Prediction of ultimate state of thin-walled square steel columns under 3-directional seismic accelerations

To ensure the seismic safety of steel bridge piers, it is realistic to check their dynamic responses under the coupling of 3D seismic wave components in terms of whether or not the responses are within the ultimate limit state. For this purpose, an interaction surface expressed in terms of three res...

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Bibliographic Details
Published inJournal of Structural Engineering, A Vol. 58A; pp. 399 - 412
Main Authors Goto, Yoshiaki, Ebisawa, Takemasa
Format Journal Article
LanguageJapanese
Published Japan Society of Civil Engineers 2012
Subjects
3D seismic wave
restoring force
seismic design
steel column
ultimate state
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Summary:To ensure the seismic safety of steel bridge piers, it is realistic to check their dynamic responses under the coupling of 3D seismic wave components in terms of whether or not the responses are within the ultimate limit state. For this purpose, an interaction surface expressed in terms of three restoring force components and two restoring moment components around the two horizontal axes is proposed to express the ultimate limit state of steel bridge piers with stiffened square cross section. This interaction curve is versatile because it includes all the possible restoring force components that will act at the top of the bridge piers without eccentricity. The accuracy of the proposed interaction surface is confirmed by carrying out a dynamic response analysis under 3D seismic wave components.
ISSN:1881-820X
DOI:10.11532/structcivil.58A.399