Experimental study on the seismic behavior of RC columns improved with central large-diameter butted steel rods

Hanming  Zhang; Jie Luo; Jianchun Xiao; Jing  Chen; Zhuoqun Liu; Yi  Zhang; Zongli  Luo; Hong  Zhang

doi:10.1590/1679-78257290

Experimental study on the seismic behavior of RC columns improved with central large-diameter butted steel rods

Authors

Hanming Zhang Research Center of Space Structures, Guizhou University, Guiyang 550025, China https://orcid.org/0000-0001-7036-2806
Jie Luo No.6 company of China Construction Fourth Engineering Bureau, Hefei 230011, China https://orcid.org/0000-0001-8486-8402
Jianchun Xiao Research Center of Space Structures, Guizhou University, Guiyang 550025, China https://orcid.org/0000-0003-2971-6144
Jing Chen Research Center of Space Structures, Guizhou University, Guiyang 550025, China https://orcid.org/0000-0002-1969-6437
Zhuoqun Liu Research Center of Space Structures, Guizhou University, Guiyang 550025, China https://orcid.org/0000-0002-2863-1862
Yi Zhang No.6 company of China Construction Fourth Engineering Bureau, Hefei 230011, China https://orcid.org/0000-0002-4981-4019
Zongli Luo No.6 company of China Construction Fourth Engineering Bureau, Hefei 230011, China https://orcid.org/0000-0001-6683-4460
Hong Zhang Bureau of Housing and Urban-Rural Development of Wudang District, Guiyang 550018, China https://orcid.org/0000-0002-0346-3321

DOI:

https://doi.org/10.1590/1679-78257290

Abstract

A reinforced concrete (RC) column improved with central large-diameter butted steel rods (CLBSR column) has been proposed to increase the limit value of the axial compression ratio. This paper presents the seismic behavior analysis of CLBSR columns subjected to low-cycle reciprocating loading. The CLBSR columns were also compared with the RC column improved with central large-diameter steel rods (CLSR column) and the RC column improved with central reinforcement bars (CRB column) under the same experimental conditions. The typical failure modes, hysteretic curves, skeleton curves, stiffness degradation, and energy dissipation capacity were all investigated. The improved PARK damage model obtained the corresponding relationships between the damage indices and the damage state of each column. The test results indicated that the CLBSR columns and CLSR columns had similar seismic behavior, but were slightly inferior to the CRB columns. Overall, the butt joint of large-diameter steel rods had little effect on the seismic behavior.

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Published

2022-09-20

Issue

Vol. 19 No. 6 (2022)

Section

Articles

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