How to Model Precast Concrete Poles in SAP 2000

When it comes to modeling precast concrete poles in structural analysis software like SAP 2000, the application's capabilities and specific requirements play a significant role in determining the feasibility and accuracy of the modeling process. Precast concrete poles are often utilized in various industries such as transmission and distribution, as well as telecommunication infrastructure. They are typically designed to be tapered, spun cast, and prestressed, providing structural integrity and stability in challenging environments.

Common Use Cases and Challenges

Precast concrete poles are commonly used in transmission and distribution (TD) work, but they are not often the primary choice for overload applications due to their pricing. For telecommunication purposes, however, they can be invaluable due to their strength and durability. If you are using a pole that resembles a concrete pile, it is important to model it as such. The modeling process for these poles can be intricate and may require specialized software or techniques.

Spun Cast Precast Concrete Poles and SAP 2000

Spun cast precast concrete poles pose unique challenges when it comes to modeling in SAP 2000. From my experience, spun cast poles are not easily represented using this software. I have extensive experience with telecom poles designed for manufacturing by Sherman, now owned by Valmont. ROHN, a company I previously worked for, had a proprietary program derived from an early version of SAP, but modifying it to handle spun cast poles proves too complex.

My experience with an ROHN project where HP computers were too old and costly to upgrade clearly illustrates the limitations of using SAP 2000 for these specific pole designs. The limitations of the software and the outdated hardware made it impractical to achieve accurate modeling. The conversion to a modern Windows environment would have been extremely expensive and impractical at that time.

Alternative Commercial Software

For users needing to model precast concrete poles, one commercially available software option is PLSCADD POLE. This software boasts robust capabilities for detailed modeling and is utilized by companies like Valmont for precision and accuracy. PLSCADD POLE operates by utilizing a structure file that is specific to the pole design, which includes all the necessary information about the structure.

The structure file for each pole is created and provided by Valmont, and it accounts for the unique characteristics of the design. This structure file ensures that the pole is divided into smaller segments, which are then connected together, providing a more accurate representation of the overall structure. This modeling technique allows for better load analysis and optimized design.

Conclusion

In conclusion, while SAP 2000 is a powerful tool for many structural analysis applications, it may not be the best fit for modeling spun cast precast concrete poles due to its limitations in handling these specific pole designs. For users in the telecommunication and infrastructure industries, utilizing specialized software like PLSCADD POLE provides a more reliable and accurate modeling solution.

By understanding the different modeling techniques and available software, engineers and designers can ensure that their projects are accurately and effectively represented, leading to better design and project outcomes.