The three dimensional model of masonry buildings with bottom frames and seven-storey was set up with explicit dynamic analytical software LS-DYNA.GSA criteria analysis method was carried out in the numerical analysis of the masonry buildings with bottom frames’ progressive collapse.There are some disadvantages of GSA criteria analysis method in the aspect of the simulative truth

so two-stage analysis method was created against the disadvantages of GSA criteria analysis method.The structural damage was first at local

and the local damage was the reason why the progressive collapse of the structure happened.If we use some countermeasures to prevent the structural local damages

the progressive collapse of the structure may not happen. Various masonry material strengths

reinforced ratios of the vertical bar

GFRP strengthening

steel plate strengthening

arrangement of columns

wall openings and building storey number of the bottom frames were selected to verify the model.The dynamic response laws and destructive condition of the masonry buildings with bottom frames under explosive shock were obtained.The rule of the stress and the displacement of the masonry and reinforcing bars were given at the same time.All these works offer the theoretical principle and meritorious reference data for anti-explosion design of masonry buildings with bottom frames.