荷重低下域における柱の挙動を考慮した被災RC造建物の非線形骨組解析 : 三陸はるか沖地震における八戸東高校の検討

概要

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A three-story R/C school building suffered severe damages during the 1994 Sanriku Haruka-Oki Earthquake. Most first-story columns failed in shear while second- and third-story members remained nearly intact. Nonlinear frame analysis was conducted to reproduce the observed damages to this building, where the load-deflection relations of columns including post-peak region were determined based on test results. The analysis was found to reproduce the observed damages. The beams above the second floor level were computed to have once yielded but have been unloaded after shear failure of the first-story columns. The unloading of the beams that resulted from the decrease of each story shear following the deterioration of the first-story column strength was the reason of their observed slight damage.
2005-11-30