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Load Distribution Patterns for Displacement-based Seismic Design of RC Framed Buildings
Published in Springer India
2014
Volume: 95
   
Issue: 4
Pages: 211 - 219
Abstract
The behaviour of tall frames is characterized by the influence of higher modes in addition to the fundamental mode and thus the design procedures for Displacement-based Design (DBD) adopt several measures to control higher mode effects. The performances of 4, 9 and 15-storeyed frames, designed by DBD were verified using non-linear time history analyses. Higher values of inter-storey drift and damage index were seen near the top of tall frames, which shows the inefficiency of the design method in accounting for higher mode effect. As the principle of damage-limiting aseismic design is to get uniform damage along the height of the frame, several load distribution patterns were examined and the storey shear distributions were compared to identify the best pattern to get uniform damage. The Chao load distribution was found to give higher storey shear at top and thus the frames were redesigned using this load distribution. The efficiency of Chao load distribution in reducing higher mode effects is demonstrated using non-linear time history analyses. © 2014, The Institution of Engineers (India).
About the journal
JournalData powered by TypesetJournal of The Institution of Engineers (India): Series A
PublisherData powered by TypesetSpringer India
ISSN22502149
Open AccessNo
Concepts (14)
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    Damage detection
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    Ductility
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    Electric power plant loads
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    Shear flow
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    Structural analysis
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    Damage index
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    DISPLACEMENT-BASED DESIGNS
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    Displacement-based seismic design
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    Fundamental modes
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    HIGHER-MODE EFFECTS
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    Load distributions
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    SHEAR DISTRIBUTIONS
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    TIME HISTORY ANALYSIS
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    Seismic design