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Seismic resilience analysis of self-centering prestressed concrete frames with generalized flag-shaped hysteretic behavior
https://orcid.org/0000-0003-0890-2861
Highlights A self-centering prestressed concrete frame with generalized flag-shaped hysteretic behavior (GFS-SCPC) is proposed to enhance the seismic resilience. Second stiffness and energy dissipation ratio on the seismic performance of GFS-SCPC frames is studied. Resilience of GFS-SCPC frames is performed incorporating the key parameters with FEMA P-58 methodology.
Abstract To increase the stiffness and energy dissipation of conventional self-centering concrete joints, this paper proposes a self-centering prestressed concrete frame with a generalized flag-shaped hysteretic behavior (GFS-SCPC). First, the working mechanism of the GFS-SCPC joint is clarified, and the key parameters affecting the generalized flag-shaped hysteresis are proposed: the second stiffness k s θ and the energy dissipation ratio β E. Subsequently, the three-dimensional self-centering prestressed concrete frame with flag-shaped hysteretic behavior (FS-SCPC) and GFS-SCPC frames are established, and the time history analysis and incremental dynamic analysis (IDA) method are carried out to compare their seismic performances. Finally, according to the FEMA P-58 specification, the resilience indexes of the frames with different hysteretic parameters are evaluated to clarify the influence of k s θ and β E. The results show that the energy dissipation capacity of the GFS-SCPC frame increases with larger second stiffness k s θ and the energy dissipation ratio β E. The increase of k s θ effectively controls the maximum drift angle and acceleration response of the GFS-SCPC frame, which would reduce the vulnerability of the structure. The main structure of the GFS-SCPC frame remains undamaged after the earthquake, and the loss mainly comes from the damage of the acceleration-sensitive non-structural components of the upper floors. The increase of k s θ can effectively reduce the damage degree of non-structural components and further reduce the resilience indexes, including casualties, repair time and repair cost, while the increase of β E alone does not significantly improve the resilience indexes. Therefore, the proposed GFS-SCPC frame with larger second stiffness has better seismic resilience performance.
Seismic resilience analysis of self-centering prestressed concrete frames with generalized flag-shaped hysteretic behavior
https://orcid.org/0000-0003-0890-2861
Highlights A self-centering prestressed concrete frame with generalized flag-shaped hysteretic behavior (GFS-SCPC) is proposed to enhance the seismic resilience. Second stiffness and energy dissipation ratio on the seismic performance of GFS-SCPC frames is studied. Resilience of GFS-SCPC frames is performed incorporating the key parameters with FEMA P-58 methodology.
Abstract To increase the stiffness and energy dissipation of conventional self-centering concrete joints, this paper proposes a self-centering prestressed concrete frame with a generalized flag-shaped hysteretic behavior (GFS-SCPC). First, the working mechanism of the GFS-SCPC joint is clarified, and the key parameters affecting the generalized flag-shaped hysteresis are proposed: the second stiffness k s θ and the energy dissipation ratio β E. Subsequently, the three-dimensional self-centering prestressed concrete frame with flag-shaped hysteretic behavior (FS-SCPC) and GFS-SCPC frames are established, and the time history analysis and incremental dynamic analysis (IDA) method are carried out to compare their seismic performances. Finally, according to the FEMA P-58 specification, the resilience indexes of the frames with different hysteretic parameters are evaluated to clarify the influence of k s θ and β E. The results show that the energy dissipation capacity of the GFS-SCPC frame increases with larger second stiffness k s θ and the energy dissipation ratio β E. The increase of k s θ effectively controls the maximum drift angle and acceleration response of the GFS-SCPC frame, which would reduce the vulnerability of the structure. The main structure of the GFS-SCPC frame remains undamaged after the earthquake, and the loss mainly comes from the damage of the acceleration-sensitive non-structural components of the upper floors. The increase of k s θ can effectively reduce the damage degree of non-structural components and further reduce the resilience indexes, including casualties, repair time and repair cost, while the increase of β E alone does not significantly improve the resilience indexes. Therefore, the proposed GFS-SCPC frame with larger second stiffness has better seismic resilience performance.
Seismic resilience analysis of self-centering prestressed concrete frames with generalized flag-shaped hysteretic behavior
https://orcid.org/0000-0003-0890-2861
Highlights A self-centering prestressed concrete frame with generalized flag-shaped hysteretic behavior (GFS-SCPC) is proposed to enhance the seismic resilience. Second stiffness and energy dissipation ratio on the seismic performance of GFS-SCPC frames is studied. Resilience of GFS-SCPC frames is performed incorporating the key parameters with FEMA P-58 methodology.
Abstract To increase the stiffness and energy dissipation of conventional self-centering concrete joints, this paper proposes a self-centering prestressed concrete frame with a generalized flag-shaped hysteretic behavior (GFS-SCPC). First, the working mechanism of the GFS-SCPC joint is clarified, and the key parameters affecting the generalized flag-shaped hysteresis are proposed: the second stiffness k s θ and the energy dissipation ratio β E. Subsequently, the three-dimensional self-centering prestressed concrete frame with flag-shaped hysteretic behavior (FS-SCPC) and GFS-SCPC frames are established, and the time history analysis and incremental dynamic analysis (IDA) method are carried out to compare their seismic performances. Finally, according to the FEMA P-58 specification, the resilience indexes of the frames with different hysteretic parameters are evaluated to clarify the influence of k s θ and β E. The results show that the energy dissipation capacity of the GFS-SCPC frame increases with larger second stiffness k s θ and the energy dissipation ratio β E. The increase of k s θ effectively controls the maximum drift angle and acceleration response of the GFS-SCPC frame, which would reduce the vulnerability of the structure. The main structure of the GFS-SCPC frame remains undamaged after the earthquake, and the loss mainly comes from the damage of the acceleration-sensitive non-structural components of the upper floors. The increase of k s θ can effectively reduce the damage degree of non-structural components and further reduce the resilience indexes, including casualties, repair time and repair cost, while the increase of β E alone does not significantly improve the resilience indexes. Therefore, the proposed GFS-SCPC frame with larger second stiffness has better seismic resilience performance.
Seismic resilience analysis of self-centering prestressed concrete frames with generalized flag-shaped hysteretic behavior
Zheng, Jule (Autor:in) / Zhou, Zhen (Autor:in) / Zeng, Bin (Autor:in) / Huang, Linjie (Autor:in)
Engineering Structures ; 297
21.09.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Seismic Performance of Rocking Frames with Flag-Shaped Hysteretic Behavior
| Online Contents | 2017
| DOAJ | 2022