slag activated by various alkalis.” J. Am. Ceramic Soc., 86(12), 2148–2153.
Güner, A., and Dawod, A. M. (1991). “Function of control standard in optimised mix design of concrete.” 2nd Int. Symp. on the Quality Control of Concrete Structures, Univ. of Ghent, Ghent, Belgium, 105–112.
Hartmann, A., Khakhutov, M., and Buhl, J.-Ch. (2014). “Hydrothermal synthesis of CSH-phases (tobermorite) under influence of Ca-formate.” Mater. Res. Bull., 51, 389–396.
ITU (Istanbul Technical University). (2011). “ITU preliminary report 23 October 2011 M7.2 Tabanlı-VAN earthquake.” 〈http://www.eedmi.itu.edu.tr/Van_Depremi/index.html〉 (Nov. 4, 2011) (in Turkish).
Jawahar, J. G., Sashidhar, C., Reddy, I. V. R., and Peter, J. A. (2013). “Micro and macro level properties of fly ash blended self-compacting concrete.” Mater. Des., 46, 696–705.
KOERI (Kandilli Observatory and Earthquake Research Institute). (2011). “The October 23, 2011 Van, Turkey earthquake () earthquake damage.” 〈http://www.koeri.boun.edu.tr〉 (Oct. 30, 2011).
Liu, X., Zhang, N., Yao, Y., Sun, H., and Feng, H. (2013). “Micro-structural characterization of the hydration products of bauxite-calcination-method red mud-coal gangue based cementitious materials.” J. Hazard. Mater., 262, 428–438.
Middle East Technical University (METU) Earthquake Engineering Research Center. (2011). “23 Ekim 2011 Mw 7.2 Van Depremi Sismik ve Yapısal Hasara İlişkin Saha Gözlemleri.”, Ankara, Turkey (in Turkish).
Neville, A. M. (2011). Properties of concrete, 5th Ed., Pearson Education, London.
TEC (Turkish Earthquake Code for Buildings). (1975). “Specification for structures to be built in disaster areas.” Ministry of Public Works and Settlement, Earthquake Research Institute, Ankara, Turkey (in Turkish).
TEC (Turkish Earthquake Code for Buildings). (2007). “Specification for buildings to be built in earthquake areas.” Ministry of Environment and Urbanization, Ankara, Turkey (in Turkish).
Tobón, J. I., Paya, J., Borrachero, M. V., Soriano, L., and Restrepo, O. J. (2012). “Determination of the optimum parameters in the high resolution thermogravimetric analysis (HRTG) for cementitious materials.” J. Therm. Anal. Calorim., 107(1), 233–239.
TSE (Turkish Standards Institute). (2002a). “Concrete—Testing hardened concrete—Part 7: Determination of the density of hardened concrete.” TS EN 12390-7, Ankara, Turkey (in Turkish).
TSE (Turkish Standards Institute). (2002b). “Requirements for design and construction of reinforced concrete structures.” TS 500/T2, Ankara, Turkey (in Turkish).
TSE (Turkish Standards Institute). (2008). “Admixtures for concrete, mortar and grout—Test methods—Part 11: Determination of air void characteristics in hardened concrete.” TS EN 480-11, Ankara, Turkey (in Turkish).
TSE (Turkish Standards Institute). (2010a). “Assessment of in-situ compressive strength in structures and precast concrete components.” TS EN 13791, Ankara, Turkey (in Turkish).
TSE (Turkish Standards Institute). (2010b). “Testing hardened concrete—Part 3: Compressive strength of test specimens.” TS EN 12390-3, Ankara, Turkey (in Turkish).
TSE (Turkish Standards Institute). (2011). “Testing concrete in structures—Part 1: Cored specimens-taking, examining and testing in compression.” TS EN 12504-1, Ankara, Turkey (in Turkish).
TSE (Turkish Standards Institute). (2013). “Testing hardened concrete—Part 1: Shape, dimensions and other requirements for specimens and moulds.” TS EN 12390-1, Ankara, Turkey (in Turkish).
TSE (Turkish Standards Institute). (2014). “Concrete—Specification, performance, production and conformity.” TS EN 206, Ankara, Turkey (in Turkish).
Wang, Q., Feng, J., and Yan, P. (2012). “The microstructure of 4-year-old hardened cement-fly ash paste.” Constr. Build. Mater., 29, 114–119.
Yang, K.-H., Cho, A.-R., Song, J.-K., and Nam, S.-H. (2012). “Hydration products and strength development of calcium hydroxide-based alkali-activated slag mortars.” Constr. Build. Mater., 29, 410–419.
YTU (Yildiz Technical University). (2011). “23 Ekim 2011 Van depremi teknik inceleme raporu.” 〈http://www.ek.yildiz.edu.tr//images/images/yayinlar/vandeprem.pdf〉 (Nov. 4, 2011) (in Turkish).
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© 2016 American Society of Civil Engineers.
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Received: Mar 2, 2015
Accepted: Feb 12, 2016
Published online: May 23, 2016
Published in print: Oct 1, 2016
Discussion open until: Oct 23, 2016
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