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Based on the capability design principle and design concept of earthquake-resilient structure, this paper proposes a box-section high pier composed of four-limb concrete-filled steel tubular (CFST) columns and low yield point (LYP) steel plates as replaceable components, thus improving the seismic performance of a bridge comprising conventional RC tall piers. A set of 1/ 10 scale specimens were designed and manufactured. Then, to investigate the effects of the eccentricity ratio of load and the thickness of the LYP steel plate on the compression performance of the proposed composite tall pier, axial and eccentric compression tests were conducted. The test results demonstrated that under axial compression, the four-limb CFST columns worked collaboratively well. In particular, the compression became increasingly larger until the specimen was broken and the test was terminated, after which the four-limb tube-LYP steel plates yielded, and the confinement of steel tube ferrule to the concrete core took full effect. Furthermore, the specimen exhibited compression-bending failure. When the loading eccentricity ratio was less than 0. 405, the four-limb CFST columns were in full section compression. The longitudinal strains of the composite section basically met the 'assumption of plane-section' and 'assumption of quasi-plane-section' at the elastic and elastic-plastic stages, respectively. The specimens also exhibited global press-bending failure as the tests were terminated. Furthermore, the stresses of steel beams were small and only played a role in tectonism. Finally, increasing the thickness of LYP steel plates enhanced the bending stiffness and compressive bearing capacity while reducing the lateral deflection. Therefore, the effects of the 'bearing components' should be considered in the computation of the compressive capacity. © 2024 Editorial Board of Journal of Harbin Engineering. All rights reserved.
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Journal of Harbin Engineering University
ISSN: 1006-7043
CN: 23-1390/U
Year: 2024
Issue: 3
Volume: 45
Page: 561-571
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 7
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