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I confirmed the mechanical behavior of reinforced concrete columns with extended wing wall strengthened by diagonal post-installed anchor subjected to axial and horizontal loads through the structural tests. The experimental parameters were as follows, presence of inclination of anchor bars and failure mode of existing reinforced concrete column (failing in a flexural and shear mode). All test specimens experienced shear slip failure at the vertical joint between the both sides of the reinforced concrete column and the extended wing wall. From the structural tests, it was shown that the column which used diagonal post-installed anchors clearly improves ultimate strength regardless of the failure mode of existing column. Moreover, it is found that the ultimate shear strength can be evaluated using the present equation recommended in JBDPA, design standard for the reinforced concrete structures. In addition, I showed that proposed evaluation method of ultimate strength matches the test results well.

ULTIMATE STRENGTH OF RC COLUMNS WITH EXTENDED WING WALL STRENGTHENED BY DIAGONAL POST-INSTALLED ANCHOR WITH VERTICAL JOINT SLIP FAILING