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Accession Number PB2013-109809
Title Assessment of Floor Accelerations in Yielding Buildings.
Publication Date Oct 2012
Media Count 270p
Personal Author A. E. Zaghi A. M. Itani E. Maragakis G. Pekcan J. D. Wieser
Abstract The large investment in nonstructural components in buildings and severe damage to these components in recent earthquakes necessitates improved design provisions for these components. The present study uses the OpenSees finite element framework to develop full three-dimensional models of four steel moment frame buildings. The incremental dynamic analysis method is employed to evaluate the floor response of inelastic steel moment frame buildings subjected to all three components of a suite of 21 ground motions. To better understand the acceleration demands on nonstructural components, the study focuses on the influence of structural period, level of ductility of the structure, and relative height in the building on the horizontal and vertical floor acceleration response. The horizontal floor acceleration response is shown to decrease the increasing structural period and ductility while varying nonlinearly along the height of the building. In contrast, the vertical acceleration response was found to be independent of structural period, level of ductility, and relative height. Variation in the vertical acceleration response is primarily attributed to the out-of-plane flexibility of the floor system. Significant vertical acceleration amplification is only observed away from the column supports. As a result of the study, a more realistic formulation of the peak floor acceleration response accounting for the effect of structural period and ductility is proposed and may be used to improve current code estimations is proposed.
Keywords Acceleration
Ground motion
Structural analysis

Source Agency National Science Foundation
State University of New York
NTIS Subject Category 89D - Structural Analyses
89G - Construction Materials, Components, & Equipment
48F - Geology & Geophysics
Corporate Author Nevada Univ., Reno. Dept. of Civil and Environmental Engineering.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1323
Contract Number N/A

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