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A platform for research: civil engineering, architecture and urbanism
Structural Seismic Response Mitigation using Optimized Vibro-Impact Nonlinear Energy Sinks
A nonlinear targeted energy transfer mechanism called Vibro-Impact Nonlinear Energy Sink (VI NES) is studied in the present work for seismic mitigation of building frames. In order to best tune VI NES parameters including clearance and stiffness ratio, the problem is formulated via an optimization framework. To form the objective function and trace the structural behavior, several seismic performance indices developed in previous works are employed. Carrying out nonlinear dynamic time history analyses on a number of low and medium-rise steel moment frames with an attached VI NES and performing Fourier analyses on the obtained structural responses, reveal a short reaction time and broadband energy dissipation in the passively controlled structure through the attached VI NES. VI NES parameters are also determined via the optimization process under the scaled earthquake time history record that has the closest spectrum to the target spectrum. The seismic performance indices are evaluated to test the trained (optimized) case under other earthquake records in the set and yield appropriate results.
Structural Seismic Response Mitigation using Optimized Vibro-Impact Nonlinear Energy Sinks
A nonlinear targeted energy transfer mechanism called Vibro-Impact Nonlinear Energy Sink (VI NES) is studied in the present work for seismic mitigation of building frames. In order to best tune VI NES parameters including clearance and stiffness ratio, the problem is formulated via an optimization framework. To form the objective function and trace the structural behavior, several seismic performance indices developed in previous works are employed. Carrying out nonlinear dynamic time history analyses on a number of low and medium-rise steel moment frames with an attached VI NES and performing Fourier analyses on the obtained structural responses, reveal a short reaction time and broadband energy dissipation in the passively controlled structure through the attached VI NES. VI NES parameters are also determined via the optimization process under the scaled earthquake time history record that has the closest spectrum to the target spectrum. The seismic performance indices are evaluated to test the trained (optimized) case under other earthquake records in the set and yield appropriate results.
Structural Seismic Response Mitigation using Optimized Vibro-Impact Nonlinear Energy Sinks
Ahmadi, Mostafa (author) / K. A. Attari, Nader (author) / Shahrouzi, Mohsen (author)
Journal of Earthquake Engineering ; 19 ; 193-219
2015-02-17
27 pages
Article (Journal)
Electronic Resource
English
Structural Seismic Response Mitigation using Optimized Vibro-Impact Nonlinear Energy Sinks
| Online Contents | 2015