Refer to the frame shown . a. Draw the influence line for the vertical reaction at A.  b. Draw the influence line for the moment at D.  c. Determine the length of a 8kN/m uniformly  distributed load that will put column AC in tension.

Q: From the truss shown, determine the reaction at roller support.

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Q: The designed to withstand a uniformly distributed live load of 60 kN/m, a dead load of 20 kN/m, and…

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Q: Illustrate the Influence Line and calculate the maximum positive live shear at point C in kN…

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Q: Use A992 steel and select a W-shape for a simply supported beam with a span of 30 feet and laterally…

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Q: 1 Determine the maximum positive moment created at point B shown in Figure due to the moving loads…

A: Ordinate of ILD for moment at section B=aL - aL = 25 - 25 = 65unitSlope of ILD for BC,= 653 =…

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Q: solve for the internal forces at the midspan

A: Consider the figure,

Influence Lines

The graphs that show the variation of a function at a specific point on a beam or truss due to a unit load placed at any point along the structure are known as influence lines in engineering. Some common functions that are studied with influence lines are shear, moment, and deflection. In designing beams and trusses, it is important to use influence lines in structures where loads would move along their span such as bridges, crane rails, conveyor belts, floor girders, etc. The influence lines help to study where a load will create the maximum effect for any of the functions.