2005年宮城県沖の地震で天井落下被害の起きた建物の数値解析による基礎的考察 : 吊り天井の振動性状についての考察

概要

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During the Miyagiken-oki earthquake occurred at Sendai region on 16 Aug.,2005 the suspended ceiling of a public indoor swimming pool was heavily damaged and many people were injured by the failed ceilings. About ninety percent of the suspended ceiling coveting the swimming pool space was failed and fallen during the earthquake. Failure of ceilings in large roof buildings during earthquakes is repetitively reported but no reasonable explanation of such failure has been established, so far. In this article, the results of the numerical simulation of the suspended ceiling of the swimming pool mentioned above is reported. The focus was put on the general behavior of the suspended ceilings, especially in-plane rotation of the entire ceiling panel, since the ceiling was hang by the hunger bolts with different length. The results show the large displacements at the both sides of the ceiling, which may prove the symmetric failure of the ceiling.
一般社団法人日本建築学会の論文
2009-03-27