Abstract:
Inadequate design and construction, reinforcing steel corrosion, and deterioration due to variety
of aggressive environmental effects all create a need for structural strengthening of concrete.
Furthermore, recent earthquakes in Pakistan have promoted an urgency to upgrade seismic
deficient structures to reduce casualties and damages.
Some recently developed techniques can play vital role in structural repairs, seismic
strengthening and retrofitting of existing structures whether damaged or undamaged. Selection of
right materials, techniques and procedures to be employed for a given structure has been major
challenge. The selection of techniques to be used depends on many aspects that may be viewed
from different perspective i.e. requirement and availability of financial resources, applicability
and suitability of material for the repair of damaged structures.
Significant amount of research work has been carried out in recent years to develop various
strengthening and rehabilitation techniques to improve the seismic performance of the structures.
Seismic retrofit with FRP (Fiber Reinforced Polymers) materials has gain notable acceptance
from civil engineering community in recent years as the FRP can help to cure many ills that
beset concrete. A thorough literature review will be carried out to determine strength and
ductility of column using different retrofitting techniques namely FRP, steel jackets, concrete
jackets and Ferrocement. The effective techniques will be highlighted for retrofitting of
structures in seismic and non-seismic areas
