Performance of Flat Roofs Made of Wooden Beams and Straw-Mud Mixture in the 2012 Twin Earthquakes of Ahar and Varzaghan, East Azarbaijan, Iran
Publication: Journal of Performance of Constructed Facilities
Volume 28, Issue 2
Abstract
Roofs covering buildings in the rural areas in Ahar and Varzaghan regions, prior to the August 11, 2012, twin earthquakes, can be categorized into three main groups: flat roofs composed of wooden beams together with a plaster of straw-mud/clay mixture, traditional masonry dome or vault, and rarely, a steel I-beam jack-arch system. Similar to other earthquakes such as the 2003 Bam, Iran, earthquake, the collapse of nonengineered masonry roofs and floor slabs during the earthquakes was the most important factor causing a large number of fatalities. The observed behavior and the performance of the first group of roofs after the earthquakes are demonstrated here, some matters of interest are discussed, and some aspects of the existing construction methods in rural areas are assessed. The poor seismic performance of traditional building roofs made of wooden beams and mud is noted.
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References
Ambraseys, N. N. (1963). “The Buyin-Zara Iran earthquake of Sept. 1962: A field report.” Bull. Seismol. Soc. Am., 53(4), 705–740.
Ambraseys, N. N., and Melville, C. P. (1982). A history of Persian earthquakes, Cambridge University Press, London.
Ambraseys, N. N., and Tchalenko, J. S. (1969). “The Dasht-e-Bayaz Iran earthquake of August 31 1968: A field report.” Bull. Seismol. Soc. Am., 59(5), 1751–1792.
Bayraktar, A., Coşkun, N., and Yalçin, A. (2007). “Performance of masonry stone buildings during the March 25 and 28, 2004 Aşkale (Erzurum) earthquakes in Turkey.” J. Perform. Constr. Facil., 432–440.
Iranian National Building Codes (INBC). (2009). Section No. 6: Loading on building structures, Building and Housing Research Center, Tehran, Iran.
Maheri, M. R. (1998). “Lessons from Golbaf, Kerman earthquake of March 14, 1998.” Proc., 1st Iran-Japan Workshop on Recent Earthquakes in Iran and Japan, International Institute of Earthquake Engineering and Seismology (IIEES), Kobe, Japan, 319–330.
Maheri, M. R. (2005). “Performance of building roofs in the 2003 Bam, Iran, earthquake.” Earthq. Spectra, 21(S1), 411–424.
Maheri, M. R., Naeim, F., and Mehrain, M. (2005). “Performance of adobe residential buildings in the 2003 Bam, Iran, earthquake.” Earthq. Spectra, 21(S1), 337–344.
Maheri, M. R., and Rahmani, H. (2003). “Static and seismic design of one-way and two-way jack arch masonry slabs.” Eng. Struct., 25(13), 1639–1654.
Moinfar, A. A. (1968). “Seismic activities and conditions of rural houses in countries of the region.” Proc., CENTO Conf. on Earthquake Hazard Minimization, Office of the U.S. Economic Coordinator for CENTO Affairs, Ankara, Turkey, 109–111.
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© 2014 American Society of Civil Engineers.
History
Received: Sep 25, 2012
Accepted: Jan 2, 2013
Published online: Jan 4, 2013
Published in print: Apr 1, 2014
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