Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Simplified Numerical Model Development of Lightweight‐concrete Encased Cold‐formed Steel Column‐end Joints and Panels
With the increasing demand for using cost‐effective structures in the construction field, more and more novel structural systems have been developed. One of these new efficient systems is cold‐formed steel (CFS) members encased in polystyrene aggregate concrete (PAC). In this study, a simplified numerical model has been proposed, using ANSYS software, for PAC‐encased CFS column‐end joints and panels under compression. Each model has been validated with previous experimental results from the literature, where both ultimate axial load and failure mode were compared with tests. The main idea in this numerical model was to substitute the bracing effect of concrete on buckling with springs. A detailed imperfection sensitivity study was performed for column‐end connections to determine the effect of imperfection values on both ultimate capacities and failure modes. The necessary equivalent geometric imperfection amplitude was determined for each case of the available tests. Finally, an equivalent geometric imperfection amplitude was proposed for column‐end joints and panels to predict the design capacity according to the test failure mode.
Simplified Numerical Model Development of Lightweight‐concrete Encased Cold‐formed Steel Column‐end Joints and Panels
With the increasing demand for using cost‐effective structures in the construction field, more and more novel structural systems have been developed. One of these new efficient systems is cold‐formed steel (CFS) members encased in polystyrene aggregate concrete (PAC). In this study, a simplified numerical model has been proposed, using ANSYS software, for PAC‐encased CFS column‐end joints and panels under compression. Each model has been validated with previous experimental results from the literature, where both ultimate axial load and failure mode were compared with tests. The main idea in this numerical model was to substitute the bracing effect of concrete on buckling with springs. A detailed imperfection sensitivity study was performed for column‐end connections to determine the effect of imperfection values on both ultimate capacities and failure modes. The necessary equivalent geometric imperfection amplitude was determined for each case of the available tests. Finally, an equivalent geometric imperfection amplitude was proposed for column‐end joints and panels to predict the design capacity according to the test failure mode.
Simplified Numerical Model Development of Lightweight‐concrete Encased Cold‐formed Steel Column‐end Joints and Panels
Eid, Nathalie (Autor:in) / Joó, Attila László (Autor:in)
ce/papers ; 5 ; 170-177
01.09.2022
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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