Jraw the influence line for the moment at B in the girder, and draw the influence line for the shear in panel CD of the girder. Determine the maximum positive moment in the girder at B and determine the maximum positive shear in panel CD due to a uniform live load of 6 kN/m acting, a uniform dead load 1.5 kN/m and a concentrated live load 40 kN on the top beams.

Jraw the influence line for the moment at B in the girder, and draw the influence line for the shear in panel CD of the girder. Determine the maximum positive moment in the girder at B and determine the maximum positive shear in panel CD due to a uniform live load of 6 kN/m acting, a uniform dead load 1.5 kN/m and a concentrated live load 40 kN on the top beams.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

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.

Question

Jraw the influence line for the moment at B in the girder, and draw the influence line for the shear in
panel CD of the girder. Determine the maximum positive moment in the girder at B and determine the
maximum positive shear in panel CD due to a uniform live load of 6 kN/m acting, a uniform dead load
1.5 kN/m and a concentrated live load 40 kN on the top beams.
2 m
MB
VCD
2 m
B
4 m
F
3m 1m D
4 m
1
4 m

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