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Seismic and resilient assessment on moment resisting frames with novel self-centering viscous dampers
Abstract A new type of self-centering viscous dampers (SCVDs) had been developed by the authors to create low-damage structures [1]. Then, the seismic and resilient performance of steel frames equipped with SCVDs were still mysteries waiting for being discovered. So, performance was analyzed among the five systems which were moment resisting, buckling restrained brace (BRB), self-centering (SC), viscous damper (VD), and SCVD frames. The 3- and 6- story frames with the aforementioned systems were subjected to 20 earthquake records of various ground types using nonlinear response history analysis. In comparison to the MRF system, the SCVD system exhibited a significant improvement. The maximum and residual story drift ratios were reduced by 90.27% and 97.78%, respectively. However, there was an increase in the maximum base shears and overturning moments of the SCVD system by 120.65% and 150.31%, respectively. Overall, MRFs equipped with SCVDs or VD parts possess better seismic and resilient performance with higher certainty than the other systems, in special, the total growth rate of the VD system can be reduced by 22.94% comprehensively. Furthermore, addition of energy dissipation capabilities is more effective in decreasing responses with higher certainty than stiffness or self-centering capabilities of the braces.
Highlights It is discussed that a novel self-centering viscous damper (SCVD) with the highest equivalent viscous damping ratio so far, and the design considerations for the SCVD were discussed. 3- and 6-story steel frames with 5 lateral resisting systems, including moment-resisting frame, buckling restrained brace, self-centering, viscous damper, and SCVD systems were designed. Modal analyses were conducted to examine the behavior of the systems. Nonlinear response history analyses were performed to study the seismic and resilient capacities of the systems. They were investigated that statistical results for the seismic and resilient performances of the systems.
Seismic and resilient assessment on moment resisting frames with novel self-centering viscous dampers
Abstract A new type of self-centering viscous dampers (SCVDs) had been developed by the authors to create low-damage structures [1]. Then, the seismic and resilient performance of steel frames equipped with SCVDs were still mysteries waiting for being discovered. So, performance was analyzed among the five systems which were moment resisting, buckling restrained brace (BRB), self-centering (SC), viscous damper (VD), and SCVD frames. The 3- and 6- story frames with the aforementioned systems were subjected to 20 earthquake records of various ground types using nonlinear response history analysis. In comparison to the MRF system, the SCVD system exhibited a significant improvement. The maximum and residual story drift ratios were reduced by 90.27% and 97.78%, respectively. However, there was an increase in the maximum base shears and overturning moments of the SCVD system by 120.65% and 150.31%, respectively. Overall, MRFs equipped with SCVDs or VD parts possess better seismic and resilient performance with higher certainty than the other systems, in special, the total growth rate of the VD system can be reduced by 22.94% comprehensively. Furthermore, addition of energy dissipation capabilities is more effective in decreasing responses with higher certainty than stiffness or self-centering capabilities of the braces.
Highlights It is discussed that a novel self-centering viscous damper (SCVD) with the highest equivalent viscous damping ratio so far, and the design considerations for the SCVD were discussed. 3- and 6-story steel frames with 5 lateral resisting systems, including moment-resisting frame, buckling restrained brace, self-centering, viscous damper, and SCVD systems were designed. Modal analyses were conducted to examine the behavior of the systems. Nonlinear response history analyses were performed to study the seismic and resilient capacities of the systems. They were investigated that statistical results for the seismic and resilient performances of the systems.
Seismic and resilient assessment on moment resisting frames with novel self-centering viscous dampers
Liu, Qiang (author) / Li, Peizhen (author) / Yuan, Cheng (author)
2023-08-19
Article (Journal)
Electronic Resource
English
Application of Viscous Dampers in Seismic Rehabilitation of Steel Moment Resisting Frames
| DOAJ | 2016