Experimental study on bearing capacity of eccentrically compressed H-shaped steel long columns strengthened with bonded steel plate
In order to study the effect of bonded steel plate reinforcement on the bearing capacity of H-shaped steel long columns,three H-shaped steel long columns strengthened with non-bonded steel plates and six H-shaped steel long columns strengthened with bonded steel plates in the longitudinal direction of the flange were made with the thickness of the bonded steel plate and the eccentricity of the applied load as variables.The slenderness ratio of the steel columns before and after reinforcement was greater than 30,and the compression bending test was carried out.Through the analysis of the web strain in the column,the flange strain in the column,the lateral displacement in the column and the experimental phenomena,the influence of bonded steel plate reinforcement on the mechanical stability of H-shaped steel long columns was studied.The results show that the stability of the strengthened H-shaped steel long column is poor,and the spatial bending and torsion failure occurs in the load falling section.The stability bearing capacity of the reinforced H-shaped steel long column specimen is significantly improved.The adhesive layer is firmly bonded before reaching the ultimate bearing capacity.In the load falling section,the adhesive layer is stripped,and the specimen is subject to overall bending instability failure in the plane.And under the same other conditions,the smaller the eccentricity of the strengthened specimen,the higher the bearing capacity,the greater the thickness of the bonded steel plate,and the greater the increase of the bearing capacity.
NETL
NSTL
万方数据
