SAP2000 : Step by Step Pemodelan Jembatan Rangka Baja_part3 - Hinawan T. Santoso, ST, MT

Introduction

This tutorial provides a step-by-step guide for analyzing the output and optimizing the profiles of a steel truss bridge model using SAP2000. This part of the series builds on previous tutorials focused on the modeling and loading of a 40-meter steel truss bridge. Understanding how to interpret the output and optimize the design is crucial for civil engineering projects.

Step 1: Review the Model Output

1. Open Your SAP2000 Project:

   • Launch SAP2000 and load your previously created bridge model.

2. Access the Output Viewer:

   • Navigate to the Display menu and select Show Results.
   • Choose the type of analysis output you wish to view (e.g., deformations, internal forces).

3. Interpret Key Results:

   • Focus on:
     • Deflections: Check for maximum deflections to ensure they are within acceptable limits.
     • Bending Moments: Analyze the bending moments in the truss members.
     • Shear Forces: Review shear force diagrams for critical sections.

4. Use Graphical Tools:

   • Utilize the graphical output tools to visualize results, which can help in understanding complex data more easily.

Step 2: Optimize the Truss Profile

1. Identify Critical Members:

   • Determine which members experience the highest stress and deformation based on your previous output review.

2. Select Optimal Profiles:

   • Go to the Define menu and select Section Properties.
   • Choose appropriate profiles for the truss members based on the loads and performance requirements.

3. Re-run the Analysis:

   • After changing profiles, re-analyze the model to see how these changes affect performance.
   • Check if the new profiles meet safety and serviceability criteria.

4. Iterate as Necessary:

   • Continue adjusting member sizes and profiles as required until an optimal design is reached.

Step 3: Validate Your Results

1. Perform a Code Check:

   • Ensure that the optimized design adheres to relevant engineering codes and standards.

2. Conduct a Sensitivity Analysis:

   • Test how changes in loading conditions or material properties affect your optimized design.
   • This can highlight potential weaknesses in your design.

3. Document Findings:

   • Keep a record of the various profiles and configurations tested along with their performance results for future reference.

Conclusion

In this tutorial, you've learned how to analyze the output of your SAP2000 bridge model and optimize the profiles of its truss members effectively. Remember to validate your results against engineering standards and document your findings. For further learning, consider exploring more advanced features of SAP2000 or tackling different types of structures in your future projects. Stay tuned for more tutorials to enhance your skills in civil engineering software.