Flat Plates in Seismic Areas: Comparison of Shear Reinforcement Systems
2007 (English)In: ACI Structural Journal, ISSN 0889-3241, Vol. 104, no 6, 712-721 p.Article in journal (Refereed) Published
Four full-scale flat plate specimens, two with shear studs and two with ductilityreinforcement, were tested for cyclic lateral displacement to simulate the behavior of an interior slab-column connection in a flat plate with the factored gravity load 10.5 kN/m2(220 lb/ft2) during a major earthquake. Punching occurred for the specimens with shearstuds at a 2% interstory drift ratio for recorded unbalanced moments that were considerably lower than the specimens' nominal cyclic capacity according to ACI 421.1R-99. Although the specimens with ductility reinforcement were designed for gravity-type loading only, they endured a larger interstory drift than the specimens with shear studs. Their residual gravity load capacity after cyclic lateral displacements up to 5% drift ratio corresponded to all top flexural reinforcement over the specimen width reaching its ultimate strength. This indicates very good safety against collapse and offers a consistent design method for flat plates in seismic areas at which assessment of transferred moment between slab and column is not required.
Place, publisher, year, edition, pages
2007. Vol. 104, no 6, 712-721 p.
bars; ductility; flexural capacity; interstory drift; plates; seismic; shear; stirrups; studs
IdentifiersURN: urn:nbn:se:kth:diva-78183ISI: 000250546000007OAI: oai:DiVA.org:kth-78183DiVA: diva2:492327
QC 201203062012-02-072012-02-072012-03-06Bibliographically approved