The Siemens Concrete Wind Tower Prototype project in Iowa.
Thornton Tomasetti was a member of a uniquely-qualified team assembled for the Siemens Concrete Wind Tower Prototype project, which reaches a hub height of 115 meters, making it the tallest wind tower in North America. This new wind tower prototype incorporates segmental, match-cast reinforced concrete ring walls that are constructed on-site with reusable formwork. The ring wall segments are then lifted into place and vertically stacked. Post-tensioning steel techniques, similar to segmental precast bridge construction, are used to anchor the tower segments to the pedestal base.
The record height of the wind tower allows for higher energy production in many geographical markets in which the new wind turbine is planned to be deployed. According to our colleagues at Siemens and WTT, over the next five years, an estimated 17,000 new steel and concrete wind towers will be constructed in the United States and will achieve a potential 47 gigawatts of energy production.
Tall and Slender Building Expertise
From the onset of the project, Thornton Tomasetti’s tall and slender concrete tower design experience was brought to bear to evaluate and refine the prototype concept. Key topics for which we provided technical leadership on include concrete mix design performance requirements, advanced analytical investigations of the tower dynamic properties, vertical shortening analyses and predications due to the creep and shrinkage effects of concrete, and fatigue analyses and design.
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