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Volume 14
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Article

Influence of Compressive Strength and Steel-Tube Thickness on Axial Compression Performance of Ultra-High-Performance Concrete-Filled Stainless-Steel Tube Columns Containing Coarse Aggregates

by
Wenrui Li
1,
Mengqi Zhu
2,
Guo Li
1,
Yang Hu
1,
Bei Wang
1,
Yongfei Cao
1,
Wenting He
3,
Haiyang Li
4,
Zhaopeng Tang
4 and
Yingda Zhang
4,*
1
The First Construction Engineering Limited Company of China Construction Third Engineering Bureau (Sichuan Branch), Chengdu 641400, China
2
Dongfang Boiler Co., Ltd., Chengdu 611731, China
3
Centre for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
4
School of Architecture and Civil Engineering, Xihua University, Chengdu 610039, China
*
Author to whom correspondence should be addressed.
Buildings 2024, 14(11), 3605; https://doi.org/10.3390/buildings14113605
Submission received: 14 October 2024 / Revised: 5 November 2024 / Accepted: 9 November 2024 / Published: 13 November 2024
(This article belongs to the Special Issue Research on Rate-Dependent Mechanical Properties of Ultra-High Strength Concrete)
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Abstract

With the increasing use of concrete-filled steel tubular (CFST) structures, exposed steel tubes are highly susceptible to corrosion, posing potential safety hazards. This study innovatively proposes the use of stainless-steel tubes instead of traditional carbon-steel ones and introduces coarse aggregates into ultra-high-performance concrete (UHPC), forming a coarse aggregate-incorporated ultra-high-performance concrete-filled stainless-steel tube (CA-UFSST). The inclusion of coarse aggregates not only compensates for the shortcomings of UHPC but also enhances the overall mechanical performance of the composite structure. Twenty sets of specimens were designed to analyze the influence of four parameters, including the coarse aggregate content, compressive strength, stainless-steel-tube thickness, and stainless-steel type on the axial compression performance of UHPC. The experimental results indicate that the failure mode of UHPC is related to the confinement ratio. As the confinement ratio increases, the failure mode transitions from shear failure to bulging failure. The addition of coarse aggregates enhances the stiffness of the specimens. Furthermore, this paper discusses the applicability of six current codes in predicting the bearing capacity of CA-UFSST and finds that the European code exhibits the best prediction performance. However, as the confinement ratio increases, the prediction accuracy becomes notably insufficient. Therefore, it is necessary to establish a more accurate calculation model for the axial compression bearing capacity.
Keywords: concrete stainless-steel tube; CA-UFSST; confinement coefficient; analytical model; bearing capacity concrete stainless-steel tube; CA-UFSST; confinement coefficient; analytical model; bearing capacity

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MDPI and ACS Style

Li, W.; Zhu, M.; Li, G.; Hu, Y.; Wang, B.; Cao, Y.; He, W.; Li, H.; Tang, Z.; Zhang, Y. Influence of Compressive Strength and Steel-Tube Thickness on Axial Compression Performance of Ultra-High-Performance Concrete-Filled Stainless-Steel Tube Columns Containing Coarse Aggregates. Buildings 2024, 14, 3605. https://doi.org/10.3390/buildings14113605

AMA Style

Li W, Zhu M, Li G, Hu Y, Wang B, Cao Y, He W, Li H, Tang Z, Zhang Y. Influence of Compressive Strength and Steel-Tube Thickness on Axial Compression Performance of Ultra-High-Performance Concrete-Filled Stainless-Steel Tube Columns Containing Coarse Aggregates. Buildings. 2024; 14(11):3605. https://doi.org/10.3390/buildings14113605

Chicago/Turabian Style

Li, Wenrui, Mengqi Zhu, Guo Li, Yang Hu, Bei Wang, Yongfei Cao, Wenting He, Haiyang Li, Zhaopeng Tang, and Yingda Zhang. 2024. "Influence of Compressive Strength and Steel-Tube Thickness on Axial Compression Performance of Ultra-High-Performance Concrete-Filled Stainless-Steel Tube Columns Containing Coarse Aggregates" Buildings 14, no. 11: 3605. https://doi.org/10.3390/buildings14113605

APA Style

Li, W., Zhu, M., Li, G., Hu, Y., Wang, B., Cao, Y., He, W., Li, H., Tang, Z., & Zhang, Y. (2024). Influence of Compressive Strength and Steel-Tube Thickness on Axial Compression Performance of Ultra-High-Performance Concrete-Filled Stainless-Steel Tube Columns Containing Coarse Aggregates. Buildings, 14(11), 3605. https://doi.org/10.3390/buildings14113605

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