Overview
Beam / Wall Stiffness Auto Tuner is a plugin that automatically adjusts the Element Stiffness Factor of selected beam elements and the Wall Stiffness Factor of selected wall elements.
Based on user-defined criteria, the plugin repeatedly performs analysis and design checks. After each iteration, it evaluates whether the design check ratio of each member satisfies the specified target ratio and updates the Stiffness Factor according to the predefined stiffness reduction sequence.
This automated process reduces the repetitive work of manually adjusting the Stiffness Factors of beams and walls and rerunning the analysis. The final stiffness values can also be reviewed directly in the MIDAS model.
Development Environment
- MIDAS GEN NX 2026 v2.2
Design Code
- KDS 41 20 2022 RC
- Beam evaluation: Based on Beam Check results
- Wall evaluation: Based on Wall Design results
Key Features
- Batch Processing for Beams and Walls: Beams and walls can be included in a single tuning process, allowing the plugin to automatically adjust the Stiffness Factors and perform iterative analyses for both member types.
- Automated Iterative Analysis: Based on the user-defined target ratio, the plugin automatically repeats the analysis, retrieves the design results, and updates the Stiffness Factors.
- Model-Based Element Selection: Members selected in MIDAS GEN NX can be directly synchronized with the plugin.
- Customizable Stiffness Reduction Sequence: Users can define the stiffness reduction interval and add or remove specific values to configure the sequence of Stiffness Factors used during the iterative analysis.
- Automatic Group Creation: For beam elements, Element Groups are automatically created based on the final stiffness values after the iterative analysis is completed.
How to Use
Launch the plugin and enter the required settings for beams or walls using the tabs at the top.
Select the target members in the MIDAS model, and then click Sync from product. For beam stiffness tuning, the currently selected beam elements are imported into the plugin. For wall stiffness tuning, the selected wall elements can be organized based on Wall ID and story information.
If necessary, all members assigned to a specific Section or Wall ID can be selected at once.
- This option allows the existing Section Stiffness Factor applied to beams to be considered during the tuning process. When enabled, both the Element Stiffness Factor and the existing Section Stiffness Factor are considered, and the lower stiffness value is used for analysis and design checks.
Set the Decrement Stiffness Step Value. The plugin generates a stiffness reduction sequence from 100% to lower stiffness values based on the specified interval. The generated values are displayed under Stiffness decrement sequence.
- Enter a value in Value to insert to add the specified value to the Stiffness decrement sequence.
- The values listed under Stiffness decrement sequence are available in Value to delete. Select a value to remove it from the sequence.
- Enter the Iteration Number and Target Ratio. The Target Ratio is the design check criterion used to determine whether further stiffness reduction is required.
Under Analysis scope, specify whether both beams and walls are included in the analysis or whether only one member type is processed.
Review the final results dialog. The results provide a summary of members that still exceed the target ratio, members that have reached the minimum stiffness limit, and the final stiffness values applied to the selected elements.
For beam members, once the final iteration is completed, stiffness groups are automatically created in the MIDAS model. The selected elements are assigned to the corresponding groups according to their final stiffness ratios.
- Click Back to return to the main page.
- Click Refresh to update the plugin with the latest model information after opening a different model or making changes to the current model.