Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Modelling Hybrid Steel-Shape Memory Alloy Reinforced Shear Walls Repaired with Engineered Cementitious Composites
The ability to mitigate residual displacements and permanent damage, indicators of infrastructure seismic resiliency and serviceability, should be considered in assessing seismic performance. Research has intensified on the implementation of materials such as Shape Memory Alloys (SMAs) and Engineered Cementitious Composites (ECCs) due to their preferred mechanical properties to improve seismic resilience. The superelastic properties demonstrated by SMAs and the enhanced tensile strength and ductility of ECCs compared to normal strength concrete make these materials attractive alternatives for components in the seismic force resisting systems in reinforced concrete structures. Their unique properties, relative novelty, and lack of design guidelines result in uncertainty when designing structural elements that incorporate ECCs or SMAs. This paper investigates influential behavioural mechanisms in the analysis of slender shear walls that incorporate hybrid steel-SMA reinforcing bars and ECC subjected to reverse cyclic loading. The numerical studies are performed using the two-dimensional nonlinear finite element program VecTor2. Amongst the behavioural models found to be influential in the numerical response of shear walls containing SMA bars and ECC are the tension and compression response of the ECC material. The available built-in models for FRC tension were investigated to determine their applicability and accuracy in modelling the response of ECC. Additionally, the influence of local fracture of the reinforcement was investigated. The results indicate that the mechanical properties of ECC may not be accurately captured by current FRC models calibrated using steel fibre specimens and may result in overestimation of stiffness prior to yielding of the structural element.
Modelling Hybrid Steel-Shape Memory Alloy Reinforced Shear Walls Repaired with Engineered Cementitious Composites
The ability to mitigate residual displacements and permanent damage, indicators of infrastructure seismic resiliency and serviceability, should be considered in assessing seismic performance. Research has intensified on the implementation of materials such as Shape Memory Alloys (SMAs) and Engineered Cementitious Composites (ECCs) due to their preferred mechanical properties to improve seismic resilience. The superelastic properties demonstrated by SMAs and the enhanced tensile strength and ductility of ECCs compared to normal strength concrete make these materials attractive alternatives for components in the seismic force resisting systems in reinforced concrete structures. Their unique properties, relative novelty, and lack of design guidelines result in uncertainty when designing structural elements that incorporate ECCs or SMAs. This paper investigates influential behavioural mechanisms in the analysis of slender shear walls that incorporate hybrid steel-SMA reinforcing bars and ECC subjected to reverse cyclic loading. The numerical studies are performed using the two-dimensional nonlinear finite element program VecTor2. Amongst the behavioural models found to be influential in the numerical response of shear walls containing SMA bars and ECC are the tension and compression response of the ECC material. The available built-in models for FRC tension were investigated to determine their applicability and accuracy in modelling the response of ECC. Additionally, the influence of local fracture of the reinforcement was investigated. The results indicate that the mechanical properties of ECC may not be accurately captured by current FRC models calibrated using steel fibre specimens and may result in overestimation of stiffness prior to yielding of the structural element.
Modelling Hybrid Steel-Shape Memory Alloy Reinforced Shear Walls Repaired with Engineered Cementitious Composites
Lecture Notes in Civil Engineering
Desjardins, Serge (Herausgeber:in) / Poitras, Gérard J. (Herausgeber:in) / El Damatty, Ashraf (Herausgeber:in) / Elshaer, Ahmed (Herausgeber:in) / Martins-Robalino, Austin (Autor:in) / Ferche, Anca (Autor:in) / Palermo, Dan (Autor:in)
Canadian Society of Civil Engineering Annual Conference ; 2023 ; Moncton, NB, Canada
Proceedings of the Canadian Society for Civil Engineering Annual Conference 2023, Volume 13 ; Kapitel: 29 ; 365-379
03.09.2024
15 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch