Seismic reduction of single-layer reticulated domes under earthquakes

The vibration reduction analysis was carried out for K8 single-layer reticulated domes, in which all horizontal pin supports were changed as spring supports or damped spring supports, respectively. The differences of frequencies and the vibration modes between uncontrolled and controlled structures were studied in order to illustrate the vibration reduction mechanism of the reticulated domes. The maximum horizontal displacement, the maximum reactions at supports and the internal forces of the reticulated domes were calculated under frequent earthquakes. The results indicate that two kinds of vibration reduction techniques can control the reactions of this kind of reticulated dome effectively. Damped spring supports can also reduce the displacements at those horizontal supports significantly.