Moment and Shear Redistribution in Two-Span Continuous Reinforced Concrete Beams*

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Title: Moment and Shear Redistribution in Two-Span Continuous Reinforced Concrete Beams*

Author(s): George C. Ernst

Publication: Journal Proceedings

Volume: 55

Issue: 11

Appears on pages(s): 573-589

Keywords: no keywords

Date: 11/1/1958

Abstract:
Twenty-Four Two-Span Continuous Beams were tested to determine the manner and degree of moment and shear redistribution after yielding of the first critical section. Support displacement conditions were selected to provide severe redistribution requirements. Manner and degree of moment and shear redistribution were essentially the same for all beams, with redistribution beginning with the start of steel yield at the first critical section and becoming practically complete upon initial yielding of the final critical section. Transverse ties designed to resist all the shear at plastic collapse provided adequate protection against diagonal tension failure with one exception. Concentrated plastic rotation values indicate a sufficient capacity for the attainment of crushing moments at all critical sections for the steel ratios and support displacements of these tests. The amount available for redistribution may become limited by high steel ratios.