Frequency independent damped outrigger systems for multi‐mode seismic control of super tall buildings with frequency independent negative stiffness enhancement

M Wang, FF Sun, Y Koetaka, L Chen… - Earthquake …, 2023 - Wiley Online Library
Damped outrigger system is effective for improving energy dissipation for tall buildings.
However, conventional damped outrigger (CDO) system with viscous damping has two …

Evolution of outrigger structural system: a state-of-the-art review

BG Kavyashree, S Patil, VS Rao - Arabian Journal for Science and …, 2021 - Springer
This paper presents the development of the outrigger structural system from the
conventional outrigger to damped outrigger concepts. Outrigger structural system …

Dynamic characteristics and responses of damped outrigger tall buildings using negative stiffness

M Wang, S Nagarajaiah, FF Sun - Journal of Structural Engineering, 2020 - ascelibrary.org
By introducing negative stiffness devices, this study further improves the maximum
achievable damping ratio of conventional damped outrigger (CDO) structures with flexible …

Adaptive stiffness structures with dampers: seismic and wind response reduction using passive negative stiffness and inerter systems

S Nagarajaiah, L Chen, M Wang - Journal of Structural Engineering, 2022 - ascelibrary.org
High-rise structures and large-span bridges have low vibration frequencies and low intrinsic
damping and hence are subjected to multimode vibrations under environmental excitation …

Vibration mitigation of long-span bridges with damped outriggers

L Chen, Z Liu, S Nagarajaiah, L Sun, L Zhao… - Engineering Structures, 2022 - Elsevier
Long-span bridges have low vibration frequencies and small intrinsic damping, and hence
are subjected to large-amplitude vibrations, eg, vortex-induced vibrations (VIVs), which …

Optimal design of supplemental negative stiffness damped outrigger system for high-rise buildings resisting multi-hazard of winds and earthquakes

M Wang, S Nagarajaiah, FF Sun - Journal of Wind Engineering and …, 2021 - Elsevier
This paper deals with the multi-hazard vibration reduction of high-rise buildings in resisting
earthquakes and winds, emphasizing on the optimization of supplemental negative stiffness …

Multi-objective optimal design and seismic performance of negative stiffness damped outrigger structures considering damping cost

FF Sun, M Wang, S Nagarajaiah - Engineering Structures, 2021 - Elsevier
In this paper, the seismic performance of conventional damped outrigger (CDO) is improved
by incorporating negative stiffness (NS) in parallel with the viscous damper. The applied …

Comparative study between inerter and negative stiffness damped outrigger structures

Z Wang, J Zhang, Y Zhou, C Fang, C Huang - International Journal of …, 2024 - Elsevier
Recently, damped outrigger structures have shown great potentials in suppressing
vibrations of tall buildings subjected to seismic and wind excitations. To gain insight into the …

A novel crosswind mitigation strategy for tall buildings using negative stiffness damped outrigger systems

M Wang, S Nagarajaiah, FF Sun - Structural Control and Health …, 2022 - Wiley Online Library
This study presents a new crosswind mitigation strategy by using negative stiffness damped
outrigger (NSDO) system for tall buildings. Using the “assisting motion” feature of negative …

Stochastic optimization and sensitivity analysis of the combined negative stiffness damped outrigger and conventional damped outrigger systems subjected to …

Z Wang, Y Zhou, C Fang… - Structural Control and …, 2023 - Wiley Online Library
In recent years, various kinds of damped outrigger systems, particularly with the negative
stiffness devices, have been shown to effectively suppress excessive vibration induced by …