Abstract
The present paper discusses the semi-active vibration control of double-layer cylindrical lattice shells with variable damping mechanisms. Some attempts to install the passive or active control devices to the lattice shell roofs are proposed for the purpose of controlling the seismic response of shell and spatial structures. Nowadays reserches of semi-active control is developed that produces any adjustable control forces by using variable damping mechanisms. However, there are few applications of this control method to the spatial strucutures. First, we attempt to apply the semi-active control method to a double-layer cylindrical lattice shell to reduce the seismic response. Second, the control effects are analysed and the results obtained by time history analysis are compared with of the passive and active control. Moreover, an arrangement method of variable dampers that considers the unique vibration characteristics of the lattice shells is proposed.
