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Slotted Hole Effect on Damage Mechanism of Gymnasium Building with RC Frame and Steel Roof

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Document pages: 13 pages

Abstract: On the2011 off the Pacific Coast of Tohoku Earthquake, gymnasium buildings exhibitedthe unexpected structural damages, which prevented a use as evacuation sheltersin during- and post-disaster periods. The major failure occurring on the connection between the RC column top and steel roof as well asthe cracks in the RC column base was observedduring the emergent inspection. According to the earlier studies, it wasimplied that the presence of the slotted hole possibly deteriorates the seismiccapacity; however, the length of slotted hole was fixed at a certain value.Facing this concern, this research attempts to clarify the influence of theslotted hole length through a comprehensive parametric study by pushover andseismic response analyses. In conclusion, it has been discovered that theslotted hole deteriorates the seismic capacity for the connection failure up toalmost 50 of that without slotted hole. Moreover, the discrepancy ofcharacteristics obtained by the static and dynamic analyses is originated bymeans of the presence of slotted hole. This slotted hole effect should be notedby structural engineers and researchers to provide the adequate seismicdiagnosis and strengthening.

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