Abstract

In this paper a new mechanical model for the transfer of unbalanced moment and shear in exterior wide band beam-column connections is proposed. It is based on the crack formation pattern and the mobilization of struts-and ties in the vicinity of the column. The critical section of the wide beam is divided into flexural and torsional elements and the unbalanced moment is divided between these elements as bending moment and torque. Shear force is also divided among these elements in proportion to the shear area of each element. A linear interaction between the shear force and torque carried by the torsional elements and their corresponding ultimate capacities is assumed.

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