Min-Li Chang 1, Chi-Chang Lin 1 2 3 * §, Jin-Min Ueng 1¶, Kai-Hsiang Hsieh 3, Jer-Fu Wang 3
1Department of Civil Engineering, National Chung Hsing University, Taichung 40227, Taiwan
2College of Engineering, National Chung Hsing University, Taichung 40227, Taiwan
3Center for Environmental Restoration and Disaster Reduction, National Chung Hsing University, Taichung 40227, Taiwan
email: Chi-Chang Lin (cclin3@dragon.nchu.edu.tw)
*Correspondence to Chi-Chang Lin, Department of Civil Engineering, National Chung Hsing University, Taichung 40227, Taiwan
Dean.
Director.
§Distinguished Professor.
¶Associate Professor.
Funded by:
Ministry of Education, China Engineering Consultants, Inc.; Grant ******: CECI 95921
National Science Council of the Republic of China; Grant ******: NSC 94-2625-Z-005-009
vertical tuned mass damper • machinery • floor vibration • field testing
Abstract
This paper deals with the optimum design of a tuned mass damper (TMD) for the mitigation of machine-induced vertical vibration of structures. Theoretically, a TMD without damping tuning to the machine operating frequency will make optimum control performance. Considering zero damping is impossible, a new field-based design procedure and an adjustable vertically moving TMD (VTMD) are proposed. The VTMD is composed of variable mass blocks and changeable springs. A prototype of the VTMD was fabricated and tested on a simply supported beam and a reinforced-concrete floor of a school building. Both experimental results confirmed the control effectiveness and usefulness of the VTMD. In the beam test, more than 90% reduction in accelerations was observed. In the floor test, 41-56% acceleration reduction can be achieved even though the mass ratio of TMD to structure is very small. Copyright © 2022 John Wiley & Sons, Ltd.
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