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There are important points that will used:
The following Australian Standards must be used in design and modelling of the footbridge:
1. AS/NZS 1170.0-2002 ?Structural design actions. Part 0: General principles?
2. AS/NZS 1170.1-2002 ?Structural design actions. Part 1: Permanent, imposed and other actions?
3. AS/NZS 1170.2-2002 ?Structural design actions. Part 2: Wind actions?
4. AS 4100-1998 ?Steel Structures?
Assumptions and Notes:
1. You will be primarily concerned with modelling the structural steel elements of the walkway structure using Strand7 finite element software.
2. The steel member schedule is given on Drawing S02.
3. The roof is covered with protective mesh. Assume weight of 20 kg/m2.
4. The scale of 1:100 on the engineering drawings of the roof plan (1:50 for elevations) applies to an original large drawing. A different scale will apply when considering the engineering drawings printed on A3 or A4 paper.
5. Since you have been asked to do a design check (or evaluation), the member sizes and all dimensions are to be the same as those in the drawings.
6. Assume material for structural steel components to be Grade 350 with yield stress fy = 350 MPa. The steel bracing rods have the yield stress of 250 MPa.
7. Design checks of critical structural elements must comply with the requirements in AS 4100.
The following steps are recommended in order to successfully complete this assignment:
PART A Layout and Loading:
1. Prepare sketches showing the layout of the structure including its member sizes and dimensions.
2. Determine and calculate the design actions (loads) on the structure from all cases. Use diagrams to indicate the magnitude and directions of these actions (separate diagrams for dead loads, live loads, wind etc).
3. You need only consider the following load cases:
a) Self-weight (SW) of structural and non-structural elements of the roof
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b) Live Load (LL) on the roof of 0.25 kPa (should be applied as UDL to the main beams or the rafters)
c) Wind Load (WL) uplift on the roof of 0.35 kPa (upward) (should be applied as UDL on the main beams or the rafters)
d) Lateral Wind (LW) (should be applied as UDL of 0.3 kN/m on the columns)
e) Temperature Differential (TD) of 10 degrees Celsius.
4. Prepare for the structural analysis by establishing the appropriate combinations of actions for strength and serviceability limit.
PART B Finite Element Modelling and Linear Static Analysis
1. Develop the analysis model using Strand7 software. Use appropriate types of elements, material properties, element sizes and orientation. It is strongly recommended to use Groups according to the Members Schedule (e.g., Main beam, Rafter, Bracing, Columns, etc) to facilitate handling of various modelling tasks.
2. In Strand7, prepare three separate load cases for Dead Loads, Pedestrian Load, and Wind Load. Before performing the static analysis run, set up the load combinations (Results ? Linear Load Case Combinations) required in the analysis.
3. Interpret the results. Provide explanations of your findings. Provide design check of stresses in several most stressed elements in tension and compression.
4. Prepare separate load cases for train collision loads applied to the piers next to the railway line. Perform static analysis and interpret the results.
5. Each part of the analysis (loads, modelling, results, etc) must be properly documented.
Important Note: i have drawing attachments,, it is very important.
Thanks
i sent files to you and i like inform you that it is better for me to attach some format or figures by using Strand 7
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