| Vol. - No. | Vol.10 - No.3 |
|---|---|
| Date | Oct., 2021 |
| Title |
Dynamic Characteristics and Responses of Tall Building Structures with Double Negative Stiffness Damped Outriggers |
| Author | Feifei Sun1,2, Ningling Duan2, Meng Wang2, and Jiaqi Yang2+ |
| Institutions |
1State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, China 2 Department of Structural Engineering, Tongji University, China |
| Abstract |
Dynamic characteristics of tall building structures with double negative stiffness damped outriggers (2NSDO) are parametrically studied using the theoretical formula. Compared to one negative stiffness damped outrigger (1NSDO), 2NSDO can achieve a similar maximal modal damping ratio with a smaller negative stiffness ratio. Besides, the 2NSDO can improve the maximum achievable damping ratio to about 30% with less consumption of an outrigger damping coefficient compared to the double conventional damped outriggers (2CDO). Besides, the responses of structures with 2NSDO under fluctuating wind load are investigated by time-history analysis. Numerical results show that the 2NSDO is effective in reducing structural acceleration under fluctuating wind load, being more efficient than 1NSDO. |
| Keyword | Negative stiffness, Double damped outrigger, Modal damping ratio, Vibration control |
| PP. | PP.229~242 |
| Paper File |
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