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This paper proposes new coefficients for design bending moments for interior reinforced concrete flat plates. These design coefficients are safe for strength and serviceability and are calculated using Hillerborg's advanced strip method design approach and finite-element method. The Hillerborg-Wood-Armer rules were used to convert field moments to design moments. The paper also introduced graphs. These can be used to determine the length of the top reinforcement in an interior flat plate. The findings are the only available solution for designing flat plates with aspect ratios higher than 2.0. [ABSTRACT FROM AUTHOR]

This paper presents a study on the strength and behavior of cold-formed steel Z-sections with simple and complex stiffeners subjected to major axis bending. The study involved both experimental and numerical investigations, in which a series of specimens were examined. All specimens were failed by the combined mode of shear and moment. The results from the investigations were analyzed and compared with the combined moment and shear strengths predicted by international design rules. The suitability of the design rules in predicting the combined capacity of Z-section with complex stiffeners was assessed through a reliability analysis. [ABSTRACT FROM AUTHOR]