To investigate the effect of freeze thaw action on the seismic behavior of masonry structures,in this study,we investigated the responses of four pieces of brick walls with a constructional column,all having the same properties.We conducted freeze thaw action experiments and low cyclic loading experiments for freeze thaw cycles numbering 0,40,80,and 120.By observation and analysis of the failure modes and mechanical properties of the brick walls with a constructional column,we obtained the performance degradation characteristics associated with an increase in the number of freeze thaw cycles in brick walls.The results show that the failure modes of brick walls under freeze thaw action differ from those that remain intact.With an increase in the number of freeze thaw cycles,cracks appeared earlier and developed more quickly,and the specimens were damaged more seriously.The bearing capacity,stiffness,and ductility of the specimens also decreased significantly and their dissipation capability decreased with an increase in the number of cycles.To gain a more in-depth understanding of the effect of freeze thaw cycles on brick walls,in this paper,we analyze the damage mechanism of the brick wall from both the microcosmic and macroscopic perspectives.The main microcosmic factor influencing the walls is the hydrostatic pressure result from freezing,and the main macroscopic factors are the efflorescence phenomenon and the interface damage caused by freezing.