000019029 001__ 19029
000019029 005__ 20170118182256.0
000019029 04107 $$aeng
000019029 046__ $$k2017-01-09
000019029 100__ $$aNakamura, Takaya
000019029 24500 $$aIntermediate-Story Collapse of Reinforced Concrete Buildings Considering Aftershocks

000019029 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019029 260__ $$b
000019029 506__ $$arestricted
000019029 520__ $$2eng$$aThis study focuses on the intermediate-story collapse that is often seen in old reinforced concrete (RC) buildings of around 10 stories with brittle columns. Once buildings are damaged by the main shock, it is important to evaluate the effect of aftershocks to judge whether to continue to use the damaged buildings. Thus, this study aims to examine the intermediatestory collapse of RC buildings, with consideration of aftershocks, by conducting dynamic analysis. Nine- and three-story buildings are analyzed. The buildings are represented by equivalent shear building models. Model lateral load versus interstory drift relations are represented based on past collapse tests of brittle columns. Strength deterioration after maximum load is considered. Dynamic analysis is performed for various columns and ground motions, and responses of the model buildings in the post-peak regions, including collapse, are studied. Relations between the maximum drift in the main shock and the level of aftershock that induces collapse are discussed. The study reveals that the smaller the maximum drift in the main shock, the smaller the ground motion level of aftershocks that induce collapse for short-period ground motions. This result is different from the general perception. The finding shows that elongation of the period of buildings due to the large plastic response in the main shock induces the discrepancy between the period of buildings and that of ground motions of aftershocks.

000019029 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019029 653__ $$aReinforced concrete; Intermediate-story collapse; Shear failure; Aftershock

000019029 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019029 720__ $$aNakamura, Takaya$$iKawami, Ayumu
000019029 8560_ $$ffischerc@itam.cas.cz
000019029 8564_ $$s938441$$uhttps://invenio.itam.cas.cz/record/19029/files/2709.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2709.
000019029 962__ $$r16048
000019029 980__ $$aPAPER