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Factored Modal Combination for Evaluation of Earthquake Load Profiles

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Authors
Park, Hong-Gun; Eom, Taesung; Lee, Hyerin
Issue Date
2007-07
Publisher
American Society of Civil Engineers (ASCE)
Citation
J. Struct. Engrg. 133(7), 956-968
Keywords
Earthquake loadsDynamics responseSeismic analysisModal analysisElasticity
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
URI
http://hdl.handle.net/10371/7295
DOI
https://doi.org/10.1061/(ASCE)0733-9445(2007)133:7(956)
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Architecture and Architectural Engineering (건축학과)Journal Papers (저널논문_건축학과)
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