5.3 and 5.4: Draw the influence lines for the forces in themembers identified by an "x" of the truss shown. Live loadsare transmittedto the bottom chords of the trusses.JmH8 m12 mBDEO6 @ 16 m = 96 mFigure P5.3(FCD =-1.6 at A; 0 at C, D, E, F, and GFeI = -1.8 at A; 0 at C and E; -0.5 at D; 1 at G%3DFDI = 1.494 at A; 0 at C and E; 0.534 at D; -1.067 at G

Influence line for the force in member DE. Find the influence ordinate for the force in member DE at…

5.3 and 5.4: Draw the influence lines for the forces in the members identified by an "x" of the truss shown. Live loads are transmitted to the bottom chords of the trusses. + H B X X J X D 6 @ 16 m E 96 m Figure P5.3 F (FCD= -1.6 at A; 0 at C, D, E, F, and G FCI= -1.8 at A; 0 at C and E; -0.5 at D; I at G FDI = 1.494 at A; 0 at C and E; 0.534 at D; -1.067 at G m 8 m 12 m

5.3 and 5.4: Draw the influence lines for the forces in the members identified by an "x" of the truss shown. Live loads are transmitted to the bottom chords of the trusses. + H B X X J X D 6 @ 16 m E 96 m Figure P5.3 F (FCD= -1.6 at A; 0 at C, D, E, F, and G FCI= -1.8 at A; 0 at C and E; -0.5 at D; I at G FDI = 1.494 at A; 0 at C and E; 0.534 at D; -1.067 at G m 8 m 12 m

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

5.3 and 5.4: Draw the influence lines for the forces in the
members identified by an "x" of the truss shown. Live loads
are transmittedto the bottom chords of the trusses.
J
m
H
8 m
12 m
B
D
EO
6 @ 16 m = 96 m
Figure P5.3
(FCD =-1.6 at A; 0 at C, D, E, F, and G
FeI = -1.8 at A; 0 at C and E; -0.5 at D; 1 at G
%3D
FDI = 1.494 at A; 0 at C and E; 0.534 at D; -1.067 at G

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Step 1: Draw the influence line diagram for ordinate for the force in member DE.

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Step 2: Draw the influence line diagram for ordinate for the force in member CG.

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Step 3: Draw the influence line diagram for ordinate for the force in member GH.

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Step 4: Draw the influence line diagram for ordinate for the force in member BC.

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5.3 and 5.4: Draw the influence lines for the forces in the members identified by an "x" of the truss shown. Live loads are transmittedto the bottom chords of the trusses. J m H 8 m 12 m B D EO 6 @ 16 m = 96 m Figure P5.3 (FCD =-1.6 at A; 0 at C, D, E, F, and G FeI = -1.8 at A; 0 at C and E; -0.5 at D; 1 at G %3D FDI = 1.494 at A; 0 at C and E; 0.534 at D; -1.067 at G
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