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Article

Seismic Performance of Recycled Aggregate Concrete-Filled Steel Tube Column–Composite Beam Frames with Column-End Stirrup Confinement

1
School of Civil Engineering, Central South University, Changsha 410075, China
2
China Construction Fourth Engineering Division Co., Ltd., Guangzhou 510630, China
3
China Construction Third Engineering Bureau Co., Ltd., Wuhan 430064, China
4
National Engineering Research Center of High Speed Railway Construction Technology, Changsha 410075, China
*
Author to whom correspondence should be addressed.
Materials 2025, 18(11), 2458; https://doi.org/10.3390/ma18112458
Submission received: 23 April 2025 / Revised: 22 May 2025 / Accepted: 22 May 2025 / Published: 23 May 2025
(This article belongs to the Special Issue Advances in Modern Cement-Based Materials for Composite Structures)

Abstract

The application of recycled concrete in building structures can not only effectively reduce the generation of construction waste and reduce the excessive dependence on natural aggregates but can also promote the sustainable use of resources and meet the national “double carbon” strategic requirements. This study investigates the effect of the recycled aggregate replacement ratio on the seismic performance of concrete-filled steel tube column–composite beam frames. Five finite element models were developed, considering varying recycled aggregate replacement ratios and the presence or absence of column-end stirrup-confined reinforcement. Dynamic response analyses were conducted. The results reveal that replacing natural aggregates with recycled aggregates reduces the stiffness of concrete-filled steel tube columns by weakening the core concrete, negatively impacting seismic performance and increasing structural stiffness damage. Column-end stirrup-confined reinforcement reduces interface slip between the core concrete and the steel tube by directly restraining the core concrete, thereby enhancing the bending stiffness of the concrete-filled steel tube column and improving the seismic performance of the structure. The seismic performance of recycled concrete frames with column-end stirrup-confined reinforcement is superior to that of conventional concrete frames, demonstrating that column-end reinforcement can effectively mitigate the adverse effects of recycled aggregate replacement on the structure’s seismic performance.
Keywords: recycled aggregate concrete; seismic performance; concrete-filled steel tube (CFST) structures; column-end stirrup confinement recycled aggregate concrete; seismic performance; concrete-filled steel tube (CFST) structures; column-end stirrup confinement

Share and Cite

MDPI and ACS Style

Yang, Z.; Chen, X.; Xu, H.; Hui, B.; Huang, J.; Wang, L.; Sadat, S.I.; Ding, F. Seismic Performance of Recycled Aggregate Concrete-Filled Steel Tube Column–Composite Beam Frames with Column-End Stirrup Confinement. Materials 2025, 18, 2458. https://doi.org/10.3390/ma18112458

AMA Style

Yang Z, Chen X, Xu H, Hui B, Huang J, Wang L, Sadat SI, Ding F. Seismic Performance of Recycled Aggregate Concrete-Filled Steel Tube Column–Composite Beam Frames with Column-End Stirrup Confinement. Materials. 2025; 18(11):2458. https://doi.org/10.3390/ma18112458

Chicago/Turabian Style

Yang, Zhi, Xingnian Chen, Hongchang Xu, Baoye Hui, Jia Huang, Liping Wang, Said Ikram Sadat, and Faxing Ding. 2025. "Seismic Performance of Recycled Aggregate Concrete-Filled Steel Tube Column–Composite Beam Frames with Column-End Stirrup Confinement" Materials 18, no. 11: 2458. https://doi.org/10.3390/ma18112458

APA Style

Yang, Z., Chen, X., Xu, H., Hui, B., Huang, J., Wang, L., Sadat, S. I., & Ding, F. (2025). Seismic Performance of Recycled Aggregate Concrete-Filled Steel Tube Column–Composite Beam Frames with Column-End Stirrup Confinement. Materials, 18(11), 2458. https://doi.org/10.3390/ma18112458

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