The ultimate strength of double-layer grids is determined by the member buckling and yielding. After buckling, the grids lose most of their strength. In this paper, we investigate the structural properties of double-layer grids with eccentric joints to improve deformation capacity. These grids consist of units of truss connected together by eccentric joint members. The loading tests and numerical analysis are carried out to investigate the influence of the rigidity of eccentric joint members and the difference of the progressive collapse mechanisms. As the result, these grids show stable behavior compared with that of the conventional grids.
