Back to Search
Start Over
Comparative Evaluation of Base-Isolated and Fixed-Base Buildings Using a Comprehensive Response Index.
- Source :
-
Journal of Structural Engineering . Jun2009, Vol. 135 Issue 6, p698-707. 10p. 1 Diagram, 4 Charts, 7 Graphs. - Publication Year :
- 2009
-
Abstract
- Although current code guidelines specify different seismic performance objectives for fixed-base and isolated buildings, the future of performance-based design will allow user-selected performance objectives, motivating the need for a consistent performance comparison of the two systems. Based on response history analysis to a suite of motions, constant ductility spectra are generated for fixed-base and isolated buildings. Both superstructure force (base shear) and deformation demands in base-isolated buildings are lower than in fixed-base buildings responding with identical deformation ductility. To compare the relative performance of many systems or to predict the best system to achieve a given performance objective, a response index is developed and used for rapid prototyping of response as a function of system characteristics. When evaluated for a life safety performance objective, the superstructure design base shear of an isolated building is competitive with that of a fixed-base building with identical ductility, and the isolated building generally has improved response. Isolated buildings can meet a moderate ductility immediate-occupancy objective at low design strengths, whereas comparable ductility fixed-base buildings fail to meet the objective. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 07339445
- Volume :
- 135
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Journal of Structural Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 39786245
- Full Text :
- https://doi.org/10.1061/(ASCE)0733-9445(2009)135:6(698)