Behaviour of Concrete Masonry Infill - Steel Frame Structuresby J. L. Dawe, MASCE,
C. K. Seah, MASCE,
Abstract: Twenty-eight masonry shear panels infilled in steel frames were tested to ultimate strength under in-plane, horizontal loading applied at roof level. The parameters investigated in this test series included interface conditions between panel edges and frame, column-to-panel ties, and panel reinforcements. Additionally, nine large-scale concrete masonry infilled panels were tested to destruction under uniformly distributed lateral pressure applied incrementally. Load-deformation measurements of the infill showed linear behaviour prior to first cracking. Non-linear behaviour of infill caused by panel cracking and arching action was prominent in the post-cracking range. Arching effects resulted in load significantly higher than that predicted with conventional methods. In parallel with the testing program, a computer based analytical technique was developed to predict arching strength of masonry panels infilled within steel frames. The technique was a fracture line analysis modified to account for arching action of the panel confined within a flexible steel frame. The analytical technique was found to correlate well with experimental results.
Subject Headings: Steel frames | Panels (structural) | Masonry | Concrete frames | Shear strength | Steel structures | Reinforced concrete
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