Abstract
This paper presents an in-depth structural engineering and structural reliability analysis of concrete masonry beams. The ductile response of masonry beams was studied in detail. A limit-state design methodology for reinforced-concrete masonry beams is presented in this paper based on the principles of structural reliability. Recommended values of capacity-reduction factors were developed that explicitly account the design safety of the limit states. The reinforcing steel bars are uniformly distributed throughout the beam section. Three different ductility definitions (strain, curvature, and displacement) were derived and presented. This paper also formulated a structural reliability analysis method to establish limitations on the quantity of steel in masonry beams. Equations were derived for the expected capacity at yield and ultimate limit states. An important part of this paper was to quantify the uncertainty in the design capacity of concrete masonry beams of different limit states resulting from the ...
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