国際セッション（構造工学）

[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)

キーワード：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.