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Published on: April 13, 2016
Parameter optimization of vibration control system for adjacent building structures based on negative stiffness
Xiaofang Kang1,2, Jianjun Tang3,4, Jiachen Wei3,4
1Key Laboratory of Environmental Geotechnics, Anhui Jianzhu University, Hefei, 230601, Anhui Province, China. xiaofangkang@ahjzu.edu.cn.
Negative stiffness inerter dampers (NSIDs) effectively mitigate earthquake damage in adjacent buildings by reducing collisions and displacement. These devices enhance structural stability and seismic resilience, with potential for energy harvesting.
Area of Science:
- Structural Engineering
- Seismic Hazard Mitigation
- Vibration Control Systems
Background:
- Earthquakes induce lateral collisions between adjacent buildings, leading to severe structural damage and increased seismic risk.
- Existing seismic protection strategies often require significant retrofitting or are limited in scope.
Purpose of the Study:
- To investigate the application of negative stiffness inerter damper (NSID) devices for vibration control in single-story adjacent building structures.
- To optimize NSID design parameters for enhanced seismic performance and explore their energy harvesting potential.
Main Methods:
- Development of a unified dynamic model for vibration control systems incorporating various NSID types under seismic excitation.
- Utilization of H2 norm theory and Monte Carlo pattern search for optimizing design parameters.
- Analysis of the dynamic characteristics and vibration control effectiveness of the NSID-equipped structures.
Main Results:
- NSID installation significantly improves the seismic capacity of adjacent buildings, reducing collision risks and inter-story displacement.
- The negative stiffness inerter damper enhances system robustness, stability, and overall seismic performance.
- Investigation into the feasibility of converting seismic energy into usable electricity using NSID-based devices.
Conclusions:
- Negative stiffness inerter dampers are effective in mitigating seismic-induced damage and enhancing the resilience of adjacent building structures.
- Optimized NSID designs offer superior vibration control compared to conventional methods.
- NSID technology presents a promising avenue for both structural protection and seismic energy harvesting.
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