Abstract:Reinforcement effect of reinforced concrete (RC) eccentric compressive column strengthened by steel wire mesh reinforced resin concrete (HTRCS) was researched based on a self-developed reusable loading device.The impacts of number of steel wire mesh and position of reinforcement layer on the failure mode and bearing capacity were analyzed through eight specimens with large eccentricity.Behaviors of two non-strengthened specimens loaded through a conditional device and a self-developed device respectively were compared to analyze the impact of the self-developed device on the force condition of eccentric column.Lastly,finite element software was adopted to analyze the impacts of parameters such as the thickness of reinforcement layer and eccentricity of load on the bearing capacity of specimens in order to further understand the reinforcement mechanism.Results showed that the self-developed loading device not only solve the security problem of vertical loading,but also reflect the actual condition of the column.For specimen strengthened at tensile side,the crack distribution at the tensile side is closely related to the number of steel wire mesh.When the number of steel wire mesh is arranged properly,the crack distribution at the tensile side is a type of reticular.For specimen strengthened at compressive side,the spacing of cracks at tensile side is not related to the number of steel wire mesh.However,the width of crack decreases with the increase of number of steel wire mesh.The bearing capacity of specimen can be improved effectively by HTRCS,while the reinforcement mechanisms are different for different reinforcement positions.The bearing capacity of specimen strengthened at tensile side is mainly controlled by the number of steel wire mesh.The increase of bearing capacity is only 8% for specimen strengthened at tensile side by 2 cm HTRCS without steel wire mesh.The bearing capacity of specimen strengthened at compressive side is mainly controlled by the thickness of reinforcement layer.The increase of bearing capacity can reach to 30% for specimen strengthened at compressive side by 2 cm HTRCS without steel wire mesh.The reinforcement effect of specimen strengthened at the tension side is more obvious than that at the compression side when the ratio of eccentricity to the length of column section along the eccentricity direction is more than 0.7.