Seismic Collapse Performance of a Full-Scale Concrete Building with Lightly Reinforced Columns
Publication: Journal of Structural Engineering
Volume 147, Issue 12
Abstract
Brittle failure of lightly reinforced concrete columns is one of the primary reasons for partial or total collapse of substandard existing buildings subjected to earthquake loading. This study presents collapse performance of a full-scale building that was performed to gain insight into the seismic behavior and the collapse mechanisms of nonductile buildings with lightly reinforced concrete columns. The three-story building was tested under displacement-controlled quasi-static reversed cyclic loading followed by a lateral pushover loading up to realization of the total collapse. In addition to the poor reinforcement details, columns had high axial load–to–axial capacity ratios as also observed in many existing substandard buildings. During the test, severe structural damage was observed at 0.9% first-story drift ratio in the cyclic part of the lateral loading and the brittle total collapse of the building took place during the pushover loading at 1.45% first-story drift ratio. In this paper, after the introduction of the test campaign, the formation of structural damage and collapse mechanisms are discussed. In addition, an attempt to predict the behavior and performance of the test building is made by using a column model that considers flexural, slip, and shear deformations. Finally, the obtained analytical results are compared with the experimental observations and results.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
Authors acknowledge the financial support of DowAksa Advanced Composites Turkey. Additionally, in-kind supports provided by Istanbul Technical University (ITU), Bogazici University, Balikesir University, Governorship of Yalova and Disaster and Emergency Management Presidency (AFAD) are also acknowledged. The contributions of Ilgaz Doğan (DowAksa); Çağlar Göksu Akkaya, Ph.D. (ITU); Pınar İnci, Ph.D. (ITU); Ergün Binbir (Ph.D. candidate, ITU); Ali Osman Ateş (Ph.D. candidate, ITU); Ali Naki Şanver, M.Sc. (RISE Engineering); Çağlar Üstün, M.Sc. (ITU); Gökhan Sarı, B.Sc. (Balikesir University); Emin Amini, B.Sc. (Balikesir University); Tamer Şahna, B.Sc. (Balikesir University); Oğuzhan Sözer, B.Sc. (Balikesir University); Berkay Aldırmaz (M.Sc. candidate, ITU); Ömer Faruk Halıcı (Ph.D. candidate, ITU); and Mehmet Aksa (M.Sc. candidate, Politecnico de Milano) are also gratefully acknowledged.
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Published In
Journal of Structural Engineering
Volume 147 • Issue 12 • December 2021
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© 2021 American Society of Civil Engineers.
History
Received: Dec 9, 2020
Accepted: Jul 16, 2021
Published online: Sep 24, 2021
Published in print: Dec 1, 2021
Discussion open until: Feb 24, 2022
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