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.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 10 • October 2016
Copyright
© 2016 American Society of Civil Engineers.
History
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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