Performance of single-layer reticulated domes under impact load and gravity

To investigate the dynamic response of reticulated domes under impact load,a model of KIEWITT8 single-layer reticulated dome with span of 60 m was established and simulated by ANSYS/LS-DYNA. The dynamic response of dome under impact load was calculated and compared with or without the consideration of gravity. Results show that gravity sensitivity,effect of centrifugal load,large displacement of geometry all cause the difference between the two situations. Moreover,the exact dynamic response can not be obtained without the consideration of gravity. Moreover,the analysis on 135 examples indicates that the vertical displacement and stress of main elements increase with the increasing impact mass or impact velocity,but they do not change after increasing the impact mass or impact velocity to a certain degree.