City Research Online

Abstract

To investigate the seismic performance of Steel fiber‐reinforced coal gangue concrete (SFCGC) joints, six specimens of SFCGC joints were tested to investigate the effects of coal gangue replacement rate (CGRR) and steel fiber volume content (SFVC) on the failure modes of the SFCGC joints, the hysteresis curves, the displacement ductility, the shear deformation, the energy consumption, stiffness degradation, and bearing capacity. The study analyzed the cracking and failure trends of the specimens by comparing the results obtained through the digital image correlation (DIC) technique with conventional observations. The test results show that the failure mode of SFCGC joints is similar to that of steel fiber‐reinforced normal concrete (SFNC) joints. Under the same CGRR, the addition of steel fibers effectively inhibited the development of cracks in the joints, and the crack load and ultimate load increased by up to 45.4% and 47.4%, respectively. Finally, a computational model is proposed to determine the shear capacity of SFCGC joints, which was able to predict the bearing capacity of SFCGC joints adequately.

Publication Type:	Article
Additional Information:	© 2025 International Federation for Structural Concrete. This is the peer reviewed version of the following article: Cai B, Zhou R, Wang L, Fu F. Seismic performance of steel fiber reinforced coal gangue concrete beam-column joints. Structural Concrete. 2025. https://doi.org/10.1002/suco.70217, which has been published in final form at https://doi.org/10.1002/suco.70217. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
Publisher Keywords:	beam-column joints, coal gangue, seismic performance, steel fiber
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Departments:	School of Science & Technology School of Science & Technology > Department of Engineering
SWORD Depositor:	Symplectic Administrator

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