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Design a Bridge: Truss Structure- Maximum Total Load of 1MN- MATLAB Modelling- Report Writing Assignment
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Internal Code: IAH333
The structure must display adequate stability (including internal stability); stiffness and strength.
Modelling:
The load should be modelled as a number of point loads applied at regular intervals along the bridge length; distributed loading over bridge elements is not required. Only truss (i.e. bar/rod) elements may be used. The problem may be assumed to be two-dimensional.
Methods and verification:
It is expected that you use the finite element method to model the bridge. The analysis should include your own FEA code (written as a Matlab program), together with an ABAQUS validation of the code. Basics of programming with Matlab and the steps involved in the construction of a finite element programme for static truss structures will be covered in future tutorials. The program should be parametric: It should be possible to test different designs with the same programme.
Design:
The final design must be justified. The design will be judged according to criteria of satisfactory performance, economy, lack of structural redundancy and appropriate safety factors. Extra credit may be given for consideration of any additional factors appropriate for the design, including practical issues.
Report:
Your final report should contain a clear description and justification of your design choices, full listing and explanation of the code.programme results and the ABAQUS pre and post processed plots for modal verification.
Report Writing Assignment:
Task: Using a truss structure, design a bridge to link two position 150 m apart with a height of 50m above the ground. The bridge should be capable of sustaining a maximum total load of 1MN while sustaining a maximum vertical displacement of 30mm
The structure must display adequate stability (including internal stability); stiffness and strength.
Modelling:
The load should be modelled as a number of point loads applied at regular intervals along the bridge length; distributed loading over bridge elements is not required. Only truss (i.e. bar/rod) elements may be used. The problem may be assumed to be two-dimensional.
Methods and verification:
It is expected that you use the finite element method to model the bridge. The analysis should include your own FEA code (written as a Matlab program), together with an ABAQUS validation of the code. Basics of programming with Matlab and the steps involved in the construction of a finite element programme for static truss structures will be covered in future tutorials. The program should be parametric: It should be possible to test different designs with the same programme.
Design:
The final design must be justified. The design will be judged according to criteria of satisfactory performance, economy, lack of structural redundancy and appropriate safety factors. Extra credit may be given for consideration of any additional factors appropriate for the design, including practical issues.
Report:
Your final report should contain a clear description and justification of your design choices, full listing and explanation of the code.programme results and the ABAQUS pre and post processed plots for modal verification.