Steel-concrete composite structures are widely used in modern construction, resulting in highly efficient and robust systems. However, the long-term performance of these structures is significantly affected by concrete creep. This study investigates the long-term effects of concrete creep on the performance of a roof system composed of steel, steel-concrete composite and Reinforced Concrete (RC) elements, in accordance with the Italian Building Code. Using a Finite Element (FE) analysis of the roof, the forces and stresses in the structural members and the displacements of the roof structure are evaluated for the short and long-term conditions. The results show that concrete creep leads to a significant increase in the downward vertical displacement and in the deflection of the composite steel-concrete beams. The study also examines the redistribution of forces due to creep between the structural elements and the corresponding changes in concrete and steel stresses. The results highlight the importance of considering concrete creep in the design and analysis of composite steel-concrete systems to ensure structural safety and serviceability.
Creep Effects on an Existing Composite Steel-Concrete Structure
Frappa G.;Pauletta M.
2025-01-01
Abstract
Steel-concrete composite structures are widely used in modern construction, resulting in highly efficient and robust systems. However, the long-term performance of these structures is significantly affected by concrete creep. This study investigates the long-term effects of concrete creep on the performance of a roof system composed of steel, steel-concrete composite and Reinforced Concrete (RC) elements, in accordance with the Italian Building Code. Using a Finite Element (FE) analysis of the roof, the forces and stresses in the structural members and the displacements of the roof structure are evaluated for the short and long-term conditions. The results show that concrete creep leads to a significant increase in the downward vertical displacement and in the deflection of the composite steel-concrete beams. The study also examines the redistribution of forces due to creep between the structural elements and the corresponding changes in concrete and steel stresses. The results highlight the importance of considering concrete creep in the design and analysis of composite steel-concrete systems to ensure structural safety and serviceability.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
