Challenge 4

Ans.

Aim and Introduction:-

• The aim of this challenge is to create the model as per the given information and data.
• Then to analyse the structure for the results.ults with each other.

Staad Model:-

• A four girder system is to be created .
• First of all a node is created and then the width of the deck slab has been created with 2m spacing each.
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• Then the over hang portion of the bridge has been created at -ve X-direction at a distance of 0.7m as given.
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• Then accordingly the whole structure has been created in both the sides.
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• Then diffrent type of Supports considering the functional behavoiur of bearings for the model need to be created.
  • The support releasing the Mx, My & Mz has been created.
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  • The support releasing the Mx, My, Mz & Fx has been created.
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  • The support releasing the Mx, My, Mz & Fz has been created.
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  • The support releasing the Mx, My, Mz, Fx & Fz has been created.
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  • The supports to the respective bearing positions has been assigned.
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• Material Property
  • The material property as given has been created.
  • For End Section
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  • For Mid section
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  • Material property for cross girder has been created as dummy member.
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  • The properties has been assigned to the structure as described.
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• Loads & Definations
  • Vehicle definations created.
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  • Self weight has been defined with a factor of -1 & applied to the whole structure.
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  • Different loads as SIDL for wearing coat has been defined and assigned to the intermediate girders
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  • SIDL for crash barrier loading has been created and assigned to the end girders.
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  • Moment due to SIDL eccentric loading is to be applied. Moments at the intermediate girders has been applied in both the global x direction.
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  • vehicles Loads has been generated considering the length of the boggie and the length of the span. Also considering the intervals at 0.25.
  • Two trains is being considered as per the with of the structure.
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• Material Property
  • New material for M60 and dummy member has been defind with the following inputs.
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  • Property M60 and dummy has been assigned to the model.
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• The model has been analyzed and results with 0 error.
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• Results
  • Max deflection of the struture with summary sheet.
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  • Reactions with summary sheet.
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  • Value of Mz with summary sheet.
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  • Value of Mx with summary Sheet.
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  • Value of Fy with summary sheet.
    •