Perform Static Analysis

Mesh Generation:

Meshing divides beam members into smaller finite elements to enable accurate computation of internal forces and displacements during static analysis.

1. Open the Mesh tool from the ribbon and select No. of Divisions.
2. Select the required beam members from the list or click Select All to apply uniform meshing.
3. Enter the desired Number of Elements on Member.
4. Click Update to apply the mesh settings.
5. Click OK to finalize meshing.

Click Mesh command on the ribbonbar to mesh the structure.

In the post graphics window , right click to display the context menu. select options to show nodes and elements.

Static Analysis:

Static analysis options are defined through the Properties window and control load handling, design codes,reference temperature , and solver performance.

1. Add a new Static Analysis from the ribbon.
2. Configure parameters in the Properties window.

Load Case Definition:

Load case definition involves assigning specific loads to a named loading scenario. Each load case is analyzed independently and later used to generate design load combinations for static analysis.

1. In the Model Outline, expand Analysis → Static and click on Load Cases.
2. From the load case dropdown, in the loadcase dialogbox, select the required load case type such as Dead, Live, Wind, Earthquake, or Temperature.
3. Select one or more loads from the Available Loads list and click the Add button. The selected loads will appear under the Selected Loads column for the active load case.
4. Review the assigned loads and click Close to save the load case. The load case will now appear under Analysis → Load Cases in the model tree.

Load Combinations:

Load combinations evaluate the structure under critical combinations of multiple load cases as prescribed by the selected design code. IMDAS automatically generates these combinations based on the chosen code.

1. In the Model Outline, expand Analysis → Static and click on Load Combinations.
2. Click Load Case → Define Load Combinations from the ribbon toolbar to open the load combination dialog.
3. Select the material type and appropriate design code (e.g., IS 800:2007 for steel structures). IMDAS automatically prepares standard load combinations as per the selected code.
4. Click Add to generate combinations. Review the generated combinations and click Close to save them.

Custom Load Combinations:

Custom load combinations allow manual definition of specific load case combinations and factors for special design or verification requirements.

1. In the Model Outline, expand Analysis → Static and click on Load Combinations.
2. Click Load Case → Define Load Combinations from the ribbon toolbar to open the load combination dialog.
3. Enable the Custom Load Combinations option to allow manual definition of combinations.
4. Enter a descriptive name that clearly represents the loading scenario.
5. Select each load case, specify its load factor, and click Add. Repeat until the combination is complete.
6. Click Add to create the custom load combination.
7. Click Add to generate combinations and click Close.

Solve Static Analysis:

Solving the static analysis evaluates the structural response under defined loads and combinations by assembling and solving the global stiffness matrix.

1. Static analysis solve command from the ribbon toolbar.
2. Verify Model : Confirm that meshing, load cases, load combinations, supports, and member releases are properly defined before starting the analysis.
3. Start Solver : Click the Solve button from the Analysis ribbon to initiate static analysis.
4. Review Solver Messages for warnings or errors reported in deck.mess file in the analysis folder. Address any reported issues before continuing.
5. Analysis Complete : Once the solution completes successfully, analysis results are stored and made available for post-processing and design checks.

Post Process Analysis Results:

Nodal Results:

1. Select Solution under Static-1.
2. Click Nodal from the ribbon toolbar.
3. Choose result type:
   • List Reactions
   • Plot Reactions
   • List Displacements
   • Plot Displacements
   • List Forces

Member Results:

1. Select Solution under Static-1.
2. Click Member from the ribbon toolbar.
3. Choose result type:
   • List Forces – Displays numerical values of axial force, shear force, bending moment, and torsion.
   • Plot Forces – Displays graphical force diagrams along the member length.
   • List Stresses – Displays calculated stresses based on section properties.
   • Mode Participation Factors – Applicable mainly for dynamic analysis.