2019 CSCE Annual Conference - Laval (Greater Montreal)

2019 CSCE Annual Conference - Laval (Greater Montreal) Conference


Title
CASE STUDY OF PERFORMANCE OF A TUNED MASS DAMPER WITH AN EDDY CURRENT DAMPING SYSTEM FOR BUILDING MOTION CONTROL IN WIND

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Author(s)
Dr. Chien-Shen (Tom) Lee, RWDI Inc. (Presenter)
Mr. Dan Li, RWDI
Mr. Trevor Haskett, RWDI Inc.
Mr. Andrew Smith, RWDI Inc.
Mr. Derek Kelly, RWDI Consulting Engineers
Abstract

A case study of performance of a TMD with an eddy current damping system for a high-rise building in Shanghai, China during a strong typhoon on July 2018 will be presented.

A 1000 tonne TMD was installed in a high-rise building in Shanghai, China. The TMD was designed not only to reduce building motion in wind but also to be an architecture feature. In addition, a unique form of damping was added to the system. A large array of rare earth magnets was attached to the pendulum mass and a layer of copper plate was fixed to the floor. As the TMD travels back and forth, electrical eddy currents are passively formed that create a force that resists the motion of the pendulum mass relative to the tower to dissipate energy. 

The TMD has been servicing since 2016. A strong typhoon, Ampil, hit Shanghai on July 2018. The TMD was engaged during the time of the typhoon affecting Shanghai. The accelerations of the building and the TMD were simultaneously recorded during the time. The recorded data was analyzed to verify the TMD performance.

The case study will discuss the design concept of the TMD, dynamic analysis of the TMD performance in wind, some design of the TMD, and a comparison of the predicted TMD performance to the measured one during the typhoon. The measured results indicate that the TMD performance is well predicted.