Study of Seismic Capacity of Masonry Infilled Reinforced Concrete Frames Considering the Influence of Frame Strength
Unreinforced masonry infilled-RC frames are widely used in many developing countries. Even though the influence of the masonry walls on the behavior of structure was recognized from the experience of past earthquake disasters, but many practicing engineers still assume that the infill walls are non-structural walls due to incomplete knowledge of the behavior of such structures. In this paper, an experimental study of two ½ scale specimens with different RC frames and masonry infill walls were tested using a static cyclic loading protocol. The main parameter was the influence of changing the RC frame strength on masonry infill seismic capacity. The results showed that shear strength and deformation capacity of masonry infill greatly improved by increasing the strength of boundary frame. The investigation of strength, ductility and initial stiffness based on experimental results and comparative study with existing methods showed large variations between several methods commonly used to assess the seismic capacity of masonry infill.
KeywordsReinforced concrete buildings Masonry infill Seismic capacity Boundary frame strength
The study presented in this article was sponsored by the Science and Technology Research Partnership for Sustainable Development (SATREPS) project (Bangladesh, 2015 project headed by Professor Nakano Yoshiaki, University of Tokyo) and it’s gratefully acknowledged. Opinions expressed in this article are those of the authors, and do not necessarily represent those of the SATREPS project.
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