Seismic Performance Assessment of L-Shaped Reinforced Concrete Columns
This paper presents an experimental investigation carried out on 10 reinforced concrete (RC) columns with L-shaped sections subjected to simulated seismic loadings. The primary objective of the study was to assess the suitability of using L-shaped RC columns in regions of low-to-moderate seismic...
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Main Authors: | , |
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Format: | Article |
Language: | English |
Published: |
2015
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Subjects: | |
Online Access: | https://hdl.handle.net/10356/81029 http://hdl.handle.net/10220/39007 https://www.concrete.org/publications/internationalconcreteabstractsportal.aspx?m=details&ID=51688053 |
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Institution: | Nanyang Technological University |
Language: | English |
Summary: | This paper presents an experimental investigation carried out
on 10 reinforced concrete (RC) columns with L-shaped sections
subjected to simulated seismic loadings. The primary objective
of the study was to assess the suitability of using L-shaped RC
columns in regions of low-to-moderate seismic risk. The variables
of interest included the axial load, loading direction, and aspect
ratio. The specimen performances were analyzed and discussed in
terms of crack patterns, hysteretic response, curvature distribution,
displacement decomposition, strain profile, and energy dissipation
capacity. Results highlighted that the L-shaped columns possessed
good seismic resistance, that failure mechanism of L-shaped
columns was mainly governed by vertical splitting cracks, and that
shear strength of L-shaped columns was not significantly affected
by the level of applied axial force and the direction of horizontal
force while initial stiffness was considerably affected by aspect
ratio. Further analysis showed that ignoring the contribution
of flanges, the shear equation (special provisions for walls) in
ACI 318-11 yields good estimations of shear strength for the cases
of L-shaped columns. |
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