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Factored Modal Combination for Evaluation of Earthquake Load Profiles
Cited 15 time in
Web of Science
Cited 24 time in Scopus
- Authors
- Issue Date
- 2007-07
- Citation
- J. Struct. Engrg. 133(7), 956-968
- Keywords
- Earthquake loads ; Dynamics response ; Seismic analysis ; Modal analysis ; Elasticity
- Abstract
- To accurately predict the inelastic earthquake response of a structure by pushover analysis, the prescribed load profiles should
be consistent with the actual force profiles which develop maximum design values during the time-history response of the structure. In the
present study, a new modal combination method, factored modal combination FMC , was developed to predict the earthquake load
profiles of building structures affected by higher dynamic modes. In the FMC, multiple story load profiles are predicted by combining the
modal spectrum responses multiplied by the modal combination factors. Based on the results of parametric studies on moment-resisting
frames and walls, the modal combination factors were defined according to the hierarchy of each mode affecting the dynamic responses
of structures. The FMC was applied to prototype buildings with and without vertical irregularity. The results showed that the FMC
predicted the actual story load profiles which developed during the elastic and inelastic time-history responses of the structures.
- ISSN
- 0733-9445
- Language
- English
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