Seismic response control of core wall structures using tuned viscous mass damper (TVMD) outriggers

• Published in: Engineering structures Vol. 292; p. 116546
• Main Authors: Jia, Ruofan, Ji, Xiaodong, Cheng, Yuhao, Ikago, Kohju
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-10-2023
• Subjects: Core wall; Damped outrigger; High-rise building; Seismic response control; Tuned viscous mass damper (TVMD); Seismic response control; Tuned viscous mass damper (TVMD); Damped outrigger; Core wall; High-rise building
• ISSN: 0141-0296; 1873-7323
• DOI: 10.1016/j.engstruct.2023.116546

•A novel model is proposed to represent a core wall equipped with TVMD outriggers.•The TVMD outrigger system effectively controls drift and acceleration responses.•Control effect of TVMD outrigger system is compared with other types of systems.•Seismic control mechanism is illustrated by energy analysis and modal decomposition.•Multiple TVMD outriggers achieve effective control with reduced demand of parameters.
This paper presents research on the seismic response control of core wall structures through the installation of innovative damped outriggers known as tuned viscous mass damper (TVMD) outriggers. In this novel system, the TVMDs are arranged vertically between the outrigger trusses/beams and perimeter columns. A simplified model based on the distributed-parameter system was developed to represent a core wall structure equipped with TVMD outriggers. The dynamic properties and seismic responses of high-rise buildings were calculated through a dynamic analysis of the simplified model in MATLAB. The results indicate that TVMD outriggers designed by using fixed-point theory not only suppress the dynamic responses for the target tuning mode, but also supplement additional damping to lower-order modes. When tuned to the second mode, TVMD outriggers with a mass ratio of 0.1 reduce the maximum inter-story drift and floor acceleration responses by 23.48% and 35.80%, respectively. In addition, the control advantages of TVMD outriggers were demonstrated through energy dissipation analysis and damper force decomposition. The vibration control performance of multiple TVMD outriggers was also investigated and was found to achieve superior seismic control with a significantly reduced demand on the TVMD parameters.