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A platform for research: civil engineering, architecture and urbanism
Seismic Fragility of Using Friction Dampers to Retrofit Non-ductile Reinforced Concrete Shear Wall Buildings in Western Canada
Reinforced concrete (RC) shear wall buildings designed pre-1980 in Canada are vulnerable to earthquake hazards due to insufficient ductility and brittle failure mechanism of the shear wall. Energy dissipation devices, such as friction dampers, bear the potential to enhance the earthquake resistance of civil engineering structures, while their applicability to shear wall buildings remains unclear. One fundamental challenge lies in the lack of a viable layout design of damper devices to fully engage their stroke capacity to dissipate sufficient earthquake energy. This challenge is aggravated in western Canada because of its elevated level of seismicity. To address these issues, this study relies on seismic fragility analyses to explore the effectiveness of using friction dampers to retrofit non-ductile RC shear wall buildings in western Canada. Finite element models are developed to integrate nonlinear behaviours of shear wall buildings, different layout designs of friction dampers, and their hysteretic force–displacement relationships. Site-consistent seismic hazard model is developed for a benchmark site in western Canada, namely the city of Victoria, from which a large suite of spectra-consistent ground motions is selected for nonlinear time history analyses. By comparing seismic demand with the shear wall’s capacity, different sets of seismic fragility models are developed to assess to what degree each proposed damper design would change the seismic fragility of shear wall building.
Seismic Fragility of Using Friction Dampers to Retrofit Non-ductile Reinforced Concrete Shear Wall Buildings in Western Canada
Reinforced concrete (RC) shear wall buildings designed pre-1980 in Canada are vulnerable to earthquake hazards due to insufficient ductility and brittle failure mechanism of the shear wall. Energy dissipation devices, such as friction dampers, bear the potential to enhance the earthquake resistance of civil engineering structures, while their applicability to shear wall buildings remains unclear. One fundamental challenge lies in the lack of a viable layout design of damper devices to fully engage their stroke capacity to dissipate sufficient earthquake energy. This challenge is aggravated in western Canada because of its elevated level of seismicity. To address these issues, this study relies on seismic fragility analyses to explore the effectiveness of using friction dampers to retrofit non-ductile RC shear wall buildings in western Canada. Finite element models are developed to integrate nonlinear behaviours of shear wall buildings, different layout designs of friction dampers, and their hysteretic force–displacement relationships. Site-consistent seismic hazard model is developed for a benchmark site in western Canada, namely the city of Victoria, from which a large suite of spectra-consistent ground motions is selected for nonlinear time history analyses. By comparing seismic demand with the shear wall’s capacity, different sets of seismic fragility models are developed to assess to what degree each proposed damper design would change the seismic fragility of shear wall building.
Seismic Fragility of Using Friction Dampers to Retrofit Non-ductile Reinforced Concrete Shear Wall Buildings in Western Canada
Lecture Notes in Civil Engineering
Gupta, Rishi (editor) / Sun, Min (editor) / Brzev, Svetlana (editor) / Alam, M. Shahria (editor) / Ng, Kelvin Tsun Wai (editor) / Li, Jianbing (editor) / El Damatty, Ashraf (editor) / Lim, Clark (editor) / Ning, Chunxiao (author) / Xie, Yazhou (author)
Canadian Society of Civil Engineering Annual Conference ; 2022 ; Whistler, BC, BC, Canada
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2022 ; Chapter: 18 ; 275-289
2024-02-06
15 pages
Article/Chapter (Book)
Electronic Resource
English
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