As the pilot study on textile reinforced mortar(TRM) construction method, the present research has been conducted to investigate the tensile performance of fiber-reinforced polymer(FRP) grids inserted in inorganic mortar. For this purpose, experiment was carried out using twenty specimens with the main parameters of inorganic mortar and FRP grids. As a result, splitting failure did not occur between inorganic martar and FRP grids. As FRP grids were completely fractured, the specimens failed by showing the similar tensile behavior to the mechanical properties of FRP grids.

The object of this study is to investigate the confined effects of specimens using GFRP(glass fiber reinforced polymer) sheet and PET(polyethylene terephthalate) sheet. Since GFRP and PET sheet have a grate deformation capacity, the brittle failure of concrete can be avoid. A total of specimens is sixteen and major variables are the type of strengthen material and strengthening layer. As a result of test, specimens reinforced with a glass fiber sheet compare to the standard specimen have a significant increase both strength and ductility. Ductile of the specimens reinforced with PET is superior to it of the GFRP regardless of strengthening layer. However, in the strength effect aspect is not great compare to the ductile. Resultingly, it is judged that the reinforced method with PET is available to apply field application.

Transverse reinforcement in reinforced concrete column can improve strength and ductility by confining column to expend laterally. The effects of enhancement of strength and ductility depend on the degree of confinement on transverse reinforcement. The theoretical equations about confinement effects of reinforcement concrete column were proposed by earlier investigators. In this study, it was identify the factor for significant impact on reinforced concrete circle column based on early models, and Parameter studies was carried out by each factor. Parameter studies decide the major variables for vertical interval and yield strength of transverse reinforcement, compressive strength of concrete, and sectional area. In Parameter study results, it was identify that vertical interval of transverse reinforcement is significant impact on the strength and ductility.