Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Performance-based seismic design of self-centering steel moment frames with SMA-bolted connections
Abstract This paper proposes a performance-based seismic design (PBSD) method for self-centering moment-resisting frames with shape memory alloy (SMA)-bolted endplate connections. PBSD can be used to achieve different performance objectives, resulting in several benefits, such as cost-effectiveness and customization of the design. This study develops a PBSD framework by establishing a relationship between the fundamental period, ductility demand, and seismic force reduction factor and using an energy-balanced concept. The design method is facilitated using an artificial neural network (ANN)-based predictive tool and an efficient experimentally-validated phenomenological model for SMA-bolted endplate connections. Maximum drift and ductility ratios are adopted as performance objectives. Two 3- and 6-story prototype frames are designed and evaluated to illustrate the proposed PBSD method. The seismic response and collapse safety of the prototype frames at different shaking intensities are evaluated. The results show that the prototype frames designed using the proposed PBSD framework meet the prescribed design objectives and the collapse safety requirements in FEMA P695. The illustrative examples confirm that the designed moment frames possess the intended self-centering capability with negligible residual deformations as low as 0.05% at the maximum considered earthquake (MCE) hazard level. The results also confirm that the designed frames exhibit uniform drift distribution along their height.
Highlights Developing a performance-based seismic design framework for SMA-based self-centering moment resisting frames. Investigating seismic performance of SMA-based moment resisting frames through nonlinear response history analyses. Illustrating the application of a predictive tool for SMA-bolted endplate connections in seismic design and analysis. Showing the effectiveness of the developed design method to achieve the prescribed design objectives.
Performance-based seismic design of self-centering steel moment frames with SMA-bolted connections
Abstract This paper proposes a performance-based seismic design (PBSD) method for self-centering moment-resisting frames with shape memory alloy (SMA)-bolted endplate connections. PBSD can be used to achieve different performance objectives, resulting in several benefits, such as cost-effectiveness and customization of the design. This study develops a PBSD framework by establishing a relationship between the fundamental period, ductility demand, and seismic force reduction factor and using an energy-balanced concept. The design method is facilitated using an artificial neural network (ANN)-based predictive tool and an efficient experimentally-validated phenomenological model for SMA-bolted endplate connections. Maximum drift and ductility ratios are adopted as performance objectives. Two 3- and 6-story prototype frames are designed and evaluated to illustrate the proposed PBSD method. The seismic response and collapse safety of the prototype frames at different shaking intensities are evaluated. The results show that the prototype frames designed using the proposed PBSD framework meet the prescribed design objectives and the collapse safety requirements in FEMA P695. The illustrative examples confirm that the designed moment frames possess the intended self-centering capability with negligible residual deformations as low as 0.05% at the maximum considered earthquake (MCE) hazard level. The results also confirm that the designed frames exhibit uniform drift distribution along their height.
Highlights Developing a performance-based seismic design framework for SMA-based self-centering moment resisting frames. Investigating seismic performance of SMA-based moment resisting frames through nonlinear response history analyses. Illustrating the application of a predictive tool for SMA-bolted endplate connections in seismic design and analysis. Showing the effectiveness of the developed design method to achieve the prescribed design objectives.
Performance-based seismic design of self-centering steel moment frames with SMA-bolted connections
Nia, Majid Mohammadi (Autor:in) / Moradi, Saber (Autor:in) / Yang, T.Y. (Autor:in)
04.05.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| Wiley | 2024
Seismic self-centering steel beam-to-column moment connections using bolted friction devices
| Online Contents | 2008