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Shear

The document discusses plotting the shear force influence line of a simply supported beam. It first outlines the objectives of plotting the shear force influence line and verifying its use. It then provides an introduction to influence lines and how they are used to solve problems with moving loads on beams. The theory section defines the shear influence line and provides equations 1 and 2 to calculate the shear force for a unit load moving between 0 and a, and a and b on the beam. The conclusion states that for part 1, the experimental and theoretical shear force values differed, but the shear force increased as the load moved nearer to the cut section. For part 2, it confirms that influence lines can be used to calculate shear force at a cut section, and

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Azrin Yusop
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20 views1 page

Shear

The document discusses plotting the shear force influence line of a simply supported beam. It first outlines the objectives of plotting the shear force influence line and verifying its use. It then provides an introduction to influence lines and how they are used to solve problems with moving loads on beams. The theory section defines the shear influence line and provides equations 1 and 2 to calculate the shear force for a unit load moving between 0 and a, and a and b on the beam. The conclusion states that for part 1, the experimental and theoretical shear force values differed, but the shear force increased as the load moved nearer to the cut section. For part 2, it confirms that influence lines can be used to calculate shear force at a cut section, and

Uploaded by

Azrin Yusop
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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1.

0 OBJECTIVE

1.1 Part 1: To plot Shear force influence line.


1.2 Part 2: To verify the use of a shear force influence on a simply supported beam

2.0 INTRODUCTION

Moving loads on beams are common features of design. Many road bridges are constructed from
beam, and as such have to be designed to carry a knife edge load, or a string of wheel loads, or a
uniformly distributed load, or perhaps the worst combination of all three. The method of solving
the problem is to use influence lines.

3.0 THEORY

Defination: Shear influence line is defined as a line representing the changes in


shear force at a section of a beam when a unit load moves on the beam Part 1: This Experiment
examines how shear force varies at a cut section as a unit load moves from one end to another
(see Figure 1). From the diagram, shear force influence line equation can be written.

For 0 x a
a shear line is given by:
Sy = x/ L (1)

For a x b
a shear line is given by:
Sy = 1 x L. (2)

DISCUSSION

CONCLUSION
Part 1: From the experiment, we know that the value for the experimental and
theoretical value is totally difference. From the graph it shows totally difference result between
theoretical and experimental result. Based on the result, the values of shear force at cut section
(N) increases when a load moves nearer towards the cut.

Part 2: From the experiment, its shows that the location is the one of the causes for the
differences between the value. We should know that influence line can be used to calculate the shear
force at the cut section.

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