A STUDY ON DYNAMIC BUCKLING OF MONO-LAYER RETICULATED SHELLS UNDER IMPULSE LOADINGS

摘要

This paper is focused on the dynamic buckling of the single layer reticulated domes under uniformly distributedrnimpulse load. The computation model is a K8 single layer reticulated dome with 40m of the span and 1/7 of thernrise-span ratio. Detailed analysis is done on its elastic-plastic buckling through ANSYS/LS-DYNA. Therninfluences of loading range, loading duration and loading ways are within consideration. The results show thatrnthe critical loads corresponding to the load distribution within the second and third ring rods away from therncenter of the dome are 79% and 83% of that to the load distribution within the whole roof area. In the case of thernload distribution within the whole roof area, the critical buckling load corresponding to 50ms loading duration isrnonly 10.3% of that to 5ms and the critical buckling load under rectangle impulse loading is 48.9% of that underrntriangle impulse loading.