Discontinuity of the Strength in Bending and Shear of Reinforced Beams


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Title: Discontinuity of the Strength in Bending and Shear of Reinforced Beams

Author(s): Milik Tichy

Publication: Journal Proceedings

Volume: 67

Issue: 3

Appears on pages(s): 249-252

Keywords: beams (supports) ; bending; cracking (fracturing) ; flexural strength; reinforced concrete; shear properties; shear strength; stirrups; ultimate strength.

Date: 3/1/1970

Papers analyzing the ultimate strength of beams subject to bending and shear treat the shear reinforcement as a continuous entity. However, the shear reinforcement is discrete which has an influence on the ultimate behavior of the beam. Assuming a model of the shear-bending strength, it can be shown that the inclination of the shear crack and also the spacing of shear reinforcement are important factors. The inclination of shear crack is a random variable which is only partially dependent on conditions at ultimate load. The analysis of a set of "computer beams" has shown interesting discontinuities of the ratio Mus/Mu (where Mus is the ultimate moment at shear-bending failure and Mu is the ultimate moment at pure bending) when plotted towards the shear span ratio M/Vd1.