Axial shortening of steel columns in buildings subjected to earthquakes
Item
Title (Dublin Core)
en-US
Axial shortening of steel columns in buildings subjected to earthquakes
Description (Dublin Core)
en-US
Steel members subject to axial compression and inelastic cyclic displacements, such as may occur during earthquake excitation, exhibit axial shortening due to material inelastic deformation irrespective of the occurrence of buckling. This column axial shortening can cause undesirable effects in the building, especially if it occurs to a different extent in different columns of a seismic-resisting system. This paper summarizes experimental and finite element studies to quantify the axial shortening of columns with known axial forces pushed to inelastic cyclic displacements. A flexural hinge model for a frame analysis program is developed and calibrated against that from experimental and analytical studies. Then, to quantify the effect of axial shortening on realistic moment and eccentrically-braced frames during earthquakes, inelastic dynamic time history analyses were conducted. While axial shortening of more than 7% of the column length was obtained during experimental testing, the axial shortening was always less than 1% of the column interstorey height in the steel frames studied. A method to estimate the axial shortening as a function of the expected inelasticity is developed. Finally, several new details are described in order to prevent detrimental effects due to axial shortening.
Creator (Dublin Core)
MacRae, Gregory A.
Urmson, Christopher R.
Walpole, Warren R.
Moss, Peter
Hyde, Karissa
Clifton, Charles
Publisher (Dublin Core)
en-US
New Zealand Society for Earthquake Engineering
Date (Dublin Core)
2009-12-31
Type (Dublin Core)
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
en-US
Article
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://bulletin.nzsee.org.nz/index.php/bnzsee/article/view/291
10.5459/bnzsee.42.4.275-287
Source (Dublin Core)
en-US
Bulletin of the New Zealand Society for Earthquake Engineering; Vol 42 No 4 (2009); 275-287
2324-1543
1174-9857
Language (Dublin Core)
eng
Relation (Dublin Core)
https://bulletin.nzsee.org.nz/index.php/bnzsee/article/view/291/277
Rights (Dublin Core)
en-US
Copyright (c) 2009 Gregory A. MacRae, Christopher R. Urmson, Warren R. Walpole, Peter Moss, Karissa Hyde, Charles Clifton
en-US
https://creativecommons.org/licenses/by/4.0
