This paper presents a new method to identify the ultimate failure mode of reinforced concrete (RC) frames due to the presence of masonry infill walls. The proposed method is based on simple geometry, reinforcement ratios and material properties of the elements involved in the frame-wall assembly. A simple engineering tool, expressed in terms of infill wall-to-RC frame stiffness and strength ratios, is developed to estimate whether the ultimate failure mode that would evolve during strong earthquake ground shaking in the infilled RC frame is brittle or ductile. The brittle failure mode, that is, shear failure in columns, should be avoided in design and mitigated in existing structures. The method checks various possible failure mechanisms including those that may develop depending on how the infill wall may fail during strong shaking such as the formation of captive columns. Data from twenty three laboratory specimens tested by other researchers are used in developing the engineering tool.
Allouzi, Rabab and Irfanoglu, Ayhan
"Failure Mode Identification of Masonry Infilled RC Frames,"
Emirates Journal for Engineering Research: Vol. 24:
1, Article 1.
Available at: https://scholarworks.uaeu.ac.ae/ejer/vol24/iss1/1