MEASURES TO STOP THE DYNAMIC PROPAGATION OF LOCAL BUCKLING FOR SINGLE LAYER RETICULATED DOMES

摘要

Due to the fact that a local node instability can spread into a general instability for single-layer reticulated shells, if the dynamic effect of the loads is considered, this paper deals with the possible ways of stopping this spreading, by modifying the geometrical characteristics of the cross-sections of the members There were taken into account geometrical imperfections or non-uniform loads applied on the analysed shells. There were found out the members that needed to be modified, and also the new values for the geometrical characteristics of the cross-sections of these members - both of them for two types of single-layer reticulated structures. The software used for all these numerical simulations was ANSYS 5.3.