Abstract
In this article, the seismic performance of PVA fibers and HTRB630 steel bars reinforced with high-strength concrete column specimens (FTRHCs) are investigated numerically. Based on the available experimental data, the fiber model is established considering the bond-slip effect and shear deformation of reinforcements. The numerical simulation and test seismic performance indexes of FTRHCs are compared and analyzed. On this basis, the effect of axial load ratio and shear-to-span ratio on the seismic performance indexes of FTRHCs is further investigated. The results indicate that the hysteresis curves and skeleton curves obtained from the numerical simulation are relatively similar to the test results. The simulated seismic performance indexes are not much different from the test results with a relative error below 15%. As the axial load ratio increases, the bearing capacity and cumulative energy-dissipation of the specimen increase, the displacement ductility decreases, and the stiffness degradation improves little. As the shear-to-span ratio increases, the bearing capacity decreases, the displacement ductility increases, the cumulative energy-dissipation capacity increases, and the stiffness degradation changes little. The seismic performance of FTRHCs improves insignificantly as the PVA fiber volume content increases. It is recommended to use PVA fibers with a volume content of 0.5% in the plastic hinge zone of FTRHCs. The established fiber models are of great practical significance for the application of high-strength concrete members reinforced with fibers and high-strength steel bars in building structures.
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Funding
This research has been supported by the Natural Science Research Project of Jiangsu Province Colleges and Universities (21KJD560002 and 23KJA560007), China; Research and Innovation Team Project of Suqian College (2021TD04), China; Suqian Sci & Tech Program (H202313), China; Jiangsu Civil Architecture Society project ((2023) No. 4 Item 9), China; the Youth Fund Project of Suqian College (2023XQNA03), China; and the Fifth Provincial Research Funding Project of “333 High-level Talent Training” in 2020 (BRA2020241), China.
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Zhuang, ML., Sun, C., Chen, J. et al. Numerical simulation investigation on the seismic performance of high-strength concrete columns reinforced with PVA fibers and HTRB630 steel bars. Bull Earthquake Eng (2024). https://doi.org/10.1007/s10518-024-01915-y
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DOI: https://doi.org/10.1007/s10518-024-01915-y