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Directional mass dampers for buildings under wind or seismic loads
Three passive damper configurations are studied for buildings: unidirectional dampers oriented to the story principal axes and dampers with a single mass attached to spring-dashpot elements laid out at 90 degree/120 degree to each other. A simple damper design procedure to minimize a weighted combination of RMS building responses, using the concept of structure-constrained feedback control, is presented. Examples of six tall buildings with roof dampers and various plan geometries are considered. Performance of the sample dampers under along/across wind loads and seismic excitation are studied. With varying loading direction, unidirectional dampers show differing levels of control performance; however, performance of the latter types of dampers appears independent of excitation direction. For multi-winged buildings a good damper seems to be a single mass connected to one set of spring-dashpot elements for each wing; for wings exactly or nearly aligned with each other, a single spring-dashpot unit in one of them appears sufficient. Numerical results for performance and effectiveness of the dampers are presented and discussed.
Directional mass dampers for buildings under wind or seismic loads
Three passive damper configurations are studied for buildings: unidirectional dampers oriented to the story principal axes and dampers with a single mass attached to spring-dashpot elements laid out at 90 degree/120 degree to each other. A simple damper design procedure to minimize a weighted combination of RMS building responses, using the concept of structure-constrained feedback control, is presented. Examples of six tall buildings with roof dampers and various plan geometries are considered. Performance of the sample dampers under along/across wind loads and seismic excitation are studied. With varying loading direction, unidirectional dampers show differing levels of control performance; however, performance of the latter types of dampers appears independent of excitation direction. For multi-winged buildings a good damper seems to be a single mass connected to one set of spring-dashpot elements for each wing; for wings exactly or nearly aligned with each other, a single spring-dashpot unit in one of them appears sufficient. Numerical results for performance and effectiveness of the dampers are presented and discussed.
Directional mass dampers for buildings under wind or seismic loads
Ankireddi, S. (author) / Yang, H.T.Y. (author)
Journal of Wind Engineering and Industrial Aerodynamics ; 85 ; 119-144
2000
26 Seiten, 20 Quellen
Article (Journal)
English
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