Traditionally, structural engineers would design these monopoles by building a FEA model in a structural analysis software. After building these models, assigning the loads, and running the model, we would use the data results generated from the software to manually calculate whether the structural members and connections are sufficient to resist the inputted loads. Firstly, this tedious process requires us to use one program to run the model and another program or manual methods to implement calculations. Moreover, connections at the base and the foundation of the monopole are still yet to be designed.
CHECKPOLE, developed by Revolutio, is a software that specializes in designing and analyzing monopoles or cantilever columns that are subjected to lateral wind loads, its vertical self weight, and other horizontal loads. This comprehensive program can simultaneously build the model, assign the loads, run the model, AND calculate capacity results. This program can also implement connection and foundation checks.
What are CHECKPOLE's types of features?
CHECKPOLE can calculate for steel and timber monopoles (concrete for Rocla monopoles). You can also customize your monopole shaft’s dimensions and properties by specifying its shape, its thickness, its height, and geometric dimensions.
Aside from wind loads, you can also input any type of loads, in the form of area, point, and uniformly distributed loads, such as collision loads, barrier loads, or other notional horizontal forces.
You can also use the area load wizard to calculate the ESA. In this wizard, you can access the ancillary library to select an ancillary from 400 standard antennas built into CHECKPOLE or create your own ancillary. Once selected, you can customize the quantity, bearing, and shielding of ancillaries to determine your Cd, ancillaries mass, and ESA.
Openings for utilities and maintenance are also catered in CHECKPOLE. You can add your number of openings in the software, the location of the openings relative to the shaft height, the width and height of the openings, and the angle of the openings relative to the center axis of the shaft. This is particularly useful, since stress can accumulate at openings and particular attention to the analysis results would need to be made to these opening locations.
There are over 200 standard steel and concrete poles from various manufacturers in CHECKPOLE. You can even build your own custom libraries. When you are to design with any of these suppliers’ monopoles, you just need to input what type of pole you are designing for. Then, input your loads, connection layout, foundation dimensions, and setting out. Run your model. And, VOILA! You have your analysis results.
Wind pressures, wind speeds, and site conditions can be automatically derived by inputting the site location or the wind region on the Google Maps integration in CHECKPOLE. There is no need to go to any windspeed website to find your windspeeds at the specific sites. The software also automatically determines the appropriate design standard to be used for analysis once the region and monopole properties are inputted.
If you are working with TIA-222-G wind code, you can automatically determine wind speed at your region, Kz category, and Kzt multiplier. For AS/NZS 1170.2 wind code, you can determine Mz,cat multiplier, Mz shielding multiplier, Mt topographic multiplier, and lee zone detection. For Mt multiplier, CHECKPOLE also displays a derivation of topographic multiplier values for each wind direction and a terrain profile for 16 wind directions with its relative distance to the proposed site.
CHECKPOLE also designs for pad footings with concrete plinths on top. Once you have finished entering your soil types, soil densities, soil strata depths, soil bearing pressures, dimensions and thickness of the pad footing, plinth dimensions and height, CHECKPOLE then automatically indicates whether your pad footing dimensions are structurally adequate by implementing overturning, bearing, and sliding checks. Typically, you would need to transfer your reaction forces of the monopole model from a structural analysis software to a foundation analysis software. CHECKPOLE does that for you in one user interface. You can also immediately visualize how your pad footing looks like in relationship to the plinth and the monopole under different section and plan views.
Connection design in CHECKPOLE is based on wind load directions. For example, when you click on the North-east portion of the connection detail, you can obtain the design/capacity percentage of bearing, bolt connection, and baseplate at the North-east wind direction. Yellow highlighted zones indicate the compression zones of the connection of a corresponding wind direction.
Based on inputted natural frequency and your chosen load combination, you can derive graphical results of moment, shear, axial, rotation, and deflection effects versus the pole’s relative height. You can also obtain a graph that depicts wind speed and pressures at different pole heights. To obtain accurate results, non-linear second order analysis is implemented with several iterations to optimize convergence tolerance.
Aside from design/capacity percentages displayed in the results table, you can also obtain calculation derivation reports at different relative heights of the pole, such as calculation on moment, torsion, shear, buckling, and axial compression checks. Combined checks, such as compression-reduced biaxial bending check, are also provided. The values in the table below show the maximum critical percentages out of all combined checks for conservativeness. CHECKPOLE also shows which wind direction is the controlling one at the side bars.
Monopoles can also fail and deform by repeated cyclic loading. Fatigue design to AASHTO 2013 and ASI 2012 is also automatically implemented. The table of results also provides fatigue detail categories based on your corresponding international code, the design stress, the fatigue limit, and the design/capacity percentage of fatigue.
CHECKPOLE also produces a report, which summarizes material and section properties of the monopole, site and wind pressure multipliers, connection and foundation properties derived in the analysis. The report also summarizes the maximum moment, shear, axial, and torsion design loads.