Abstract
ABSTRACT: In this study, the first story in a multi-storied reinforced
concrete structural wall with openingswas strengthened using carbon
fiber sheets (CF sheets) and carbon fiber grids (CF grids). The effect
of shear reinforcement and repair on earthquake resisting behavior
were examined with a horizontal forcing experiment for several specimens
having different opening positions and opening shapes. The maximum
strength and deformability were improved by the CF grid reinforcement
of the wall irrespective of opening positions, etc. The deformability
was greatly improved by establishing vertical slits in the wall at
the four corners of the opening, and reinforcing the columns and
sleeve walls using CF sheets. It was possible to evaluate approximately
the ultimate flexural and shear capacities of the test specimens
in which the reinforcement method differs, by correlating with the
fracture modes.
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