Numerical evaluation of Masonry-Infill Frames: Analysis of lateral strength and failure modes on meso scale

This study investigated the failure modes of masonry-infilled frames, a common structural system in modern construction. By analyzing 6,496 frames and considering variables such as the height-to-width ratio and compressive strength of the masonry prism and the plastic moment capacity of the section of the frame, equations were derived for various failure modes of masonry-infilled frames. The study found that the lateral strength of masonry-infilled frames with a height-to-width ratio ranging from 0.2 to 1.2 is primarily dependent on the compressive strength of the masonry prism. The derived equations showed good agreement with previously established correlations, indicating their accuracy and reliability. These findings provide valuable insights into the lateral strength of infill masonry frames and can assist in their design and assessment. However, it is important to note that the study was limited to analyzing the behavior of the frames under static loading conditions and within a specific height-to-width ratio range. Overall, this study contributes to the understanding of the lateral strength of infill masonry frames and offers a practical tool for their design and evaluation.