‘real-life’ structures

This Project requires you to analyse two ‘real-life’ structures using the knowledge you have gained in Solid Mechanics so far.
You are required to form a group of 4. (Groups of2,3 or5,6 will generally not be accepted). Your group will undertake to answer the
following:

1. Identify a bridge OR roofthat is supported by a planartruss system (2D) and,

a) Take a photo(s) ofthe truss system and

ensure you ascertain reasonably accurate dimensions of all members.

b) Estimate the external loads and hence support conditions on the

truss system (you can assume a statically determinate situation).

c) Calculate the tension and compression forces in each member using

either method ofjoints OR method of sections.

2. Identify a beam (from a bridge underpass OR building OR other) that supports a

significant load.

E) Take a photo(s) ofthe beam element and ensure you ascertain reasonably accurate dimensions ofthe beam element
Estimate the external loads and hence support conditions on the beam element

c) Draw an accurate Shear Force Diagram (SFD) and Bending

Moment Diagram (BMD) forthe whole beam.

3. Using the constructed SFD and BMD diagrams,

a) Calculate the elastic bending stress

distribution acrossthe critical section.

b) Calculate the shear stress distribution acrossthe critical section.

4. For your chosen

beam calculate the maximum deflection using either,

a) The Elastic curve method or b) The Macaulay method.

In a bound report you need to show all your calculations, including explanation of how you worked out external loads on the member. You should have headings and
subheadings and include an introduction and discussion ofthe selected structures.

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