Experimental study on diagonal shear performance of brick masonry strengthened with embedded aluminum alloy profiles
Under earthquake disasters,masonry structures often cause damage between layers due to insufficient shear bearing capacity.Embedding bars in mortar seam can improve the shear resistance of brick masonry structures,but the connection between layers of reinforcements is lacking.In order to improve the integrity of reinforced masonry structures,this paper proposes to use one flange of angle aluminum for caulking,and the aluminum alloy strip for connecting the other flange of the two layers of angle aluminum,to form a seam reinforcement system with interlayer connection.Through the compression shear test of the strengthened specimens,the shear strengthening mechanism of the strengthening system to the masonry structure is studied.The results show that the reinforcement form of the reinforcement using aluminum alloy profiles for caulking can significantly improve the shear strength of the masonry structure,and the shear strength of different strengthened specimens is 28.72%to 88.29%higher than that of the unstrengthened specimens.The bending section coefficient of angle aluminum is high so that the embedded flange can keep a straight line,which is beneficial to the masonry bonding on both sides of the angle aluminum caulking flange.The aluminum alloy strip has poor compressive stability.When the aluminum alloy strip connecting the caulked angle aluminum is under tension,the reinforcement effect is better than when it is under compression.And the tie action between the aluminum alloy strip and angle aluminum can effectively prevent the interlaminar failure of masonry wall,inhibit the expansion of cracks,and improve the integrity of masonry structure.
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