Trade Journals for the Concrete Industry

In the true sense of the word, towers are the pillars that rigidly support wind turbines. There are huge forces exerted on these pillars during wind harvesting and they deflect and transfer the vibrations occurring during operation of these installations via its foundations – a real challenge on structural design, engineering, and material. At the same time, annual electrical energy revenues of these installations increase by 0.5 to 1.0 percent with each and every metre that the installation extends upwards. It is therefore especially with inland installations that the underlying principle goes like this: the higher the tower, the better its wind shear and hence harvesting stats. Hybrid towers from Max Bögl Wind are predestined for appreciable wind harvesting figures as of hub heights of 130 metres. In their lower section, these towers consist of concrete elements with a tubular steel tipping. On the other hand, tubular steel towers beyond a hub height of about 140 metres can no longer be considered economical, since material and maintenance costs to be faced with such heights are tremendous. For second-generation hybrid towers, Max Bögl Wind AG is thus counting on concrete strength classes ranging from C80/95 to C100/115. To develop these towers and to determine the materials to be used, the company is relying on valuable experience gathered by the Bögl Group.