Wind-Induced Vibration Control and Analysis of Super High-Rise Structure Using Viscous Damping Walls

The wind-induced vibration control and analysis of a super high-rise structure located in the area of strong typhoon with viscous damping walls is introduced. Mechanical properties and design method of viscous damping wall are described, and then the arrangement scheme is put forward. The performances of structure with and without viscous damping walls under the condition of basic wind strength encountered once for 10 years are investigated in detail. The results show that the control scheme can dissipate energy of wind-induced vibration, attenuate structural dynamic response and reduce the mutation of acceleration along height direction effectively. The maximum peak acceleration can be reduced by 23.5% to 0.241m/s2, which meets 0.25m/s2 limit value stated by Technical specification for concrete structures of tall building. Therefore, the arrangement scheme is feasible and effective to control wind-induced vibration and improve structural safety and comfort.

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Mitigation of Wind-Induced Vibration of a 600m High Skyscraper

International Journal of Structural Stability and Dynamics ◽

10.1142/s0219455419500159 ◽

2019 ◽

Vol 19 (02) ◽

pp. 1950015 ◽

Cited By ~ 2

Author(s):

J. W. Zhang ◽

Q. S. Li

Keyword(s):

Vibration Control ◽

Tall Buildings ◽

Tall Building ◽

Dynamic Responses ◽

Structural Vibrations ◽

Structural Dynamic ◽

High Rise ◽

Structural Responses ◽

Detailed Assessment ◽

Wind Induced Vibration

The serviceability of super-tall buildings depends primarily on the wind-induced structural responses, especially accelerations. To mitigate the discomforting structural vibrations, pendulum-type tuned mass damper (TMD) systems are commonly employed in high-rise buildings. However, for a super-tall building with a considerably low fundamental natural frequency, the suspension length of a pendulum-suspended TMD (PTMD) becomes too long to be feasible as it would occupy substantial building space. For the sake of saving valuable space in a super-tall building, a multistage PTMD system is recommended for vibration control. This paper presents a detailed assessment study on the performance of a multistage PTMD system designed for a 600 m high skyscraper located in a typhoon-prone region in China. Wind tunnel tests are first conducted to determine the wind loads on the building for estimation of structural dynamic responses for the scenarios with and without installation of the multistage PTMD system. Optimal design of the multistage PTMD system is then carried out through examining the mitigation efficiency of the PTMD system for a variety of mass and damping ratios. To restrict the strokes of mass dampers in the PTMD system, two-section damping strategy is proposed. The assessment results demonstrate that the multistage PTMD system with two-section damping can function efficiently to suppress the excessive vibrations of the skyscraper, while occupying a minimal space in vertical and horizontal directions. This paper aims to provide an effective and economic design strategy for vibration control of super-tall buildings under wind excitations.

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Wind-Induced Vibration Control of High-Rise Structures Using Compound Damping Cables

Shock and Vibration ◽

10.1155/2021/5537622 ◽

2021 ◽

Vol 2021 ◽

pp. 1-9

Author(s):

Jianda Yu ◽

Zhibo Duan ◽

Xiangqi Zhang ◽

Jian Peng

Keyword(s):

Vibration Control ◽

Damping Ratio ◽

Viscosity Coefficient ◽

Structural Vibration ◽

Vibration Displacement ◽

High Rise ◽

Main Cable ◽

Small Vortex ◽

Wind Induced Vibration ◽

Fluctuating Wind

Based on the vibration reduction mechanism of compound damping cables, this study focuses on the wind-induced vibration control of high-rise structures with additional mass at the top. The differential equation of motion of the system under the action of the composite damping cable is established, and the analytical solution of the additional damping ratio of the structure is deduced, which is verified by model tests. The vibration response of the structure under the action of simple harmonic vortex excitation and randomly fluctuating wind loads is studied, and the effect of different viscous coefficients of the dampers in the composite damping cable and different installation heights of the damping cable on the vibration control is analyzed. The results show that a small vortex excitation force will cause large vibrations of low-dampened towering structures, and the structure will undergo buffeting under the action of wind load pulse force. The damping cable can greatly reduce the amplitude of structural vibration. The root means square of structural vibration displacement varies with damping. The viscosity coefficient of the device and the installation height of the main cable of the damping cable are greatly reduced.

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