International Session (Structural Engineering)

[CS2-27] CONSTANT LOW-ENERGY CONSECUTIVE DROP-WEIGHT IMPACT LOADING FOR RC BEAMS STRENGTHENED IN FLEXURE WITH LARGE-VOLUME OF AFRP SHEETS

〇Sinh Le Huy¹, Masato Komuro¹, Norimitsu Kishi¹, Hiroshi Mikami², Tomoki Kawarai¹ (1.Muroran Institute of Technology, 2.Sumitomo Mitsui Construction)

Keywords:FRP sheet, strengthening in flexure, consecutive impact loading, RC beams, sheet debonding

To establish an adequate upgrading method for RC beams under impact loading, consecutive drop-weight impact loading tests for the RC beams strengthened in flexure with AFRP sheets were conducted.The results obtained as follows: 1) in the cases of energy-increasing consecutive and single impact loading, the beams reached the ultimate state with the sheet debonding; 2) in the case of constant low-energy consecutive impact loading, the sheet did not debond and the concrete around the loading point crushed due to accumulated damages; and 3) the sheet tends to debond when the absolute residual displacement of the beam was less than the calculated deflection at the ultimate state under static loading.