Seismic Strengthening of Infilled RC Frames by CFRP

Abstract eng:
A series of tests were performed for investigating the strengthening of masonry infill walls of poorly designed RC frame specimens by CFRP fabrics. The main objective of this experimental work was to evaluate the contribution of CFRP applied on infill walls over selected parameters. The first part included diagonal tension tests of 28 masonry wall panel specimens. These tests were conducted in order to observe the effects of different CFRP types and applications over inital stiffness, shear strength and failure modes. At the second part of experimental work, five ½ scaled one story-one bay reinforced concrete frame specimens were tested under cyclic in-plane lateral loads. One bare frame specimen and one infilled frame specimen were the reference frames. The other three specimens were strengthened with different CFRP application types and connection details. Lateral load-top displacement hysteresis curves of specimens were evaluated in terms of lateral load capacity, initial stiffness and energy dissipation. It was concluded that strengthening of infill walls by CFRP as done in this study were effective on increasing lateral load carrying capacity and initial stiffness of infilled RC frame specimens.

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