Abstract
To enhance the structural connectivity of prefabricated steel frame systems and augment their construction efficiency, this study introduces an innovative prefabricated joint design tailored for square steel columns and H-beams characterized by varying beam heights. This study includes both static loading tests and seismic tests performed on full-scale joints featuring two different beam heights. This investigation involved a comprehensive analysis of the static and seismic performance of the joints, employing various performance metrics such as ultimate load capacities, ultimate rotation angles, hysteresis curves, skeleton curves, stiffness degradation curves, and ductility coefficients, in alignment with established structural codes and standards. The results indicate that the plasticity of the H-beam is fully developed, exhibiting a relative slip phenomenon. Additionally, the joints demonstrate commendable rotational capacity, with hysteresis curves consistently manifesting an inverse S-shape and exhibiting noteworthy stiffness degradation. Furthermore, the comparison with the unimproved joint shows that the novel joint, in addition to being easy to construct, has better ductility and energy dissipation capacity. The results of the study will provide a technical reference for further optimization and application of prefabricated beam-column joints.
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Acknowledgements
This work was financially supported by the General Program of Science Foundation of Shandong Province (ZR2023ME215), the National Natural Science Foundation of China (Grant No. 52308161 and Grant No. 51308154) and Technology research project of CSCEC (CSCEC-2020-Z-35).
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All authors contributed to the study conception and design. Z.Z., H.W., L.S. and X.J. compared the novel joint with the traditional joints; Z.Z., D.L. and H.Q. carried out the static tests; H.W., Y.B. and G.W carried out the seismic tests; Z.Z., D.L. and H.W. conducted a theoretical analysis; H.W. and F.F. supervised the entire project; Z.Z., L.S. and D.L. wrote the paper with inputs from all authors.
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Zhang, Z., Li, D., Wang, H. et al. Static and Seismic Experimental Study of Novel Prefabricated Beam-Column Joints with Elongated-Hole Brackets. Int J Steel Struct 24, 118–131 (2024). https://doi.org/10.1007/s13296-023-00804-5
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DOI: https://doi.org/10.1007/s13296-023-00804-5