補修・補強(構造)Ⅱ／新材料・新工法（構造）

[2210] STRUCTURAL STRENGTHENING OF RC CORBEL SUBJECTED TO LOCAL FAILURE CRITERION BY EXTERNAL CFRP WRAP

座長(土木)：森川英典
座長(建築)：熊谷仁志
講演者：Ram Chandra NEUPANE¹, 長井宏平² (1.The University of Tokyo 2.東京大学)

キーワード：RC corbel, carbon fiber, structural strengthening, non-linear FE analysis, RCコーベル, 炭繊維, 補修, 非線形有限要素解析

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External wrapping of fiber reinforced polymer (FRP) composites to strengthen reinforced concrete structure has been proved to be effective in beam and column structures. An experimental investigation has been carried out to study the effectiveness of external application of epoxy-based carbon fiber on RC corbel. Corbel with same geometry and internal reinforcement condition is tested for two different shear span to depth ratio. Designed size of pad to transmit load to corbel is shifted to edge of corbel to characterize local failure criterion. Effect of two different ways of application namely; CFRP full wrap and CFRP up to corbel-column interface, to retrofit corbel, with load bearing pad at its edge is studied. Test result shows externally bonded CFRP can significantly increase ultimate load capacity of RC corbel subjected to local failure criterion but will not be able to recover as much as designed capacity. Test results expressed in load-displacement curve and crack pattern are also verified by non-linear 3D finite element analysis.