A damage model of single-layer reticulated domes under severe earthquakes

To obtain the damage model of single-layer reticulated domes subjected to earthquakes, the FEM program ABAQUS was applied to solve the responses of structures and the UMAT subroutine was compiled for the consideration of material accumulation. Single-layer reticulated domes with span of 40 m subjected to severe earthquakes were studied by changing structural and loading parameters. According to the responses of single-layer reticulated domes, the damage model of ideal reticulated shells under earthquakes was established. The effect of structural geometric imperfections was discussed, and then the damage model and the dynamic strength failure distinguishing criterion with consideration of structural geometric imperfections were proposed.