20.500.12556/DKUM-92072 Transverse compressive behavior of plain and polypropylene fiber-reinforced concrete infilled steel tubes as hybrid steel-concrete nodes for discrete reticulated shell structures This study investigates using concrete infilled steel tubes as hybrid nodes for discrete reticulated shell structures under compressive loading transverse to the tube axis. Three configurations were tested: empty, plain concrete infilled and polypropylene fiber-reinforced concrete infilled steel tubes. Displacement-controlled loading was applied through welded steel plates. Simplified beam theory models and nonlinear finite element analysis were used to evaluate the structural behavior. The concrete infilled steel tube specimens had higher stiffness and load-bearing capacity than the empty ones. The structural behavior of the concrete infilled specimens could be split into pre- and post-split-tensile cracking phases. No significant difference was found between the plain and fiber-reinforced concrete specimens under loads up to 1500 kN, which was the load limit of the testing machine. An additional fiber-reinforced concrete specimen, tested on a higher capacity machine, had a load-bearing capacity of 2400 kN and exhibited ductile failure. concrete infilled steel tube fiber-reinforced concrete compressive loading discrete reticulated shell structure node simplified calculation nonlinear finite element analysis jeklena cev polnjena z betonom armirani beton tlačna obremenitev vozlišče diskretne mrežaste lupinaste strukture poenostavljen izračun nelinearna analiza končnih elementov true false true Elsevier Angleški jezik Slovenski jezik https://www.sciencedirect.com/journal/engineering-structures © 2024 The Author(s) Članek v reviji 2025-03-14 03:15:53 2026-01-19 07:51:46 2026-01-20 03:18:35 0000-00-00 00:00:00 2025 0 0 20 str. pt. B, št. članka 119149 Vol. 322 1 Jan. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-06-05 2024-10-14 2024-10-22 624.012.45:519.6 214332675 10.1016/j.engstruct.2024.119149 1873-7323 1-s2.0-S0141029624017115-main.pdf 1-s2.0-S0141029624017115-main.pdf 1 50BDE805F118A1A2A95C29CD9F01D65D b2ec6ef866678d1adf99c88de68530909470e477a5791fdaa0216cf14f4920a3 900bef87-f503-11f0-94a4-00155d580e02 https://dk.um.si/Dokument.php?lang=slv&id=202136 https://www.sciencedirect.com/science/article/pii/S0141029624017115?via%3Dihub 0 94e86c00-f503-11f0-94a4-00155d580e02 https://dk.um.si/Dokument.php?lang=slv&id=202137 Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo 0 0 0