![]() ![]() This new technique was adapted from reinforcement methods that use HPFL and BSP. Finally, the strengthened column was cured. Interfacial agent was sprayed and high-performance mortar was plastered after the structure adhesive was solidified. ![]() Afterwards, the RC member was cleaned, and then high-strength strand was twined around column and fixed on by bolts. Next, structure adhesive was used to stick the steel plate on the RC member surface. ![]() At the beginning of this technique, holes on the part of column surface of steel plate position were repaired following the design requirements other parts of the column were chamfered and scabbled according to the design requirement. Our research group introduced the reinforcement technique strengthened with HPFL and BSP this technique adopts the advantages of HPFL reinforcement and bonded reinforcement technology. New technology for rehabilitating reinforced concrete (RC) structures has continued to emerge recently. Therefore, the calculation method could be used in the capacity design of axial compression strengthened columns. Based on the experiments and existing tests of 35 columns strengthened with HPFL, equations for the axial compression bearing capacity were proposed and all calculation results agreed well with testing results. The values of the strength reduction factor and pressure effective utilization coefficient of the mortar were suggested. The chamfering of angle bar momentously affected the primary damage of steel strand. When failure of the strengthened column occurred, the mortar and concrete were crushed and bulged outward in the middle of the columns, the angle bars and longitudinal steel bars buckled, and some stirrups were pulled out. ![]() Results show that the reinforcing layer worked together with the original columns as a whole, and the load-bearing capacity significantly increased. The load carrying capacity and failure mechanism of 8 square columns strengthened with high-performance ferrocement laminate (HPFL) and bonded steel plates (BSP) were analyzed on the basis of experiments on the axial compression performance of these columns. ![]()
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