Abstract
This paper examines the cyclic behaviour of 13 ultra-high performance concrete filled steel tube columns (UHPCFSTs) by using pseudo-static test. The parameters such as the axial compression ratio, the steel tube thickness, the aspect ratio (h/b) and the loading modes (loaded with 10 cycles, 3 cycles and monotonic loading) are taken into account, and the effects of the parameters are discussed. The results have shown that there are three types of failure modes for UHPCFSTs named the flexural failure mode, the compression-flexure failure mode and the welding seam fracture. The damage to the bottom of the columns is more serious compared to other positions. UHPCFSTs exhibit favorable seismic performance, which reflects that the equivalent viscous damping coefficients for UHPCFSTs failure are no less than 0.3, and the drift ratios of elasticity and elastoplasticity are within the scopes of 1.21%–2.18% and 2.36%–4.58%, respectively. The cumulative damage is not serious for specimens loaded with 10 cycles and 3 cycles under the drift ratio of 2%, whilst under the drift ratio of 4%, the specimens loaded with 10 cycles experience more serious damage compared with that loaded with 3 cycles.
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Acknowledgments
The present work was supported by the Key Program of National Natural Science Foundation of China (Grant Nos. 51738011), the Natural Science Foundation of Hubei Province of China (Research on seismic performance of prefabricated joints between UHPC filled high-strength rectangular steel tube column to H-shaped steel beam, 2024) the Natural Science Foundation of Xiaogan City Hubei Province (Grant Nos. XGKJ2022010099), the Plan Project of Hubei Province Construction Science and Technology in 2023 (Grant Nos. 89) and Research Project of Hubei Polytechnic University (Grant Nos. 23xjz03R).
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Yan, Y., Cai, H. & Cheng, T. Pseudo-Static Test Research on Behavior of UHPC-Filled Rectangular Steel Tubular Columns. KSCE J Civ Eng (2024). https://doi.org/10.1007/s12205-024-1845-2
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DOI: https://doi.org/10.1007/s12205-024-1845-2