PSI - Issue 78

Agnese Natali et al. / Procedia Structural Integrity 78 (2026) 2015–2021

2021

In summary, while the Concrete Infill configuration provides substantial gains over Bare Steel in terms of punching resistance and joint confinement, the Composite configuration introduces further strength and stiffness benefits — at the cost of more demanding slab behaviour and cracking control. 5. Conclusions The experimental and numerical investigation of the composite CHS-to-I joint with passing-through plates under monotonic horizontal loading show a notable improvement in strength and stiffness compared to bare or infill-only solutions, extending the use of such solutions when there is higher demand in terms of the former. The new design and more precise realization of the welds, assuring full penetration of the welding material, allow this resistance increase and delay crack formation on the same welds. On the other hand, damage in the slab is observed, both in the tense and compressed sides, which is unavoidable in this composite solution. Further studies are ongoing to better enhance the performance of the solution in seismic conditions, detaching the slab from the column, and driving seismic dissipation at the beam ends through localized section reduction. References Kanyilmaz, A., 2019. The problematic nature of steel hollow section joint fabrication, and a remedy using laser cutting technology: A review of research, applications, opportunities. Engineering Structures 183, 1027 – 1048. Alostaz, Y. M. and Schneider, S. P., 1996. Analytical behavior of connections to concrete-filled steel tubes. Journal of Constructional Steel Research 40, 95 – 127. Schneider, S. P. and Alostaz, Y. M., 1998. Experimental Behavior of Connections to Concrete-filled Steel Tubes. Journal of Constructional Steel Research 45, 321 – 352. Bagheri Sabbagh, A., Chan, T. M., Mottram, J. T., 2013. Detailing of I-beam-to-CHS column joints with external diaphragm plates for seismic actions. Journal of Constructional Steel Research 88, 21 – 33. Caprili, S., Mattei, F., Salvatore, W., 2024. Seismic performance of steel braced frames equipped with dissipative replaceable components. Journal of Building Engineering 95. Caprili, S., Mattei, F., Salvatore, W., Ascanio, C., Luvarà, G., 2021. Industrial and techno-economic feasibility of concrete structures reinforced with DP rebars. Construction and Building Materials. Caprili, S., Mattei, F., Salvatore, W., 2022. Structural and economical performance of reinforced concrete frames with Dual-Phase and TempCore® steel rebars in uncorroded and corroded conditions. Structural ConcreteOpen source preview, 2022, 23(1), pp. 67 – 80. Kanyilmaz, A. and Castiglioni, C. A., 2018. Fabrication of laser cut I-beam-to-CHS-column steel joints with minimized welding. Journal of Constructional Steel Research 146, 16 – 32. Couchaux, M., Vyhlas, V., Kanyilmaz, A., Hjiaj, M., 2021. Passing-through I-beam-to-CHS column joints made by laser cutting technology: Experimental tests and design model. Journal of Constructional Steel Research 176. Piscini, A., Morelli, F., Salvatore, W., 2021. Experimental behavior of laser cut I-beam-to-CHS-column steel-concrete composite joints under vertical loads. Journal of Constructional Steel Research 181. Piscini, A., Hoffmeister, B., Salvatore, W., 2020. Passing-through tubular column joints for steel and composite constructions made by laser cutting technology. RWTH Aachen University, Aachen. EU-RFCS Project LASTEICON (2025) https://www.lasteicon.eu/. Safaeifaegh, S., Zanon, G., Bursi, O. S., 2025. Fracture mechanism and performance analysis of CHS welded connections with through plates. Engineering Failure Analysis 169. Menghini, A., Kanyilmaz, A., Calado, L., Castiglioni, C. A., (2023). Experimental Assessment of the Behavior of Tubular Truss Girder Joints Fabricated with Laser Cutting Technology. Journal of Structural Engineering. Das, R., Kanyilmaz, A., Zoromba, E., Menghini, A., Degée, H., 2024. A cradle-to-site life cycle analysis of laser-cut passing-through tubular joints under different seismic conditions. Structures. Fabbri, F., Mattoccia, D., Natali, A., Morelli, F., 2025. Seismic performance of CHS-to-I-beam composite joints with passing-through plates: experimental and numerical approach. COMPDYN 2025, 10th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Rhodes Island, Greece, 15-18 June 2025.