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Title
Japanese: 
English:Collapse Mechanism of Wide-area Suspended Ceiling in School Gymnasium 
Author
Japanese: 佐々木 智大, 青井 淳, 梶原 浩一, 田川 浩之, 佐藤 大樹.  
English: Tomohiro SASAKI, Atsushi AOI, Koichi KAJIWARA, Hiroyuki TAGAWA, Daiki SATO.  
Language English 
Journal/Book name
Japanese: 
English:Proceedings of the IASS Annual Symposium 2016 
Volume, Number, Page         1037
Published date Sept. 2016 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
File
Abstract In the 2011 off the Pacific coast of Tohoku Earthquake, many suspended ceilings and other suspended equipment fell down due to the lack of their resistance to earthquakes. To mitigate severe damage to ceiling system caused by earthquakes, new seismic design code for suspended ceiling system was issued by the Ministry of Land, Infrastructure, Transportation and Tourism. However, the mechanism why and how suspended ceiling system falls down during earthquakes has not yet been clarified. In order to clarify the collapse mechanism of wide-area ceiling system and development of its countermeasure, new research project was launched and first series of full-scale shake-table experiments of wide-area ceiling system in school gymnasium was conducted. Based on experimental results, collapse mechanism of nonseismic ceiling was clarified and it was found that failure mechanism of the seismically designed ceiling depends on the ratio of strength of ceiling braces and its metal joints.

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