Shen, Wen-ChengWen-ChengShenSHYH-JIANN HWANG2025-11-272025-11-272025978981969916223662557https://www.scopus.com/record/display.uri?eid=2-s2.0-105020265487&origin=resultslisthttps://scholars.lib.ntu.edu.tw/handle/123456789/734168Columns serve as pivotal structural elements in frame buildings, responsible for supporting vertical loads and resisting lateral forces. In the context of high-rise buildings, lower-story columns face substantial demands for deformation capacity under seismic loading conditions. Consequently, the ACI 318–14 building code requires the confinement of all longitudinal bars in columns using seismic hooks, especially in scenarios involving high-strength concrete (HSC) or high axial loads. However, the requirement for crossties with seismic hooks at both ends may significantly impact the assembly of column reinforcement cages during field installation. To address this concern, this research proposes an experimental investigation involving full-scale column specimens with a cross-sectional dimension of 600 × 600 mm fabricated using high-strength and normal-strength materials, respectively. These specimens are subjected to quasi-static cyclic loading under a constant high axial load. The experimental findings indicate that alternating the crossties with a 90-degree hook at one end sustains satisfactory seismic performance of the column specimens. This adjustment in detailing shows potential for simplifying the field installation of reinforcement cages for columns employing HSC or experiencing high axial loads.falseconfinement reinforcementhigh axial loadlateral drift capacityreinforced concrete columnultimate driftconference paper10.1007/978-981-96-9917-9_412-s2.0-105020265487