To evaluate the axial compression mechanical properties of brick walls strengthened with concrete splint

the brick walls were put on pressure by screw tension to simulate the brick wall under the vertical load and axial compression deformation after the reinforcement in the actual situation. The axial compression experiments of six walls reinforced by sandwich wall were carried out

in which the aspect ratios were set to 0.8

and 1.1 with the axial load ratios of 0.15

0.25 and 0.35

respectively. The results show that the axial compressive deformation of the reinforced brick walls is uniform and the concrete wall on both sides of the reinforced walls is crushed before the brick wall under the additional axial pressure

which indicates that the bearing capacity of the reinforced walls is obviously improved by the concrete wall. Based on experimental results the strength utilization coefficient of the concrete and brick walls was introduced

and calculation formula of the brick wall reinforced by concrete splint was set up for limit bearing capacity calculation under the axial compression.