Seismic Response Reductions for Cylindrical Lattice Shell Roofs by Plural TMDs Installing in Roof Structure and Supporting Substructure Distributed for Purpose of Dispersing Loads

TMD (Tuned Mass Damper) is fit for the vibration control of a spatial structure because it is possible to install the TMDs by a single supporting point. Therefore, there are many studies on the vibration control for a spatial structure by TMDs. However, the effects of degrees of connections at joints between roof structure and supporting substructure on the vibration modes controlled by installing TMDs are not examined. In addition, depending on the half open angles of roof structures, multiple TMDs are concentrated at a single node by the antinodes of multiple controlled modes overlapping. As a results the stresses of members near that node may increase. Therefore, this paper is intended as an investigation of the effects of changes in degrees of connection between roof structure and supporting substructure and the effects of distributed installation of multiple TMDs installed on roof structure and supporting substructure for purpose of dispersing loads at nodes of roof on the response reduction effects by TMDs for cylindrical lattice shell roofs.