In events of manmade or natural hazards, local structural members may be destroyed or removed and loads created by the failure structural members may be redistributed within the structure. If the capacity of structural components is exceeded by additional loads, the progressive collapse of the structure may occur. Infill walls behave as equivalent compressive struts and change the load redistribution path of frame buildings in progressive collapse scenarios. In this paper, progressive collapse mechanisms of frames with infill walls designed according to Chinese building codes are investigated by using nonlinear dynamic analyses. The deformation and internal forces under first story column removal scenarios are presented in this study. The implications and design schemes of frames with infill walls are discussed correspondingly.
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