It is not uncommon to observe failures in highway bridges. These failures are attributed to construction problems like inappropriate backfill compaction, construction joint, poor material quality, and contraction joint in masonry abutment besides design problems. Abutment is the main structural component of bridge structure and several types of failure or cracks occur in this component of bridge. It is important to investigate the main cause of masonry abutment crack to avoid the consequences, which are damage of bridge and high maintenance cost. To increase the masonry working life, it is required to repair local damages with Fiber Reinforced Polymer (FRP). There are limited previous studies that investigate the main cause of the crack and specify the strengthening method of masonry abutment. And also, the effective and recent strengthening methods of CFRP with various fiber orientations, configuration, position, and the number of layers of CFRP composite materials were not examined for the strengthening of masonry abutment failure. This thesis work numerically investigates the possible causes of T-girder bridge masonry abutment failure and proposes the use of carbon fiber reinforced polymer (CFRP) composite for retrofitting and extending its life span using case study area of woremet T-girder bridge cracked masonry abutment, which is found 35Km far from Bahir Dar city in southwest direction. The experimental results reported in the literature are used for validation analysis to ensure accuracy of developed finite element models and further investigations are performed on possible causes of failure and method of strengthening with CFRP to upgrade the woremet T-girder bridge masonry abutment. The analysis result shows that the differential settlement has considerable effects and reduces the vertical load resistance capacity of masonry abutment by 13 - 55.12%. The crack is formed by 3L/4 right side of abutment settlement which is more similar to the woremet T- girder bridge masonry abutment crack. The abutment strengthened with CFRP of 90 orientation, three number of layers and 90°,90°& 90° configuration is proposed for simulated crack pattern. Keywords: Carbon Fiber Reinforced Polymer (CFRP), Masonry Abutment, Woremet T-Girder Bridge