The purpose of this study is to assess the strengthening effect of fiber-reinforced polymer(FRP) grids on flexural members. For this purpose, experimental study was conducted using seven flexural specimens with the main variables of an FRP grid and inorganic mortar used as adhesive. All the specimens failed due to the tensile rupture of FRP grids without debonding between FRP grids and inorganic mortar. It was found that the strengthening effect was dependent on the material properties of FRP grids.

This study is to understand the structural behavior of flexural member according to the splice length of specimens reinforced by GFRP reinforcing bar. As compared with reinforcement, GFRP reinforcing bar has superior material properties such as non-corrosiveness, light weight, non-conduction, etc. However, GFRP reinforcing bar is difficult to use instead of reinforcement owing to brittle fracture when it failed. Therefore, GFRP reinforcing bar mixed with deformed reinforcing bar were used. A total of 5 specimen was produced and tested and the test main variables are the diameter of tension steel, lap splice length of GFRP reinforcing bar which are for investigating the reinforcement effects. The diameter of tension steel set as D10, and D13 and the lap splice length of GFRP reinforcing bar set as 30db, 45db and, 60db. The results of the experimental test, the specimen with GFRP reinforcing bar proved more reinforcement effect than the one without GFRP tie bar. At the same time, the specimen with tension steel of D13 increased an overall strength more than the one with tension steel of D10. The longer lap splice length showed increase the strength.

This study is to investigate the waterproofing effects on the splice length of the waterproofed sheet. A Total of 10 specimens were produced and tested in order to investigate the waterproofing effects for reinforced concrete members. Test variables are the lengths of splice, the attachment method of waterproofed sheet and existence of mesh. The splices’ length set as 5%, 6.6%, and 10% of waterproofed sheet’s width. Two ways of Epoxy adhesion and hot-melt were used. Also, the mesh put to enhance the adhesion capacity between waterproofed sheets. The results of the experimental test, the specimens which composed with splice length over 6.6% of waterproofed sheet, epoxy adhesion constructed and with/without mesh did not showed water leakage. Whereas, the specimen of splice length under 5% and epoxy applied showed water leakage. In addition, the specimen with mesh (BE-S1-M1) proved less water leakage than the one without mesh (BE-S1-M0).