代写EA50JG Offshore Structural Design 10 Computational modelling and design

EA50JG Offshore Structural Design – Jacket Platforms

10       Computational modelling and design

By way of finite element analysis using SAP2000 package the jacket platform. introduced in Lecture 4 can be simulated through the steps illustrated as follows:

Modelling and analysis phase

Step 1. Defining the grid lines

 

Step 2. Defining the section properties for chords and braces

 

Step 3. Defining the auto selection lists for the chords and braces

 

Step 4. Drawing the chords, plan braces, face braces and the representative tope side structure members

 

Step 5. Drawing the conductors using replication technique

 

Step 6. Drawing the conductor box at plan elevations by editing and adding members

 

Step 7. Replicating the front row of the conductors

 

Step 8. Incorporating the leg batters by modifying the coordinates at the plan elevations

 

Step 9. Pinned supports at the jacket base

 

Step 10. Defining area at the top deck level

 

Step 11. Defining dead, live and wave load patterns

 

Step 12. Assigning dead and live area loads at the top deck level

 

Step 13. Assigning wave, current and wind load characteristics following SAP2000 documents