AccScience Publishing / NSCE / Online First / DOI: 10.36922/NSCE026300032
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RESEARCH ARTICLE

Nonlinear pushover analysis of short-column effects induced by different clerestory opening positions in reinforced concrete frames

Mo Shi1* ,  Xinyue Cu1 ,  Yeol Choi2
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1 School of Economics and Management, Ankang University, Ankang , China
2 School of Architecture, Kyungpook National University, Daegu , Republic of Korea
Received: 20 July 2026 | Revised: 22 August 2026 | Accepted: 1 September 2026 | Published online: 18 September 2026
© 2026 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution -Noncommercial 4.0 International License (CC-by the license) ( https://creativecommons.org/licenses/by-nc/4.0/ )
Abstract

The incorporation of clerestory openings in masonry-infilled reinforced concrete (RC) frames is ubiquitous in architectural design for natural ventilation and illumination, but improper design can induce pronounced stiffness irregularities and trigger short column-induced localized damage. This study investigates the sensitivity of the nonlinear seismic performance of masonry-infilled RC frames to the transverse positioning of clerestory openings. Utilizing displacement-controlled nonlinear pushover analysis, four different clerestory opening designs of a one-bay RC frame are evaluated. Plastic-hinge mechanics are defined using the acceptance criteria specified in Seismic Evaluation and Retrofit of Existing Buildings (41-13) (ASCE/SEI 41-13), while capacity–demand equilibria are quantified using the capacity spectrum procedures of Seismic Evaluation and Retrofit of Concrete Buildings (ATC-40) and Improvement of Nonlinear Static Seismic Analysis Procedures (FEMA 440). The findings in this study establish that isolating the clerestory opening from the bounding vertical elements neutralizes captive-column constraints and mitigates premature global stiffness degradation. Specifically, structural configurations featuring internally offset openings demonstrated a 23.36% enhancement in base shear capacity, a 15.77% amplification in energy dissipation, and a 1.62% extension in peak displacement capacity prior to collapse, relative to column-adjacent designs. Furthermore, kinematic damage confirmed that while all structures exhibited a ductile beam-first yielding mechanism, offsetting the fenestrations delayed the propagation of column plastic hinges to higher lateral drift demands. The excellent computational convergence between the ATC-40 and FEMA 440 performance point evaluations also provides a quantitative mechanical foundation and critical theoretical reference for the structural optimization and seismic design of infilled RC infrastructure.

Keywords
Clerestory opening
Short-column effect
Reinforced concrete frame
Nonlinear pushover analysis
Plastic hinge
Seismic performance
Funding
This work was supported by the 25th Batch High-Level Talent Research Project of Ankang University, “Seismic Response and Collapse Mechanisms of RC Structures via Deep Learning–Finite Element Coupling,” under the Grant 2026AYQDZR27.
Conflict of interest
The authors declare they have no competing interests.
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