【Daily Question】Question from Issue 20151031

The upper limit value in the applicable conditions of the shear capacity formula for the inclined section of a beam – the minimum section size – is intended to prevent shear failure. ( Wrong )

The upper limit value in the applicable conditions of the shear capacity formula for the inclined section of a beam – the minimum section size – is intended to prevent shear failure. (Yes)

The upper limit value in the applicable conditions of the shear capacity formula for the inclined section of a beam – the minimum section size – is intended to prevent shear failure. (Incorrect) The limits on cross-sectional dimensions and the minimum stirrup ratio serve to prevent shear compression and shear tension failure, respectively. Upper limit: The minimum cross-sectional dimension – when shear compression failure occurs, the concrete in the beam’s web is crushed while the stirrups do not yield; the shear capacity in this case depends mainly on the width of the beam’s web, its height, and the strength of the concrete. Therefore, as long as the cross-sectional dimensions of the member are kept from being too small, shear compression failure can be prevented. The lower limits refer to the minimum stirrup ratio and the maximum spacing between stirrups; when the stirrup ratio is too low and the spacing between stirrups is too large, the occurrence of diagonal cracks may lead to the rupture of the stirrups, resulting in diagonal tensile failure. Furthermore, an excessively small diameter of the stirrups also cannot ensure the stiffness of the steel reinforcement framework. What is the essential difference between large and small eccentric compressive failure? What are the boundary conditions for its discrimination? Whether the tensile steel bars yield at the time of cross-sectional failure, that is, whether the strain in the tensile steel bars exceeds the yield strain value; when the tensile steel bars yield, the edge of the compressive zone

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The upper limit value in the applicable conditions of the shear capacity formula for the inclined section of a beam – the minimum section size – is intended to prevent shear failure. (Mistake)

The upper limit value in the applicable conditions of the shear capacity formula for the inclined section of a beam – the minimum section size – is intended to prevent shear failure. ( X )

The upper limit value in the applicable conditions of the shear capacity formula for the inclined section of a beam – the minimum section size – is intended to prevent shear failure. X

The upper limit value in the applicable conditions of the shear capacity formula for the inclined section of a beam – the minimum section size – is intended to prevent shear failure. (×)

The upper limit value in the applicable conditions of the shear capacity formula for the inclined section of a beam – the minimum section size – is intended to prevent shear failure. ( Wrong