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Structural performance of construction and demolition waste-based geopolymer concrete columns under combined axial and lateral cyclic loading
Akduman, S. Aktepe, R. Aldemir, A. Ozcelikci, E. Yildirim, Gurkan Sahmaran, M.
Akduman, S.
Aktepe, R.
Aldemir, A.
Ozcelikci, E.
Yildirim, Gurkan
Sahmaran, M.
Publication Date
2023-12-15
End of Embargo
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© 2023 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
Peer-Reviewed
Yes
Open Access status
openAccess
Accepted for publication
2023-09-24
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Abstract
Construction and demolition waste (CDW) has reached severe environmental and economic dimensions due to its
large volume among all solid waste, highlighting the importance of local actions to manage, recycle, and reuse
CDW. Ductile demountable connections are necessary to disassemble and reuse the concrete structural members
and fast assembly of precast structures in seismic regions without generating waste. In this study, the seismic
performance of CDW-based reinforced geopolymer concrete columns has been investigated. Six ½ scaled columns
(half of which were demountable and the other half monolithic) were experimentally tested under reversed
cyclic lateral displacement excursions, considering three different levels of constant axial loading to determine
failure mechanisms, load–displacement responses, ductilities, energy dissipation capacities, stiffness degradation
relations, and curvature distributions. The obtained test results were used to determine the performance of CDWbased geopolymer concrete columns and compare the performances of the demountable connection with the
monolithic connection. The test results showed that the novel demountable connection for precast concrete
frames exhibited better seismic performance in terms of maximum lateral load capacity, initial stiffness, energy
dissipation capacity, and maximum curvature than their monolithic counterparts. Besides, increasing the axial
compression ratio on the columns caused an increase in lateral load capacity, energy dissipation capacity, energy
dissipation ratio, and initial curvature stiffness; however, it decreased the ductility. Finally, the capacity predictions of current codes, i.e., TS500 and ACI318, were conservative when compared with experimental results.
Version
Accepted manuscript
Citation
Akduman S, Aktepe R, Aldemir A et al (2023) Structural performance of construction and demolition waste-based geopolymer concrete columns under combined axial and lateral cyclic loading. Engineering Structures. 297(15 Dec): 116973.
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Article