This paper presents the results of an experimental study on the effectiveness
of using externally bonded carbon fibre sheets as a retrofit and
repair method for concrete shear walls. The experimental testing
program, which has been carried out in two phases, is presented.
The observed behaviours of the shear wall specimens are discussed.
The test specimens include control walls, repaired walls, and strengthened
walls. In the first phase, torsional behaviour of the walls is
found to have significant influences on the wall performance. These
observations from the first phase of the study have been used to
improve the instrumentation and test set-up in the second phase.
The study shows that the repair and retrofit method using carbon
fibre sheets is effective in recovering the initial elastic stiffness
of previously damaged wall specimens and in increasing the yield
load and ultimate load carrying capacities of both repaired and retrofitted