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What is sagging bending moment?

Updated: 4/28/2022
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Sagging bending moment causes the beam to bend in a way to make concavity downward (cup-shaped) and it results in developing tensile stress in lower half of the beam x-section.

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Q: What is sagging bending moment?
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What is absolute maximum bending moment?

bending moment varies with the distance & the load carried by the beam. And also there is a hogging behavior and a sagging behavior occurs in the beam. According to the sign convention hogging and sagging bears opposite signs.(- & +). So if we are asked to find the maximum bending moment whether it is sagging or hogging we should consider the maximum value without considering the sign. That value is called maximum absolute bending moment.


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What do you mean bu equivalent shear force and equivalent bending moment?

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What is the difference between deflection and bending?

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What will be the shear force when bending moment is constant?

On SFD's and BMD's: The shear force will be 0, the shear force is the derivative of the bending moment at a point on shear force and bending moment diagrams. Otherwise: It depends on the loading.


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when a moment is applied in a structure the element bend


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