The reinforcement of short pillars was required mainly because after the earthquake exist multiple faults in these elements. Mainly in walls or pillars.
The failure is mainly related to a diagonal cracking and degradation of stiffness (short pillars Antigona photo). In general this is a type of failure very dangerous because it is fragile, that is, without deformation capability and a result of loss of strength of the very high component, specifically in the central part of the element where both cracks is bound and can cause even a depletion of elements.
The low amount of steel present in these short columns is possible to cover with carbon fiber, both transversely and longitudinally and may even develop an anchorage elements allow effort is distributed better over the entire element.