Beam‐Column Moment Connections for Composite Frames: Part 2

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Abstract
This is the second of two companion papers addressing the behavior and design of moment connections between structural steel beams and reinforced concrete or composite columns. Due to the traditional separation of steel and concrete design, there is currently a need for guidelines to design such connections. In this paper, a design model and recommendations are presented for detailing and calculating the nominal strength for composite beam‐column joints. The design model is based on two limiting modes of failure: panel shear and bearing of the steel flanges against the concrete. Panel shear strength reflects enhancement achieved through mobilization of the reinforced concrete panel using vertical stiffener (bearing) plates and steel erection columns attached to the steel beam. Bearing strength can be increased by vertical joint reinforcement attached to the steel beam. In the recommendations, detailing considerations for the structural steel and reinforcing bars are included. Finally, calculated results b...

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