INVESTIGADORES
OLLER  Sergio Horacio Cristobal
artículos
Título:
Seismic performance of waffled-slab floor buildings
Autor/es:
J. C. VIELMA; A. BARBAT; S. OLLER
Revista:
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-STRUCTURES AND BUILDINGS
Editorial:
THOMAS TELFORD PUBLISHING
Referencias:
Año: 2009 vol. 162 p. 169 - 182
ISSN:
0965-0911
Resumen:
The codes used in seismic design of waffled-slab floors buildings (WSFB), such as the Spanish NCSE-02 earthquake-resistant design code, assign them restricted ductility, utilise linear structural analysis based on modal analysis, but also consider the structural ductilityconcept. Uncertainties arise whenever these codes are applied to the special case of buildings with waffled-slab floors, the ductility of which is doubtful. In many cases,during earthquakes, buildings with restricted ductility are unable to reach the ductility values assumed in the design process, although they may exhibit adequate values of overstrength. This paper therefore studies typical WSFB by applying static incremental non-linear analysis procedures (pushover analysis) in order to calculate their actual structural ductility and overstrength values. Fragility curves corresponding to different damage states and damage probability matrices are also calculated and compared with those of momentresisting frame buildings (MRFB) in order to obtain useful conclusions for earthquake resistant design. One of the most relevant conclusions of this article is that theuse of a better confinement and of ductile steel can only improve the seismic behaviour of MRFB but not that of WSFB.