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Tapered Beam-Column with non-prismatic elements for Electrical Transmission Structure Supports
This invention uses a hybrid of latticed steel and tapered tubular steel technologies. Namely, latticed steel and tapered tubular steel pole technology, to provide a more economical structural support with the advantages of each. It utilizes latticed steel hot-rolled angles for bracing elements and cold formed steel plate for main leg elements. The tapered geometry of the leg elements provides a more optimum utilization of material by the use of a non-prismatic (tapered) element profile. This element consists of a bent plate shape profile that varies in structural section modulus vertically along the height of the structure which optimizes the use of steel material to resist the applied structural loads. The arms include an invention that allows for post-tensioning and thereby provides deflection control and/or the ability to modify the natural frequencies of vibration to mitigate vortex induced vibrations caused by wind. The main support elements in the arms are developed using plates formed into angle shapes that provide inherent gusset plate material to accommodate the bracing bolted connections without the need for separate gusset plates. The direct embedded portion of the structural design allows for transverse passive soil pressures to be collected by trapezoidal plates and resisted by the grillage superstructure. A transition section is subpart of the embedded structure portion and accommodates multiple structure heights as a standard foundation system.
Tapered Beam-Column with non-prismatic elements for Electrical Transmission Structure Supports
This invention uses a hybrid of latticed steel and tapered tubular steel technologies. Namely, latticed steel and tapered tubular steel pole technology, to provide a more economical structural support with the advantages of each. It utilizes latticed steel hot-rolled angles for bracing elements and cold formed steel plate for main leg elements. The tapered geometry of the leg elements provides a more optimum utilization of material by the use of a non-prismatic (tapered) element profile. This element consists of a bent plate shape profile that varies in structural section modulus vertically along the height of the structure which optimizes the use of steel material to resist the applied structural loads. The arms include an invention that allows for post-tensioning and thereby provides deflection control and/or the ability to modify the natural frequencies of vibration to mitigate vortex induced vibrations caused by wind. The main support elements in the arms are developed using plates formed into angle shapes that provide inherent gusset plate material to accommodate the bracing bolted connections without the need for separate gusset plates. The direct embedded portion of the structural design allows for transverse passive soil pressures to be collected by trapezoidal plates and resisted by the grillage superstructure. A transition section is subpart of the embedded structure portion and accommodates multiple structure heights as a standard foundation system.
Tapered Beam-Column with non-prismatic elements for Electrical Transmission Structure Supports
MILLER MICHAEL DEAN (author)
2022-08-25
Patent
Electronic Resource
English
IPC:
E04H
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